Table Of Contents

Table Of Contents

Etherbone C Library¶

A library that can be used for communicating with a remote device.

Using the etherbone “library”¶

You can take the csr.h file out from LiteX and use it directly on your PC for development.

Create an empty directory where the program will live.
Create a directory called generated, and copy csr.h from build/software/include/generated/csr.h into this directory.

Create a main.c with the following output:

#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>

#include "etherbone.h"
#include "generated/csr.h"

static struct eb_connection *eb;

uint32_t csr_read_simple(unsigned long addr) {
    return eb_read32(eb, addr);
}

void csr_write_simple(uint32_t val, unsigned long addr) {
    eb_write32(eb, val, addr);
}

int main(int argc, char **argv) {
    eb = eb_connect("127.0.0.1", "1234", 0);
    if (!eb) {
        fprintf(stderr, "Couldn't connect\n");
        exit(1);
    }

    // You can now access registers from csr.h.  E.g.:
    fprintf(stderr, "Version: %d\n", version_major_read());
    return 0;
}

Compile this with gcc -ggdb3 etherbone.c main.c -o test-program -DCSR_ACCESSORS_DEFINED -I. -Wall

Table Of Contents

Etherbone C Library
Using the etherbone “library”