65 lines
1.6 KiB
C++
65 lines
1.6 KiB
C++
#include "serial_io.h"
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struct termios toptions;
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void sWrite(int port, char string[], size_t length)
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{
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if(port != -1) write(port, string, length);
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}
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void sWrite(int port, const char string[], size_t length)
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{
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if(port != -1) write(port, string, length);
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}
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ssize_t sRead(int port, void *buf, size_t count)
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{
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return (port != -1) ? read(port, buf, count) : 0;
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}
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int serialport_init(const char* device, int baud)
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{
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int fd;
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fd = open(device, O_RDWR | O_NOCTTY | O_NDELAY);
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if (fd == -1)
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{
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perror("init_serialport: Unable to open port ");
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return -1;
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}
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if (tcgetattr(fd, &toptions) < 0)
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{
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perror("init_serialport: Couldn't get term attributes");
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return -1;
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}
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cfsetispeed(&toptions, baud);
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cfsetospeed(&toptions, baud);
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// 8N1
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toptions.c_cflag &= ~PARENB;
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toptions.c_cflag &= ~CSTOPB;
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toptions.c_cflag &= ~CSIZE;
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toptions.c_cflag |= CS8;
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// no flow control
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toptions.c_cflag &= ~(CRTSCTS | CLOCAL);
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toptions.c_cflag |= IGNPAR | CREAD; // turn on READ & ignore ctrl lines
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toptions.c_iflag &= ~(IXON | IXOFF | IXANY); // turn off s/w flow ctrl
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toptions.c_lflag &= ~(ICANON | ISIG | ECHO | ECHOE); // make raw
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toptions.c_oflag &= ~OPOST; // make raw
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// see: http://unixwiz.net/techtips/termios-vmin-vtime.html
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/*toptions.c_cc[VMIN] = 0;
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toptions.c_cc[VTIME] = 20;
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fcntl(fd, F_SETFL, FNDELAY);*/
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if( tcsetattr(fd, TCSANOW, &toptions) < 0)
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{
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perror("init_serialport: Couldn't set term attributes");
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return -1;
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}
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return fd;
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}
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