Will use public repo instead.
+++ /dev/null
-/*
- * Generic DFU Bootloader
- *
- * (c) 2020 Martin Mareš <mj@ucw.cz>
- *
- * Based on example code from the libopencm3 project, which is
- * Copyright (C) 2010 Gareth McMullin <gareth@blacksphere.co.nz>
- *
- * Licensed under the GNU LGPL v3 or any later version.
- */
-
-#include "util.h"
-
-#include <libopencm3/cm3/cortex.h>
-#include <libopencm3/cm3/nvic.h>
-#include <libopencm3/cm3/scb.h>
-#include <libopencm3/cm3/systick.h>
-#include <libopencm3/stm32/rcc.h>
-#include <libopencm3/stm32/crc.h>
-#include <libopencm3/stm32/gpio.h>
-#include <libopencm3/stm32/flash.h>
-#include <libopencm3/stm32/usart.h>
-#include <libopencm3/stm32/desig.h>
-#include <libopencm3/usb/usbd.h>
-#include <libopencm3/usb/dfu.h>
-
-#include <string.h>
-
-#ifdef BOOTLOADER_DEBUG
-#define DEBUG(x...) debug_printf(x)
-#else
-#define DEBUG(x...) do { } while (0)
-#endif
-
-// Offsets to firmware header fields (see tools/dfu-sign.c)
-#define HDR_LENGTH 0x1c
-#define HDR_FLASH_IN_PROGRESS 0x20
-
-// DFU blocks should be equal to erase blocks of the flash
-#define BLOCK_SIZE 1024
-byte usbd_control_buffer[BLOCK_SIZE];
-
-static enum dfu_state dfu_state = STATE_DFU_IDLE;
-static uint timeout;
-#define DEFAULT_TIMEOUT 5000 // ms
-#define DFU_TIMEOUT 2000
-
-static struct {
- byte buf[sizeof(usbd_control_buffer)];
- u16 blocknum;
- u16 len;
-} prog;
-
-static char usb_serial_number[13];
-
-enum usb_string {
- STR_MANUFACTURER = 1,
- STR_PRODUCT,
- STR_SERIAL,
-};
-
-static const char *usb_strings[] = {
- BOOTLOADER_MFG_NAME,
- BOOTLOADER_PROD_NAME,
- usb_serial_number,
-};
-
-const struct usb_device_descriptor dev = {
- .bLength = USB_DT_DEVICE_SIZE,
- .bDescriptorType = USB_DT_DEVICE,
- .bcdUSB = 0x0200,
- .bDeviceClass = 0,
- .bDeviceSubClass = 0,
- .bDeviceProtocol = 0,
- .bMaxPacketSize0 = 64,
- .idVendor = BOOTLOADER_MFG_ID,
- .idProduct = BOOTLOADER_PROD_ID,
- .bcdDevice = BOOTLOADER_PROD_VERSION,
- .iManufacturer = STR_MANUFACTURER,
- .iProduct = STR_PRODUCT,
- .iSerialNumber = STR_SERIAL,
- .bNumConfigurations = 1,
-};
-
-const struct usb_dfu_descriptor dfu_function = {
- .bLength = sizeof(struct usb_dfu_descriptor),
- .bDescriptorType = DFU_FUNCTIONAL,
- .bmAttributes = USB_DFU_CAN_DOWNLOAD | USB_DFU_WILL_DETACH,
- .wDetachTimeout = 255,
- .wTransferSize = BLOCK_SIZE,
- .bcdDFUVersion = 0x0100,
-};
-
-const struct usb_interface_descriptor iface = {
- .bLength = USB_DT_INTERFACE_SIZE,
- .bDescriptorType = USB_DT_INTERFACE,
- .bInterfaceNumber = 0,
- .bAlternateSetting = 0,
- .bNumEndpoints = 0,
- .bInterfaceClass = 0xFE, /* Device Firmware Upgrade */
- .bInterfaceSubClass = 1,
- .bInterfaceProtocol = 2,
- .extra = &dfu_function,
- .extralen = sizeof(dfu_function),
-};
-
-const struct usb_interface ifaces[] = {{
- .num_altsetting = 1,
- .altsetting = &iface,
-}};
-
-const struct usb_config_descriptor config = {
- .bLength = USB_DT_CONFIGURATION_SIZE,
- .bDescriptorType = USB_DT_CONFIGURATION,
- .wTotalLength = 0,
- .bNumInterfaces = 1,
- .bConfigurationValue = 1,
- .iConfiguration = 0,
- .bmAttributes = USB_CONFIG_ATTR_DEFAULT, // bus-powered
- .bMaxPower = 50, // multiplied by 2 mA
- .interface = ifaces,
-};
-
-static inline u32 get_u32(u32 addr)
-{
- return *(u32*)addr;
-}
-
-static inline u16 get_u16(u32 addr)
-{
- return *(u16*)addr;
-}
-
-static bool verify_firmware(void)
-{
- u32 len = get_u32(BOOTLOADER_APP_START + HDR_LENGTH);
- u16 flash_in_progress = get_u16(BOOTLOADER_APP_START + HDR_FLASH_IN_PROGRESS);
-
- // FIXME: Should check if len is reasonable
-
- crc_reset();
- u32 crc = crc_calculate_block((u32 *)BOOTLOADER_APP_START, len/4);
- u32 want_crc = get_u32(BOOTLOADER_APP_START + len);
- DEBUG("DFU: fip=%04x crc=%08x/%08x len=%u\n", (uint) flash_in_progress, (uint) crc, (uint) want_crc, (uint) len);
- if (flash_in_progress || crc != want_crc) {
- DEBUG("DFU: Bad firmware\n");
- return 0;
- }
-
- return 1;
-}
-
-static byte dfu_getstatus(usbd_device *usbd_dev UNUSED, u32 *bwPollTimeout)
-{
- switch (dfu_state) {
- case STATE_DFU_DNLOAD_SYNC:
- dfu_state = STATE_DFU_DNBUSY;
- *bwPollTimeout = 100;
- return DFU_STATUS_OK;
- case STATE_DFU_MANIFEST_SYNC:
- /* Device will reset when read is complete. */
- dfu_state = STATE_DFU_MANIFEST;
- return DFU_STATUS_OK;
- case STATE_DFU_ERROR:
- return DFU_STATUS_ERR_VERIFY;
- default:
- return DFU_STATUS_OK;
- }
-}
-
-static void dfu_getstatus_complete(usbd_device *usbd_dev UNUSED, struct usb_setup_data *req UNUSED)
-{
- switch (dfu_state) {
- case STATE_DFU_DNBUSY:
- if (prog.blocknum == 0) {
- // The "flash in progress" word is programmed as 0xffff first and reset later
- *(u16*)(prog.buf + HDR_FLASH_IN_PROGRESS) = 0xffff;
- }
- u32 baseaddr = BOOTLOADER_APP_START + prog.blocknum * BLOCK_SIZE;
- DEBUG("DFU: Block %u -> %08x + %u\n", prog.blocknum, (uint) baseaddr, prog.len);
- flash_unlock();
- flash_erase_page(baseaddr);
- for (uint i = 0; i < prog.len; i += 2)
- flash_program_half_word(baseaddr + i, *(u16*)(prog.buf + i));
- flash_lock();
- for (uint i = 0; i < prog.len; i++) {
- if (*(byte *)(baseaddr + i) != prog.buf[i]) {
- DEBUG("DFU: Verification failed\n");
- dfu_state = STATE_DFU_ERROR;
- }
- }
- dfu_state = STATE_DFU_DNLOAD_IDLE;
- return;
- case STATE_DFU_MANIFEST:
- // At the very end, re-flash the "flash in progress" word
- flash_unlock();
- flash_program_half_word(BOOTLOADER_APP_START + 0x20, 0);
- flash_lock();
- if (verify_firmware())
- dfu_state = STATE_DFU_MANIFEST_WAIT_RESET;
- else
- dfu_state = STATE_DFU_ERROR;
- return;
- default:
- return;
- }
-}
-
-static enum usbd_request_return_codes dfu_control_request(usbd_device *usbd_dev,
- struct usb_setup_data *req,
- byte **buf,
- u16 *len,
- void (**complete)(usbd_device *usbd_dev, struct usb_setup_data *req))
-{
- if ((req->bmRequestType & 0x7F) != 0x21)
- return USBD_REQ_NOTSUPP; /* Only accept class request. */
-
- DEBUG("DFU: Request %02x in state %d\n", req->bRequest, dfu_state);
- timeout = DFU_TIMEOUT;
-
- switch (req->bRequest) {
- case DFU_DNLOAD:
- if (len == NULL || *len == 0) {
- dfu_state = STATE_DFU_MANIFEST_SYNC;
- } else {
- /* Copy download data for use on GET_STATUS. */
- prog.blocknum = req->wValue;
- prog.len = *len;
- memcpy(prog.buf, *buf, *len);
- dfu_state = STATE_DFU_DNLOAD_SYNC;
- }
- return USBD_REQ_HANDLED;
- case DFU_CLRSTATUS:
- /* Clear error and return to dfuIDLE. */
- if (dfu_state == STATE_DFU_ERROR)
- dfu_state = STATE_DFU_IDLE;
- return USBD_REQ_HANDLED;
- case DFU_ABORT:
- /* Abort returns to dfuIDLE state. */
- dfu_state = STATE_DFU_IDLE;
- return USBD_REQ_HANDLED;
- case DFU_UPLOAD:
- /* Upload not supported for now. */
- return USBD_REQ_NOTSUPP;
- case DFU_GETSTATUS: {
- u32 bwPollTimeout = 0; /* 24-bit number of milliseconds */
- (*buf)[0] = dfu_getstatus(usbd_dev, &bwPollTimeout);
- (*buf)[1] = bwPollTimeout & 0xFF;
- (*buf)[2] = (bwPollTimeout >> 8) & 0xFF;
- (*buf)[3] = (bwPollTimeout >> 16) & 0xFF;
- (*buf)[4] = dfu_state;
- (*buf)[5] = 0; /* iString not used here */
- *len = 6;
- *complete = dfu_getstatus_complete;
- return USBD_REQ_HANDLED;
- }
- case DFU_GETSTATE:
- /* Return state with no state transition. */
- *buf[0] = dfu_state;
- *len = 1;
- return USBD_REQ_HANDLED;
- }
-
- return USBD_REQ_NOTSUPP;
-}
-
-static void dfu_set_config(usbd_device *usbd_dev, u16 wValue UNUSED)
-{
- usbd_register_control_callback(
- usbd_dev,
- USB_REQ_TYPE_CLASS | USB_REQ_TYPE_INTERFACE,
- USB_REQ_TYPE_TYPE | USB_REQ_TYPE_RECIPIENT,
- dfu_control_request);
-}
-
-static void dfu_reset(void)
-{
- dfu_state = STATE_DFU_IDLE;
-}
-
-/*
- * This is a modified version of rcc_clock_setup_in_hsi_out_48mhz(),
- * which properly turns off the PLL before setting its parameters.
- */
-static void my_rcc_clock_setup_in_hsi_out_48mhz(void)
-{
- /* Enable internal high-speed oscillator. */
- rcc_osc_on(RCC_HSI);
- rcc_wait_for_osc_ready(RCC_HSI);
-
- /* Select HSI as SYSCLK source. */
- rcc_set_sysclk_source(RCC_CFGR_SW_SYSCLKSEL_HSICLK);
-
- // XXX: Disable PLL
- rcc_osc_off(RCC_PLL);
-
- /*
- * Set prescalers for AHB, ADC, ABP1, ABP2.
- * Do this before touching the PLL (TODO: why?).
