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Add support for custom, nonstandard baud rates.

This commit is contained in:
Solomon Peachy 2014-10-14 11:16:02 -04:00
parent 4f06d96cef
commit d8d860c458
1 changed files with 35 additions and 4 deletions
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39
common.c
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@ -22,12 +22,16 @@
#include "common.h"
#include <termios.h>
#include <sys/ioctl.h>
#include <linux/tty.h>
#include <linux/serial.h>
int setserial(struct termios *cfg, int ser_fd, int baud,
int databits, char parity, int stopbits,
int hw_flow, int sw_flow, int modemlines)
{
int rval = 0;
int custom = 0;
rval = tcgetattr(ser_fd, cfg);
if (rval) goto done;
@ -56,11 +60,23 @@ int setserial(struct termios *cfg, int ser_fd, int baud,
SERIAL_BAUD_CASE(57600);
SERIAL_BAUD_CASE(115200);
SERIAL_BAUD_CASE(230400);
SERIAL_BAUD_CASE(460800);
SERIAL_BAUD_CASE(576000);
SERIAL_BAUD_CASE(921600);
SERIAL_BAUD_CASE(1000000);
SERIAL_BAUD_CASE(1152000);
SERIAL_BAUD_CASE(1500000);
SERIAL_BAUD_CASE(2000000);
SERIAL_BAUD_CASE(2500000);
SERIAL_BAUD_CASE(3000000);
SERIAL_BAUD_CASE(3500000);
SERIAL_BAUD_CASE(4000000);
default:
fprintf(stderr, "Invalid serial baud rate specified (%d)\n",
fprintf(stderr, "Non-standard baud rate specified; may not function (%d)\n",
baud);
rval = 1;
goto done;
cfsetispeed(cfg, B38400);
cfsetospeed(cfg, B38400);
custom = 1;
}
parity &= ~0x20; /* make things case insensitive */
@ -138,9 +154,24 @@ int setserial(struct termios *cfg, int ser_fd, int baud,
rval = tcsetattr(ser_fd, TCSANOW, cfg);
if (rval) goto done;
if (custom) {
struct serial_struct serinfo;
if (ioctl(ser_fd, TIOCGSERIAL, &serinfo) < 0) {
perror("Can't get serial info:");
goto done;
}
serinfo.flags &= ~ASYNC_SPD_MASK;
serinfo.flags |= ASYNC_SPD_CUST;
serinfo.custom_divisor = serinfo.baud_base / baud;
if (ioctl(ser_fd, TIOCSSERIAL, &serinfo) < 0) {
perror("Can't set serial info:");
goto done;
}
}
done:
if (rval) fprintf(stderr, "ERROR.. %d\n", rval);
{
struct termios cfg2;
tcgetattr(ser_fd, &cfg2);