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Hi Attila, Thanks. We still need the arm version of 3.22.14 (2024-03-25) for the correct phase adjustment. Yisi

Hi Attila, The 3.22.14 (2024-03-25) solves the problem. Can also upload an arm64.deb version for working on Jetson? Thanks. Yisi

Hi Attilia, I am trying to synchronize an 80Hz clock (from Digital output) and an 80 Hz customized analog waveform (see below). However, I am having an issue introducing a phase between them. While I can shift the phase of the analog signal, its range is much smaller than I expected. Below is the clock signal (yellow) and the analog waveform with different phases (0, 90, 180, 270 degrees), where I was expecting them to spread over one period instead of just ~1/4 period. My code for setting the analog waveform is as below. I tried to introduce the phase difference with FDwfAnalogOutPhaseSet & FDwfAnalogOutNodePhaseSet and had similar results, where "triggerPhase" was set to 0, 90, 180, 270. I wonder if I used the wrong function or if anything wrong with my setting? nRet = dwf.FDwfAnalogOutMasterSet(hdwf, c_int(LG_Chan), c_int(1)); nRet = dwf.FDwfAnalogOutNodeFunctionSet(hdwf, c_int(LG_Chan), c_int(0), funcCustom); nRet = dwf.FDwfAnalogOutNodeFrequencySet(hdwf, c_int(LG_Chan), AnalogOutNodeCarrier, c_double(DACFreq)); # dwf. FDwfAnalogOutTriggerSourceSet(hdwf, c_int(LG_Chan), trigsrcNone) dwf. FDwfAnalogOutTriggerSourceSet(hdwf, c_int(LG_Chan), trigsrcDigitalOut) dwf.FDwfAnalogOutTriggerSlopeSet(hdwf, c_int(LG_Chan), DwfTriggerSlopeRise) nRet = dwf.FDwfAnalogOutNodeDataSet(hdwf, -1, AnalogOutNodeCarrier, DAC, c_int(len(DAC))); nRet = dwf.FDwfAnalogOutNodeAmplitudeSet(hdwf, c_int(LG_Chan), c_int(0), c_double(absmax)); nRet = dwf.FDwfAnalogOutNodeOffsetSet(hdwf, c_int(LG_Chan), c_int(0), c_int(0)); # nRet = dwf.FDwfAnalogOutNodePhaseSet(hdwf, c_int(LG_Chan), c_int(0), c_double(triggerPhase)); nRet = dwf.FDwfAnalogOutPhaseSet(hdwf, c_int(LG_Chan), c_double(triggerPhase)); dwf.FDwfAnalogOutConfigure(hdwf, c_int(LG_Chan), c_int(1)) time.sleep(0.1) dwf.FDwfDigitalOutConfigure(hdwf, c_int(1)) Thanks again for the help. Yisi

Thanks for the response. So you mean I cannot have I2C and Digital Output at the same time. Is there a way to disable I2C after I setup my board so I can turn on Digital output? Which command should I use? The frequency I am trying to generate is 100Hz so the trigger IO is way too fast for me. And I am already using the two analog-out channels for other functions. Best, Yisi

Hi Attilia, I am trying to run I2C (IO 3&4) and have digital output (IO 5&6) as clock together. I tested each function separately and run well (except FDwfDigitalIOOutputEnableSet bahaves oppositely to the reference as in my previous question). Yet, when I put them together, I2C always works but the digital output will stop once there is a I2C write. Below is my code (in python). Also, I want to set IO 6 as low (or high) and wonder if there is simpler way than using pulse as in the code? And I want to set FDwfDigitalOutModeSet to PP but cannot find any reference or sample code on how to do that. Thanks. Yisi # setup digital IO for trigger pattern print("configuring trigger") # enable output for DIO 5, disable 6 so it is low dwf.FDwfDigitalIOOutputEnableSet(hdwf, c_int(0x0000)) # 1<<1 pfsOutputEnable = (c_uint*16)() dwf.FDwfDigitalIOOutputEnableGet(hdwf, byref(pfsOutputEnable)) print("FDwfDigitalIOOutputEnableGet", pfsOutputEnable) # set value on enabled IO pins dwf.FDwfDigitalIOOutputSet(hdwf, c_int(0x0000)) # DIO-5&6 low dwf.FDwfDigitalIOConfigure(hdwf) # dwf.FDwfDigitalOutTriggerSlopeSet(hdwf, c_int(0)) # 0: rise, 1: fall, 2: either # configure and start clock hzSys = c_double() dwf.FDwfDigitalOutInternalClockInfo(hdwf, byref(hzSys)) print("internal frequency: ", hzSys) # 80 Hz pulse on DIO-5 dwf.FDwfDigitalOutEnableSet(hdwf, c_int(5), c_int(1)) # prescaler to double, SystemFrequency/xHz/2 dwf.FDwfDigitalOutDividerSet(hdwf, c_int(5), c_int(int(hzSys.value/80/2))) # 50% duty cycle, 1 tick low, 1 tick high dwf.FDwfDigitalOutCounterSet(hdwf, c_int(5), c_int(1), c_int(1)) dwf.FDwfDigitalOutConfigure(hdwf, c_int(1)) # low Hz pulse on DIO-6 dwf.FDwfDigitalOutEnableSet(hdwf, c_int(6), c_int(1)) # prescaler to double, SystemFrequency/xHz/2 dwf.FDwfDigitalOutDividerSet(hdwf, c_int(6), c_int(int(hzSys.value/80/2))) # 50% duty cycle, 1 tick low, 1 tick high dwf.FDwfDigitalOutCounterSet(hdwf, c_int(6), c_int(1), c_int(0)) dwf.FDwfDigitalOutConfigure(hdwf, c_int(1)) print("IO configured") time.sleep(3) # setup I2C print("Configuring I2C...") iNak = c_int() dwf.FDwfDigitalI2cRateSet(hdwf, c_double(1e5)) # 100kHz dwf.FDwfDigitalI2cSclSet(hdwf, c_int(3)) # SCL = DIO-0 dwf.FDwfDigitalI2cSdaSet(hdwf, c_int(4)) # 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*16)(0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15) rgRX = (c_ubyte*16)() I2C_Addresses = "" I2Cadd = [0xa,0xd,0x44,0x49,0x4a,0x4b] # for i in range(8,119): for i in I2Cadd: # print(c_int(i<<1)) blnCheck = dwf.FDwfDigitalI2cWriteOne(hdwf, c_int(i<<1),None, byref(iNak)) # blnCheck = dwf.FDwfDigitalI2cRead(hdwf, c_int(i<<1), rgRX, c_int(1), byref(iNak)) print(i, blnCheck, iNak) if iNak.value == 0: I2C_Addresses = I2C_Addresses + str(i)+" " print("I2C addresses: ", I2C_Addresses) print("values of output pins: ", dwf.FDwfDigitalIOOutputGet(hdwf, 0x00)) time.sleep(0.1)

Hi Attila, I am using discovery 3 and downloaded the latest version of waveform. I just notice that the python code dwf.FDwfDigitalIOOutputEnableSet(hdwf, c_int(0x00ff)) actually disables pins as output, while c_int(0x00) enables them, which is opposite to what says in the reference. I wonder if I misunderstood anything here? Thanks. Best, Yisi