I have added the following line before calling wiringPiSPIDataRW function: SPIbuf=0 Īpart from this I have also modified a bit Arduino code in case 0: and 20: sections. I had to reset IN buffer in Raspberry Pi code part. I attache bellow a log file from Arduino for the second run: SPIbuf = 255 Please see bellow: Sending data request.Ĭould you please help me troubleshooting the issue? Thanks in advance for helping :) When you run the code for the next time on Raspberry Pi, you will get 'some' data - however not the one sent from Arduino, but it does not look to be random. on RPI Sending data request.Īnd you should get something similar on Arduino's serial: Initializing. You should get something like this - for the first run. Ozone is Segger’s full-featured graphical debugger for embedded systems.
DEBUG THROUGH SPI ARDUINO HOW TO
A list of available commands can be found here. You’ll learn how to debug your Arduino sketch by connecting Portenta Breakout to the Segger J-link device and using the Ozone debugger and performance analyzer.
DEBUG THROUGH SPI ARDUINO SERIAL
Printf(" receiving = %d\n", i, SPIbufIN) A FTDI connection enables serial communication with the 32UC3 for debugging purposes. WiringPiSPIDataRW(SPI_CHANNEL, SPIbuf, 1) Printf("Failed to init SPI communication.\n") Int fd = wiringPiSPISetupMode(SPI_CHANNEL, SPI_CLOCK_SPEED, 0)
Void CRC16(unsigned char * Data, unsigned short * CRC, unsigned char Bytes) but I did not touch the hardware and I do not have spare Raspberry/Arduino to test it.Ĭompile and flash the code on Arduino (SPI Slave) - the entire code bellow: #include "Arduino.h" I probably must have done some bug and I do not see where it is :(, or this might be a hardware issue. I made a backup, but later, when I restored it, the issue already existed. Today I got it working and I am sure I tested it for a couple of minutes and it worked fine. The issue did not exist until today morning, before that the code was under development. Problem exists until Arduino is restarted. Turning on/off Raspberry, resetting Arduino using reset button or uploading/flashing Arduino do not help. When I turn Arduino off and on again I can send/receive data fine, but again only for the first time (I mean by this that for the first time I run SPI Master code on Raspberry.) Every next try fails - means I receive unexpected data from Arduino. The problem is that I can send/receive data OK, but only for the first try after Arduino powering on. I have a problem with data exchange between Raspberry Pi 3b+ (SPI Master) and Arduino Mega (SPI Slave).
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