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Implement nonstandard baudrate handling on MacOS 

Alas, MacOS doesn't handle nonstandard baud rates like other systems
in regular tcsetattr() calls. Instead, they invented a new ioctl
(IOSSIOSPEED). So, if we notice we are going to configure a
nonstandard rate on MacOS, issue that ioctl after configuring
everything else using tcsetattr().
This commit is contained in:
Joerg Wunsch 2022-03-07 23:20:50 +01:00
parent 34168759b0
commit 87b39637ff
2 changed files with 35 additions and 5 deletions
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2
build.sh
View File

@ -59,7 +59,7 @@ case "${ostype}" in
;;
esac
cmake ${build_flags} ${extra_enable} -D CMAKE_BUILD_TYPE=${build_type} -B build_${ostype} ||\
cmake ${build_flags} ${extra_enable} -D CMAKE_VERBOSE_MAKEFILE:BOOL=ON -D CMAKE_BUILD_TYPE=${build_type} -B build_${ostype} ||\
{ echo "CMake failed."; exit 1; }
cmake --build build_${ostype} ||\
{ echo "Build failed."; exit 1; }

38
src/ser_posix.c
View File

@ -28,6 +28,7 @@
#include "ac_cfg.h"
#include <ctype.h>
#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
@ -42,6 +43,10 @@
#include <termios.h>
#include <unistd.h>
#ifdef __APPLE__
# include <IOKit/serial/ioss.h>
#endif
#include "avrdude.h"
#include "libavrdude.h"
@ -78,10 +83,12 @@ static struct baud_mapping baud_lookup_table [] = {
static struct termios original_termios;
static int saved_original_termios;
static speed_t serial_baud_lookup(long baud)
static speed_t serial_baud_lookup(long baud, bool *nonstandard)
{
struct baud_mapping *map = baud_lookup_table;
*nonstandard = false;
while (map->baud) {
if (map->baud == baud)
return map->speed;
@ -95,6 +102,8 @@ static speed_t serial_baud_lookup(long baud)
avrdude_message(MSG_NOTICE, "%s: serial_baud_lookup(): Using non-standard baud rate: %ld",
progname, baud);
*nonstandard = true;
return baud;
}
@ -102,7 +111,8 @@ static int ser_setparams(union filedescriptor *fd, long baud, unsigned long cfla
{
int rc;
struct termios termios;
speed_t speed = serial_baud_lookup (baud);
bool nonstandard;
speed_t speed = serial_baud_lookup (baud, &nonstandard);
if (!isatty(fd->ifd))
return -ENOTTY;
@ -146,8 +156,16 @@ static int ser_setparams(union filedescriptor *fd, long baud, unsigned long cfla
termios.c_iflag &= ~PARMRK;
#endif /* PARMRK */
cfsetospeed(&termios, speed);
cfsetispeed(&termios, speed);
// MacOS doesn't handle nonstandard baudrate values in
// normal tcsetattr(), sigh.
#ifdef __APPLE__
if (!nonstandard) {
#endif
cfsetospeed(&termios, speed);
cfsetispeed(&termios, speed);
#ifdef __APPLE__
}
#endif
termios.c_cflag &= ~CSIZE;
if (cflags & SERIAL_CS8) {
@ -204,6 +222,17 @@ static int ser_setparams(union filedescriptor *fd, long baud, unsigned long cfla
return -errno;
}
#ifdef __APPLE__
// handle nonstandard speed values the MacOS way
if (nonstandard) {
if (ioctl(fd->ifd, IOSSIOSPEED, &speed) < 0) {
avrdude_message(MSG_INFO, "%s: ser_setparams(): ioctrl(IOSSIOSPEED) failed\n",
progname);
return -errno;
}
}
#endif // __APPLE__
tcflush(fd->ifd, TCIFLUSH);
return 0;
@ -564,3 +593,4 @@ struct serial_device serial_serdev =
struct serial_device *serdev = &serial_serdev;
#endif /* WIN32 */