mirror of
https://github.com/cjcliffe/CubicSDR.git
synced 2024-11-17 17:41:52 -05:00
262 lines
7.4 KiB
C++
262 lines
7.4 KiB
C++
/*
|
|
Cross-platform serial / RS232 library
|
|
Version 0.21, 11/10/2015
|
|
-> LINUX and MacOS implementation
|
|
-> rs232-linux.c
|
|
|
|
The MIT License (MIT)
|
|
|
|
Copyright (c) 2013-2015 Frédéric Meslin, Florent Touchard
|
|
Email: fredericmeslin@hotmail.com
|
|
Website: www.fredslab.net
|
|
Twitter: @marzacdev
|
|
|
|
Permission is hereby granted, free of charge, to any person obtaining a copy
|
|
of this software and associated documentation files (the "Software"), to deal
|
|
in the Software without restriction, including without limitation the rights
|
|
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
|
|
copies of the Software, and to permit persons to whom the Software is
|
|
furnished to do so, subject to the following conditions:
|
|
|
|
The above copyright notice and this permission notice shall be included in all
|
|
copies or substantial portions of the Software.
|
|
|
|
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
|
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
|
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
|
|
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
|
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
|
|
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
|
|
SOFTWARE.
|
|
|
|
*/
|
|
|
|
#if defined(__unix__) || defined(__unix) || \
|
|
defined(__APPLE__) && defined(__MACH__)
|
|
|
|
#define _DARWIN_C_SOURCE
|
|
|
|
#include "rs232.h"
|
|
|
|
#include <unistd.h>
|
|
#define __USE_MISC // For CRTSCTS
|
|
#include <termios.h>
|
|
#include <fcntl.h>
|
|
#include <dirent.h>
|
|
|
|
#define __USE_SVID // For strdup
|
|
#include <stdlib.h>
|
|
#include <stdio.h>
|
|
#include <string.h>
|
|
|
|
/*****************************************************************************/
|
|
/** Base name for COM devices */
|
|
#if defined(__APPLE__) && defined(__MACH__)
|
|
static const char * devBases[] = {
|
|
"tty."
|
|
};
|
|
static int noBases = 1;
|
|
#else
|
|
static const char * devBases[] = {
|
|
"ttyACM", "ttyUSB", "rfcomm", "ttyS"
|
|
};
|
|
static int noBases = 4;
|
|
#endif
|
|
|
|
/*****************************************************************************/
|
|
typedef struct {
|
|
char * port;
|
|
int handle;
|
|
} COMDevice;
|
|
|
|
#define COM_MAXDEVICES 64
|
|
static COMDevice comDevices[COM_MAXDEVICES];
|
|
static int noDevices = 0;
|
|
|
|
/*****************************************************************************/
|
|
/** Private functions */
|
|
void _AppendDevices(const char * base);
|
|
int _BaudFlag(int BaudRate);
|
|
|
|
/*****************************************************************************/
|
|
int comEnumerate()
|
|
{
|
|
for (int i = 0; i < noDevices; i++) {
|
|
if (comDevices[i].port) free(comDevices[i].port);
|
|
comDevices[i].port = NULL;
|
|
}
|
|
noDevices = 0;
|
|
for (int i = 0; i < noBases; i++)
|
|
_AppendDevices(devBases[i]);
|
|
return noDevices;
|
|
}
|
|
|
|
void comTerminate()
|
|
{
|
|
comCloseAll();
|
|
for (int i = 0; i < noDevices; i++) {
|
|
if (comDevices[i].port) free(comDevices[i].port);
|
|
comDevices[i].port = NULL;
|
|
}
|
|
}
|
|
|
|
int comGetNoPorts()
|
|
{
|
|
return noDevices;
|
|
}
|
|
|
|
/*****************************************************************************/
|
|
int comFindPort(const char * name)
|
|
{
|
|
int p;
|
|
for (p = 0; p < noDevices; p++)
|
|
if (strcmp(name, comDevices[p].port) == 0)
|
|
return p;
|
|
return -1;
|
|
}
|
|
|
|
const char * comGetInternalName(int index)
|
|
{
|
|
#define COM_MAXNAME 128
|
|
static char name[COM_MAXNAME];
|
|
if (index >= noDevices || index < 0)
|
|
return NULL;
|
|
sprintf(name, "/dev/%s", comDevices[index].port);
|
|
return name;
|
|
}
|
