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#include "project.h"
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 = 1024,
.bcdDFUVersion = 0x011A,
};
const struct usb_interface_descriptor dfu_iface = {
.bLength = USB_DT_INTERFACE_SIZE,
.bDescriptorType = USB_DT_INTERFACE,
.bInterfaceNumber = 1,
.bAlternateSetting = 0,
.bNumEndpoints = 0,
.bInterfaceClass = 0xFE,
.bInterfaceSubClass = 1,
.bInterfaceProtocol = 1,
.iInterface = 4,
.extra = &dfu_function,
.extralen = sizeof (dfu_function),
};
const struct usb_iface_assoc_descriptor dfu_iface_assoc = {
.bLength = USB_DT_INTERFACE_ASSOCIATION_SIZE,
.bDescriptorType = USB_DT_INTERFACE_ASSOCIATION,
.bFirstInterface = 1,
.bInterfaceCount = 1,
.bFunctionClass = 0xfe,
.bFunctionSubClass = 1,
.bFunctionProtocol = 1,
.iFunction = 5,
};
static void
dfu_detach_complete (usbd_device *usbd_dev, struct usb_setup_data *req)
{
(void) req;
(void) usbd_dev;
dfu_flag = 0xfee1dead;
scb_reset_core();
}
enum usbd_request_return_codes
dfu_control_request (usbd_device *usbd_dev, struct usb_setup_data *req,
uint8_t **buf, uint16_t *len,
usbd_control_complete_callback *complete) {
(void) buf;
(void) len;
(void) usbd_dev;
if ((req->bmRequestType & 0x7F) != 0x21)
return USBD_REQ_NEXT_CALLBACK;
switch (req->bRequest)
{
case DFU_GETSTATUS: {
(*buf) [0] = DFU_STATUS_OK;
(*buf) [1] = 0;
(*buf) [2] = 0;
(*buf) [3] = 0;
(*buf) [4] = STATE_APP_IDLE;
(*buf) [5] = 0; /* iString not used here */
*len = 6;
return USBD_REQ_HANDLED;
}
case DFU_GETSTATE:
/* Return state with no state transision. */
*buf[0] = STATE_APP_IDLE;
*len = 1;
return USBD_REQ_HANDLED;
case DFU_DETACH:
*complete = dfu_detach_complete;
return USBD_REQ_HANDLED;
}
return USBD_REQ_NEXT_CALLBACK;
}
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