Created
August 5, 2012 15:37
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糞rs232c
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#include <stdio.h> | |
#include <string.h> | |
#include <sys/types.h> | |
#include <sys/stat.h> | |
#include <fcntl.h> | |
#include <termios.h> | |
#include <unistd.h> | |
int main( void ) | |
{ | |
int i; | |
int fd; | |
int n_data; | |
struct termios tio; | |
int err; | |
/* char sData[1]; */ | |
unsigned char rData[255]; | |
if ((fd = open("/dev/ttyUSB0", O_RDWR | O_NOCTTY | | |
O_NONBLOCK))<0) { | |
puts("ERROR: can not open /dev/ttyUSB0"); return -1; | |
} | |
memset(&tio, 0x00, sizeof(tio)); | |
tio.c_cflag = B1200 | CS8 | CLOCAL | CREAD; | |
tio.c_iflag = IGNPAR | ICRNL; | |
tio.c_oflag = 0; | |
tio.c_lflag = 0; | |
tio.c_cc[VTIME] = 0; | |
tio.c_cc[VMIN] = 1; | |
tcflush(fd, TCIFLUSH); | |
tcsetattr(fd, TCSANOW, &tio); | |
fcntl(fd, F_SETFL, FNDELAY); | |
/* sData[0] = ' '; */ | |
memset( rData, 0x00, sizeof(rData) ); | |
while(1){ | |
/* // 1キャラクタ送信 */ | |
/* err = write( fd, sData, 1); */ | |
/* sData[0]++; */ | |
/* if( sData[0]>='z' ){ */ | |
/* sData[0] = ' '; */ | |
/* } */ | |
// 受信 | |
n_data = read( fd, rData, sizeof(rData) ); | |
if(n_data == -1) | |
continue; | |
printf("\nSIZE:%d\n",n_data); | |
for(i=0; i<n_data; i++){ | |
printf( "0x%02x\t", rData[i] ); // 受信データ表示 | |
} | |
/* rData[0] = 0x00; */ | |
// 500 * 10 mSecのWAIT | |
usleep( 500000 * 10 ); | |
} | |
close( fd ); | |
} |
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