NFC开发日记二:pn532激活
2016-07-08 本文已影响651人
胤默思佚
测试程序
//唤醒pn532
////发送的命令(十六进制):
//55 55 00 00 00 00 00 00 00 00 00 00 00 00 00 00 FF 03 FD D4 14 01 17 00
//成功的话PN532就会返回
//00 00 FF 00 FF 00 00 00 FF 02 FE D5 15 16 00
#include<stdio.h>
#include<stdlib.h>
#include<unistd.h>
#include<sys/types.h>
#include<sys/stat.h>
#include<fcntl.h>
#include<termios.h>
#include<errno.h>
#include<string.h>
int main()
{
int fd;
int i;
int len;
int n = 0;
char read_buf[256];
char write_buf[256];
char wake[24]={0x55, 0x55, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xff, 0x03, 0xfd, 0xd4, 0x14, 0x01, 0x17, 0x00};
struct termios opt;
fd = open("/dev/ttyS1", O_RDWR|O_NOCTTY|O_NDELAY);
if(fd == -1)
{
perror("open serial 0\n");
exit(0);
}
tcgetattr(fd, &opt);
bzero(&opt, sizeof(opt));
tcflush(fd, TCIOFLUSH);
cfsetispeed(&opt, B115200);
cfsetospeed(&opt, B115200);
opt.c_cflag &= ~CSIZE;
opt.c_cflag |= CS8;
opt.c_cflag &= ~CSTOPB;
opt.c_cflag &= ~PARENB;
opt.c_cflag &= ~CRTSCTS;
opt.c_cflag |= (CLOCAL | CREAD);
opt.c_lflag &= ~(ICANON | ECHO | ECHOE | ISIG);
opt.c_oflag &= ~OPOST;
opt.c_cc[VTIME] = 0;
opt.c_cc[VMIN] = 0;
tcflush(fd, TCIOFLUSH);
printf("configure complete\n");
if(tcsetattr(fd, TCSANOW, &opt) != 0)
{
perror("serial error");
return -1;
}
printf("start send and receive data\n");
n = write(fd, wake, 24);
while(1)
{
n = 0;
len = 0;
bzero(read_buf, sizeof(read_buf));
bzero(write_buf, sizeof(write_buf));
while( (n = read(fd, read_buf, sizeof(read_buf))) > 0 )
{
for(i = len; i < (len + n); i++)
{
write_buf[i] = read_buf[i];
}
len += n;
}
write_buf[len] = '\0';
printf("Len %d \n", len);
printf("%s \n", write_buf);
for(i=0;i<len;i++)
{
printf("%c ",read_buf[i]);
}
printf("\n %s ",read_buf);
printf("write %d chars\n",n);
sleep(2);
}
return 0;
}