- */
- rcc_set_hpre(RCC_CFGR_HPRE_SYSCLK_NODIV); /*Set.48MHz Max.72MHz */
- rcc_set_adcpre(RCC_CFGR_ADCPRE_PCLK2_DIV8); /*Set. 6MHz Max.14MHz */
- rcc_set_ppre1(RCC_CFGR_PPRE1_HCLK_DIV2); /*Set.24MHz Max.36MHz */
- rcc_set_ppre2(RCC_CFGR_PPRE2_HCLK_NODIV); /*Set.48MHz Max.72MHz */
- rcc_set_usbpre(RCC_CFGR_USBPRE_PLL_CLK_NODIV); /*Set.48MHz Max.48MHz */
-
- /*
- * Sysclk runs with 48MHz -> 1 waitstates.
- * 0WS from 0-24MHz
- * 1WS from 24-48MHz
- * 2WS from 48-72MHz
- */
- flash_set_ws(FLASH_ACR_LATENCY_1WS);
-
- /*
- * Set the PLL multiplication factor to 12.
- * 8MHz (internal) * 12 (multiplier) / 2 (PLLSRC_HSI_CLK_DIV2) = 48MHz
- */
- rcc_set_pll_multiplication_factor(RCC_CFGR_PLLMUL_PLL_CLK_MUL12);
-
- /* Select HSI/2 as PLL source. */
- rcc_set_pll_source(RCC_CFGR_PLLSRC_HSI_CLK_DIV2);
-
- /* Enable PLL oscillator and wait for it to stabilize. */
- rcc_osc_on(RCC_PLL);
- rcc_wait_for_osc_ready(RCC_PLL);
-
- /* Select PLL as SYSCLK source. */
- rcc_set_sysclk_source(RCC_CFGR_SW_SYSCLKSEL_PLLCLK);
-
- /* Set the peripheral clock frequencies used */
- rcc_ahb_frequency = 48000000;
- rcc_apb1_frequency = 24000000;
- rcc_apb2_frequency = 48000000;
-}
-
-static void clock_plain_hsi(void)
-{
- // Select HSI as SYSCLK source
- rcc_set_sysclk_source(RCC_CFGR_SW_SYSCLKSEL_HSICLK);
-
- // Disable PLL
- rcc_osc_off(RCC_PLL);
-
- // Set prescalers for AHB, ADC, ABP1, ABP2, USB to defaults
- rcc_set_hpre(RCC_CFGR_HPRE_SYSCLK_NODIV);
- rcc_set_adcpre(RCC_CFGR_ADCPRE_PCLK2_DIV2);
- rcc_set_ppre1(RCC_CFGR_PPRE1_HCLK_NODIV);
- rcc_set_ppre2(RCC_CFGR_PPRE2_HCLK_NODIV);
- rcc_set_usbpre(RCC_CFGR_USBPRE_PLL_VCO_CLK_DIV3);
-}
-
-static void reset_peripherals(void)
-{
- // Turn off clock to all peripherals and reset them
- RCC_AHBENR = 0x00000014;
- RCC_APB1ENR = 0;
- RCC_APB2ENR = 0;
- RCC_APB1RSTR = 0x22fec9ff;
- RCC_APB2RSTR = 0x0038fffd;
- RCC_APB1RSTR = 0;
- RCC_APB2RSTR = 0;
-}
-
-static void configure_hardware(void)
-{
- rcc_periph_clock_enable(RCC_GPIOA);
- rcc_periph_clock_enable(RCC_GPIOC);
- rcc_periph_clock_enable(RCC_USB);
- rcc_periph_clock_enable(RCC_CRC);
-
-#ifdef DEBUG_USART
- // Currently, only USART1 is supported
- rcc_periph_clock_enable(RCC_USART1);
- rcc_periph_reset_pulse(RST_USART1);
- gpio_set_mode(GPIOA, GPIO_MODE_OUTPUT_50_MHZ, GPIO_CNF_OUTPUT_ALTFN_PUSHPULL, GPIO9);
-
- usart_set_baudrate(USART1, 115200);
- usart_set_databits(USART1, 8);
- usart_set_stopbits(USART1, USART_STOPBITS_1);
- usart_set_mode(USART1, USART_MODE_TX);
- usart_set_parity(USART1, USART_PARITY_NONE);
- usart_set_flow_control(USART1, USART_FLOWCONTROL_NONE);
-
- usart_enable(USART1);
-#endif
-
-#ifdef DEBUG_LED_BLUEPILL
- // BluePill LED
- gpio_set_mode(GPIOC, GPIO_MODE_OUTPUT_50_MHZ, GPIO_CNF_OUTPUT_PUSHPULL, GPIO13);
- debug_led(1);
-#endif
-
- // Systick: set to overflow in 1 ms, will use only the overflow flag, no interrupts
- systick_set_frequency(1000, CPU_CLOCK_MHZ * 1000000);
- systick_clear();
- systick_counter_enable();
-}
-
-static void usb_disconnect(void)
-{
- gpio_set_mode(GPIOA, GPIO_MODE_OUTPUT_50_MHZ, GPIO_CNF_OUTPUT_OPENDRAIN, GPIO11 | GPIO12);
- gpio_clear(GPIOA, GPIO11 | GPIO12);
- for (uint i=0; i<100; i++) {
- while (!systick_get_countflag())
- ;
- }
-}
-
-int main(void)
-{
- usbd_device *usbd_dev;
-
- reset_peripherals();
-
- // Flash programming requires running on the internal oscillator
- my_rcc_clock_setup_in_hsi_out_48mhz();
-
- configure_hardware();
- desig_get_unique_id_as_dfu(usb_serial_number);
-
- DEBUG("DFU: Started (SN %s)\n", usb_serial_number);
-
- usb_disconnect();
-
- DEBUG("DFU: Ready\n");
- debug_led(0);
-
- usbd_dev = usbd_init(&st_usbfs_v1_usb_driver, &dev, &config, usb_strings, ARRAY_SIZE(usb_strings), usbd_control_buffer, sizeof(usbd_control_buffer));
- usbd_register_reset_callback(usbd_dev, dfu_reset);
- usbd_register_set_config_callback(usbd_dev, dfu_set_config);
-
-restart: ;
-
- timeout = DEFAULT_TIMEOUT;
- while (timeout || (dfu_state != STATE_DFU_IDLE && dfu_state != STATE_DFU_MANIFEST_WAIT_RESET)) {
- usbd_poll(usbd_dev);
- if (timeout && systick_get_countflag()) {
- timeout--;
- // FIXME: Blink LED even after timeout
- if (!(timeout & 0x3f))
- debug_led_toggle();
- }
- }
-
- if (!verify_firmware())
- goto restart;
-
- u32 sp = get_u32(BOOTLOADER_APP_START);
- u32 pc = get_u32(BOOTLOADER_APP_START + 4);
- DEBUG("DFU: Boot (sp=%08x pc=%08x)\n", (uint) sp, (uint) pc);
-
-#ifdef DEBUG_USART
- debug_flush();
-#endif
- debug_led(0);
-
- reset_peripherals();
- clock_plain_hsi();
-
- /* Set vector table base address. */
- SCB_VTOR = BOOTLOADER_APP_START;
-
- /* Initialize master stack pointer. */
- asm volatile("msr msp, %0"::"g" (sp));
-
- /* Jump to application. */
- ((void (*)(void)) pc)();
-}
+++ /dev/null
-/*
- * Interface to DS18B20 Temperature Sensors
- *
- * (c) 2019 Martin Mareš <mj@ucw.cz>
- */
-
-#include "util.h"
-#include "ds18b20.h"
-#include "ext-timer.h"
-
-#include <libopencm3/cm3/cortex.h>
-#include <libopencm3/stm32/dma.h>
-#include <libopencm3/stm32/gpio.h>
-#include <libopencm3/stm32/rcc.h>
-#include <string.h>
-
-/*** Configuration ***/
-
-// You should set the following parameters in config.h
-
-// #define DS_TIMER TIM3
-// #define DS_GPIO GPIOA
-// #define DS_PIN GPIO7
-// #define DS_DMA DMA1
-// #define DS_DMA_CH 6
-
-// #undef DS_DEBUG
-// #undef DS_DEBUG2
-
-// Maximum number of supported sensors
-// #define DS_NUM_SENSORS 8
-
-#ifdef DS_DEBUG
-#define DEBUG debug_printf
-#else
-#define DEBUG(xxx, ...) do { } while (0)
-#endif
-
-#ifdef DS_DEBUG2
-#define DEBUG2 debug_printf
-#else
-#define DEBUG2(xxx, ...) do { } while (0)
-#endif
-
-static volatile u32 ds_dma_buffer;
-
-static bool ds_reset(void)
-{
- DEBUG2("DS18B20: Reset\n");
- timer_disable_counter(DS_TIMER);
- timer_one_shot_mode(DS_TIMER);
-
- // DMA for reading pin state
- ds_dma_buffer = 0xdeadbeef;
- dma_set_memory_address(DS_DMA, DS_DMA_CH, (u32) &ds_dma_buffer);
- dma_set_peripheral_address(DS_DMA, DS_DMA_CH, (u32) &GPIO_IDR(DS_GPIO));
- dma_set_number_of_data(DS_DMA, DS_DMA_CH, 1);
- dma_enable_channel(DS_DMA, DS_DMA_CH);
-
- // CC1 is used to drive the DMA (read line state at specified time)
- timer_disable_oc_output(DS_TIMER, TIM_OC1);
- timer_set_oc_mode(DS_TIMER, TIM_OC1, TIM_OCM_FROZEN);
- timer_set_oc_value(DS_TIMER, TIM_OC1, 560);
- timer_set_dma_on_compare_event(DS_TIMER);
- timer_enable_dma_cc1(DS_TIMER);
-
- // CC2 is used to generate pulses (return line to idle state at specified time)
- timer_set_oc_mode(DS_TIMER, TIM_OC2, TIM_OCM_FORCE_HIGH);
- timer_enable_oc_output(DS_TIMER, TIM_OC2);
- timer_set_oc_value(DS_TIMER, TIM_OC2, 480);
- timer_set_oc_polarity_low(DS_TIMER, TIM_OC2);
-
- // Set timer period to the length of the whole transaction (1 ms)
- timer_set_period(DS_TIMER, 999);
-
- // XXX: We do not know why this is needed...
- static bool once;
- if (!once) {
- for (int i=0; i<10000; i++) __asm__ volatile ("nop");
- once = 1;
- }
-
- // Pull line down and start timer
- timer_generate_event(DS_TIMER, TIM_EGR_UG);
- timer_set_oc_mode(DS_TIMER, TIM_OC2, TIM_OCM_INACTIVE);
- timer_enable_counter(DS_TIMER);
-
- // Wait until the timer expires
- while (timer_is_counter_enabled(DS_TIMER))
- ;
- // Counter is automatically disabled at the end of cycle
-
- // Disable DMA
- timer_disable_dma_cc1(DS_TIMER);
- dma_disable_channel(DS_DMA, DS_DMA_CH);
-
- DEBUG2("Init DMA: %08x [%u] (%u remains)\n",
- ds_dma_buffer,
- !!(ds_dma_buffer & DS_PIN),
- dma_get_number_of_data(DS_DMA, DS_DMA_CH));
-
- // Did the device respond?
