C shim to read serial data via FTDI driver. Compile on Rascal with: gcc -lftdi -oread-ftdi read-ftdi.c

read-ftdi.c

/* simple.c

   Simple libftdi usage example

   This program is distributed under the GPL, version 2
*/

#include <ftdi.h>
#include <stdio.h>
#include <string.h>

int main(void)
{
    int ret;
    int f = 0;
    struct ftdi_context ftdic;
    char c[4096];
    memset(c,0,256);
    
    if (ftdi_init(&ftdic) < 0)
    {
        fprintf(stderr, "ftdi_init failed\n");
        return EXIT_FAILURE;
    }

    if ((ret = ftdi_usb_open(&ftdic, 0x0403, 0x6001)) < 0)
    {
        fprintf(stderr, "unable to open ftdi device: %d (%s)\n", ret, ftdi_get_error_string(&ftdic));
        return EXIT_FAILURE;
    }

    // Read out FTDIChip-ID of R type chips
/*    if (ftdic.type == TYPE_R)
    {
        unsigned int chipid;
        printf("ftdi_read_chipid: %d\n", ftdi_read_chipid(&ftdic, &chipid));
        printf("FTDI chipid: %X\n", chipid);
    } */
    
    ftdi_usb_purge_buffers(&ftdic);
    
    f = ftdi_read_data(&ftdic, c, 4096);
    while (f<=0) {
        sleep(1);
        f = ftdi_read_data(&ftdic, c, 4096);
    }
    printf("%s", c);

    if ((ret = ftdi_usb_close(&ftdic)) < 0)
    {
        fprintf(stderr, "unable to close ftdi device: %d (%s)\n", ret, ftdi_get_error_string(&ftdic));
        return EXIT_FAILURE;
    }

    ftdi_deinit(&ftdic);

    return EXIT_SUCCESS;
}