/*
* issue the 'program enable' command to the AVR device
*/
static int ft245r_program_enable(PROGRAMMER * pgm, AVRPART * p) {
int retry_count = 0;
unsigned char cmd[4];
unsigned char res[4];
int i,reset_ok;
ft245r_set_bitclock(pgm);
retry:
reset_ok = 0;
set_reset(pgm, 0);
usleep(5000); // 5ms
set_reset(pgm, 1);
usleep(5000); // 5ms
set_reset(pgm, 0);
usleep(5000); // 5ms
cmd[0] = 0xAC;
cmd[1] = 0x53;
cmd[2] = 0;
cmd[3] = 0;
ft245r_cmd(pgm, cmd, res);
if (res[2] == 0x53 ) reset_ok = 1;
for (i=0; i<3; i++) {
cmd[0] = 0x30;
cmd[1] = 0;
cmd[2] = i;
cmd[3] = 0;
ft245r_cmd(pgm, cmd, res);
saved_signature[i] = res[3];
}
if (reset_ok && (saved_signature[0] == 0x1e)) // success
return 0;
if (retry_count < 5) {
if (retry_count == 3) {
ft245r_drain (pgm, 0);
tail = head;
}
retry_count++;
goto retry;
}
if ((verbose>=1) || FT245R_DEBUG) {
fprintf(stderr,
"%s: ft245r_program_enable: failed\n", progname);
fflush(stderr);
}
return -1;
}
static int ft245r_open(PROGRAMMER * pgm, char * port) {
int rv;
int devnum = -1;
rv = pins_check(pgm,pin_checklist,sizeof(pin_checklist)/sizeof(pin_checklist[0]), true);
if(rv) {
pgm->display(pgm, progbuf);
return rv;
}
strcpy(pgm->port, port);
if (strcmp(port,DEFAULT_USB) != 0) {
if (strncasecmp("ft", port, 2) == 0) {
char *startptr = port + 2;
char *endptr = NULL;
devnum = strtol(startptr,&endptr,10);
if ((startptr==endptr) || (*endptr != '\0')) {
devnum = -1;
}
}
if (devnum < 0) {
avrdude_message(MSG_INFO, "%s: invalid portname '%s': use 'ft[0-9]+'\n",
progname,port);
return -1;
}
} else {
devnum = 0;
}
handle = malloc (sizeof (struct ftdi_context));
ftdi_init(handle);
LNODEID usbpid = lfirst(pgm->usbpid);
int pid;
if (usbpid) {
pid = *(int *)(ldata(usbpid));
if (lnext(usbpid))
avrdude_message(MSG_INFO, "%s: Warning: using PID 0x%04x, ignoring remaining PIDs in list\n",
progname, pid);
} else {
pid = USB_DEVICE_FT245;
}
rv = ftdi_usb_open_desc_index(handle,
pgm->usbvid?pgm->usbvid:USB_VENDOR_FTDI,
pid,
pgm->usbproduct[0]?pgm->usbproduct:NULL,
pgm->usbsn[0]?pgm->usbsn:NULL,
devnum);
if (rv) {
avrdude_message(MSG_INFO, "can't open ftdi device %d. (%s)\n", devnum, ftdi_get_error_string(handle));
goto cleanup_no_usb;
}
ft245r_ddr =
pgm->pin[PIN_AVR_SCK].mask[0]
| pgm->pin[PIN_AVR_MOSI].mask[0]
| pgm->pin[PIN_AVR_RESET].mask[0]
| pgm->pin[PPI_AVR_BUFF].mask[0]
| pgm->pin[PPI_AVR_VCC].mask[0]
| pgm->pin[PIN_LED_ERR].mask[0]
| pgm->pin[PIN_LED_RDY].mask[0]
| pgm->pin[PIN_LED_PGM].mask[0]
| pgm->pin[PIN_LED_VFY].mask[0];
/* set initial values for outputs, no reset everything else is off */
ft245r_out = 0;
ft245r_out = SET_BITS_0(ft245r_out,pgm,PIN_AVR_RESET,1);
ft245r_out = SET_BITS_0(ft245r_out,pgm,PIN_AVR_SCK,0);
ft245r_out = SET_BITS_0(ft245r_out,pgm,PIN_AVR_MOSI,0);
ft245r_out = SET_BITS_0(ft245r_out,pgm,PPI_AVR_BUFF,0);
ft245r_out = SET_BITS_0(ft245r_out,pgm,PPI_AVR_VCC,0);
ft245r_out = SET_BITS_0(ft245r_out,pgm,PIN_LED_ERR,0);
ft245r_out = SET_BITS_0(ft245r_out,pgm,PIN_LED_RDY,0);
ft245r_out = SET_BITS_0(ft245r_out,pgm,PIN_LED_PGM,0);
ft245r_out = SET_BITS_0(ft245r_out,pgm,PIN_LED_VFY,0);
rv = ftdi_set_bitmode(handle, ft245r_ddr, BITMODE_SYNCBB); // set Synchronous BitBang
if (rv) {
avrdude_message(MSG_INFO, "%s: Synchronous BitBangMode is not supported (%s)\n",
progname, ftdi_get_error_string(handle));
goto cleanup;
}
rv = ft245r_set_bitclock(pgm);
if (rv) {
goto cleanup;
}
/* We start a new thread to read the output from the FTDI. This is
* necessary because otherwise we'll deadlock. We cannot finish
* writing because the ftdi cannot send the results because we
* haven't provided a read buffer yet. */
sem_init (&buf_data, 0, 0);
sem_init (&buf_space, 0, BUFSIZE);
pthread_create (&readerthread, NULL, reader, handle);
/*
* drain any extraneous input
*/
ft245r_drain (pgm, 0);
ft245r_send (pgm, &ft245r_out, 1);
ft245r_recv (pgm, &ft245r_in, 1);
return 0;
cleanup:
ftdi_usb_close(handle);
cleanup_no_usb:
ftdi_deinit (handle);
free(handle);
handle = NULL;
return -1;
}
