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Found 10 results

  1. Our team at the moment is trying to determine whether a single, remotely-accessible headless Raspberry Pi 4 could possibly drive two Digital Discovery logic analyzers in parallel(both sampling at the same time) allowing for a total of 64 sampling channels. We would like to receive some insight on whether this implementation could be conducted in a stable and efficient manner based on the hardware and software capabilities of the logic analyzer and Raspberry Pi in combination. If this implementation is possible, would it require two instances of the Waveforms software or could both analyzers operate under a single instance of the software? Finally, in order to utilize the full functionality of the Waveforms software, or at least that which pertains to adjusting and automating the sampling and capturing of signals, is it assumed that the Pi will need to have a GUI in effect? Initially we were looking for an analyzer which could be driven via console commands exclusively, but we can set up the GUI if it is necessary for the Waveforms operation. Any help and clarification would be greatly appreciated. Thank you!
  2. Before buying a Digital Discovery, I decided to try out WaveForms first. But as WaveForms doesn't provide any mock data, I cannot really confirm that my main use case is covered. Suppose I define an 8-bit Bus DIO 0 to DIO 7 and set one of its signals DIO 0 as clock with rising trigger. Does the clock signal become part of the bus value? In other words, if DIO 1 through DIO 7 are constant HIGH and DIO 0 pulses, are the values shown in the data tab hFF or hFE? If the clock signal is included in the bus value (hFF), is there any way to separate the clock signal from the bus?
  3. Hi, I am using Labview to create a pattern generator and logic analyzer on the Analog Discovery Kit using the waveforms sdk dll. At the minute the pattern generator is functioning and I am using it to send data to a second discovery kit to test the logic analyzer. I am having issues acquiring the acquisition data when using the FDwfDigitalInStatusData node, when transmitting 0xFF, I read back 0x6 or 0x9 depending on the trigger position setting. I am only interested in the data after the trigger, I have scourged the internet trying to find a solution with no luck, I have a feeling I am miss using the FDwfDigitalInTriggerPositionSet node, any feedback on what the correct trigger position and reason for incorrect data would be great Data is arriving at 1MHz, the frequency of the analyzer is setup at 2MHz to prevent aliasing Using a 32bit sample format and triggering on a rising edge Single Acquisition Mode with the buffer set anywhere between 100-300 Unsure on placement of trigger position to receive data Thanks Guys, Chris
  4. I've been trying to learn how to use the AD2 Logic Analyser. I got it to work with Serial.println("Hello world!"). I've learned that the Base: selection is critical to capturing the data. If you get it wrong, you get Framing Errors and the wrong characters. Now I am trying to use the Logic Analyser with an Arduino Uno running a clock/date ino that displays on a 16x2 LCD. I do not have the LCD connected, but when I wrote the program it was and it worked perfectly. I have also tried an ino that displays Hello World on the top line of the LCD. My connection is described below. I have tried several different setups in the Logic section of Waveforms and I am not able to capture ascii data. I've tried spi, spi mosi/miso, UART, and a few others. I have also tried to just add Signal lines to the connections below. With that, I am able to see the waveforms, but not the data. Is it possible to read the data with the AD2 and Waveform? The ino notes say to connect the Arduino to the LCD as follows. The number after the dash is the AD2 logic connection wire. I.E. I have a jumper from Arduino Digital pin 12 to AD2 Logic wire 0 and so on. As the LCD is not physically connected. some of the connections in the ino were not used (as noted). * LCD RS pin to digital pin 12 - 0 * LCD Enable pin to digital pin 11 - 1 * LCD D4 pin to digital pin 5 - 2 * LCD D5 pin to digital pin 4 - 3 * LCD D6 pin to digital pin 3 - 4 * LCD D7 pin to digital pin 2 - 5 * LCD R/W pin to ground - (Not Used) * LCD VSS pin to ground - (Not Used) * LCD VCC pin to 5V - (Not Used) I have a jumper from the Android ground to the AD2 Ground. Thanks JohnnyG
