I’m running Windows 10 and Pycharm 2020.3 (a python IDE) & using Neurofield64 which is software that allows the control of various Neurofield eeg recording and stimulation devices, which work using a PEAK USB/CAN adapter. A Neurofield Z3 is a tACS/tDCS/tRNS brain stimulation device. I want to be able to directly control a Z3 from my Python code.
So, using PCAN Explorer 6, I traced Neurofield64 running a Z3 protocol, which got the Z3 to produce a range of stimulation over time. While the Neurofield64 Z3 protocol was running, I monitored the output of the Z3 using a Picoscope desktop oscilloscope, so I can see that the Z3 is producing expected signals.
I exported the trace as a csv in PCAN Explorer the first line of which is here :
Index Time Offset [ms] Bus CAN-ID (hex) Symbol Rx/Tx Type Length Data
1 20892.54 1 610901 Rx Data 8 00 00 00 80 00 00 00 00
If I replay the traced recording of the Neurofield64 protocol within PCAN Explorer 6, I get the same results from the Z3 as I do running the original Neurofield64 Z3 protocol. I can see this from the output of the Picoscope.
If I attempt to send a single line of the same trace data, as a message containing the CAN-ID & the data in a simple Python program (see below) I see a different CAN-ID (x101) and it appears the message does not get to the Z3:
Time Offset [ms] Bus CAN-ID (hex) Symbol Rx/Tx Type Length Data
1 797788.8 1 101 Rx Data 8 00 00 00 80 00 00 00 00
Any idea what I’m doing wrong?
Thanks
Rob
Code: Select all
from PCANBasic import *
channel = PCAN_USBBUS1
baud = PCAN_BAUD_500K
## The Plug & Play Channel (PCAN-USB) is initialized
##
#objPCAN =# The Plug & Play Channel (PCAN-USB) is initialized
#
objPCAN = PCANBasic()
result = objPCAN.Initialize(channel, baud)
if result != PCAN_ERROR_OK:
# An error occured, get a text describing the error and show it
#
result = objPCAN.GetErrorText(result)
print(result[1])
channel = PCAN_USBBUS2
objPCAN = PCANBasic()
result = objPCAN.Initialize(channel, baud)
if result != PCAN_ERROR_OK:
# An error occured, get a text describing the error and show it
#
result = objPCAN.GetErrorText(result)
print(result[1])
else:
print("PCAN-USBx was initialized")
else:
print("PCAN-USBx was initialized")
# Check the status of the USB Channel
#
result = objPCAN.GetStatus(channel)
if result == PCAN_ERROR_BUSLIGHT:
print("PCAN-USB (Ch-x): Handling a BUS-LIGHT status...")
elif result == PCAN_ERROR_BUSHEAVY:
print("PCAN-USB (Ch-x): Handling a BUS-HEAVY status...")
elif result == PCAN_ERROR_BUSOFF:
print("PCAN-USB (Ch-x): Handling a BUS-OFF status...")
elif result == PCAN_ERROR_OK:
print("PCAN_USB (Ch-x): Status is OK")
else:
# An error occured, get a text describing the error and show it
#
result = objPCAN.GetErrorText(result)
print(result[1])
msg = TPCANMsg()
msg.ID = 0x610901
msg.MSGTYPE = PCAN_MESSAGE_STANDARD
msg.LEN = 8
msg.DATA[0] = 0x00
msg.DATA[1] = 0x00
msg.DATA[2] = 0x00
msg.DATA[3] = 0x80
msg.DATA[4] = 0x00
msg.DATA[5] = 0x00
msg.DATA[6] = 0x00
msg.DATA[7] = 0x00
#
result = objPCAN.Write(channel, msg)
if result != PCAN_ERROR_OK:
# An error occured, get a text describing the error and show it
#
result = objPCAN.GetErrorText(result)
print(result)
else:
print("Message sent successfully")
# All initialized channgels are released
#
result = objPCAN.Uninitialize(PCAN_NONEBUS)
if result != PCAN_ERROR_OK:
# An error occured, get a text describing the error and show it
#
result = objPCAN.GetErrorText(result)
print(result)
else:
print("PCAN-USBx was UN-initialized")
