57 lines
1.3 KiB
C
57 lines
1.3 KiB
C
#include <syslog.h>
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#include <ftdi.h>
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#include <def.h>
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#define LED 0x08
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int main(int argc, char *argv[])
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{
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struct ftdi_context *ftdi;
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int f, retval, cnt;
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unsigned char buf[1];
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openlog("ftdi_gpio", LOG_CONS | LOG_PID | LOG_NDELAY, LOG_LOCAL1);
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setlogmask(LOG_DEBUG);
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if ((ftdi = ftdi_new()) == 0) {
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syslog(LOG_ERR, "ftdi_new failed\n");
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return EXIT_FAILURE;
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}
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f = ftdi_usb_open(ftdi, 0x0403, 0x6001);
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if (f < 0 && f != -5) {
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syslog(LOG_ERR, "unable to open ftdi device: %d (%s)\n", f, ftdi_get_error_string(ftdi));
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retval = 1;
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goto done;
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}
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f = ftdi_set_bitmode(ftdi, LED, BITMODE_BITBANG);
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if(f < 0) {
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syslog(LOG_ERR, "unable to set bit bang mode: %d (%s)\n", f, ftdi_get_error_string(ftdi));
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retval = 1;
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goto done;
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}
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buf[0] = 0;
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for(cnt = 0; cnt < 10; cnt++) {
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buf[0] ^= LED,
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f = ftdi_write_data(ftdi, buf, 1);
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if(f < 0) {
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syslog(LOG_ERR, "write failed for 0x%x, error %d (%s)\n",buf[0], f, ftdi_get_error_string(ftdi));
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cnt = 10;
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} else {
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syslog(LOG_DEBUG, "set LED to: %u\n", (unsigned int)buf[0]);
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}
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sleep(1);
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}
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ftdi_usb_close(ftdi);
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done:
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ftdi_free(ftdi);
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closelog();
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return retval;
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}
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