main.c
/*
* Einfaches Demo-Programm
* Blinkenlights-Bausatz
* www.eHaJo.de
*
* (C) Hannes Jochriem, 2013
*
*/
#include <stdio.h>
#include <string.h>
#include <fcntl.h>
#include <termios.h>
int main()
{
printf("Starte LEDMatrix-Programm\n");
int fd;
struct termios options;
char buffer;
int temp;
fd = open("/dev/ttyACM0", O_RDWR | O_NOCTTY | O_NDELAY); // seriellen port oeffnen
if(fd == -1)
{
printf("konnte Port nicht oeffnen\n");
}
else
{
fcntl(fd, F_SETFL, 0);
printf("port geoeffnet...\n");
}
// seriellen port konfigurieren:
tcgetattr(fd, &options);
cfsetispeed(&options, B115200);
cfsetospeed(&options, B115200);
options.c_cflag |= (CLOCAL | CREAD);
options.c_cflag &= ~PARENB;
options.c_cflag &= ~CSTOPB;
options.c_cflag &= ~CSIZE;
options.c_cflag |= CS8;
options.c_cflag &= ~( ICANON | ECHO | ECHOE |ISIG );
options.c_iflag &= ~(IXON | IXOFF | IXANY );
options.c_oflag &= ~OPOST;
tcsetattr(fd, TCSANOW, &options); // die config an den port uebertragen
while(1)
{ // haupt-endlosschleife
while(1)
{
printf("Bitte Zeile eingeben (1-8): ");
scanf("%d", &temp);
if(!(temp < 1 || temp > 8))
{ // zeichen gueltig
buffer = ((temp-1) << 1);
break;
}
}
while(1)
{
printf("Bitte Spalte eingeben (1-8): ");
scanf("%d", &temp);
if(!(temp < 1 || temp > 8))
{ // zeichen gueltig
buffer |= ((temp-1) << 4);
break;
}
}
while(1)
{
printf("Ein (1) oder Aus (0): ");
scanf("%d", &temp);
if(!(temp < 0 || temp > 1))
{ // zeichen gueltig
buffer |= temp;
break;
}
}
write(fd, &buffer, 1); // sende byte an ledmatrix
}
close(fd); // port schliessen
return 0;
}
