Raspberry Pi Forums

Code: Select all

struct termios PortSettings;


bool OpenPort(){
          
    Port = open("/dev/ttyUSB0", O_RDWR | O_NOCTTY);
    
    if(Port == -1){
        printf("%s", "Error of opening port /dev/ttyUSB0");
        printf("error %d opening %s: %s", errno, "", strerror (errno));
        return false;
    }
    else{
        printf("%s", "\n  ttyUSB0 Opened Successfully\n");        
    }    
    
    
    tcgetattr(Port, &PortSettings);
    
    cfsetispeed(&PortSettings,B9600);
    cfsetospeed(&PortSettings,B9600);
    
    PortSettings.c_cflag |=  PARENB;
    PortSettings.c_cflag &= ~CSTOPB;
    
    PortSettings.c_cflag &= ~CSIZE;
    PortSettings.c_cflag |=  CS8;    
    
    PortSettings.c_cflag |= CREAD | CLOCAL;
    
    PortSettings.c_cc[VMIN]  = 0; 
    PortSettings.c_cc[VTIME] = 20;
    
    PortSettings.c_iflag = 0;
    
    
    PortSettings.c_oflag = 0;
    PortSettings.c_lflag = 0;
    
    tcflush(Port, TCIFLUSH);
    
    tcsetattr(Port,TCSANOW,&PortSettings);    
    
    return true;
}


void WriteToPort(){
            
    tcflush(Port, TCIOFLUSH);
    
    write(Port, "0123456789\r", 11);
        
}

Code: Select all

#!/bin/bash

stty -F /dev/ttyUSB0 9600
stty -a -F /dev/ttyUSB0

while true; do
  echo -en "0123456789\r" > /dev/ttyUSB0
  sleep 5
done;