- if (ds_dma_buffer & DS_PIN) {
- DEBUG("DS18B20: Initialization failed\n");
- return 0;
- } else
- return 1;
-}
-
-static void ds_send_bit(bool bit)
-{
- timer_set_period(DS_TIMER, 99); // Each write slot takes 100 μs
- timer_set_oc_mode(DS_TIMER, TIM_OC2, TIM_OCM_FORCE_HIGH);
- timer_set_oc_value(DS_TIMER, TIM_OC2, (bit ? 3 : 89)); // 1: 3μs pulse, 0: 89μs pulse
- timer_generate_event(DS_TIMER, TIM_EGR_UG);
- timer_set_oc_mode(DS_TIMER, TIM_OC2, TIM_OCM_INACTIVE);
- timer_enable_counter(DS_TIMER);
- while (timer_is_counter_enabled(DS_TIMER))
- ;
-}
-
-static void ds_send_byte(byte b)
-{
- DEBUG2("DS write: %02x\n", b);
- for (uint m = 1; m < 0x100; m <<= 1)
- ds_send_bit(b & m);
-}
-
-static bool ds_recv_bit(void)
-{
- timer_set_period(DS_TIMER, 79); // Each read slot takes 80μs
- timer_set_oc_value(DS_TIMER, TIM_OC2, 2); // Generate 2μs pulse to start read slot
- timer_set_oc_value(DS_TIMER, TIM_OC1, 8); // Sample data 8μs after start of slot
- timer_enable_dma_cc1(DS_TIMER);
-
- ds_dma_buffer = 0xdeadbeef;
- dma_set_number_of_data(DS_DMA, DS_DMA_CH, 1);
- dma_enable_channel(DS_DMA, DS_DMA_CH);
- timer_set_oc_mode(DS_TIMER, TIM_OC2, TIM_OCM_FORCE_HIGH);
- timer_generate_event(DS_TIMER, TIM_EGR_UG);
- timer_set_oc_mode(DS_TIMER, TIM_OC2, TIM_OCM_INACTIVE);
- timer_enable_counter(DS_TIMER);
- while (timer_is_counter_enabled(DS_TIMER))
- ;
- // DEBUG2("XXX %08x\n", ds_dma_buffer);
- bool out = ds_dma_buffer & DS_PIN;
- dma_disable_channel(DS_DMA, DS_DMA_CH);
-
- timer_disable_dma_cc1(DS_TIMER);
-
- return out;
-}
-
-static byte ds_recv_byte(void)
-{
- uint out = 0;
- for (uint m = 1; m < 0x100; m <<= 1) {
- if (ds_recv_bit())
- out |= m;
- }
-
- DEBUG2("DS read: %02x\n", out);
- return out;
-}
-
-static byte ds_buf[10];
-
-static byte ds_crc_block(uint n)
-{
- /// XXX: This might be worth optimizing
- uint crc = 0;
-
- for (uint i = 0; i < n; i++) {
- byte b = ds_buf[i];
- for (uint j = 0; j < 8; j++) {
- uint k = (b & 1) ^ (crc >> 7);
- crc = (crc << 1) & 0xff;
- if (k)
- crc ^= 0x31;
- b >>= 1;
- }
- }
-
- return crc;
-}
-
-static bool ds_recv_block(uint n)
-{
- for (uint i = 0; i < n; i++)
- ds_buf[i] = ds_recv_byte();
-
- byte crc = ds_crc_block(n);
- if (crc) {
- DEBUG("DS18B20: Invalid CRC %02x\n", crc);
- return 0;
- }
- return 1;
-}
-
-struct ds_sensor ds_sensors[DS_NUM_SENSORS];
-
-#if DS_NUM_SENSORS == 1
-
-static void ds_enumerate(void)
-{
- if (!ds_reset())
- return;
-
- ds_send_byte(0x33); // READ_ROM
- if (!ds_recv_block(8))
- return;
-
- DEBUG("DS18B20: Found sensor ");
- for (uint i = 0; i < 8; i++) {
- DEBUG("%02x", ds_buf[i]);
- ds_sensors[0].address[i] = ds_buf[i];
- }
- DEBUG("\n");
-}
-
-#else
-
-static void ds_enumerate(void)
-{
- /*
- * The enumeration algorithm roughly follows the one described in the
- * Book of iButton Standards (Maxim Integrated Application Note 937).
- *
- * It simulates depth-first search on the trie of all device IDs.
- * In each pass, it walks the trie from the root and recognizes branching nodes.
- *
- * The old_choice variable remembers the deepest left branch taken in the
- * previous pass, new_choice is the same for the current pass.
- */
-
- DEBUG("DS18B20: Enumerate\n");
-
- uint num_sensors = 0;
- byte *addr = ds_buf;
- byte old_choice = 0;
-
- for (;;) {
- if (!ds_reset()) {
- DEBUG("DS18B20: Enumeration found no sensor\n");
- return;
- }
-
- ds_send_byte(0xf0); // SEARCH_ROM
- byte new_choice = 0;
- for (byte i=0; i<64; i++) {
- bool have_one = ds_recv_bit();
- bool have_zero = ds_recv_bit();
- bool old_bit = addr[i/8] & (1U << (i%8));
- bool new_bit;
- switch (2*have_one + have_zero) {
- case 3:
- // This should not happen
- DEBUG("DS18B20: Enumeration failed\n");
- return;
- case 1:
- // Only 0
- new_bit = 0;
- break;
- case 2:
- // Only 1
- new_bit = 1;
- break;
- default:
- // Both
- if (i == old_choice)
- new_bit = 1;
- else if (i > old_choice) {
- new_bit = 0;
- new_choice = i;
- } else {
- new_bit = old_bit;
- if (!new_bit)
- new_choice = i;
- }
- }
- if (new_bit)
- addr[i/8] |= 1U << (i%8);
- else
- addr[i/8] &= ~(1U << (i%8));
- ds_send_bit(new_bit);
- }
-
- if (num_sensors >= DS_NUM_SENSORS) {
- DEBUG("DS18B20: Too many sensors\n");
- return;
- }
-
- DEBUG("DS18B20: Found sensor #%u: ", num_sensors);
- for (byte i=0; i<8; i++)
- DEBUG("%02x", addr[i]);
- if (ds_crc_block(8)) {
- DEBUG(" - invalid CRC!\n");
- } else if (ds_buf[0] == 0x28) {
- DEBUG("\n");
- memcpy(ds_sensors[num_sensors].address, ds_buf, 8);
- num_sensors++;
- } else {
- DEBUG(" - wrong type\n");
- }
-
- old_choice = new_choice;
- if (!old_choice)
- break;
- }
-}
-
-#endif
-
-void ds_init(void)
-{
- DEBUG("DS18B20: Init\n");
-
- for (uint i = 0; i < DS_NUM_SENSORS; i++) {
- memset(ds_sensors[i].address, 0, 8);
- ds_sensors[i].current_temp = DS_TEMP_UNKNOWN;
- }
-
- dma_set_read_from_peripheral(DS_DMA, DS_DMA_CH);
- dma_set_priority(DS_DMA, DS_DMA_CH, DMA_CCR_PL_VERY_HIGH);
- dma_disable_peripheral_increment_mode(DS_DMA, DS_DMA_CH);
- dma_enable_memory_increment_mode(DS_DMA, DS_DMA_CH);
- dma_set_peripheral_size(DS_DMA, DS_DMA_CH, DMA_CCR_PSIZE_16BIT);
- dma_set_memory_size(DS_DMA, DS_DMA_CH, DMA_CCR_MSIZE_16BIT);
-
- timer_set_prescaler(DS_TIMER, CPU_CLOCK_MHZ - 1); // 1 tick = 1 μs
- timer_set_mode(DS_TIMER, TIM_CR1_CKD_CK_INT, TIM_CR1_CMS_EDGE, TIM_CR1_DIR_UP);
- timer_disable_preload(DS_TIMER);
-
- gpio_set_mode(DS_GPIO, GPIO_MODE_OUTPUT_50_MHZ, GPIO_CNF_OUTPUT_ALTFN_OPENDRAIN, DS_PIN);
-
- ds_enumerate();
-
- // FIXME: Configure precision?
-}
-
-#if DS_NUM_SENSORS == 1
-#define ds_current_id 0
-#else
- static byte ds_current_id;
-#endif
-
-static bool ds_activate(void)
-{
- if (!ds_reset()) {
- DEBUG("DS18B20: Reset failed\n");
- return false;
- }
-#if DS_NUM_SENSORS == 1
- ds_send_byte(0xcc); // SKIP_ROM
-#else
- ds_send_byte(0x55); // MATCH_ROM
- for (uint i = 0; i < 8; i++)
- ds_send_byte(ds_sensors[ds_current_id].address[i]);
-#endif
- return true;
-}
-
-void ds_step(void)
-{
- static byte ds_running;
- static byte ds_timeout;
-
- if (!ds_running) {
- // Start measurement
-#if DS_NUM_SENSORS != 1
- uint maxn = DS_NUM_SENSORS;
- do {
- if (!maxn--)
- return;
- ds_current_id++;
- if (ds_current_id >= DS_NUM_SENSORS) {
- ds_current_id = 0;
- }
- } while (!ds_sensors[ds_current_id].address[0]);
-#endif
- if (!ds_activate()) {
- ds_sensors[ds_current_id].current_temp = DS_TEMP_UNKNOWN;
- return;
- }
- ds_send_byte(0x44); // CONVERT_T
- ds_running = 1;
- ds_timeout = 255;
- } else {
- // Still running?
- if (!ds_recv_bit()) {
- if (!ds_timeout--) {
- DEBUG("DS18B20 #%u: Timeout\n", ds_current_id);
- ds_sensors[ds_current_id].current_temp = DS_TEMP_UNKNOWN;
- ds_running = 0;
- }
- return;
- }
- ds_running = 0;
-
- // Read scratch pad
- if (!ds_activate())
- return;
- ds_send_byte(0xbe); // READ_SCRATCHPAD
- if (!ds_recv_block(9)) {
- ds_sensors[ds_current_id].current_temp = DS_TEMP_UNKNOWN;
- return;
- }
- int t = (int16_t) (ds_buf[0] | (ds_buf[1] << 8));
- t = t * 1000 / 16;
-
- DEBUG("DS18B20 #%u: %d.%03d degC\n", ds_current_id, t / 1000, t % 1000);
- ds_sensors[ds_current_id].current_temp = t;
- }
-}
+++ /dev/null
-/*
- * Interface to DS18B20 Temperature Sensors
- *
- * (c) 2019 Martin Mareš <mj@ucw.cz>
- */
-
-#ifndef _DS18B20_H
-#define _DS18B20_H
-
-struct ds_sensor {
- byte address[8]; // All zeroes if sensor does not exist.
- // Otherwise, address[0] is guaranteed to be non-zero.
