static int par_open(PROGRAMMER * pgm, char * port)
{
int rc;
bitbang_check_prerequisites(pgm);
ppi_open(port, &pgm->fd);
if (pgm->fd.ifd < 0) {
fprintf(stderr, "%s: failed to open parallel port \"%s\"\n\n",
progname, port);
exit(1);
}
/*
* save pin values, so they can be restored when device is closed
*/
rc = ppi_getall(&pgm->fd, PPIDATA);
if (rc < 0) {
fprintf(stderr, "%s: error reading status of ppi data port\n", progname);
return -1;
}
pgm->ppidata = rc;
rc = ppi_getall(&pgm->fd, PPICTRL);
if (rc < 0) {
fprintf(stderr, "%s: error reading status of ppi ctrl port\n", progname);
return -1;
}
pgm->ppictrl = rc;
return 0;
}
static int linuxgpio_open(PROGRAMMER *pgm, char *port)
{
int r, i, pin;
if (bitbang_check_prerequisites(pgm) < 0)
return -1;
for (i=0; i<N_GPIO; i++)
linuxgpio_fds[i] = -1;
//Avrdude assumes that if a pin number is 0 it means not used/available
//this causes a problem because 0 is a valid GPIO number in Linux sysfs.
//To avoid annoying off by one pin numbering we assume SCK, MOSI, MISO
//and RESET pins are always defined in avrdude.conf, even as 0. If they're
//not programming will not work anyway. The drawbacks of this approach are
//that unwanted toggling of GPIO0 can occur and that other optional pins
//mostry LED status, can't be set to GPIO0. It can be fixed when a better
//solution exists.
for (i=2; i<N_PINS; i++) {
if ( (pgm->pinno[i] & PIN_MASK) != 0 ||
i == PIN_AVR_RESET ||
i == PIN_AVR_SCK ||
i == PIN_AVR_MOSI ||
i == PIN_AVR_MISO ) {
pin = pgm->pinno[i] & PIN_MASK;
if ((r=linuxgpio_export(pin)) < 0) {
avrdude_message(MSG_INFO, "Can't export GPIO %d, already exported/busy?: %s",
pin, strerror(errno));
return r;
}
if (i == PIN_AVR_MISO)
r=linuxgpio_dir_in(pin);
else
r=linuxgpio_dir_out(pin);
if (r < 0)
return r;
if ((linuxgpio_fds[pin]=linuxgpio_openfd(pin)) < 0)
return linuxgpio_fds[pin];
}
}
return(0);
}
static int gpio_open(PROGRAMMER *pgm, char *port) {
int i = 0;
bitbang_check_prerequisites(pgm);
for(i=0;i<N_PINS;i++) {
if(pgm->pinno[i] != 0) {
if(i == PIN_AVR_MISO) {
gpio_fds[pgm->pinno[i]] = PINMODE_INPUT;
pinMode(pgm->pinno[i], PINMODE_INPUT);
} else {
gpio_fds[pgm->pinno[i]] = PINMODE_OUTPUT;;
pinMode(pgm->pinno[i], PINMODE_OUTPUT);
}
}
}
return(0);
}
static int gpio_open(PROGRAMMER *pgm, char *port)
{
int r,i;
char filepath[60];
bitbang_check_prerequisites(pgm);
for (i=0; i<N_GPIO; i++)
gpio_fds[i]=-1;
for (i=0; i<N_PINS; i++) {
if (pgm->pinno[i] != 0) {
if ((r=gpio_export(pgm->pinno[i])) < 0)
return r;
if (i == PIN_AVR_MISO)
r=gpio_dir_in(pgm->pinno[i]);
else
r=gpio_dir_out(pgm->pinno[i]);
if (r < 0)
return r;
if ((r=snprintf(filepath, sizeof(filepath), "/sys/class/gpio/gpio%d/value", pgm->pinno[i]))<0)
return r;
if ((gpio_fds[pgm->pinno[i]]=open(filepath, O_RDWR))<0)
return gpio_fds[pgm->pinno[i]];
}
}
return(0);
}
static int serbb_open(PROGRAMMER *pgm, char *port)
{
DCB dcb;
LPVOID lpMsgBuf;
HANDLE hComPort = INVALID_HANDLE_VALUE;
bitbang_check_prerequisites(pgm);
hComPort = CreateFile(port, GENERIC_READ | GENERIC_WRITE, 0, NULL,
OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL);
if (hComPort == INVALID_HANDLE_VALUE) {
FormatMessage(
FORMAT_MESSAGE_ALLOCATE_BUFFER |
FORMAT_MESSAGE_FROM_SYSTEM |
FORMAT_MESSAGE_IGNORE_INSERTS,
NULL,
GetLastError(),
MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), // Default language
(LPTSTR) &lpMsgBuf,
0,
NULL);
fprintf(stderr, "%s: ser_open(): can't open device \"%s\": %s\n",
progname, port, (char*)lpMsgBuf);
LocalFree(lpMsgBuf);
return -1;
}
if (!SetupComm(hComPort, W32SERBUFSIZE, W32SERBUFSIZE))
{
CloseHandle(hComPort);
fprintf(stderr, "%s: ser_open(): can't set buffers for \"%s\"\n",
progname, port);
return -1;
}
ZeroMemory(&dcb, sizeof(DCB));
dcb.DCBlength = sizeof(DCB);
dcb.BaudRate = CBR_9600;
dcb.fBinary = 1;
dcb.fDtrControl = DTR_CONTROL_DISABLE;
dcb.fRtsControl = RTS_CONTROL_DISABLE;
dcb.ByteSize = 8;
dcb.Parity = NOPARITY;
dcb.StopBits = ONESTOPBIT;
if (!SetCommState(hComPort, &dcb))
{
CloseHandle(hComPort);
fprintf(stderr, "%s: ser_open(): can't set com-state for \"%s\"\n",
progname, port);
return -1;
}
if (verbose > 2)
fprintf(stderr,
"%s: ser_open(): opened comm port \"%s\", handle 0x%x\n",
progname, port, (int)hComPort);
pgm->fd.pfd = (void *)hComPort;
dtr = rts = txd = 0;
return 0;
}
