More fixes, and a bit of SRQ.

1 files changed, 69 insertions, 0 deletions

diff --git a/examples/device/usbtmc/visaQuery.py b/examples/device/usbtmc/visaQuery.py
new file mode 100644
index 000000000..fa3d7f5e8
--- /dev/null
+++ b/examples/device/usbtmc/visaQuery.py
@@ -0,0 +1,69 @@
+import visa
+import time
+import sys
+
+
+def test_idn():
+	idn = inst.query("*idn?");
+	assert idn == "TinyUSB,ModelNumber,SerialNumber,FirmwareVer123456\r\n"
+
+def test_echo():
+	longstr = "0123456789abcdef" * 50
+
+	#Next try echo from 1 to 175 characters (200 is max buffer size on DUT)
+	for i in range(49,175):
+		x = longstr[0:i]
+		xt = x + inst.write_termination
+		y = inst.query(x)
+		assert(xt == y), f"echo {i}"
+
+def test_mav():
+	assert (inst.read_stb() == 0)
+	inst.write("123")
+	time.sleep(0.3)
+	assert (inst.read_stb() & 0x10), "MAV not set after 0.5 seconds"
+	
+	rsp = inst.read()
+	assert(rsp == "123\r\n")
+	
+	
+def test_srq():
+	assert (inst.read_stb() == 0)
+	inst.write("123")
+	
+	#inst.enable_event(visa.constants.VI_EVENT_SERVICE_REQ, visa.constants.VI_QUEUE)
+	#waitrsp = inst.wait_on_event(visa.constants.VI_EVENT_SERVICE_REQ, 5000)
+	#inst.discard_events(visa.constants.VI_EVENT_SERVICE_REQ, visa.constants.VI_QUEUE)
+	#inst.wait_for_srq()
+	time.sleep(0.3)
+	stb = inst.read_stb()
+	msg =  "SRQ not set after 0.5 seconds, was {:02x}".format(stb)
+	assert (stb == 0x50),msg
+
+	assert (inst.read_stb() == 0x10), "SRQ set at second read!"
+	
+	rsp = inst.read()
+	assert(rsp == "123\r\n")
+	
+
+rm = visa.ResourceManager("/c/Windows/system32/visa64.dll")
+reslist = rm.list_resources("USB?::?*::INSTR")
+print(reslist)
+
+if (len(reslist) == 0):
+    sys.exit()
+	
+inst = rm.open_resource(reslist[0]);
+inst.timeout = 3000
+inst.clear()
+
+#print(idn);
+inst.clear()
+
+test_idn()
+test_echo()
+test_mav()
+test_srq()
+
+inst.close()
+print("Test complete")