Can I send data via uart from Analog Discovery 2?

[kaamil1984]

Hi guys,

I'm messing around with some modem and I have lost FTDI uart to usb converter.

Can I use WaveForms and Analog Discovery 2 to send uart data somehow without bit-banging digital out?

If its possible - maybe someone has script example?

Edited October 4, 2021 by kaamil1984

[attila]

Hi @kaamil1984

Depending on your requirements you can use:

1. WaveForms application/ Protocol/ UART interface

2. WF app Script tool, see the following example:

3. WF SDK, see manual and examples/ py/ Digital_Uart.py

[kaamil1984]

Thank you. This is what I needed:

dwf.FDwfDigitalUartTx(hdwf, rgTX, c_int(sizeof(rgTX)-1)) # send text, trim zero ending

 

Line above is from this example (

Digilent\WaveFormsSDK\samples\py\Digital_Uart.py

 

"""
   DWF Python Example
   Author:  Digilent, Inc.
   Revision:  2018-07-23

   Requires:                       
       Python 2.7, 3
"""

from ctypes import *
import math
import sys
import time

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 UART...")

cRX = c_int(0)
fParity = c_int(0)

# configure the I2C/TWI, default settings
dwf.FDwfDigitalUartRateSet(hdwf, c_double(9600)) # 9.6kHz
dwf.FDwfDigitalUartTxSet(hdwf, c_int(0)) # TX = DIO-0
dwf.FDwfDigitalUartRxSet(hdwf, c_int(1)) # RX = DIO-1
dwf.FDwfDigitalUartBitsSet(hdwf, c_int(8)) # 8 bits
dwf.FDwfDigitalUartParitySet(hdwf, c_int(0)) # 0 none, 1 odd, 2 even
dwf.FDwfDigitalUartStopSet(hdwf, c_double(1)) # 1 bit stop length

dwf.FDwfDigitalUartTx(hdwf, None, c_int(0))# initialize TX, drive with idle level
dwf.FDwfDigitalUartRx(hdwf, None, c_int(0), byref(cRX), byref(fParity))# initialize RX reception
time.sleep(1)

rgTX = create_string_buffer(b'Hello\r\n')
rgRX = create_string_buffer(8193)

print("Sending on TX for 10 seconds...")
dwf.FDwfDigitalUartTx(hdwf, rgTX, c_int(sizeof(rgTX)-1)) # send text, trim zero ending

tsec = time.clock() + 10 # receive for 10 seconds
print("Receiving on RX...")
while time.clock() < tsec:
    time.sleep(0.01)
    dwf.FDwfDigitalUartRx(hdwf, rgRX, c_int(sizeof(rgRX)-1), byref(cRX), byref(fParity)) # read up to 8k chars at once
    if cRX.value > 0:
        rgRX[cRX.value] = 0 # add zero ending
        print(rgRX.value.decode(), end = '', flush=True)
    if fParity.value != 0:
        print("Parity error {}".format(fParity.value))

dwf.FDwfDeviceCloseAll()

---

But it would be VERY VERY useful if I could just write and send data from here:

 

Edited October 6, 2021 by kaamil1984

[attila]

Hi @kaamil1984

It can be done.

1. You can use the "Send & Receive" tab of UART.

 

2. To automate things you can use the Script tool.

 

3. WF SDK for custom app/scripts.

On 10/5/2021 at 10:45 AM, attila said:

3. WF SDK, see manual and examples/ py/ Digital_Uart.py