IMX8MPlus-RPMsg- Linux Code

[ramesh91720721]

HI , 

I managed to run the sample code with the RPMsg Pingpong example. 

I am trying to incorporate the Reading the data from my application . 

Is there any sample to achieve it. 

Thanks,

Ramesh.

[ramesh_rajagopal]

Daniel, 

Thanks, It worked. Solved the problem. 

[danielchen]

Hi @ramesh91720721 

On the A-core (Linux) side.  Once the RPMsg channel is establised between  core A (Linux) and Cortex-M (RTOS), you can assess it via a character device.   /dev/ttyPRMSG0

You can use the standard Linux file (open, read, write)

For example,   

 

#include <stdio.h>

#include <fcntl.h>

#include <unistd.h>

int main() {

    int fd = open("/dev/ttyRPMSG0", O_RDONLY);

    if (fd < 0) {

        perror("Failed to open RPMsg device");

        return -1;

    }

    char buffer[128];

    while (1) {

        int len = read(fd, buffer, sizeof(buffer) - 1);

        if (len > 0) {

            buffer[len] = '\0';

            printf("Received: %s\n", buffer);

        }

    }

    close(fd);

    return 0;

}

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Regards

Daniel