|
|
|
const char * comGetPortName(int index) {
|
|
if (index >= noDevices || index < 0)
|
|
return NULL;
|
|
return comDevices[index].port;
|
|
}
|
|
|
|
/*****************************************************************************/
|
|
int comOpen(int index, int baudrate)
|
|
{
|
|
if (index >= noDevices || index < 0)
|
|
return 0;
|
|
// Close if already open
|
|
COMDevice * com = &comDevices[index];
|
|
if (com->handle >= 0) comClose(index);
|
|
// Open port
|
|
printf("Try %s \n", comGetInternalName(index));
|
|
int handle = open(comGetInternalName(index), O_RDWR | O_NOCTTY | O_NDELAY);
|
|
if (handle < 0)
|
|
return 0;
|
|
printf("Open %s \n", comGetInternalName(index));
|
|
// General configuration
|
|
struct termios config;
|
|
memset(&config, 0, sizeof(config));
|
|
tcgetattr(handle, &config);
|
|
config.c_iflag &= ~(INLCR | ICRNL);
|
|
config.c_iflag |= IGNPAR | IGNBRK;
|
|
config.c_oflag &= ~(OPOST | ONLCR | OCRNL);
|
|
config.c_cflag &= ~(PARENB | PARODD | CSTOPB | CSIZE | CRTSCTS);
|
|
config.c_cflag |= CLOCAL | CREAD | CS8;
|
|
config.c_lflag &= ~(ICANON | ISIG | ECHO);
|
|
int flag = _BaudFlag(baudrate);
|
|
cfsetospeed(&config, flag);
|
|
cfsetispeed(&config, flag);
|
|
// Timeouts configuration
|
|
config.c_cc[VTIME] = 1;
|
|
config.c_cc[VMIN] = 0;
|
|
//fcntl(handle, F_SETFL, FNDELAY);
|
|
// Validate configuration
|
|
if (tcsetattr(handle, TCSANOW, &config) < 0) {
|
|
close(handle);
|
|
return 0;
|
|
}
|
|
com->handle = handle;
|
|
return 1;
|
|
}
|
|
|
|
void comClose(int index)
|
|
{
|
|
if (index >= noDevices || index < 0)
|
|
return;
|
|
COMDevice * com = &comDevices[index];
|
|
if (com->handle < 0)
|
|
return;
|
|
tcdrain(com->handle);
|
|
close(com->handle);
|
|
com->handle = -1;
|
|
}
|
|
|
|
void comCloseAll()
|
|
{
|
|
for (int i = 0; i < noDevices; i++)
|
|
comClose(i);
|
|
}
|
|
|
|
/*****************************************************************************/
|
|
int comWrite(int index, const char * buffer, size_t len)
|
|
{
|
|
if (index >= noDevices || index < 0)
|
|
return 0;
|
|
if (comDevices[index].handle <= 0)
|
|
return 0;
|
|
int res = write(comDevices[index].handle, buffer, len);
|
|
if (res < 0)
|
|
res = 0;
|
|
return res;
|
|
}
|
|
|
|
int comRead(int index, char * buffer, size_t len)
|
|
{
|
|
if (index >= noDevices || index < 0)
|
|
return 0;
|
|
if (comDevices[index].handle <= 0)
|
|
return 0;
|
|
int res = read(comDevices[index].handle, buffer, len);
|
|
if (res < 0)
|
|
res = 0;
|
|
return res;
|
|
}
|
|
|
|
/*****************************************************************************/
|
|
int _BaudFlag(int BaudRate)
|
|
{
|
|
switch(BaudRate)
|
|
{
|
|
case 50: return B50; break;
|
|
case 110: return B110; break;
|
|
case 134: return B134; break;
|
|
case 150: return B150; break;
|
|
case 200: return B200; break;
|
|
case 300: return B300; break;
|
|
case 600: return B600; break;
|
|
case 1200: return B1200; break;
|
|
case 1800: return B1800; break;
|
|
case 2400: return B2400; break;
|
|
case 4800: return B4800; break;
|
|
case 9600: return B9600; break;
|
|
case 19200: return B19200; break;
|
|
case 38400: return B38400; break;
|
|
case 57600: return B57600; break;
|
|
case 115200: return B115200; break;
|
|
case 230400: return B230400; break;
|
|
default : return B0; break;
|
|
}
|
|
}
|
|
|
|
void _AppendDevices(const char * base)
|
|
{
|
|
int baseLen = strlen(base);
|
|
struct dirent * dp;
|
|
// Enumerate devices
|
|
DIR * dirp = opendir("/dev");
|
|
while ((dp = readdir(dirp)) && noDevices < COM_MAXDEVICES) {
|
|
if (strlen(dp->d_name) >= baseLen) {
|
|
if (memcmp(base, dp->d_name, baseLen) == 0) {
|
|
COMDevice * com = &comDevices[noDevices ++];
|
|
com->port = (char *) strdup(dp->d_name);
|
|
com->handle = -1;
|
|
}
|
|
}
|
|
}
|
|
closedir(dirp);
|
|
}
|
|
|
|
#endif // unix
|