- int current_temp; // Temperature in m°C or DS_TEMP_UNKNOWN
-};
-
-extern struct ds_sensor ds_sensors[DS_NUM_SENSORS];
-
-#define DS_TEMP_UNKNOWN 0x7fffffff
-
-void ds_init(void);
-void ds_step(void);
-
-#endif
+++ /dev/null
-/*
- * Timer Functions Missing from LibOpenCM3
- *
- * (c) 2019 Martin Mareš <mj@ucw.cz>
- */
-
-#ifndef _EXT_TIMER_H
-#define _EXT_TIMER_H
-
-#include <libopencm3/stm32/timer.h>
-
-static inline bool timer_is_counter_enabled(u32 timer)
-{
- return TIM_CR1(timer) & TIM_CR1_CEN;
-}
-
-static inline void timer_enable_dma_cc1(u32 timer)
-{
- TIM_DIER(timer) |= TIM_DIER_CC1DE;
-}
-
-static inline void timer_disable_dma_cc1(u32 timer)
-{
- TIM_DIER(timer) &= ~TIM_DIER_CC1DE;
-}
-
-#endif
+++ /dev/null
-/*
- * Generic MODBUS Library for STM32
- *
- * (c) 2019 Martin Mareš <mj@ucw.cz>
- */
-
-#include "util.h"
-#include "modbus.h"
-
-#include <stddef.h>
-#include <string.h>
-
-#include <libopencm3/cm3/nvic.h>
-#include <libopencm3/stm32/gpio.h>
-#include <libopencm3/stm32/usart.h>
-#include <libopencm3/stm32/timer.h>
-
-/*** Configuration ***/
-
-// You should set the following parameters in config.h
-
-// USART (pins are expected to be configured by the caller)
-// #define MODBUS_USART USART2
-// #define MODBUS_NVIC_USART_IRQ NVIC_USART2_IRQ
-// #define MODBUS_USART_ISR usart2_isr
-
-// GPIO pin for transmitter enable (pins is expected to be configured by the caller)
-// #define MODBUS_TXEN_GPIO_PORT GPIOA
-// #define MODBUS_TXEN_GPIO_PIN GPIO1
-
-// Timer
-// #define MODBUS_TIMER TIM2
-// #define MODBUS_NVIC_TIMER_IRQ NVIC_TIM2_IRQ
-// #define MODBUS_TIMER_ISR tim2_isr
-
-// Slave address we are responding at
-// #define MODBUS_OUR_ADDRESS 42
-
-// Baud rate
-#ifndef MODBUS_BAUD_RATE
-#define MODBUS_BAUD_RATE 19200
-#endif
-
-// CPU clock frequency
-// #define CPU_CLOCK_MHZ 72
-
-// Receive buffer size (standard specifies 256 bytes, you can make it shorter if necessary)
-#ifndef MODBUS_RX_BUFSIZE
-#define MODBUS_RX_BUFSIZE 256
-#endif
-
-// Transmit buffer size (standard specifies 256 bytes, you can make it shorter if necessary)
-#ifndef MODBUS_TX_BUFSIZE
-#define MODBUS_TX_BUFSIZE 256
-#endif
-
-// Receive timeout in microseconds
-#ifndef MODBUS_RX_TIMEOUT
-#if MODBUS_BAUD_RATE <= 19200
-// For low baud rates, the standard specifies timeout of 1.5 character times
-// (1 character = start bit + 8 data bits + parity bit + stop bit = 11 bits)
-#define MODBUS_RX_TIMEOUT (1000000*11*3/2/MODBUS_BAUD_RATE)
-#else
-// For high rates, the timeout is fixed to 750 μs
-#define MODBUS_RX_TIMEOUT 750
-#endif
-#endif
-
-// Debugging
-// #define MODBUS_DEBUG
-
-#ifdef MODBUS_DEBUG
-#define DEBUG debug_printf
-#else
-#define DEBUG(xxx, ...) do { } while (0)
-#endif
-/*** State ***/
-
-enum mb_state {
- STATE_RX,
- STATE_RX_DONE,
- STATE_PROCESSING,
- STATE_TX,
- STATE_TX_LAST,
- STATE_TX_DONE,
-};
-
-static byte rx_buf[MODBUS_RX_BUFSIZE];
-static u16 rx_size;
-static byte rx_bad;
-static byte state; // STATE_xxx
-
-static byte *rx_frame;
-static byte *rx_frame_end;
-
-static byte tx_buf[MODBUS_TX_BUFSIZE];
-static u16 tx_size;
-static u16 tx_pos;
-static byte pending_error;
-
-static bool check_frame(void);
-static void process_frame(void);
-
-/*** Low-level layer ***/
-
-static void rx_init(void)
-{
- state = STATE_RX;
- rx_size = 0;
- rx_bad = 0;
- usart_set_mode(MODBUS_USART, USART_MODE_RX);
- usart_enable_rx_interrupt(MODBUS_USART);
- modbus_ready_hook();
-}
-
-static void rx_done(void)
-{
- state = STATE_RX_DONE;
- usart_disable_rx_interrupt(MODBUS_USART);
-}
-
-static void tx_init(void)
-{
- state = STATE_TX;
- tx_pos = 0;
- gpio_set(MODBUS_TXEN_GPIO_PORT, MODBUS_TXEN_GPIO_PIN);
- usart_set_mode(MODBUS_USART, USART_MODE_TX);
- usart_enable_tx_interrupt(MODBUS_USART);
-}
-
-static void tx_done(void)
-{
- state = STATE_TX_DONE;
- // usart_disable_tx_interrupt(MODBUS_USART); // Already done by irq handler
- gpio_clear(MODBUS_TXEN_GPIO_PORT, MODBUS_TXEN_GPIO_PIN);
-}
-
-void modbus_init(void)
-{
- DEBUG("MODBUS: Init\n");
-
- timer_set_prescaler(MODBUS_TIMER, CPU_CLOCK_MHZ-1); // 1 tick = 1 μs
- timer_set_mode(MODBUS_TIMER, TIM_CR1_CKD_CK_INT, TIM_CR1_CMS_EDGE, TIM_CR1_DIR_DOWN);
- timer_update_on_overflow(MODBUS_TIMER);
- timer_disable_preload(MODBUS_TIMER);
- timer_one_shot_mode(MODBUS_TIMER);
- timer_enable_irq(MODBUS_TIMER, TIM_DIER_UIE);
- nvic_enable_irq(MODBUS_NVIC_TIMER_IRQ);
-
- gpio_clear(MODBUS_TXEN_GPIO_PORT, MODBUS_TXEN_GPIO_PIN);
-
- usart_set_baudrate(MODBUS_USART, MODBUS_BAUD_RATE);
- usart_set_databits(MODBUS_USART, 9);
- usart_set_stopbits(MODBUS_USART, USART_STOPBITS_1);
- usart_set_parity(MODBUS_USART, USART_PARITY_EVEN);
- usart_set_flow_control(MODBUS_USART, USART_FLOWCONTROL_NONE);
-
- rx_init();
-
- nvic_enable_irq(MODBUS_NVIC_USART_IRQ);
- usart_enable(MODBUS_USART);
-}
-
-void MODBUS_USART_ISR(void)
-{
- u32 status = USART_SR(MODBUS_USART);
-
- if (status & USART_SR_RXNE) {
- uint ch = usart_recv(MODBUS_USART);
- if (state == STATE_RX) {
- if (status & (USART_SR_FE | USART_SR_ORE | USART_SR_NE)) {
- rx_bad = 1;
- } else if (rx_size < MODBUS_RX_BUFSIZE) {
- if (!rx_size)
- modbus_frame_start_hook();
- rx_buf[rx_size++] = ch;
- } else {
- // Frame too long
- rx_bad = 2;
- }
- timer_set_period(MODBUS_TIMER, MODBUS_RX_TIMEOUT);
- timer_generate_event(MODBUS_TIMER, TIM_EGR_UG);
- timer_enable_counter(MODBUS_TIMER);
- }
- }
-
- if (state == STATE_TX) {
- if (status & USART_SR_TXE) {
- if (tx_pos < tx_size) {
- usart_send(MODBUS_USART, tx_buf[tx_pos++]);
- } else {
- // The transmitter is double-buffered, so at this moment, it is transmitting
- // the last byte of the frame. Wait until transfer is completed.
- usart_disable_tx_interrupt(MODBUS_USART);
- USART_CR1(MODBUS_USART) |= USART_CR1_TCIE;
- state = STATE_TX_LAST;
- }
- }
- } else if (state == STATE_TX_LAST) {
- if (status & USART_SR_TC) {
- // Transfer of the last byte is complete. Release the bus.
- USART_CR1(MODBUS_USART) &= ~USART_CR1_TCIE;
- tx_done();
- rx_init();
- }
- }
-}
-
-void MODBUS_TIMER_ISR(void)
-{
- if (TIM_SR(MODBUS_TIMER) & TIM_SR_UIF) {
- TIM_SR(MODBUS_TIMER) &= ~TIM_SR_UIF;
- if (state == STATE_RX)
- rx_done();
- }
-}
-
-void modbus_loop(void)
-{
- if (state != STATE_RX_DONE)
- return;
- state = STATE_PROCESSING;
-
- if (!check_frame()) {
- rx_init();
- return;
- }
-
- DEBUG("MODBUS: < dest=%02x func=%02x len=%u\n", rx_buf[0], rx_buf[1], rx_size);
-
- if (rx_buf[0] == MODBUS_OUR_ADDRESS) {
- // Frame addressed to us: process and reply
- process_frame();
- DEBUG("MODBUS: > status=%02x len=%u\n", tx_buf[1], tx_size);
- tx_init();
- } else if (rx_buf[0] == 0x00) {
- // Broadcast frame: process, but do not reply
- process_frame();
- rx_init();
- } else {
- // Somebody else's frame: discard
- rx_init();
- }
-}
-
-/** CRC ***/
-
