Src/usbdev.c

   1 #include "stm32f1xx.h"
   2 #include "stm32f1xx_hal.h"
   3
   4 #include "util.h"
   5 #include "usb.h"
   6
   7 /*** Descriptors ***/
   8
   9 #define DESC_U16(x) ((x) & 0xff), ((x) >> 8)
  10
  11 enum desc_string {
  12   DESC_STR_NONE = 0,
  13   DESC_STR_MANUFACTURER,
  14   DESC_STR_PRODUCT,
  15   DESC_STR_SERIAL,
  16   DESC_STR_CONFIGURATION,
  17   DESC_STR_INTERFACE,
  18 };
  19
  20 static const byte desc_device[] = {
  21   18,                           // bLength
  22   USB_DESC_TYPE_DEVICE,         // bDescriptorType
  23   DESC_U16(0x0200),             // bcdUSB
  24   0x00,                         // bDeviceClass
  25   0x00,                         // bDeviceSubClass
  26   0x00,                         // bDeviceProtocol
  27   USB_MAX_EP0_SIZE,             // bMaxPacketSize
  28   DESC_U16(0x4242),             // idVendor
  29   DESC_U16(0x0001),             // idProduct
  30   DESC_U16(0x0200),             // bcdDevice
  31   DESC_STR_MANUFACTURER,        // iManufacturer
  32   DESC_STR_PRODUCT,             // iProduct
  33   DESC_STR_SERIAL,              // iSerialNumber
  34   USB_NUM_CONFIGURATIONS,       // bNumConfigurations
  35 };
  36
  37 static const byte desc_config[] = {
  38   // Configuration descriptor
  39   9,                            // bLength
  40   USB_DESC_TYPE_CONFIGURATION,  // bDescriptorType
  41   32,                           // wTotalLength
  42   0,
  43   0x01,                         // bNumInterfaces
  44   0x01,                         // bConfigurationValue
  45   DESC_STR_CONFIGURATION,       // iConfiguration
  46   0xc0,                         // bmAttributes: bus-powered, supports remote wakeup
  47   0x32,                         // Max power: 100 mA
  48   // Interface descriptor
  49   9,                            // bLength
  50   USB_DESC_TYPE_INTERFACE,      // bDescriptorType
  51   0x00,                         // bInterfaceNumber
  52   0x00,                         // bAlternateSetting
  53   0x02,                         // bNumEndpoints
  54   0xff,                         // bInterfaceClass: vendor-defined
  55   0x00,                         // bInterfaceSubClass
  56   0x00,                         // nInterfaceProtocol
  57   DESC_STR_INTERFACE,           // iInterface
  58   // End-point descriptor
  59   7,                            // bLength
  60   USB_DESC_TYPE_ENDPOINT,       // bDescriptorType
  61   0x01,                         // bEndpointAddress
  62   USB_EP_TYPE_BULK,             // bmAttributes
  63   0x40, 0x00,                   // wMaxPacketSize
  64   0x00,                         // bInterval: unused
  65   // End-point descriptor
  66   7,                            // bLength
  67   USB_DESC_TYPE_ENDPOINT,       // bDescriptorType
  68   0x82,                         // bEndpointAddress
  69   USB_EP_TYPE_BULK,             // bmAttributes
  70   0x40, 0x00,                   // wMaxPacketSize
  71   0x00,                         // bInterval: unused
  72 };
  73
  74 static const char * const desc_string[] = {
  75   NULL,                         // DESC_STR_NONE
  76   "United Computer Wizards",    // DESC_STR_MANUFACTURER
  77   "Mysterious Gadget",          // DESC_STR_PRODUCT
  78   "00000042",                   // DESC_STR_SERIAL
  79   "Default Configuration",      // DESC_STR_CONFIGURATION
  80   "Default Interface",          // DESC_STR_INTERFACE
  81 };
  82
  83 static const byte desc_languages[] = {
  84   4,                            // bLength
  85   USB_DESC_TYPE_STRING,         // bDescriptorType
  86   DESC_U16(1033),               // English
  87 };
  88
  89 /*** Callbacks ***/
  90
  91 static byte usb_rx_buf[64];
  92 static byte usb_tx_buf[64];
  93
  94 void usb_dev_reset(struct usb *usb)
  95 {
  96   usb->desc_device = desc_device;
  97   usb->desc_device_len = sizeof(desc_device);
  98   usb->desc_config = desc_config;
  99   usb->desc_config_len = sizeof(desc_config);
 100   usb->desc_string = desc_string;
 101   usb->desc_string_items = sizeof(desc_string) / sizeof(desc_string[0]);
 102   usb->desc_languages = desc_languages;
 103   usb->desc_languages_len = sizeof(desc_languages);
 104 }
 105
 106 void usb_dev_configure(struct usb *usb)
 107 {
 108   usb_ep_open(usb, 0x01, USB_EP_TYPE_BULK, 64);
 109   usb_ep_open(usb, 0x82, USB_EP_TYPE_BULK, 64);
 110   usb_ep_receive(usb, 0x01, usb_rx_buf, 64);
 111 }
 112
 113 void usb_dev_unconfigure(struct usb *usb)
 114 {
 115   usb_ep_close(usb, 0x01);
 116   usb_ep_close(usb, 0x82);
 117 }
 118
 119 bool usb_dev_setup_hook(struct usb *usb, struct setup_request *setup)
 120 {
 121   return false;
 122 }
 123
 124 void usb_dev_ctl_recv_done(struct usb *usb)
 125 {
 126 }
 127
 128 void usb_dev_ctl_send_done(struct usb *usb)
 129 {
 130 }
 131
 132 void usb_dev_recv_done(struct usb *usb, byte epnum)
 133 {
 134   if (epnum == 0x01)
 135     {
 136       usb_tx_buf[0]++;
 137       usb_ep_send(usb, 0x82, usb_tx_buf, 33);
 138     }
 139 }
 140
 141 void usb_dev_send_done(struct usb *usb, byte epnum)
 142 {
 143   usb_ep_receive(usb, 0x01, usb_rx_buf, 64);
 144 }