+
+// measure the USB Speed by sending SpeedTestBufferSize bytes to client and measuring the elapsed time.
+// Note: this mimics GetFromBigbuf(), i.e. we have the overhead of the UsbCommand structure included.
+void printUSBSpeed(uint32_t SpeedTestBufferSize)
+{
+ Dbprintf("USB Speed:");
+ Dbprintf(" Sending %d bytes payload...", SpeedTestBufferSize);
+
+ uint8_t *test_data = BigBuf_get_addr();
+
+ uint32_t start_time = GetTickCount();
+
+ LED_B_ON();
+ for(size_t i=0; i < SpeedTestBufferSize; i += USB_CMD_DATA_SIZE) {
+ size_t len = MIN((SpeedTestBufferSize - i), USB_CMD_DATA_SIZE);
+ cmd_send(CMD_DOWNLOADED_RAW_ADC_SAMPLES_125K,0,len,0,test_data,len);
+ }
+ LED_B_OFF();
+
+ uint32_t end_time = GetTickCount();
+
+ Dbprintf(" Time elapsed: %dms, USB Transfer Speed PM3 -> Client = %d Bytes/s",
+ end_time - start_time,
+ 1000* SpeedTestBufferSize / (end_time - start_time));
+
+}
+