-static const byte crc_hi[] = {
- 0x00, 0xc1, 0x81, 0x40, 0x01, 0xc0, 0x80, 0x41, 0x01, 0xc0,
- 0x80, 0x41, 0x00, 0xc1, 0x81, 0x40, 0x01, 0xc0, 0x80, 0x41,
- 0x00, 0xc1, 0x81, 0x40, 0x00, 0xc1, 0x81, 0x40, 0x01, 0xc0,
- 0x80, 0x41, 0x01, 0xc0, 0x80, 0x41, 0x00, 0xc1, 0x81, 0x40,
- 0x00, 0xc1, 0x81, 0x40, 0x01, 0xc0, 0x80, 0x41, 0x00, 0xc1,
- 0x81, 0x40, 0x01, 0xc0, 0x80, 0x41, 0x01, 0xc0, 0x80, 0x41,
- 0x00, 0xc1, 0x81, 0x40, 0x01, 0xc0, 0x80, 0x41, 0x00, 0xc1,
- 0x81, 0x40, 0x00, 0xc1, 0x81, 0x40, 0x01, 0xc0, 0x80, 0x41,
- 0x00, 0xc1, 0x81, 0x40, 0x01, 0xc0, 0x80, 0x41, 0x01, 0xc0,
- 0x80, 0x41, 0x00, 0xc1, 0x81, 0x40, 0x00, 0xc1, 0x81, 0x40,
- 0x01, 0xc0, 0x80, 0x41, 0x01, 0xc0, 0x80, 0x41, 0x00, 0xc1,
- 0x81, 0x40, 0x01, 0xc0, 0x80, 0x41, 0x00, 0xc1, 0x81, 0x40,
- 0x00, 0xc1, 0x81, 0x40, 0x01, 0xc0, 0x80, 0x41, 0x01, 0xc0,
- 0x80, 0x41, 0x00, 0xc1, 0x81, 0x40, 0x00, 0xc1, 0x81, 0x40,
- 0x01, 0xc0, 0x80, 0x41, 0x00, 0xc1, 0x81, 0x40, 0x01, 0xc0,
- 0x80, 0x41, 0x01, 0xc0, 0x80, 0x41, 0x00, 0xc1, 0x81, 0x40,
- 0x00, 0xc1, 0x81, 0x40, 0x01, 0xc0, 0x80, 0x41, 0x01, 0xc0,
- 0x80, 0x41, 0x00, 0xc1, 0x81, 0x40, 0x01, 0xc0, 0x80, 0x41,
- 0x00, 0xc1, 0x81, 0x40, 0x00, 0xc1, 0x81, 0x40, 0x01, 0xc0,
- 0x80, 0x41, 0x00, 0xc1, 0x81, 0x40, 0x01, 0xc0, 0x80, 0x41,
- 0x01, 0xc0, 0x80, 0x41, 0x00, 0xc1, 0x81, 0x40, 0x01, 0xc0,
- 0x80, 0x41, 0x00, 0xc1, 0x81, 0x40, 0x00, 0xc1, 0x81, 0x40,
- 0x01, 0xc0, 0x80, 0x41, 0x01, 0xc0, 0x80, 0x41, 0x00, 0xc1,
- 0x81, 0x40, 0x00, 0xc1, 0x81, 0x40, 0x01, 0xc0, 0x80, 0x41,
- 0x00, 0xc1, 0x81, 0x40, 0x01, 0xc0, 0x80, 0x41, 0x01, 0xc0,
- 0x80, 0x41, 0x00, 0xc1, 0x81, 0x40
-};
-
-static const byte crc_lo[] = {
- 0x00, 0xc0, 0xc1, 0x01, 0xc3, 0x03, 0x02, 0xc2, 0xc6, 0x06,
- 0x07, 0xc7, 0x05, 0xc5, 0xc4, 0x04, 0xcc, 0x0c, 0x0d, 0xcd,
- 0x0f, 0xcf, 0xce, 0x0e, 0x0a, 0xca, 0xcb, 0x0b, 0xc9, 0x09,
- 0x08, 0xc8, 0xd8, 0x18, 0x19, 0xd9, 0x1b, 0xdb, 0xda, 0x1a,
- 0x1e, 0xde, 0xdf, 0x1f, 0xdd, 0x1d, 0x1c, 0xdc, 0x14, 0xd4,
- 0xd5, 0x15, 0xd7, 0x17, 0x16, 0xd6, 0xd2, 0x12, 0x13, 0xd3,
- 0x11, 0xd1, 0xd0, 0x10, 0xf0, 0x30, 0x31, 0xf1, 0x33, 0xf3,
- 0xf2, 0x32, 0x36, 0xf6, 0xf7, 0x37, 0xf5, 0x35, 0x34, 0xf4,
- 0x3c, 0xfc, 0xfd, 0x3d, 0xff, 0x3f, 0x3e, 0xfe, 0xfa, 0x3a,
- 0x3b, 0xfb, 0x39, 0xf9, 0xf8, 0x38, 0x28, 0xe8, 0xe9, 0x29,
- 0xeb, 0x2b, 0x2a, 0xea, 0xee, 0x2e, 0x2f, 0xef, 0x2d, 0xed,
- 0xec, 0x2c, 0xe4, 0x24, 0x25, 0xe5, 0x27, 0xe7, 0xe6, 0x26,
- 0x22, 0xe2, 0xe3, 0x23, 0xe1, 0x21, 0x20, 0xe0, 0xa0, 0x60,
- 0x61, 0xa1, 0x63, 0xa3, 0xa2, 0x62, 0x66, 0xa6, 0xa7, 0x67,
- 0xa5, 0x65, 0x64, 0xa4, 0x6c, 0xac, 0xad, 0x6d, 0xaf, 0x6f,
- 0x6e, 0xae, 0xaa, 0x6a, 0x6b, 0xab, 0x69, 0xa9, 0xa8, 0x68,
- 0x78, 0xb8, 0xb9, 0x79, 0xbb, 0x7b, 0x7a, 0xba, 0xbe, 0x7e,
- 0x7f, 0xbf, 0x7d, 0xbd, 0xbc, 0x7c, 0xb4, 0x74, 0x75, 0xb5,
- 0x77, 0xb7, 0xb6, 0x76, 0x72, 0xb2, 0xb3, 0x73, 0xb1, 0x71,
- 0x70, 0xb0, 0x50, 0x90, 0x91, 0x51, 0x93, 0x53, 0x52, 0x92,
- 0x96, 0x56, 0x57, 0x97, 0x55, 0x95, 0x94, 0x54, 0x9c, 0x5c,
- 0x5d, 0x9d, 0x5f, 0x9f, 0x9e, 0x5e, 0x5a, 0x9a, 0x9b, 0x5b,
- 0x99, 0x59, 0x58, 0x98, 0x88, 0x48, 0x49, 0x89, 0x4b, 0x8b,
- 0x8a, 0x4a, 0x4e, 0x8e, 0x8f, 0x4f, 0x8d, 0x4d, 0x4c, 0x8c,
- 0x44, 0x84, 0x85, 0x45, 0x87, 0x47, 0x46, 0x86, 0x82, 0x42,
- 0x43, 0x83, 0x41, 0x81, 0x80, 0x40
-};
-
-static u16 crc16(byte *buf, u16 len)
-{
- byte hi = 0xff, lo = 0xff;
-
- while (len--) {
- byte i = hi ^ *buf++;
- hi = lo ^ crc_hi[i];
- lo = crc_lo[i];
- }
-
- return (hi << 8 | lo);
-}
-
-/*** High-level layer ***/
-
-static bool check_frame(void)
-{
- if (rx_bad) {
- // FIXME: Error counters?
- DEBUG("MODBUS: RX bad\n");
- return false;
- }
-
- if (rx_size < 4) {
- // FIXME: Error counters?
- DEBUG("MODBUS: RX undersize\n");
- return false;
- }
-
- u16 crc = crc16(rx_buf, rx_size - 2);
- u16 rx_crc = (rx_buf[rx_size-2] << 8) | rx_buf[rx_size-1];
- if (crc != rx_crc) {
- // FIXME: Error counters?
- DEBUG("MODBUS: Bad CRC\n");
- return false;
- }
-
- rx_frame = rx_buf + 1;
- rx_frame_end = rx_frame + rx_size - 2;
- return true;
-}
-
-enum mb_function {
- FUNC_READ_COILS = 0x01,
- FUNC_READ_DISCRETE_INPUTS = 0x02,
- FUNC_READ_HOLDING_REGISTERS = 0x03,
- FUNC_READ_INPUT_REGISTERS = 0x04,
- FUNC_WRITE_SINGLE_COIL = 0x05,
- FUNC_WRITE_SINGLE_REGISTER = 0x06,
- FUNC_READ_EXCEPTION_STATUS = 0x07,
- FUNC_DIAGNOSTICS = 0x08,
- FUNC_GET_COMM_EVENT_COUNTER = 0x0b,
- FUNC_GET_COMM_EVENT_LOG = 0x0c,
- FUNC_WRITE_MULTIPLE_COILS = 0x0f,
- FUNC_WRITE_MULTIPLE_REGISTERS = 0x10,
- FUNC_REPORT_SLAVE_ID = 0x11,
- FUNC_READ_FILE_RECORD = 0x14,
- FUNC_WRITE_FILE_RECORD = 0x15,
- FUNC_MASK_WRITE_REGISTER = 0x16,
- FUNC_READ_WRITE_MULTIPLE_REGISTERS = 0x17,
- FUNC_READ_FIFO_QUEUE = 0x18,
- FUNC_ENCAPSULATED_INTERFACE_TRANSPORT = 0x2b,
-};
-
-enum mb_error {
- ERR_ILLEGAL_FUNCTION = 0x01,
- ERR_ILLEGAL_DATA_ADDRESS = 0x02,
- ERR_ILLEGAL_DATA_VALUE = 0x03,
- ERR_SLAVE_DEVICE_FAILURE = 0x04,
-};
-
-static uint read_remains(void)
-{
- return rx_frame_end - rx_frame;
-}
-
-static byte read_byte(void)
-{
- return *rx_frame++;
-}
-
-static u16 read_u16(void)
-{
- byte hi = *rx_frame++;
- byte lo = *rx_frame++;
- return (hi << 8) | lo;
-}
-
-static void write_byte(byte v)
-{
- tx_buf[tx_size++] = v;
-}
-
-static void write_u16(u16 v)
-{
- write_byte(v >> 8);
- write_byte(v);
-}
-
-static bool body_fits(uint body_len)
-{
- // body_len excludes slave address, function code, and CRC
- return (2 + body_len + 2 <= MODBUS_TX_BUFSIZE);
-}
-
-static void report_error(byte code)
-{
- // Discard the partially constructed body of the reply and rewrite the header
- tx_buf[1] |= 0x80;
- tx_buf[2] = code;
- tx_size = 3;
-}
-
-static void func_read_bits(bool coils)
-{
- if (read_remains() < 4)
- return report_error(ERR_ILLEGAL_DATA_VALUE);
-
- u16 start = read_u16();
- u16 count = read_u16();
-
- uint bytes = (count+7) / 8;
- if (!body_fits(1 + bytes))
- return report_error(ERR_ILLEGAL_DATA_VALUE);
-
- for (u16 i = 0; i < count; i++)
- if (!(coils ? modbus_check_coil : modbus_check_discrete_input)(start + i))
- return report_error(ERR_ILLEGAL_DATA_ADDRESS);
-
- write_byte(bytes);
- for (u16 i = 0; i < bytes; i++) {
- byte b = 0;
- for (byte j = 0; j < 8 && 8*i + j < count; j++) {
- uint addr = start + 8*i + j;
- if ((coils ? modbus_get_coil : modbus_get_discrete_input)(addr))
- b |= 1 << j;
- }
- write_byte(b);
- }
-}
-
-static void func_read_registers(byte holding)
-{
- if (read_remains() < 4)
- return report_error(ERR_ILLEGAL_DATA_VALUE);
-
- u16 start = read_u16();
- u16 count = read_u16();
-
- uint bytes = 2*count;
- if (!body_fits(1 + bytes))
- return report_error(ERR_ILLEGAL_DATA_VALUE);
-
- for (u16 i = 0; i < count; i++)
- if (!(holding ? modbus_check_holding_register : modbus_check_input_register)(start + i))
- return report_error(ERR_ILLEGAL_DATA_ADDRESS);
-
- // FIXME: Reporting of slave failures?
