added copy of hackrf usb stack

firmware/baseband/sd_over_usb/sd_over_usb.c

@@ -0,0 +1,77 @@
+#include "sd_over_usb.h"
+
+//extern usb_request_handlers_t usb_request_handlers;
+
+
+usb_request_status_t dummy(
+	usb_endpoint_t* const endpoint,
+	const usb_transfer_stage_t stage)
+{
+    (void)(endpoint);
+    (void)(stage);
+	return USB_REQUEST_STATUS_OK;
+}
+
+static usb_request_handler_fn vendor_request_handler[] = {
+	NULL,
+	dummy // USB_WCID_VENDOR_REQ
+};
+
+static const uint32_t vendor_request_handler_count =
+	sizeof(vendor_request_handler) / sizeof(vendor_request_handler[0]);
+
+usb_request_status_t usb_vendor_request(
+	usb_endpoint_t* const endpoint,
+	const usb_transfer_stage_t stage)
+{
+	usb_request_status_t status = USB_REQUEST_STATUS_STALL;
+
+	if (endpoint->setup.request < vendor_request_handler_count) {
+		usb_request_handler_fn handler =
+			vendor_request_handler[endpoint->setup.request];
+		if (handler) {
+			status = handler(endpoint, stage);
+		}
+	}
+
+	return status;
+}
+
+const usb_request_handlers_t usb_request_handlers = {
+	.standard = usb_standard_request,
+	.class = 0,
+	.vendor = usb_vendor_request,
+	.reserved = 0,
+};
+
+
+
+void start_usb(void) {
+	usb_peripheral_reset();
+
+	usb_device_init(0, &usb_device);
+
+	usb_queue_init(&usb_endpoint_control_out_queue);
+	usb_queue_init(&usb_endpoint_control_in_queue);
+	usb_queue_init(&usb_endpoint_bulk_out_queue);
+	usb_queue_init(&usb_endpoint_bulk_in_queue);
+
+	usb_endpoint_init(&usb_endpoint_control_out);
+	usb_endpoint_init(&usb_endpoint_control_in);
+
+	nvic_set_priority(NVIC_USB0_IRQ, 255);
+
+	usb_run(&usb_device);
+
+
+}
+
+
+void stop_usb(void) {
+	usb_peripheral_reset();
+
+}
+
+void irq_usb(void) {
+	usb0_isr();
+}