All pins to output with 0 bit high: 0xF1 (11110001)
Bits 0 and 1 to input, 2 and 3 to output and masked high: 0xCC (11001100)
+ The input is standard "0x" hex notation.
+ A carriage return terminates the program.
+
This program is distributed under the GPL, version 2
*/
#include <stdio.h>
#include <unistd.h>
+#include <stdlib.h>
#include <ftdi.h>
-int main(int argc, char **argv)
+int main(void)
{
- struct ftdi_context ftdic;
- int f,i;
- char buf[1];
+ struct ftdi_context *ftdi;
+ int f;
+ unsigned char buf[1];
unsigned char bitmask;
+ char input[10];
- ftdi_init(&ftdic);
-
- f = ftdi_usb_open(&ftdic, 0x0403, 0x6001);
- if(f < 0 && f != -5) {
- fprintf(stderr, "unable to open ftdi device: %d (%s)\n", f, ftdi_get_error_string(&ftdic));
- exit(-1);
+ if ((ftdi = ftdi_new()) == 0)
+ {
+ fprintf(stderr, "ftdi_new failed\n");
+ return EXIT_FAILURE;
}
- printf("ftdi open succeeded: %d\n",f);
- // enable CBUS
- bitmask = 0x71;
- printf("enabling CBUS mode\n");
- f = ftdi_set_bitmode(&ftdic, bitmask, 0x20); // cbus[0] as input (high), cbus[1-3] as output
- if (f < 0) {
- fprintf(stderr, "set_bitmode failed for 0x%x, error %d (%s)\n", bitmask, f, ftdi_get_error_string(&ftdic));
+ f = ftdi_usb_open(ftdi, 0x0403, 0x6001);
+ if (f < 0 && f != -5)
+ {
+ fprintf(stderr, "unable to open ftdi device: %d (%s)\n", f, ftdi_get_error_string(ftdi));
+ ftdi_free(ftdi);
exit(-1);
}
+ printf("ftdi open succeeded: %d\n",f);
- // write to CBUS
- buf[0] = 0xFF;
- f = ftdi_write_data(&ftdic, buf, 1);
- if(f < 0) {
- fprintf(stderr,"write failed for 0x%x, error %d (%s)\n", buf[0], f, ftdi_get_error_string(&ftdic));
- exit(-1);
- }
+ while (1)
+ {
+ // Set bitmask from input
+ fgets(input, sizeof(input) - 1, stdin);
+ if (input[0] == '\n') break;
+ bitmask = strtol(input, NULL, 0);
+ printf("Using bitmask 0x%02x\n", bitmask);
+ f = ftdi_set_bitmode(ftdi, bitmask, BITMODE_CBUS);
+ if (f < 0)
+ {
+ fprintf(stderr, "set_bitmode failed for 0x%x, error %d (%s)\n", bitmask, f, ftdi_get_error_string(ftdi));
+ ftdi_usb_close(ftdi);
+ ftdi_free(ftdi);
+ exit(-1);
+ }
- // read CBUS
- f = ftdi_read_pins(&ftdic, &buf[0]);
- if (f < 0) {
- fprintf(stderr, "read_pins failed, error %d (%s)\n", f, ftdi_get_error_string(&ftdic));
- exit(-1);
+ // read CBUS
+ f = ftdi_read_pins(ftdi, &buf[0]);
+ if (f < 0)
+ {
+ fprintf(stderr, "read_pins failed, error %d (%s)\n", f, ftdi_get_error_string(ftdi));
+ ftdi_usb_close(ftdi);
+ ftdi_free(ftdi);
+ exit(-1);
+ }
+ printf("Read returned 0x%01x\n", buf[0] & 0x0f);
}
-
printf("disabling bitbang mode\n");
- ftdi_disable_bitbang(&ftdic);
+ ftdi_disable_bitbang(ftdi);
+
+ ftdi_usb_close(ftdi);
+ ftdi_free(ftdi);
- ftdi_usb_close(&ftdic);
- ftdi_deinit(&ftdic);
+ return 0;
}