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Add Linux support to tmc example

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Replaces visa include with pyvisa, as visa use with PyVISA is being
deprecated.
This commit is contained in:
Jeremiah McCarthy 2021-03-16 17:04:40 -04:00
parent 62d4652f86
commit dc2f00cca1
1 changed files with 23 additions and 15 deletions
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38
examples/device/usbtmc/visaQuery.py
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@ -1,6 +1,6 @@
#!/usr/bin/env python3 #!/usr/bin/env python3
import visa import pyvisa as visa
import time import time
import sys import sys
@ -36,8 +36,8 @@ def test_trig():
time.sleep(0.3) # SRQ may have some delay time.sleep(0.3) # SRQ may have some delay
assert (inst.read_stb() & 0x40), "SRQ not set after 0.3 seconds" assert (inst.read_stb() & 0x40), "SRQ not set after 0.3 seconds"
assert (inst.read_stb() == 0) assert (inst.read_stb() == 0)
def test_mav(): def test_mav():
inst.write("delay 50") inst.write("delay 50")
inst.read_stb() # clear STB inst.read_stb() # clear STB
@ -45,15 +45,15 @@ def test_mav():
inst.write("123") inst.write("123")
time.sleep(0.3) time.sleep(0.3)
assert (inst.read_stb() & 0x10), "MAV not set after 0.5 seconds" assert (inst.read_stb() & 0x10), "MAV not set after 0.5 seconds"
rsp = inst.read() rsp = inst.read()
assert(rsp == "123\r\n") assert(rsp == "123\r\n")
def test_srq(): def test_srq():
assert (inst.read_stb() == 0) assert (inst.read_stb() == 0)
inst.write("123") inst.write("123")
#inst.enable_event(visa.constants.VI_EVENT_SERVICE_REQ, visa.constants.VI_QUEUE) #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) #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.discard_events(visa.constants.VI_EVENT_SERVICE_REQ, visa.constants.VI_QUEUE)
@ -64,7 +64,7 @@ def test_srq():
assert (stb == 0x50),msg assert (stb == 0x50),msg
assert (inst.read_stb() == 0x10), "SRQ set at second read!" assert (inst.read_stb() == 0x10), "SRQ set at second read!"
rsp = inst.read() rsp = inst.read()
assert(rsp == "123\r\n") assert(rsp == "123\r\n")
@ -110,14 +110,14 @@ def test_abort_in():
inst.timeout = 800 inst.timeout = 800
y = inst.read() y = inst.read()
assert(y == "xxx\r\n") assert(y == "xxx\r\n")
def test_indicate(): def test_indicate():
# perform indicator pulse # perform indicator pulse
usb_iface = inst.get_visa_attribute(visa.constants.VI_ATTR_USB_INTFC_NUM) usb_iface = inst.get_visa_attribute(visa.constants.VI_ATTR_USB_INTFC_NUM)
retv = inst.control_in(request_type_bitmap_field=0xA1, request_id=64, request_value=0x0000, index=usb_iface, length=0x0001) retv = inst.control_in(request_type_bitmap_field=0xA1, request_id=64, request_value=0x0000, index=usb_iface, length=0x0001)
assert((retv[1] == visa.constants.StatusCode(0)) and (retv[0] == b'\x01')), f"indicator pulse failed: retv={retv}" assert((retv[1] == visa.constants.StatusCode(0)) and (retv[0] == b'\x01')), f"indicator pulse failed: retv={retv}"
def test_multi_read(): def test_multi_read():
old_chunk_size = inst.chunk_size old_chunk_size = inst.chunk_size
longstr = "0123456789abcdefghijklmnopqrstuvwxyz" * 10 longstr = "0123456789abcdefghijklmnopqrstuvwxyz" * 10
@ -129,7 +129,7 @@ def test_multi_read():
y = inst.read() y = inst.read()
assert (x + "\r\n" == y) assert (x + "\r\n" == y)
#inst.chunk_size = old_chunk_size #inst.chunk_size = old_chunk_size
def test_stall_ep0(): def test_stall_ep0():
usb_iface = inst.get_visa_attribute(visa.constants.VI_ATTR_USB_INTFC_NUM) usb_iface = inst.get_visa_attribute(visa.constants.VI_ATTR_USB_INTFC_NUM)
inst.read_stb() inst.read_stb()
@ -139,17 +139,25 @@ def test_stall_ep0():
assert false assert false
except visa.VisaIOError: except visa.VisaIOError:
pass pass
assert (inst.read_stb() == 0) assert (inst.read_stb() == 0)
os = sys.platform
if os == "linux" or os == "linux2":
rm = visa.ResourceManager("@py")
elif os == "darwin":
## Not tested
print("Mac not tested\n");
sys.exit()
elif os == "win32":
rm = visa.ResourceManager("/c/Windows/system32/visa64.dll")
rm = visa.ResourceManager("/c/Windows/system32/visa64.dll")
reslist = rm.list_resources("USB?::?*::INSTR") reslist = rm.list_resources("USB?::?*::INSTR")
print(reslist) print(reslist)
if (len(reslist) == 0): if (len(reslist) == 0):
sys.exit() sys.exit()
inst = rm.open_resource(reslist[0]); inst = rm.open_resource(reslist[0]);
inst.timeout = 3000 inst.timeout = 3000