  5. Hi Guys, I wanted to check a signal and then when trying to zoom with the mouse wheel I have the behavior showed in the video. Looks like at a specific Zooming the rescale of the screen goes a bit crazy. Thanks in advance The version I'm using is here: 20200420_165752.mp4
  6. Greetings, I am working on a project using the Pattern Generator and Logic Analyzer functions of Analog Discovery 2. I'm trying to figure out the proper arrangements of bits to be assigned to the Pattern Generator so that the Logic Analyzer can receive it in UART format properly. Let's say I want to transmit the word "UART" using the Pattern Generator. Here's how I'm doing it using the Custom Signal setting in the Pattern Generator: The bits highlighted in green are the start and stop bits while those in yellow are the inverted data bits of the word "UART". I also adjusted the Run and Repeat time to only transmit it once. (40/9600 = 0.004166666) I transmitted it to the Logic Analyzer and it was able to receive it using the UART setting. The problem that I see with this is if you want to transmit a single character, you'll need 10 bits for it. For big data, it will take too long to be received by the Logic Analyzer. I was wondering if the Pattern Generator can be set up like this: 1 start bit + (32 Data bits of "UART") + 1 stop bit This reduces the no. of bits by only using the start and stop bits at the beginning and at the end of the data to be transmitted. I tried doing this by rearranging the bits, the run time and repeat settings in the Pattern Generator: The results that I got using the Logic Analyzer became incorrect for the next characters: I'm also trying to do it in VB. Here's the code for it: Imports System.Text Module Module1 Function AD2_UARTCommRead(ByVal hdwf As Integer, ByRef rgData() As Byte, ByVal countOfDataBytes As Integer, ByVal hzRate As Integer, ByVal hzUart As Integer, ByVal pin As Integer, ByRef rgParsed As String, ByRef rgLength As Integer) As Integer 'Customized Uart Decoder Dim pData As Boolean Dim fData As Boolean : fData = True Dim cSamples As Integer : cSamples = rgData.Length Dim rgHex(cSamples) As Byte Dim cSamplePerBit As Integer : cSamplePerBit = hzRate / hzUart 'Decoding Raw Samples into Decimal For i = 0 To cSamples - 1 Dim s As Byte : s = rgData(i) pData = fData fData = 1 And (s >> pin) If pData <> 0 And fData = 0 Then Dim bValue As Integer : bValue = 0 For b = 0 To 7 Dim ii As Double : ii = Math.Round(i + (1.499 + b) * cSamplePerBit) ''''' If ii >= cSamples Then Exit For End If s = rgData(ii) fData = 1 And (s >> pin) If fData Then bValue = bValue + (1 << b) End If Next rgHex(i) = bValue i = i + cSamplePerBit * 9.499 - 1 '1 start + 8 bits + 0.5 stop -1 because For will increment End If Next 'Converting Decimal to ASCII Dim rgString As String For e = 0 To cSamples - 1 If rgHex(e) = 0 Then rgString = rgString Else rgString = rgString + Chr(rgHex(e)) End If Next e rgParsed = rgString rgLength = Len(rgParsed) End Function Function AD2_FDwfDigitalOutDataLong(ByVal Hdwf As Integer, ByVal IdxChannel As Integer, ByRef RgLong As String, ByVal LongBits As Integer) As Integer 'Post Processing Method 'Conversion of ASCII String to Binary Dim Text As String : Text = RgLong Dim n As Integer : n = Len(Text) Dim oReturn As New StringBuilder Dim StartBit As String : StartBit = "0" Dim StopBit As String : StopBit = "1" oReturn.Append(StartBit) For Each Character As Byte In System.Text.ASCIIEncoding.ASCII.GetBytes(Text) oReturn.Append(StrReverse(Convert.ToString(Character, 2).PadLeft(8, "0"))) 'oReturn.Append((Convert.ToString(Character, 2).PadLeft(8, "0"))) Next oReturn.Append(StopBit) Dim Text2 As String : Text2 = (oReturn.ToString) 'Padding of Additional 1s Dim Counter As Integer : Counter = Len(Text2) Dim PadMod As Integer : PadMod = (Counter + (Counter + (Counter Mod 8))) Mod 8 Dim PadBin As String : PadBin = New String("1", PadMod) Text2 = Text2 + PadBin Dim PadResult As Integer : PadResult = Counter + PadMod 'Chunking of Bits into 8 Dim RevBytes(PadResult) As String For e As Integer = 0 To RevBytes.Length - 8 Step 8 RevBytes(e) = Text2.Substring(e, 8) Next e Dim backup As String Dim Extracted(PadResult) As String Dim TxBits(PadResult) As Byte Dim f As Integer, x As Integer Dim lTemp As Integer : lTemp = 0 Dim lngValue As Integer 'Inverting and Conversion of Bits For f = 0 To RevBytes.Length backup = StrReverse(RevBytes(8 * f)) If backup = "" Then Extracted(f) = "0" Extracted(f) = Extracted(f) & backup 'Conversion of Binary to Decimal lngValue = Convert.ToInt32(Extracted(f), 2) TxBits(f) = lngValue lngValue = 0 If TxBits(f) = 0 Then Exit For Next f Call FDwfDigitalOutDataSet(Hdwf, IdxChannel, TxBits, PadResult) End Function Sub Main() Dim hdwf As Long ' 3 = 4th device configuration of AD2 with 16k digital-in/out buffer If FDwfDeviceConfigOpen(-1, 3, hdwf) = False Then Dim szError As String FDwfGetLastErrorMsg(szError) System.Console.WriteLine("Device open failed" & vbCrLf & szError, vbExclamation + vbOKOnly) End End If FDwfDeviceAutoConfigureSet(hdwf, 0) ' only the #Configure functions will apply settings ' UART channels: DIO-0 and DIO-1, h3 = (1 << 0)|(1 << 1) Const nLoop = 744 Const fsDio = &HFFFF Const hzUart = 230400 Const hzRate = hzUart * 1 ''''' Const cSamples = 8 * 4 'RgLong is 4 characters Dim cBuffer As Integer Dim RgLong As String : RgLong = "UART" Dim secRun As Double : secRun = (Len(RgLong) * 8) * (1 / hzUart) Dim phzFreq As Double 'PatGen Parameters - Initialized One Time FDwfDigitalOutInternalClockInfo(hdwf, phzFreq) FDwfDigitalOutRepeatSet(hdwf, 1) FDwfDigitalOutRunSet(hdwf, secRun) 'Enabling DIO-0 FDwfDigitalOutEnableSet(hdwf, 0, 1) FDwfDigitalOutTypeSet(hdwf, 0, 1) FDwfDigitalOutIdleSet(hdwf, 0, 2) FDwfDigitalOutDividerSet(hdwf, 0, (phzFreq / hzUart)) Dim hzDI As Double FDwfDigitalInInternalClockInfo(hdwf, hzDI) FDwfDigitalInTriggerSourceSet(hdwf, trigsrcDetectorDigitalIn) ' 'Falling Edge of any specified channel FDwfDigitalInTriggerSet(hdwf, 0, 0, 0, fsDio) FDwfDigitalInDividerSet(hdwf, hzDI / hzRate) FDwfDigitalInSampleFormatSet(hdwf, 8) FDwfDigitalInBufferSizeInfo(hdwf, cBuffer) If cSamples > cBuffer Then ' FDwfDigitalInAcquisitionModeSet(hdwf, acqmodeRecord) FDwfDigitalInTriggerPrefillSet(hdwf, 0) 'Number of samples after trigger FDwfDigitalInTriggerPositionSet(hdwf, cSamples) 'We are interested only on toggles of the specified channels FDwfDigitalInSampleSensibleSet(hdwf, fsDio) Else FDwfDigitalInBufferSizeSet(hdwf, cSamples) FDwfDigitalInTriggerPositionSet(hdwf, cSamples - 10) End If 'Processing Data for Transmission AD2_FDwfDigitalOutDataLong(hdwf, 0, RgLong, 510) 'Data needs to be tested for 744 times Dim StartTime As Double Dim SecondsElapsed As Double 'Measuring Test Time StartTime = Timer If cSamples <= cBuffer Then ' prime for repeated captures FDwfDigitalInConfigure(hdwf, 1, 1) ' it will rearm for consecutive iterations FDwfDigitalOutConfigure(hdwf, 1) End If For i = 0 To nLoop - 1 Dim rgData(cSamples) As Byte Dim sts As Byte Dim fOverflow As Boolean = False Dim iSample As Integer = 0 If cSamples > cBuffer Then ' record FDwfDigitalInConfigure(hdwf, 1, 1) ' restart is only required for record FDwfDigitalOutConfigure(hdwf, 1) Dim cAvailable As Integer Dim cLost As Integer Dim cCorrupted As Integer While iSample < cSamples If FDwfDigitalInStatus(hdwf, 1, sts) = 0 Then Return End If If sts = DwfStateDone Or sts = DwfStateTriggered Then FDwfDigitalInStatusRecord(hdwf, cAvailable, cLost, cCorrupted) If cLost <> 0 Or cCorrupted <> 0 Then fOverflow = True End If cAvailable = Math.Min(cAvailable, cSamples - iSample) Dim rgTemp(cAvailable) As Byte ' in other programming languages use pass pointer to rgData[iSample] FDwfDigitalInStatusData(hdwf, rgTemp, 1 * cAvailable) For l = 0 To cAvailable - 1 rgData(iSample) = rgTemp(i) iSample += 1 Next End If If sts = DwfStateDone Then Exit While End If End While Else While True If FDwfDigitalInStatus(hdwf, 1, sts) = 0 Then Return End If If sts = DwfStateDone Then Exit While End If End While iSample = rgData.Length FDwfDigitalInStatusData(hdwf, rgData, 1 * rgData.Length) If i < nLoop - 1 Then FDwfDigitalOutConfigure(hdwf, 1) ' start next while processing data below End If End If Dim DIO0Used As Long : DIO0Used = 2 'DIO #2 Dim DIO0Mesg As String : DIO0Mesg = "" Dim DIO0Length As Long AD2_UARTCommRead(hdwf, rgData, (1 * cSamples), hzRate, hzUart, DIO0Used, DIO0Mesg, DIO0Length) Next i '***************************** 'Determine how many seconds code took to run 'Notify user in seconds SecondsElapsed = Math.Round(Timer - StartTime, 6) Console.WriteLine("This code ran successfully in " & SecondsElapsed & " seconds.