- write_byte(bytes);
- for (u16 i = 0; i < count; i++)
- write_u16((holding ? modbus_get_holding_register : modbus_get_input_register)(start + i));
-}
-
-static void func_write_single_coil(void)
-{
- if (read_remains() < 4)
- return report_error(ERR_ILLEGAL_DATA_VALUE);
-
- u16 addr = read_u16();
- u16 value = read_u16();
-
- if (!modbus_check_coil(addr))
- return report_error(ERR_ILLEGAL_DATA_ADDRESS);
- if (value != 0x0000 && value != 0xff00)
- return report_error(ERR_ILLEGAL_DATA_VALUE);
-
- modbus_set_coil(addr, value);
-
- write_u16(addr);
- write_u16(value);
-}
-
-static void func_write_single_register(void)
-{
- if (read_remains() < 4)
- return report_error(ERR_ILLEGAL_DATA_VALUE);
-
- u16 addr = read_u16();
- u16 value = read_u16();
-
- if (!modbus_check_holding_register(addr))
- return report_error(ERR_ILLEGAL_DATA_ADDRESS);
-
- modbus_set_holding_register(addr, value);
-
- write_u16(addr);
- write_u16(value);
-}
-
-static void func_write_multiple_coils(void)
-{
- if (read_remains() < 5)
- return report_error(ERR_ILLEGAL_DATA_VALUE);
-
- u16 start = read_u16();
- u16 count = read_u16();
- byte bytes = read_byte();
-
- if (read_remains() < bytes || bytes != (count+7) / 8)
- return report_error(ERR_ILLEGAL_DATA_VALUE);
-
- for (u16 i = 0; i < count; i++)
- if (!modbus_check_coil(start + i))
- return report_error(ERR_ILLEGAL_DATA_ADDRESS);
-
- for (u16 i = 0; i < count; i++)
- modbus_set_coil(start + i, rx_frame[i/8] & (1U << (i%8)));
-
- write_u16(start);
- write_u16(count);
-}
-
-static void func_write_multiple_registers(void)
-{
- if (read_remains() < 5)
- return report_error(ERR_ILLEGAL_DATA_VALUE);
-
- u16 start = read_u16();
- u16 count = read_u16();
- byte bytes = read_byte();
-
- if (read_remains() < bytes || bytes != 2*count)
- return report_error(ERR_ILLEGAL_DATA_VALUE);
-
- for (u16 i = 0; i < count; i++)
- if (!modbus_check_holding_register(start + i))
- return report_error(ERR_ILLEGAL_DATA_ADDRESS);
-
- for (u16 i = 0; i < count; i++)
- modbus_set_holding_register(start + i, read_u16());
-
- write_u16(start);
- write_u16(count);
-}
-
-static void func_mask_write_register(void)
-{
- if (read_remains() < 6)
- return report_error(ERR_ILLEGAL_DATA_VALUE);
-
- u16 addr = read_u16();
- u16 and_mask = read_u16();
- u16 or_mask = read_u16();
-
- if (!modbus_check_holding_register(addr))
- return report_error(ERR_ILLEGAL_DATA_ADDRESS);
-
- u16 reg = modbus_get_holding_register(addr);
- reg = (reg & and_mask) | (or_mask & ~and_mask);
- modbus_set_holding_register(addr, reg);
-
- write_u16(addr);
- write_u16(and_mask);
- write_u16(or_mask);
-}
-
-static void func_read_write_multiple_registers(void)
-{
- if (read_remains() < 9)
- return report_error(ERR_ILLEGAL_DATA_VALUE);
-
- u16 read_start = read_u16();
- u16 read_count = read_u16();
- u16 write_start = read_u16();
- u16 write_count = read_u16();
- byte write_bytes = read_byte();
-
- if (read_remains() < write_bytes || write_bytes != 2*write_count)
- return report_error(ERR_ILLEGAL_DATA_VALUE);
-
- for (u16 i = 0; i < read_count; i++)
- if (!modbus_check_holding_register(read_start + i))
- return report_error(ERR_ILLEGAL_DATA_ADDRESS);
-
- for (u16 i = 0; i < write_count; i++)
- if (!modbus_check_holding_register(write_start + i))
- return report_error(ERR_ILLEGAL_DATA_ADDRESS);
-
- byte read_bytes = 2*write_count;
- if (!body_fits(1 + read_bytes))
- return report_error(ERR_ILLEGAL_DATA_VALUE);
-
- for (u16 i = 0; i < write_count; i++)
- modbus_set_holding_register(write_start + i, read_u16());
-
- write_byte(read_bytes);
- for (u16 i = 0; i < read_count; i++)
- modbus_get_holding_register(read_start + i);
-}
-
-static void func_encapsulated_interface_transport(void)
-{
- if (read_remains() < 3 ||
- read_byte() != 0x0e)
- return report_error(ERR_ILLEGAL_DATA_VALUE);
-
- byte action = read_byte();
- byte id = read_byte();
-
- byte range_min, range_max;
- switch (action) {
- case 1:
- // Streaming access to basic identification
- range_min = MODBUS_ID_VENDOR_NAME;
- range_max = MODBUS_ID_MAJOR_MINOR_REVISION;
- break;
- case 2:
- // Streaming access to regular identification
- range_min = MODBUS_ID_VENDOR_URL;
- range_max = MODBUS_ID_USER_APP_NAME;
- break;
- case 4:
- // Individual access
- if (id >= MODBUS_ID_MAX || !modbus_id_strings[id])
- return report_error(ERR_ILLEGAL_DATA_ADDRESS);
- range_min = range_max = id;
- break;
- default:
- return report_error(ERR_ILLEGAL_DATA_VALUE);
- }
-
- if (action != 4) {
- if (id < range_min || id > range_max)
- id = range_min;
- }
-
- write_byte(0x0e); // Repeat a part of the request
- write_byte(action);
-
- // Conformity level
- if (modbus_id_strings[MODBUS_ID_VENDOR_URL] ||
- modbus_id_strings[MODBUS_ID_PRODUCT_NAME] ||
- modbus_id_strings[MODBUS_ID_USER_APP_NAME])
- write_byte(0x82); // Regular identification, both stream and individual access supported
- else
- write_byte(0x81); // Basic identification only
-
- u16 more_follows_at = tx_size;
- write_byte(0); // More follows: so far not
- write_byte(0); // Next object ID: so far none
- write_byte(0); // Number of objects
-
- for (id = range_min; id <= range_max; id++) {
- if (modbus_id_strings[id]) {
- byte len = strlen(modbus_id_strings[id]);
- byte remains = MODBUS_TX_BUFSIZE - 4 - tx_size; // 2 for CRC, 2 for object header
- if (len > remains) {
- // If it is the only object, cut it
- if (!tx_buf[more_follows_at + 2])
- len = remains;
- else {
- // More follows, report the next ID
- tx_buf[more_follows_at] = 0xff;
- tx_buf[more_follows_at + 1] = id;
- break;
- }
- }
- tx_buf[more_follows_at + 2] ++;
- write_byte(id);
- write_byte(len);
- memcpy(tx_buf + tx_size, modbus_id_strings[id], len);
- tx_size += len;
- }
- }
-}
-
-static void process_frame(void)
-{
- byte func = read_byte();
-
- // Prepare reply frame
- tx_buf[0] = MODBUS_OUR_ADDRESS;
- tx_buf[1] = rx_buf[1];
- tx_size = 2;
- pending_error = 0;
-
- switch (func) {
- case FUNC_READ_COILS:
- func_read_bits(true);
- break;
- case FUNC_READ_DISCRETE_INPUTS:
- func_read_bits(false);
- break;
- case FUNC_READ_HOLDING_REGISTERS:
- func_read_registers(true);
- break;
- case FUNC_READ_INPUT_REGISTERS:
- func_read_registers(false);
- break;
- case FUNC_WRITE_SINGLE_COIL:
- func_write_single_coil();
- break;
- case FUNC_WRITE_SINGLE_REGISTER:
- func_write_single_register();
- break;
- case FUNC_WRITE_MULTIPLE_COILS:
- func_write_multiple_coils();
- break;
- case FUNC_WRITE_MULTIPLE_REGISTERS:
- func_write_multiple_registers();
- break;
- case FUNC_MASK_WRITE_REGISTER:
- func_mask_write_register();
- break;
- case FUNC_READ_WRITE_MULTIPLE_REGISTERS:
- func_read_write_multiple_registers();
- break;
- case FUNC_ENCAPSULATED_INTERFACE_TRANSPORT:
- func_encapsulated_interface_transport();
- break;
- default:
- report_error(ERR_ILLEGAL_FUNCTION);
- }
-
- // Is there a deferred error pending?
- if (pending_error)
- report_error(pending_error);
-
- // Finish reply frame
- write_u16(crc16(tx_buf, tx_size));
-}
-
-void modbus_slave_error(void)
-{
- pending_error = ERR_SLAVE_DEVICE_FAILURE;
-}
+++ /dev/null
-/*
- * Generic MODBUS Library for STM32
- *
- * (c) 2019 Martin Mareš <mj@ucw.cz>
- */
-
-#ifndef _MODBUS_H
-#define _MODBUS_H
-
-void modbus_init(void);
-void modbus_loop(void);
-
-// If a call-back wants to signal a slave error in the reply
-void modbus_slave_error(void);
-
-// Callbacks
-
-bool modbus_check_discrete_input(u16 addr);
-bool modbus_get_discrete_input(u16 addr);
-
-bool modbus_check_coil(u16 addr);
-bool modbus_get_coil(u16 addr);
-void modbus_set_coil(u16 addr, bool value);
-
-bool modbus_check_input_register(u16 addr);
-u16 modbus_get_input_register(u16 addr);
-
-bool modbus_check_holding_register(u16 addr);
-u16 modbus_get_holding_register(u16 addr);
-void modbus_set_holding_register(u16 addr, u16 value);
-
-void modbus_ready_hook(void);
-void modbus_frame_start_hook(void);
-
-enum modbus_id_object {
- MODBUS_ID_VENDOR_NAME, // first three must be always defined
- MODBUS_ID_PRODUCT_CODE,
- MODBUS_ID_MAJOR_MINOR_REVISION,
- MODBUS_ID_VENDOR_URL, // the rest may be NULL
- MODBUS_ID_PRODUCT_NAME,
- MODBUS_ID_USER_APP_NAME,
- MODBUS_ID_MAX,
-};
-
-extern const char * const modbus_id_strings[MODBUS_ID_MAX];
-
-#endif
+++ /dev/null
-/*
- * Debugging Utilities for STM32
- *
- * (c) 2018--2019 Martin Mareš <mj@ucw.cz>
- */
-
-#include "util.h"
-
-#include <libopencm3/stm32/gpio.h>
-#include <libopencm3/stm32/usart.h>
-
-#include <stdarg.h>
-#include <string.h>
-
-/*** Configuration ***/
-
-// You should set the following parameters in config.h
-
-// Use the semi-hosting interface for debugging messages
-// #define DEBUG_SEMIHOSTING
-
-// Use this USART for debugging messages
-// #define DEBUG_USART USART1
-
-// Use this LED for debugging
-#ifdef DEBUG_LED_BLUEPILL
-#define DEBUG_LED_GPIO GPIOC
-#define DEBUG_LED_PIN GPIO13
-#define DEBUG_LED_INVERSE
-#endif
-
-/*** Implementation ***/
-
-#ifdef DEBUG_SEMIHOSTING
-
-void semi_put_char(char c)
-{
- // This is tricky, we need to work around GCC bugs
- volatile char cc = c;
- asm volatile (
- "mov r0, #0x03\n" /* SYS_WRITEC */
- "mov r1, %[msg]\n"
- "bkpt #0xAB\n"
- :
- : [msg] "r" (&cc)
- : "r0", "r1"
- );
-}
-
-void semi_write_string(char *c)
-{
- asm volatile (
- "mov r0, #0x04\n" /* SYS_WRITE0 */
- "mov r1, %[msg]\n"
- "bkpt #0xAB\n"
- :
- : [msg] "r" (c)
- : "r0", "r1"
- );
-}
-
-#endif
-
-void debug_putc(int c)
-{
-#ifdef DEBUG_SEMIHOSTING
- static char debug_buf[128];
- static int debug_i;
- debug_buf[debug_i++] = c;
- if (c == '\n' || debug_i >= sizeof(debug_buf) - 1) {
- debug_buf[debug_i] = 0;
- semi_write_string(debug_buf);
- debug_i = 0;
- }
-#endif
-#ifdef DEBUG_USART
- if (c == '\n')
- usart_send_blocking(DEBUG_USART, '\r');
- usart_send_blocking(DEBUG_USART, c);
-#endif
-}
-
-void debug_flush(void)
-{
-#ifdef DEBUG_USART
- while (!usart_get_flag(DEBUG_USART, USART_FLAG_TC))
- ;
-#endif
-}
-
-void debug_puts(const char *s)
-{
- while (*s)
- debug_putc(*s++);
-}
-
-enum printf_flags {
- PF_ZERO_PAD = 1,
- PF_SIGNED = 2,
- PF_NEGATIVE = 4,
- PF_UPPERCASE = 8,
- PF_LEFT = 16,
-};
-
-static void printf_string(const char *s, uint width, uint flags)
-{
- uint len = strlen(s);
- uint pad = (len < width) ? width - len : 0;
- char pad_char = (flags & PF_ZERO_PAD) ? '0' : ' ';
-
- if (flags & PF_LEFT)
- debug_puts(s);
- while (pad--)
- debug_putc(pad_char);
- if (!(flags & PF_LEFT))
- debug_puts(s);
-}
-
-static void printf_number(uint i, uint width, uint flags, uint base)
-{
- char buf[16];
- char *w = buf + sizeof(buf);
-
- if (flags & PF_SIGNED) {
- if ((int) i < 0) {
- i = - (int) i;
- flags |= PF_NEGATIVE;
- }
- }
-
- *--w = 0;
- do {
- uint digit = i % base;
- if (digit < 10)
- *--w = '0' + digit;
- else
- *--w = ((flags & PF_UPPERCASE) ? 'A' : 'a') + digit - 10;
- i /= base;
- }
- while (i);
-
- if (flags & PF_NEGATIVE)
- *--w = '-';
-
- printf_string(w, width, flags);
-}
-
-void debug_printf(const char *fmt, ...)
