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ft232_test.c
131 lines (110 loc) · 3.58 KB
/
ft232_test.c
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/*-----------------------------------------------------------------------------
Based on: libftdi - A library (using libusb) to talk to FTDI's UART/FIFO chips
Original Source: https://www.intra2net.com/en/developer/libftdi/
by:
www.intra2net.com 2003-2017 Intra2net AG
Midas
-------------------------------------------------------------------------------*/
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include "include/ftdi.h"
/*------------------------------------
write to GPIOH0 -GPIOH7
--------------------------------------*/
int mpsse_write_highbits(struct ftdi_context *ftdi, unsigned char val)
{
int ret;
unsigned char buf[3];
buf[0]=SET_BITS_HIGH;
buf[1]=val;
buf[2]=0xff;//1-out
ret = ftdi_write_data(ftdi, buf, 3);
if (ret < 0)
{
fprintf(stderr,"mpsse_write_highbits() write failed, error %d (%s)\n",ret, ftdi_get_error_string(ftdi));
}
return ret;
}
/*------------------------------------
write to GPIOL0 -GPIOL7
--------------------------------------*/
int mpsse_write_lowbits(struct ftdi_context *ftdi, unsigned char val)
{
int ret;
unsigned char buf[3];
buf[0]=SET_BITS_LOW;
buf[1]=val;
buf[2]=0xff;//1-out
ret = ftdi_write_data(ftdi, buf, 3);
if (ret < 0)
{
fprintf(stderr,"mpsse_write_lowbits() write failed, error %d (%s)\n",ret, ftdi_get_error_string(ftdi));
}
return ret;
}
/*===================== MAIN ======================*/
int main(int argc, char **argv)
{
struct ftdi_context *ftdi;
int fret;
unsigned char buf[2],val;
int retval = 0;
int i,k;
unsigned short usb_val;
//------ Allocate a ftdi device struct -----
if ((ftdi = ftdi_new()) == 0)
{
fprintf(stderr, "ftdi_new failed\n");
return EXIT_FAILURE;
}
//------ open a ftdi usb device -------
fret = ftdi_usb_open(ftdi, 0x0403, 0x6014); //VID and PID
if (fret < 0 && fret != -5) // ??? -5
{
fprintf(stderr, "unable to open ftdi device: %d (%s)\n", fret, ftdi_get_error_string(ftdi));
retval = 1;
goto done;
}
printf("ftdi open succeeded: %d\n",fret);
//------- configure to BITMODE_MPSSE mode -----
printf("configure to BITMODE_MPSSE mode\n");
ftdi_set_bitmode(ftdi, 0x00, BITMODE_MPSSE);
//usleep(100000); // Is it necessary ?
//----- run a LED test -----
mpsse_write_highbits(ftdi,0x00);
mpsse_write_lowbits(ftdi,0xee);
//sleep(3); // pause for a while
//------- configure to BITMODE_BITBANG mode -----
//!!!! no disable BITMODE_MPSSE MODE here !!!!!
printf("configure to BITMODE_BITBANG mode\n");
ftdi_set_bitmode(ftdi, 0xFF, BITMODE_BITBANG);
//usleep(100000); // Is it necessary ?
//----- set baudrate here ------
//------ purge rx buffer in FT232H ------
ftdi_usb_purge_rx_buffer(ftdi);// ineffective ??
//------ set chunk_size, default is 4096
//chunk_size=1024*64;// >=1024*32 same effect. default is 4096
//ftdi_write_data_set_chunksize(ftdi,chunk_size);
//ftdi_write_data_get_chunksize(ftdi, &chunk_size);
//----- run a LED test -----
for(i=0;i<30;i++)
{
buf[0] = 0xFF-(1<<(i%8));
if(buf[0] == 0) buf[0]=0xFF;
fret = ftdi_write_data(ftdi, buf, 1);
if (fret < 0)
{
fprintf(stderr,"ftdi_write_data() failed, error %d (%s)\n",fret, ftdi_get_error_string(ftdi));
}
usleep(200000);
}
//------- disable bitbang mode ---------
printf("disabling bitbang mode\n");
ftdi_disable_bitbang(ftdi);
//------ close ftdi usb device and free mem. -------
ftdi_usb_close(ftdi);
done:
ftdi_free(ftdi);
return retval;
}