/**
* Initialize a serial port.
*
* \param fd KFile Serial struct interface.
* \param unit Serial unit to open. Possible values are architecture dependant.
*/
static struct Serial *ser_open(struct Serial *fd, unsigned int unit)
{
ASSERT(unit < countof(ser_handles));
ser_handles[unit] = fd;
ASSERT(!fd->is_open);
DB(fd->is_open = true);
fd->unit = unit;
fd->hw = ser_hw_getdesc(unit);
/* Initialize circular buffers */
ASSERT(fd->hw->txbuffer);
ASSERT(fd->hw->rxbuffer);
fifo_init(&fd->txfifo, fd->hw->txbuffer, fd->hw->txbuffer_size);
fifo_init(&fd->rxfifo, fd->hw->rxbuffer, fd->hw->rxbuffer_size);
fd->hw->table->init(fd->hw, fd);
/* Set default values */
#if CONFIG_SER_RXTIMEOUT != -1 || CONFIG_SER_TXTIMEOUT != -1
ser_settimeouts(fd, CONFIG_SER_RXTIMEOUT, CONFIG_SER_TXTIMEOUT);
#endif
#if CONFIG_SER_DEFBAUDRATE
ser_setbaudrate(fd, CONFIG_SER_DEFBAUDRATE);
#endif
/* Clear error flags */
ser_setstatus(fd, 0);
return fd;
}
static int8_t _gsmWrite(const char *cmd, size_t count)
{
size_t i;
// NOTE: debugging should no be mixed to modem command and response to
// avoid timeing issues and discrepancy between debug and release
// versions
gsmDebug("TX [%s]\n", cmd);
// Purge any buffered data before sending a new command
ser_purge(gsm);
// Clear error flags
ser_setstatus(gsm, 0);
// Sending the AT command
WATCHDOG_RESET();
for (i=0; cmd[i]!='\0' && count; i++, count--) {
kfile_putc(cmd[i], &(gsm->fd));
WATCHDOG_RESET();
}
return i;
}
static void ser_clearerr(struct KFile *fd)
{
Serial *fds = SERIAL_CAST(fd);
ser_setstatus(fds, 0);
}
