2012年（1008）
分类：
2012-07-31 11:50:49
原文地址：Linux下串口程序开发（3） 作者：putiancaijunyu
#include
#include
#include
#include
#include
#include
#include
#include
#include
#include
//#include "COMM.h"
#define ACK_SUCCESS 0x00 // 操作成功
#define ACK_FAIL 0x01 // 操作失败
#define ACK_FULL 0x04 // Full
#define ACK_NOUSER 0x05 // 无此用户
#define ACK_USER_EXIST 0x07 // 用户已存在
#define ACK_TIMEOUT 0x08 // 采集超时
#define ACK_COUNT 0x3 //发生错误时候，重试次数
extern unsigned char TXBUF[9900];
extern unsigned char RXBUF[9900];
extern unsigned char rev_ok;
extern unsigned int TX_len;
extern unsigned int RX_len;
extern unsigned char one_onecontrast(unsigned char user_number_h,unsigned char user_number_l);
extern unsigned char one_morecontrast(void);
extern unsigned char Get_UserNumber_Right(void);
extern unsigned char set_addmode(unsigned char yn_repeat);
extern unsigned char add_Fingerprint(unsigned char time_number,unsigned char user_number_h,
unsigned char user_number_l,unsigned char user_right);
extern unsigned char del_alluser(void);
extern unsigned char del_oneuser(unsigned char user_number_h,unsigned char user_number_l);
extern unsigned char read_usernumber(void);
int fd;
unsigned char USER_NUMBER_H; // 用户号高8位
unsigned char USER_NUMBER_L; // 用户号低8位
unsigned char USER_RIGHT; // 用户权限
unsigned char FEATURE_BUFFER[512]; // 要下传的指纹特征值数据
unsigned char FEATURE_LEN; // 要下传的指纹特征值的长度
unsigned char CharToHex(unsigned char ch);
unsigned char select_one_onecontrast(void);
void select_Get_Usernumber_right(void);
/*********************************************************************************************
* name: SERIAL_TX
* func: 发生数据到指纹模块串口
* para: none
* ret: none
* modify:
* comment:
*********************************************************************************************/
int SERIAL_TX(void)
{
int ret;
ret = write(fd, TXBUF, TX_len); // 试图从串口发送数 据
if(ret == -1) // 确实接收到了数据，并打印出来
{
// *(rcv_buf+ret)='\0';
printf(" Write device error!\n");
return -1;
// ret = 0;
}
return 0;
}
/*********************************************************************************************
* name: SERIAL_RX
* func: 从指纹模块串口接收数据
* para: none
* ret: none
* modify:
* comment:
*********************************************************************************************/
void SERIAL_RX(void)
{
// read(fd, RXBUF , RX_len);
#if 1
int ret,n,pos,retval;
fd_set rfds;
struct timeval tv ;
pos = 0;//指向接收缓冲
tv.tv_sec = 2;
tv.tv_usec = 0;
for(n = 0; n < RX_len; n++)
{
RXBUF[n] = 0xFF;
}
//while(FD_ISSET(fd,&uart_r)||FD_ISSET(fd,&uart_w)); // 检测串口是否有读写动作
while(1) // 检测串口是否有读写动作
{
FD_ZERO(&rfds);// 清空串口接收端口集
FD_SET(fd,&rfds);// 设置串口接收端口集
retval = select(fd+1,&rfds,NULL,NULL,&tv);
if(retval == -1)
{
perror("select()");
break;
}
else if(retval)
{ //判断是否还有数据
//sleep(2);
ret = read(fd, RXBUF, RX_len);
pos += ret;
//printf("ret = %d \n",ret);
if((RXBUF[pos-2] == '\r') & (RXBUF[pos-1] == '\n')) // 确实接收到了数据，并打印出来
{
FD_ZERO(&rfds);
FD_SET(fd,&rfds);
retval = select(fd+1,&rfds,NULL,NULL,&tv);
if(!retval)//no datas
{
break;
}
}
}
else
{
break;
}
}
}
void init_ttyS(int fd)
{
struct termios newtio;
bzero(&newtio, sizeof(newtio));
tcgetattr(fd, &newtio); // 得到当前串口的参数
cfsetispeed(&newtio, B19200); // 将输入波特率设为19200
cfsetospeed(&newtio, B19200); // 将输出波特率设为19200
newtio.c_cflag |= (CLOCAL | CREAD); // 使能接收并使能本地状态
newtio.c_cflag &= ~PARENB; // 无校验 8位数据位1位停止位
newtio.c_cflag &= ~CSTOPB;
newtio.c_cflag &= ~CSIZE;
newtio.c_cflag |= CS8;
newtio.c_lflag &= ~(ICANON | ECHO | ECHOE | ISIG); // 原始数据输入
newtio.c_oflag &= ~(OPOST);
newtio.c_cc[VTIME] = 0; // 设置等待时间和最小接收字符数
newtio.c_cc[VMIN] = 0;
tcflush(fd, TCIFLUSH); // 处理未接收的字符
tcsetattr(fd,TCSANOW,&newtio); // 激活新配置
}
unsigned char set_addmode(unsigned char yn_repeat)
{
unsigned char check, i;
TXBUF[0] = 0xF5;
TXBUF[1] = 0x2D;
TXBUF[2] = 0x00;
TXBUF[3] = yn_repeat;
TXBUF[4] = 0x00;
TXBUF[5] = 0x00;
check = TXBUF[1];
for (i = 2; i < 6; i++)
{
check ^= TXBUF[i];
}
TXBUF[6] = check;
TXBUF[7] = 0xF5;
rev_ok = 1;
TX_len = 8;
RX_len = 8;
SERIAL_TX();
sleep(delaytime);
SERIAL_RX();
rev_ok = RXBUF[4];
return (rev_ok);
}
int main(int argc, char ** argv)
{
int t,ret;
char mode;
char *device = "/dev/tts/0"; // 设备路径，初始使用UART0
for(t=1;t
{
if(!strcmp(argv[t],"-d") && (argc > (t+1)))
{
device = argv[t+1];
}
}
if(!strcmp(device,"/dev/tts/1")) // 不允许使用UART1，因为它已和PC相连。
{
printf("can not use /dev/tts/1\n");
return -1;
}
fd = open(device, O_RDWR); // 打开设备
if (fd < 0) // 设备打开失败
{
printf("open device error\n");
return -1;
}
init_ttyS(fd); // 初始化设备
while(1)
{
set_addmode(1); // 设置指纹添加模式，禁止重复
}
close(fd); // 关闭打开的设备
return 0; // 正常返回
}
