test-dumploader/test.c

   1 #include "util.h"
   2
   3 #include <libopencm3/cm3/cortex.h>
   4 #include <libopencm3/cm3/nvic.h>
   5 #include <libopencm3/cm3/systick.h>
   6 #include <libopencm3/stm32/rcc.h>
   7 #include <libopencm3/stm32/gpio.h>
   8 #include <libopencm3/stm32/usart.h>
   9
  10 static void clock_setup(void)
  11 {
  12         rcc_clock_setup_in_hse_8mhz_out_72mhz();
  13
  14         rcc_periph_clock_enable(RCC_GPIOA);
  15         rcc_periph_clock_enable(RCC_GPIOC);
  16         rcc_periph_clock_enable(RCC_USART1);
  17
  18 #if 0
  19         rcc_periph_reset_pulse(RST_GPIOA);
  20         rcc_periph_reset_pulse(RST_GPIOC);
  21         rcc_periph_reset_pulse(RST_USART1);
  22 #endif
  23 }
  24
  25 static void gpio_setup(void)
  26 {
  27         // PC13 = BluePill LED
  28         gpio_set_mode(GPIOC, GPIO_MODE_OUTPUT_50_MHZ, GPIO_CNF_OUTPUT_PUSHPULL, GPIO13);
  29         gpio_clear(GPIOC, GPIO13);
  30 }
  31
  32 static void usart_setup(void)
  33 {
  34         gpio_set_mode(GPIOA, GPIO_MODE_OUTPUT_50_MHZ, GPIO_CNF_OUTPUT_ALTFN_PUSHPULL, GPIO_USART1_TX);
  35
  36         usart_set_baudrate(USART1, 115200);
  37         usart_set_databits(USART1, 8);
  38         usart_set_stopbits(USART1, USART_STOPBITS_1);
  39         usart_set_mode(USART1, USART_MODE_TX_RX);
  40         usart_set_parity(USART1, USART_PARITY_NONE);
  41         usart_set_flow_control(USART1, USART_FLOWCONTROL_NONE);
  42
  43         usart_enable(USART1);
  44 }
  45
  46 static volatile u32 ms_ticks;
  47
  48 void sys_tick_handler(void)
  49 {
  50         ms_ticks++;
  51 }
  52
  53 static void tick_setup(void)
  54 {
  55         systick_set_frequency(1000, 72000000);
  56         systick_counter_enable();
  57         systick_interrupt_enable();
  58 }
  59
  60 static void delay_ms(uint ms)
  61 {
  62         u32 start_ticks = ms_ticks;
  63         while (ms_ticks - start_ticks < ms)
  64                 ;
  65 }
  66
  67 int main(void)
  68 {
  69         clock_setup();
  70         gpio_setup();
  71         tick_setup();
  72         usart_setup();
  73
  74         for (uint i=0; i<20; i++) {
  75                 delay_ms(100);
  76                 gpio_toggle(GPIOC, GPIO13);
  77         }
  78
  79         for (;;) {
  80                 delay_ms(1000);
  81                 for (uint i=0; i<2048; i++) {
  82                         u32 a = 0x1ffff000 + i;
  83                         if (!(i%32)) {
  84                                 debug_printf("%08x:", a);
  85                                 gpio_toggle(GPIOC, GPIO13);
  86                         }
  87                         debug_printf(" %02x", *(byte *)a);
  88                         if (i%32 == 31)
  89                                 debug_putc('\n');
  90                 }
  91         }
  92
  93         return 0;
  94 }