-{
- va_list args;
- va_start(args, fmt);
-
- while (*fmt) {
- int c = *fmt++;
- if (c != '%') {
- debug_putc(c);
- continue;
- }
-
- uint width = 0;
- uint flags = 0;
-
- if (*fmt == '-') {
- fmt++;
- flags |= PF_LEFT;
- }
-
- if (*fmt == '0') {
- fmt++;
- flags |= PF_ZERO_PAD;
- }
-
- while (*fmt >= '0' && *fmt <= '9')
- width = 10*width + *fmt++ - '0';
-
- c = *fmt++;
- switch (c) {
- case 'c':
- debug_putc(va_arg(args, int));
- break;
- case 'd':
- printf_number(va_arg(args, int), width, flags | PF_SIGNED, 10);
- break;
- case 'u':
- printf_number(va_arg(args, int), width, flags, 10);
- break;
- case 'X':
- flags |= PF_UPPERCASE;
- // fall-thru
- case 'x':
- printf_number(va_arg(args, int), width, flags, 16);
- break;
- case 's':
- printf_string(va_arg(args, char *), width, flags);
- break;
- default:
- debug_putc(c);
- continue;
- }
- }
-
- va_end(args);
-}
-
-void debug_led(bool light)
-{
-#ifdef DEBUG_LED_GPIO
-#ifdef DEBUG_LED_INVERSE
- light = !light;
-#endif
- if (light)
- gpio_set(DEBUG_LED_GPIO, DEBUG_LED_PIN);
- else
- gpio_clear(DEBUG_LED_GPIO, DEBUG_LED_PIN);
-#endif
-}
-
-void debug_led_toggle(void)
-{
-#ifdef DEBUG_LED_GPIO
- gpio_toggle(DEBUG_LED_GPIO, DEBUG_LED_PIN);
-#endif
-}
+++ /dev/null
-/*
- * General Utility Library for STM32
- *
- * (c) 2018--2019 Martin Mareš <mj@ucw.cz>
- */
-
-#include <stdbool.h>
-#include <stddef.h>
-#include <stdint.h>
-
-#include "config.h"
-
-// Types
-
-typedef unsigned int uint;
-typedef uint8_t byte;
-typedef uint16_t u16;
-typedef int16_t s16;
-typedef uint32_t u32;
-typedef int32_t s32;
-
-// Macros
-
-#define MIN(x,y) ((x) < (y) ? (x) : (y))
-#define MAX(x,y) ((x) > (y) ? (x) : (y))
-#define CLAMP(x,min,max) ({ typeof(x) _t=x; (_t < min) ? min : (_t > max) ? max : _t; })
-#define ARRAY_SIZE(ary) (sizeof(ary)/sizeof((ary)[0]))
-
-#define UNUSED __attribute__((unused))
-
-// Unaligned access to data
-
-static inline uint get_u16_le(byte *p)
-{
- return (p[1] << 8) | p[0];
-}
-
-static inline uint get_u16_be(byte *p)
-{
- return (p[0] << 8) | p[1];
-}
-
-static inline uint get_u32_le(byte *p)
-{
- return (p[3] << 24) | (p[2] << 16) | (p[1] << 8) | p[0];
-}
-
-static inline uint get_u32_be(byte *p)
-{
- return (p[0] << 24) | (p[1] << 16) | (p[2] << 8) | p[3];
-}
-
-static inline void put_u16_le(byte *p, u16 x)
-{
- p[0] = x;
- p[1] = x >> 8;
-}
-
-static inline void put_u16_be(byte *p, u16 x)
-{
- p[0] = x >> 8;
- p[1] = x;
-}
-
-static inline void put_u32_be(byte *p, u32 x)
-{
- p[0] = x >> 24;
- p[1] = (x >> 16) & 0xff;
- p[2] = (x >> 8) & 0xff;
- p[3] = x & 0xff;
-}
-
-static inline void put_u32_le(byte *p, u32 x)
-{
- p[3] = x >> 24;
- p[2] = (x >> 16) & 0xff;
- p[1] = (x >> 8) & 0xff;
- p[0] = x & 0xff;
-}
-
-// CPU instructions not covered by libopencm3
-
-static inline void wait_for_interrupt(void)
-{
- asm volatile ("wfi");
-}
-
-// A compiler memory barrier
-
-static inline void barrier(void)
-{
- asm volatile ("" : : : "memory");
-}
-
-// util-debug.c
-
-void debug_printf(const char *fmt, ...) __attribute__((format(printf,1,2)));
-void debug_puts(const char *s);
-void debug_putc(int c);
-void debug_flush(void);
-
-void debug_led(bool light);
-void debug_led_toggle(void);
+++ /dev/null
-PC=pkg-config
-UCW_CFLAGS := $(shell $(PC) --cflags libucw)
-UCW_LDFLAGS := $(shell $(PC) --libs libucw)
-
-CFLAGS=$(UCW_CFLAGS) -O2 -std=gnu99 -Wall -Wextra -Wno-parentheses -Wstrict-prototypes -Wmissing-prototypes
-LDLIBS=$(UCW_LDFLAGS) -lz
-
-all: dfu-sign
-
-dfu-sign: dfu-sign.c
-
-clean:
- rm -f dfu-sign *.o
+++ /dev/null
-/*
- * Sign firmware for our DFU boot-loader
- *
- * (c) 2020 Martin Mareš <mj@ucw.cz>
- */
-
-#include <ucw/lib.h>
-#include <ucw/opt.h>
-#include <ucw/unaligned.h>
-#include <fcntl.h>
-#include <string.h>
-#include <unistd.h>
-#include <zlib.h>
-
-static char *in_name;
-static char *out_name;
-
-static const struct opt_section options = {
- OPT_ITEMS {
- OPT_HELP("A simple tool for signing firmware for UCW STM32 DFU bootloader."),
- OPT_HELP("Usage: dfu-sign [options] <input> <output>"),
- OPT_STRING(OPT_POSITIONAL(1), NULL, in_name, OPT_REQUIRED, ""),
- OPT_STRING(OPT_POSITIONAL(2), NULL, out_name, OPT_REQUIRED, ""),
- OPT_HELP(""),
- OPT_HELP("Options:"),
- OPT_HELP_OPTION,
- OPT_END
- }
-};
-
-struct fw_header {
- // The header lives in unused space between interrupt vectors
- byte vectors[0x1c];
- u32 length; // Firmware length in bytes, divisible by 4
- // (excluding CRC appended at the end)
- u16 flash_in_progress; // Temporarily non-zero during flashing
- u16 rfu1;
- u32 rfu2;
- u32 rfu3;
-};
-
-struct dfu_trailer {
- u16 fw_version;
- u16 product_id;
- u16 vendor_id;
- u16 dfu_version;
- byte dfu_sig[3];
- byte trailer_len;
- u32 crc; // CRC of the whole file except this field
-};
-
-static byte *firmware;
-static uint firmware_len; // Without CRC and trailer
-static struct fw_header *header;
-static struct dfu_trailer *trailer;
-
-/*** CRC used in DFU ***/
-
-static const u32 crc32_table[256] = {
- 0x00000000, 0x77073096, 0xee0e612c, 0x990951ba, 0x076dc419, 0x706af48f,
- 0xe963a535, 0x9e6495a3, 0x0edb8832, 0x79dcb8a4, 0xe0d5e91e, 0x97d2d988,
- 0x09b64c2b, 0x7eb17cbd, 0xe7b82d07, 0x90bf1d91, 0x1db71064, 0x6ab020f2,
- 0xf3b97148, 0x84be41de, 0x1adad47d, 0x6ddde4eb, 0xf4d4b551, 0x83d385c7,
- 0x136c9856, 0x646ba8c0, 0xfd62f97a, 0x8a65c9ec, 0x14015c4f, 0x63066cd9,
- 0xfa0f3d63, 0x8d080df5, 0x3b6e20c8, 0x4c69105e, 0xd56041e4, 0xa2677172,
- 0x3c03e4d1, 0x4b04d447, 0xd20d85fd, 0xa50ab56b, 0x35b5a8fa, 0x42b2986c,
- 0xdbbbc9d6, 0xacbcf940, 0x32d86ce3, 0x45df5c75, 0xdcd60dcf, 0xabd13d59,
- 0x26d930ac, 0x51de003a, 0xc8d75180, 0xbfd06116, 0x21b4f4b5, 0x56b3c423,
- 0xcfba9599, 0xb8bda50f, 0x2802b89e, 0x5f058808, 0xc60cd9b2, 0xb10be924,
- 0x2f6f7c87, 0x58684c11, 0xc1611dab, 0xb6662d3d, 0x76dc4190, 0x01db7106,
- 0x98d220bc, 0xefd5102a, 0x71b18589, 0x06b6b51f, 0x9fbfe4a5, 0xe8b8d433,
- 0x7807c9a2, 0x0f00f934, 0x9609a88e, 0xe10e9818, 0x7f6a0dbb, 0x086d3d2d,
- 0x91646c97, 0xe6635c01, 0x6b6b51f4, 0x1c6c6162, 0x856530d8, 0xf262004e,
- 0x6c0695ed, 0x1b01a57b, 0x8208f4c1, 0xf50fc457, 0x65b0d9c6, 0x12b7e950,
- 0x8bbeb8ea, 0xfcb9887c, 0x62dd1ddf, 0x15da2d49, 0x8cd37cf3, 0xfbd44c65,
- 0x4db26158, 0x3ab551ce, 0xa3bc0074, 0xd4bb30e2, 0x4adfa541, 0x3dd895d7,
- 0xa4d1c46d, 0xd3d6f4fb, 0x4369e96a, 0x346ed9fc, 0xad678846, 0xda60b8d0,
- 0x44042d73, 0x33031de5, 0xaa0a4c5f, 0xdd0d7cc9, 0x5005713c, 0x270241aa,
- 0xbe0b1010, 0xc90c2086, 0x5768b525, 0x206f85b3, 0xb966d409, 0xce61e49f,
- 0x5edef90e, 0x29d9c998, 0xb0d09822, 0xc7d7a8b4, 0x59b33d17, 0x2eb40d81,
- 0xb7bd5c3b, 0xc0ba6cad, 0xedb88320, 0x9abfb3b6, 0x03b6e20c, 0x74b1d29a,
- 0xead54739, 0x9dd277af, 0x04db2615, 0x73dc1683, 0xe3630b12, 0x94643b84,
- 0x0d6d6a3e, 0x7a6a5aa8, 0xe40ecf0b, 0x9309ff9d, 0x0a00ae27, 0x7d079eb1,
- 0xf00f9344, 0x8708a3d2, 0x1e01f268, 0x6906c2fe, 0xf762575d, 0x806567cb,
