Add testcase for EP0 stall recovery to USBTMC test script.

examples/device/usbtmc/visaQuery.py

@@ -1,9 +1,10 @@
+#!/usr/bin/env python3
+
 import visa
 import time
 import sys
 
 
-
 def test_idn():
 	idn = inst.query("*idn?");
 	assert (idn == "TinyUSB,ModelNumber,SerialNumber,FirmwareVer123456\r\n")
@@ -129,6 +130,18 @@ def test_multi_read():
 	assert (x + "\r\n" == y)
 	#inst.chunk_size = old_chunk_size
 	
+def test_stall_ep0():
+	usb_iface = inst.get_visa_attribute(visa.constants.VI_ATTR_USB_INTFC_NUM)
+	inst.read_stb()
+	# This is an invalid request, should create stall.
+	try:
+		retv = inst.control_in(request_type_bitmap_field=0xA1, request_id=60, request_value=0x0000, index=usb_iface, length=0x0001)
+		assert false
+	except visa.VisaIOError:
+		pass
+	
+	assert (inst.read_stb() == 0)
+
 
 rm = visa.ResourceManager("/c/Windows/system32/visa64.dll")
 reslist = rm.list_resources("USB?::?*::INSTR")
@@ -171,6 +184,9 @@ test_echo(165,170)
 print("+ Read timeout (no MAV)")
 test_read_timeout()
 
+print("+ Test EP0 stall recovery")
+test_stall_ep0()
+
 print("+ MAV")
 test_mav()
 

src/portable/st/stm32_fsdev/dcd_stm32_fsdev.c

@@ -418,7 +418,7 @@ static uint16_t dcd_ep_ctr_handler(void)
           uint8_t userMemBuf[8];
           /* Get SETUP Packet*/
           count = pcd_get_ep_rx_cnt(USB, EPindex);
-          if(count == 8) // Setup packet should always be 8 bits. If not, ignore it, and try again.
+          if(count == 8) // Setup packet should always be 8 bytes. If not, ignore it, and try again.
           {
             // Must reset EP to NAK (in case it had been stalling) (though, maybe too late here)
             pcd_set_ep_rx_status(USB,0u,USB_EP_RX_NAK);