Joao Paulo

Hi, I was trying to modify the example test_I2C_CLS-TMP2.py( https://github.com/Digilent/WaveForms-SDK-Getting-Started-PY) to read LM75A from NXP, but I could not get rid of this error. I checked i2c address ( 0x48 7bits or 0x90 bits). I also tried with both here is the code not working: from WF_SDK import device, supplies # import instruments from WF_SDK.protocol import i2c # import protocol instrument from time import sleep # needed for delays device_name = "Analog Discovery 3" """-----------------------------------------------------------------------""" # connect to the device device_data = device.open() device_data.name = device_name """-----------------------------------""" # define i2c addresses TMP2_address = 0x48 # initialize the i2c interface on DIO0 and DIO1 i2c.open(device_data, sda=1, scl=0) try: # repeat while True: # read the temperature message, error = i2c.read(device_data, 2, TMP2_address) # read 2 bytes value = (int(message[0]) << 8) | int(message[1]) # create integer from received bytes print(value/256.0) # delay 1s sleep(1) except KeyboardInterrupt: # exit on Ctrl+C pass # reset the interface i2c.close(device_data) # stop and reset the power supplies supplies_data.master_state = False supplies.switch(device_data, supplies_data) supplies.close(device_data) """-----------------------------------""" # close the connection device.close(device_data) In the Waveforms, it was fine. Also, I tried the test_temperature.py and it runs fine too. Then I modified the Digital_i2c.py and it worked fine. Here is the working code. I know it works but I would prefer to use the nice ready modules already written. Any ideas? """ DWF Python Example Author: Digilent, Inc. Revision: 2018-07-23 Requires: Python 2.7, 3 """ from ctypes import * import math import sys import time import struct if sys.platform.startswith("win"): dwf = cdll.LoadLibrary("dwf.dll") elif sys.platform.startswith("darwin"): dwf = cdll.LoadLibrary("/Library/Frameworks/dwf.framework/dwf") else: dwf = cdll.LoadLibrary("libdwf.so") hdwf = c_int() print("Opening first device") #dwf.FDwfDeviceOpen(c_int(-1), byref(hdwf)) # device configuration of index 3 (4th) for Analog Discovery has 16kS digital-in/out buffer dwf.FDwfDeviceConfigOpen(c_int(-1), c_int(3), byref(hdwf)) if hdwf.value == 0: print("failed to open device") szerr = create_string_buffer(512) dwf.FDwfGetLastErrorMsg(szerr) print(str(szerr.value)) quit() print("Configuring I2C...") iNak = c_int() dwf.FDwfDigitalI2cRateSet(hdwf, c_double(1e5)) # 100kHz dwf.FDwfDigitalI2cSclSet(hdwf, c_int(0)) # SCL = DIO-0 dwf.FDwfDigitalI2cSdaSet(hdwf, c_int(1)) # SDA = DIO-1 dwf.FDwfDigitalI2cClear(hdwf, byref(iNak)) if iNak.value == 0: print("I2C bus error. Check the pull-ups.") quit() time.sleep(1) rgTX = (c_ubyte*1)(0) rgRX = (c_ubyte*2)() while True: #print("Write and Read with reStart:") dwf.FDwfDigitalI2cWriteRead(hdwf, c_int(0x48<<1), rgTX, c_int(1), rgRX, c_int(2), byref(iNak)) # write 1 byte restart and read 16 bytes if iNak.value != 0: print("NAK "+str(iNak.value)) print(list(rgRX)) # Convert temperature data to Celsius raw_temperature = struct.unpack('>h', bytes(rgRX))[0] temperature_celsius = raw_temperature / 256.0 print(temperature_celsius) time.sleep(1) dwf.FDwfDeviceCloseAll()

@Kenechukwu Aniagboso Hi, Where you read VCC, hook up the red wire of your AD2 ( analog dicovery 2). Don't forget to attach the GND to the black wire. Attaching the red wire to the pin 2 of the connector is also an option

Hi, I have a small problem with I2C master tab. I am at waveforms 3.17.1 and I am trying to use the protocol tab with DD device. My intent is to read an address on a device, which is 16bits wide address. It happens that I can only read the first address 0000h. Even if I change the SubAddress to 0001h, it will still read 0000h. I made it work in the custom tab, but not in this. Is it supposed to be this way? Thanks,

Hi @Kristoff At the time I abandoned my OpenScope because I could not use it anymore. Then, I found it here again and wanted to try again to bring it to life. I am not sure if the project already ended or so. here is what did, but I do not know if it is important anymore. It connects to Wi-Fi and before I programmed the firmware with a PicKit ( the version is in the log ). I am able to go on with it now :) openscope_wifi.txt

Hi, I had the same problem and can't get past "error connecting / make sure the agent is running" message. That trick I quote worked, but it's strange because I was normally using my OS and then it stopped working and I had to do this workaround. I'm attaching dxdiag report so you have more in hands if you try to figure out what's going on. By the way, my OS does not connect to Wi-Fi anymore, I can select a network, set its password, but no connection is set... Thanks DxDiag.txt