Przesyłam informację poprzez port USB z Arduino UNO R3 do komputera z Linux'em x86, noi raz działa, a raz nie.
PC LINUX x86 [C++ KOD]:
Kod: Zaznacz cały
//C++ (LINUX PC x86)
#include <unistd.h>
#include <sstream>
#include <string>
#include <iostream>
#include <stdio.h>
#include <stdlib.h>
#include <sys/ioctl.h>
#include <fcntl.h>
#include <termios.h>
/* My Arduino is on /dev/ttyACM0 */
char *portname = "/dev/ttyACM0";
char buf[256];
int main(int argc, char *argv[])
{
while(true)
{
int fd;
/* Open the file descriptor in non-blocking mode */
fd = open(portname, O_RDWR | O_NOCTTY);
/* Set up the control structure */
struct termios toptions;
/* Get currently set options for the tty */
tcgetattr(fd, &toptions);
/* Set custom options */
/* 9600 baud */
cfsetispeed(&toptions, B9600);
cfsetospeed(&toptions, B9600);
/* 8 bits, no parity, no stop bits */
toptions.c_cflag &= ~PARENB;
toptions.c_cflag &= ~CSTOPB;
toptions.c_cflag &= ~CSIZE;
toptions.c_cflag |= CS8;
/* no hardware flow control */
toptions.c_cflag &= ~CRTSCTS;
/* enable receiver, ignore status lines */
toptions.c_cflag |= CREAD | CLOCAL;
/* disable input/output flow control, disable restart chars */
toptions.c_iflag &= ~(IXON | IXOFF | IXANY);
/* disable canonical input, disable echo,
disable visually erase chars,
disable terminal-generated signals */
toptions.c_iflag &= ~(ICANON | ECHO | ECHOE | ISIG);
/* disable output processing */
toptions.c_oflag &= ~OPOST;
/* wait for 24 characters to come in before read returns */
toptions.c_cc[VMIN] = 5;
/* no minimum time to wait before read returns */
toptions.c_cc[VTIME] = 0;
/* commit the options */
tcsetattr(fd, TCSANOW, &toptions);
/* Wait for the Arduino to reset */
usleep(1000*1000);
/* Flush anything already in the serial buffer */
tcflush(fd, TCIFLUSH);
/* read up to 128 bytes from the fd */
int n = read(fd, buf, 5);
/* print how many bytes read */
printf("%i bytes got read...\n", n);
/* print what's in the buffer */
printf("Buffer contains... \n%s\n", buf);
//std::string str(buf);
//std::cout << str << std::endl;
}
return 0;
}Kod: Zaznacz cały
//(Arduino UNO)
void setup()
{
Serial.begin(9600);
}
void loop()
{
Serial.print("12345");
delay(1000);
}
Kod: Zaznacz cały
//Wyniki
5 bytes got read...
Buffer contains...
12345
5 bytes got read...
Buffer contains...
51234
5 bytes got read...
Buffer contains...
45123
5 bytes got read...
Buffer contains...
34512
5 bytes got read...
Buffer contains...
23451
5 bytes got read...
Buffer contains...
23451
5 bytes got read...
Buffer contains...
12345