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Fixed Linux MS/TP 76800 bitrate for Linux 2.6.20+ circa 2007 and added get/set API for config. (#1007)

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This commit is contained in:
Ryan Mulder
2025-05-29 09:54:12 -04:00
committed by GitHub
parent 442f408c1a
commit cb7ef20485
7 changed files with 202 additions and 395 deletions
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ports/linux/dlmstp_port.c
+14 -11
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@@ -12,11 +12,9 @@
#include <string.h>
#include <stdio.h>
#include <time.h>
#include <errno.h>
/* BACnet Stack defines - first */
#include "bacnet/bacdef.h"
/* BACnet Stack API */
#include "bacnet/bacdef.h"
#include "bacnet/bacaddr.h"
#include "bacnet/npdu.h"
#include "bacnet/datalink/mstp.h"
@@ -99,7 +97,8 @@ void dlmstp_cleanup(void *poPort)
}
/* restore the old port settings */
tcsetattr(poSharedData->RS485_Handle, TCSANOW, &poSharedData->RS485_oldtio);
termios2_tcsetattr(
poSharedData->RS485_Handle, TCSANOW, &poSharedData->RS485_oldtio2);
close(poSharedData->RS485_Handle);
pthread_cond_destroy(&poSharedData->Received_Frame_Flag);
@@ -770,7 +769,7 @@ bool dlmstp_init(void *poPort, char *ifname)
unsigned long hThread = 0;
int rv = 0;
SHARED_MSTP_DATA *poSharedData;
struct termios newtio;
struct termios2 newtio;
struct mstp_port_struct_t *mstp_port = (struct mstp_port_struct_t *)poPort;
if (!mstp_port) {
return false;
@@ -819,18 +818,22 @@ bool dlmstp_init(void *poPort, char *ifname)
fcntl(poSharedData->RS485_Handle, F_SETFL, 0);
#endif
/* save current serial port settings */
tcgetattr(poSharedData->RS485_Handle, &poSharedData->RS485_oldtio);
termios2_tcgetattr(
poSharedData->RS485_Handle, &poSharedData->RS485_oldtio2);
/* clear struct for new port settings */
bzero(&newtio, sizeof(newtio));
memset(&newtio, 0, sizeof(newtio));
/*
BAUDRATE: Set bps rate. You could also use cfsetispeed and cfsetospeed.
BOTHER: Set bps rate.
https://man7.org/linux/man-pages/man2/TCSETS.2const.html
CRTSCTS : output hardware flow control (only used if the cable has
all necessary lines. See sect. 7 of Serial-HOWTO)
CLOCAL : local connection, no modem contol
CLOCAL : local connection, no modem control
CREAD : enable receiving characters
*/
newtio.c_cflag =
poSharedData->RS485_Baud | poSharedData->RS485MOD | CLOCAL | CREAD;
poSharedData->RS485MOD | CLOCAL | CREAD | BOTHER | (BOTHER << IBSHIFT);
newtio.c_ispeed = poSharedData->RS485_Baud;
newtio.c_ospeed = poSharedData->RS485_Baud;
/* Raw input */
newtio.c_iflag = 0;
/* Raw output */
@@ -838,10 +841,10 @@ bool dlmstp_init(void *poPort, char *ifname)
/* no processing */
newtio.c_lflag = 0;
/* activate the settings for the port after flushing I/O */
tcsetattr(poSharedData->RS485_Handle, TCSAFLUSH, &newtio);
termios2_tcsetattr(poSharedData->RS485_Handle, TCSAFLUSH, &newtio);
/* flush any data waiting */
usleep(200000);
tcflush(poSharedData->RS485_Handle, TCIOFLUSH);
termios2_tcflush(poSharedData->RS485_Handle, TCIOFLUSH);
/* ringbuffer */
FIFO_Init(
&poSharedData->Rx_FIFO, poSharedData->Rx_Buffer,