1 files changed, 99 insertions, 0 deletions
diff --git a/app/usb.c b/app/usb.c
new file mode 100644
index 0000000..053f126
--- /dev/null
+++ b/app/usb.c
@@ -0,0 +1,99 @@
+#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 = USB_CLASS_CDC,
+  .bDeviceSubClass = 0,
+  .bDeviceProtocol = 0,
+  .bMaxPacketSize0 = 64,
+  .idVendor = ID_VENDOR,
+  .idProduct = ID_PRODUCT,
+  .bcdDevice = 0x0200,
+  .iManufacturer = 1,
+  .iProduct = 2,
+  .iSerialNumber = 3,
+  .bNumConfigurations = 1,
+};
+
+
+static const struct usb_interface ifaces[] = {
+  {
+    .num_altsetting = 1,
+    .altsetting = &comm_iface,
+  },
+  {
+    .num_altsetting = 1,
+    .altsetting = &data_iface,
+  },
+  {
+    .num_altsetting = 1,
+    .altsetting = &dfu_iface,
+  },
+};
+
+static const struct usb_config_descriptor config = {
+  .bLength = USB_DT_CONFIGURATION_SIZE,
+  .bDescriptorType = USB_DT_CONFIGURATION,
+  .wTotalLength = 0,
+  .bNumInterfaces = 3,
+  .bConfigurationValue = 1,
+  .iConfiguration = 0,
+  .bmAttributes = 0x80,
+  .bMaxPower = 0x32,
+  .interface = ifaces,
+};
+
+static const char *usb_strings[] = {
+  VENDOR_NAME,
+  PRODUCT_NAME,
+  SERIAL_NUMBER,
+  "DFU",
+};
+
+void otg_fs_isr (void)
+{
+  usbd_poll (usb_device);
+}
+
+
+
+
+void  usb_init (void)
+{
+  MAP_AF_100 (USB_DP, GPIO_AF10);
+  MAP_AF_100 (USB_DM, GPIO_AF10);
+
+
+  usb_device = usbd_init (&otgfs_usb_driver,
+                          &dev,
+                          &config,
+                          usb_strings,
+                          4,
+                          usbd_control_buffer,
+                          sizeof (usbd_control_buffer));
+
+  /* Disable VBUS sensing */
+
+  OTG_FS_GCCFG |= OTG_GCCFG_NOVBUSSENS;
+  OTG_FS_GCCFG &= ~OTG_GCCFG_VBUSASEN;
+  OTG_FS_GCCFG &= ~OTG_GCCFG_VBUSBSEN;
+
+  usbd_register_set_config_callback (usb_device, cdcacm_set_config);
+
+
+  nvic_enable_irq (NVIC_OTG_FS_IRQ);
+
+}
+
+