\n") Console.WriteLine((nLoop) & " x" & (1000 * SecondsElapsed / nLoop) & "ms loop latency:" & (1000 * (SecondsElapsed / nLoop - cSamples / hzRate)) & "ms") FDwfDeviceCloseAll() End Sub End Module Can anyone please explain why this is the case? Any advice will do. Best regards, Lesiastas
  7. Greetings! I'm working on a project involving the use of the AD2's Logic Analyzer Function. I need to receive 510 bytes of data in the shortest time possible. My questions are: 1). Can the Single/Repeated Acquisition Mode of the Logic Analyzer handle 510 bytes of data? - I observed that it can only handle up to 4096 samples and 1 byte of the data I'm handling is 10 bits (1 start bit, 8 data bits, 1 stop bit). So all in all, the Single/Repeated Acquisition Mode can only handle 409 bytes of data. Is there a way to make it capable of handling 510 bytes of data? 2). What is the fastest acquisition mode of the Logic Analyzer Function? - I observed that the Record Mode can handle thousands of data. The downside is it takes a very long time to receive data. Whenever I use the Record Mode, I receive all of the 510 bytes of data. The problem is I end up with 20.5 seconds before the results are displayed and that is too long. 3). What is the best acquisition mode if I want to receive 510 bytes of data as fast as possible? Any advice would really help. Best regards, Lesiastas
  8. Hello, I am working on a project and i am using the digital discovery board. I want to use it to monitor a JTAG interface from another board. My question is, does someone know if there are examples how to do that with the board and with the waveforms software?
  9. Greetings! i'm working on a project involving the use of the Logic Analyzer function of the Analog Discovery 2. I have observed that its Record Mode can be used to capture huge samples of data. The only problem that I'm having is it takes too long for the Record Mode to fill its memory before returning results even when the sample size used is 20k. I would like to know if it is possible to make the Record Mode of the Logic Analyzer intelligent in a way by making it stop filling its memory when the data to be transmitted has already been received. Because the application that I'm using Record Mode for should do so in order to return results faster. Any advice would help a lot. Best regards, Lesiastas
  10. Greetings! I'm working on a project using the Analog Discovery 2. I observed that the Pattern Generator can be used as a Transmitter and the Logic Analyzer can be used as a Receiver, if used properly. Here's the VB Script that I've been working on: AD2_Time_Testing.rar The VB Script does the following: 1). ASCII data is entered. 2). The algorithm in the code will convert it into binary to be transmitted by the Pattern Generator. 3). The Logic Analyzer will receive the bits in Record Mode. 4). The UART decoder algorithm will convert the bits received back into ASCII character. The result that I'm expecting is this: "U" ---> (Converted into Binary) ---> (Transmitted by the Pattern Generator) --> (Bits received in Record Mode) --->(BIts will be converted back in ASCII) ---> "U" The actual result that I'm getting is this: (DIO#0 (Tx) and DIO#2 (Rx) was used) Data that is to be transmitted: I connected DIO #0 to DIO #2 and a UART controller. Data was sucessfully transmitted and it was received by the UART controller: I also observed the bits returned by the FDwfDigitalInStatusData became like this: I think because of this change the UART Decoder algorithm cannot process it properly. That's why I'm getting this result: The output of DIO0Mesg should be "U" as well. Any advice regarding this? Best regards, Lesiastas AD2_Time_Testing.rar
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