From 49148e76706e5e24c2ba7f6ccc1d7ec4736ab2f3 Mon Sep 17 00:00:00 2001
From: root <root@ka-ata-killa.ourano.james.local>
Date: Wed, 3 Mar 2021 15:24:13 +0000
Subject: support cheap chinese blue pill boards, make usb dfu compatible with
 dfuse

---
 app/usb.c | 139 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 139 insertions(+)
 create mode 100644 app/usb.c

(limited to 'app/usb.c')

diff --git a/app/usb.c b/app/usb.c
new file mode 100644
index 0000000..8023ea3
--- /dev/null
+++ b/app/usb.c
@@ -0,0 +1,139 @@
+#include "project.h"
+
+#define USB_DM GPIO11
+#define USB_DM_PORT GPIOA
+#define USB_DP GPIO12
+#define USB_DP_PORT GPIOA
+
+/* Buffer to be used for control requests. */
+uint8_t usbd_control_buffer[128];
+usbd_device *usb_device;
+
+static const struct usb_device_descriptor dev = {
+  .bLength = USB_DT_DEVICE_SIZE,
+  .bDescriptorType = USB_DT_DEVICE,
+  .bcdUSB = 0x0200,
+  .bDeviceClass = 0xef,
+  .bDeviceSubClass = 0x02,
+  .bDeviceProtocol = 0x01,
+  .bMaxPacketSize0 = 64,
+  .idVendor = 0x0483,
+  .idProduct = 0xff03,
+  .bcdDevice = 0x0200,
+  .iManufacturer = 1,
+  .iProduct = 2,
+  .iSerialNumber = 3,
+  .bNumConfigurations = 1,
+};
+
+
+static const struct usb_interface ifaces[] = {
+  {
+    .num_altsetting = 1,
+    .altsetting = &dummy_kb_iface,
+    .iface_assoc = &dummy_kb_iface_assoc,
+  },
+  {
+    .num_altsetting = 1,
+    .altsetting = &dfu_iface,
+    .iface_assoc = &dfu_iface_assoc,
+  },
+  {
+    .num_altsetting = 1,
+    .altsetting = &comm_iface,
+    .iface_assoc = &cdc_iface_assoc,
+  },
+  {
+    .num_altsetting = 1,
+    .altsetting = &data_iface,
+  },
+};
+
+static const struct usb_config_descriptor config = {
+  .bLength = USB_DT_CONFIGURATION_SIZE,
+  .bDescriptorType = USB_DT_CONFIGURATION,
+  .wTotalLength = 0,
+  .bNumInterfaces = 4,
+  .bConfigurationValue = 1,
+  .iConfiguration = 0,
+  .bmAttributes = 0x80,
+  .bMaxPower = 0x32,
+  .interface = ifaces,
+};
+
+static const char *usb_strings[] = {
+  VENDOR_NAME, /*1*/
+  PRODUCT_NAME, /*2*/
+  SERIAL_NUMBER, /*3*/
+  "dummy device", /*4*/
+  "DFU interface", /*5*/
+  "Debug interface", /*6*/
+};
+#define N_USB_STRINGS  (sizeof(usb_strings)/sizeof(usb_strings[0]))
+
+void usb_hp_can_tx_isr (void)
+{
+  usbd_poll (usb_device);
+}
+
+void usb_lp_can_rx0_isr (void)
+{
+  usbd_poll (usb_device);
+}
+
+static int control_request (usbd_device *usbd_dev,
+                            struct usb_setup_data *req,
+                            uint8_t **buf,
+                            uint16_t *len,
+                            usbd_control_complete_callback *complete)
+{
+  if (dfu_control_request (usbd_dev, req, buf, len, complete))
+    return 1;
+
+  return cdcacm_control_request (usbd_dev, req, buf, len, complete);
+}
+
+static void set_config (usbd_device *usbd_dev, uint16_t wValue)
+{
+
+  cdcacm_set_config (usbd_dev, wValue);
+
+  usbd_register_control_callback (usbd_dev,
+                                  USB_REQ_TYPE_CLASS | USB_REQ_TYPE_INTERFACE,
+                                  USB_REQ_TYPE_TYPE | USB_REQ_TYPE_RECIPIENT,
+                                  control_request);
+
+}
+
+
+
+void  usb_init (void)
+{
+  /*Force USB reset */
+  gpio_set_mode (GPIOA, GPIO_MODE_OUTPUT_50_MHZ, GPIO_CNF_OUTPUT_PUSHPULL, GPIO12);
+  gpio_set_mode (GPIOA, GPIO_MODE_OUTPUT_50_MHZ, GPIO_CNF_OUTPUT_PUSHPULL, GPIO13);
+  gpio_clear (GPIOA, GPIO12);
+  gpio_clear (GPIOA, GPIO13);
+  delay_us (50000);
+  gpio_set_mode (GPIOA, GPIO_MODE_INPUT, GPIO_CNF_INPUT_FLOAT, GPIO12);
+  gpio_set_mode (GPIOA, GPIO_MODE_INPUT, GPIO_CNF_INPUT_FLOAT, GPIO13);
+
+
+  usb_device = usbd_init (&stm32f103_usb_driver,
+                          &dev,
+                          &config,
+                          usb_strings,
+                          N_USB_STRINGS,
+                          usbd_control_buffer,
+                          sizeof (usbd_control_buffer));
+
+  usbd_register_set_config_callback (usb_device, set_config);
+
+  nvic_enable_irq (NVIC_USB_HP_CAN_TX_IRQ);
+  nvic_enable_irq (NVIC_USB_LP_CAN_RX0_IRQ);
+
+
+
+}
+
+
-- 
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