- 0x196c3671, 0x6e6b06e7, 0xfed41b76, 0x89d32be0, 0x10da7a5a, 0x67dd4acc,
- 0xf9b9df6f, 0x8ebeeff9, 0x17b7be43, 0x60b08ed5, 0xd6d6a3e8, 0xa1d1937e,
- 0x38d8c2c4, 0x4fdff252, 0xd1bb67f1, 0xa6bc5767, 0x3fb506dd, 0x48b2364b,
- 0xd80d2bda, 0xaf0a1b4c, 0x36034af6, 0x41047a60, 0xdf60efc3, 0xa867df55,
- 0x316e8eef, 0x4669be79, 0xcb61b38c, 0xbc66831a, 0x256fd2a0, 0x5268e236,
- 0xcc0c7795, 0xbb0b4703, 0x220216b9, 0x5505262f, 0xc5ba3bbe, 0xb2bd0b28,
- 0x2bb45a92, 0x5cb36a04, 0xc2d7ffa7, 0xb5d0cf31, 0x2cd99e8b, 0x5bdeae1d,
- 0x9b64c2b0, 0xec63f226, 0x756aa39c, 0x026d930a, 0x9c0906a9, 0xeb0e363f,
- 0x72076785, 0x05005713, 0x95bf4a82, 0xe2b87a14, 0x7bb12bae, 0x0cb61b38,
- 0x92d28e9b, 0xe5d5be0d, 0x7cdcefb7, 0x0bdbdf21, 0x86d3d2d4, 0xf1d4e242,
- 0x68ddb3f8, 0x1fda836e, 0x81be16cd, 0xf6b9265b, 0x6fb077e1, 0x18b74777,
- 0x88085ae6, 0xff0f6a70, 0x66063bca, 0x11010b5c, 0x8f659eff, 0xf862ae69,
- 0x616bffd3, 0x166ccf45, 0xa00ae278, 0xd70dd2ee, 0x4e048354, 0x3903b3c2,
- 0xa7672661, 0xd06016f7, 0x4969474d, 0x3e6e77db, 0xaed16a4a, 0xd9d65adc,
- 0x40df0b66, 0x37d83bf0, 0xa9bcae53, 0xdebb9ec5, 0x47b2cf7f, 0x30b5ffe9,
- 0xbdbdf21c, 0xcabac28a, 0x53b39330, 0x24b4a3a6, 0xbad03605, 0xcdd70693,
- 0x54de5729, 0x23d967bf, 0xb3667a2e, 0xc4614ab8, 0x5d681b02, 0x2a6f2b94,
- 0xb40bbe37, 0xc30c8ea1, 0x5a05df1b, 0x2d02ef8d};
-
-static u32 dfu_update_crc(u32 crc, byte x)
-{
- return crc32_table[(crc ^ x) & 0xff] ^ (crc >> 8);
-}
-
-static u32 dfu_crc(byte *buf, uint len)
-{
- u32 crc = 0xffffffff;
- for (uint i = 0; i < len; i++)
- crc = dfu_update_crc(crc, buf[i]);
- return crc;
-}
-
-/*** CRC implemented in STM32F1 hardware ***/
-
-static const u32 stm_crc_table[256] = {
- 0x00000000, 0x04c11db7, 0x09823b6e, 0x0d4326d9, 0x130476dc, 0x17c56b6b, 0x1a864db2, 0x1e475005,
- 0x2608edb8, 0x22c9f00f, 0x2f8ad6d6, 0x2b4bcb61, 0x350c9b64, 0x31cd86d3, 0x3c8ea00a, 0x384fbdbd,
- 0x4c11db70, 0x48d0c6c7, 0x4593e01e, 0x4152fda9, 0x5f15adac, 0x5bd4b01b, 0x569796c2, 0x52568b75,
- 0x6a1936c8, 0x6ed82b7f, 0x639b0da6, 0x675a1011, 0x791d4014, 0x7ddc5da3, 0x709f7b7a, 0x745e66cd,
- 0x9823b6e0, 0x9ce2ab57, 0x91a18d8e, 0x95609039, 0x8b27c03c, 0x8fe6dd8b, 0x82a5fb52, 0x8664e6e5,
- 0xbe2b5b58, 0xbaea46ef, 0xb7a96036, 0xb3687d81, 0xad2f2d84, 0xa9ee3033, 0xa4ad16ea, 0xa06c0b5d,
- 0xd4326d90, 0xd0f37027, 0xddb056fe, 0xd9714b49, 0xc7361b4c, 0xc3f706fb, 0xceb42022, 0xca753d95,
- 0xf23a8028, 0xf6fb9d9f, 0xfbb8bb46, 0xff79a6f1, 0xe13ef6f4, 0xe5ffeb43, 0xe8bccd9a, 0xec7dd02d,
- 0x34867077, 0x30476dc0, 0x3d044b19, 0x39c556ae, 0x278206ab, 0x23431b1c, 0x2e003dc5, 0x2ac12072,
- 0x128e9dcf, 0x164f8078, 0x1b0ca6a1, 0x1fcdbb16, 0x018aeb13, 0x054bf6a4, 0x0808d07d, 0x0cc9cdca,
- 0x7897ab07, 0x7c56b6b0, 0x71159069, 0x75d48dde, 0x6b93dddb, 0x6f52c06c, 0x6211e6b5, 0x66d0fb02,
- 0x5e9f46bf, 0x5a5e5b08, 0x571d7dd1, 0x53dc6066, 0x4d9b3063, 0x495a2dd4, 0x44190b0d, 0x40d816ba,
- 0xaca5c697, 0xa864db20, 0xa527fdf9, 0xa1e6e04e, 0xbfa1b04b, 0xbb60adfc, 0xb6238b25, 0xb2e29692,
- 0x8aad2b2f, 0x8e6c3698, 0x832f1041, 0x87ee0df6, 0x99a95df3, 0x9d684044, 0x902b669d, 0x94ea7b2a,
- 0xe0b41de7, 0xe4750050, 0xe9362689, 0xedf73b3e, 0xf3b06b3b, 0xf771768c, 0xfa325055, 0xfef34de2,
- 0xc6bcf05f, 0xc27dede8, 0xcf3ecb31, 0xcbffd686, 0xd5b88683, 0xd1799b34, 0xdc3abded, 0xd8fba05a,
- 0x690ce0ee, 0x6dcdfd59, 0x608edb80, 0x644fc637, 0x7a089632, 0x7ec98b85, 0x738aad5c, 0x774bb0eb,
- 0x4f040d56, 0x4bc510e1, 0x46863638, 0x42472b8f, 0x5c007b8a, 0x58c1663d, 0x558240e4, 0x51435d53,
- 0x251d3b9e, 0x21dc2629, 0x2c9f00f0, 0x285e1d47, 0x36194d42, 0x32d850f5, 0x3f9b762c, 0x3b5a6b9b,
- 0x0315d626, 0x07d4cb91, 0x0a97ed48, 0x0e56f0ff, 0x1011a0fa, 0x14d0bd4d, 0x19939b94, 0x1d528623,
- 0xf12f560e, 0xf5ee4bb9, 0xf8ad6d60, 0xfc6c70d7, 0xe22b20d2, 0xe6ea3d65, 0xeba91bbc, 0xef68060b,
- 0xd727bbb6, 0xd3e6a601, 0xdea580d8, 0xda649d6f, 0xc423cd6a, 0xc0e2d0dd, 0xcda1f604, 0xc960ebb3,
- 0xbd3e8d7e, 0xb9ff90c9, 0xb4bcb610, 0xb07daba7, 0xae3afba2, 0xaafbe615, 0xa7b8c0cc, 0xa379dd7b,
- 0x9b3660c6, 0x9ff77d71, 0x92b45ba8, 0x9675461f, 0x8832161a, 0x8cf30bad, 0x81b02d74, 0x857130c3,
- 0x5d8a9099, 0x594b8d2e, 0x5408abf7, 0x50c9b640, 0x4e8ee645, 0x4a4ffbf2, 0x470cdd2b, 0x43cdc09c,
- 0x7b827d21, 0x7f436096, 0x7200464f, 0x76c15bf8, 0x68860bfd, 0x6c47164a, 0x61043093, 0x65c52d24,
- 0x119b4be9, 0x155a565e, 0x18197087, 0x1cd86d30, 0x029f3d35, 0x065e2082, 0x0b1d065b, 0x0fdc1bec,
- 0x3793a651, 0x3352bbe6, 0x3e119d3f, 0x3ad08088, 0x2497d08d, 0x2056cd3a, 0x2d15ebe3, 0x29d4f654,
- 0xc5a92679, 0xc1683bce, 0xcc2b1d17, 0xc8ea00a0, 0xd6ad50a5, 0xd26c4d12, 0xdf2f6bcb, 0xdbee767c,
- 0xe3a1cbc1, 0xe760d676, 0xea23f0af, 0xeee2ed18, 0xf0a5bd1d, 0xf464a0aa, 0xf9278673, 0xfde69bc4,
- 0x89b8fd09, 0x8d79e0be, 0x803ac667, 0x84fbdbd0, 0x9abc8bd5, 0x9e7d9662, 0x933eb0bb, 0x97ffad0c,
- 0xafb010b1, 0xab710d06, 0xa6322bdf, 0xa2f33668, 0xbcb4666d, 0xb8757bda, 0xb5365d03, 0xb1f740b4,
-};
-
-static u32 stm_update_crc(u32 crc, byte x)
-{
- return (crc << 8) ^ stm_crc_table[0xff & ((crc >> 24) ^ x)];
-}
-
-static u32 stm32_crc(byte *buf, uint len)
-{
- u32 crc = 0xffffffff;
- for (uint i = 0; i < len; i += 4) {
- crc = stm_update_crc(crc, buf[i+3]);
- crc = stm_update_crc(crc, buf[i+2]);
- crc = stm_update_crc(crc, buf[i+1]);
- crc = stm_update_crc(crc, buf[i+0]);
- }
- return crc;
-}
-
-static void read_fw(void)
-{
- int fd = open(in_name, O_RDONLY);
- if (fd < 0)
- die("Cannot open %s: %m", in_name);
-
- firmware_len = lseek(fd, 0, SEEK_END);
- lseek(fd, 0, SEEK_SET);
- while (firmware_len % 4)
- firmware_len++;
-
- firmware = xmalloc_zero(firmware_len + 4 + sizeof(struct dfu_trailer));
- header = (struct fw_header *)firmware;
- trailer = (struct dfu_trailer *)(firmware + firmware_len + 4);
-
- if (read(fd, firmware, firmware_len) != (int) firmware_len)
- die("Error reading %s: %m", in_name);
-
- close(fd);
-}
-
-static void build_header_and_crc(void)
-{
- put_u32_le(&header->length, firmware_len);
- header->rfu1 = 0;
- header->rfu2 = 0;
- header->rfu3 = 0;
-
- put_u32_le(firmware + firmware_len, stm32_crc(firmware, firmware_len));
-}
-
-static void build_trailer(void)
-{
- struct dfu_trailer *t = trailer;
-
- t->trailer_len = sizeof(struct dfu_trailer);
- memcpy(t->dfu_sig, "ufd", 3);
- put_u16_le(&t->dfu_version, 0x0100);
- put_u16_le(&t->vendor_id, 0xffff); // fixme
- put_u16_le(&t->product_id, 0xffff);
- put_u16_le(&t->fw_version, 0xffff);
- put_u32_le(&t->crc, dfu_crc(firmware, firmware_len + 4 + t->trailer_len - 4));
-}
-
-static void write_out(void)
-{
- int fd = open(out_name, O_WRONLY | O_CREAT | O_TRUNC, 0666);
- if (fd < 0)
- die("Cannot create %s: %m", out_name);
-
- int len = firmware_len + 4 + sizeof(struct dfu_trailer);
- if (write(fd, firmware, len) != len)
- die("Error writing %s: %m", out_name);
-
- close(fd);
-}
-
-int main(int argc UNUSED, char **argv)
-{
- opt_parse(&options, argv+1);
- read_fw();
- build_header_and_crc();
- build_trailer();
- write_out();
-
- return 0;
-}
projects / home-hw.git / commitdiff