一直有人在问如何UART接收数据，最近很忙，抱歉
本帖最后由 jiangdou 于 2015-5-22 19:09 编辑不多说，上代码
图片为证
A10A20A31 A80RK3188RK3288都可以用
/*
*file jiangdou_passwd.c
*time 2015-05-01
*
*author by jiangdou QQ:344283973
*
*/
#include "jiangdou_passwd.h"
#include <dirent.h>
#include <stdio.h>
#include <stdlib.h>
#include <stddef.h>
#include <errno.h>
#include <ctype.h>
#include <unistd.h>
#include <fcntl.h>
#include <string.h>
#include <math.h>
#include <semaphore.h>
#include <pthread.h>
#include <termios.h>
#include <signal.h>
#include <linux/kd.h>
#include <linux/fb.h>
#include <sys/time.h>
#include <sys/ipc.h>
//#include <sys/msg.h>
#include <sys/mman.h>
#include <sys/ioctl.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/un.h>
//#include <sys/shm.h>
#include <sys/socket.h>
#include <sys/un.h>
pthread_t thread;
pthread_mutex_t mut;
int fd =0;
int IsReceve = 0;
unsigned char msg;
char buff;
time_t now;
struct tm *tm_now;
char *datetime;
int Set_Port(int fd,int baud_rate,int data_bits,char parity,int stop_bits)
{
struct termios newtio,oldtio; //
//fprintf(stdout,"The Fucntion Set_Port() Begin!\n");
if( tcgetattr(fd,&oldtio) !=0 )
{
perror("Setup Serial:");
return -1;
}
bzero(&newtio,sizeof(newtio));
newtio.c_cflag |= CLOCAL | CREAD;
newtio.c_cflag &= ~CSIZE;
//Set BAUDRATE
switch(baud_rate)
{
case 2400:
cfsetispeed(&newtio,B2400);
cfsetospeed(&newtio,B2400);
break;
case 4800:
cfsetispeed(&newtio,B4800);
cfsetospeed(&newtio,B4800);
break;
case 9600:
cfsetispeed(&newtio,B9600);
cfsetospeed(&newtio,B9600);
break;
case 19200:
cfsetispeed(&newtio,B19200);
cfsetospeed(&newtio,B19200);
break;
case 38400:
cfsetispeed(&newtio,B38400);
cfsetospeed(&newtio,B38400);
break;
case 115200:
cfsetispeed(&newtio,B115200);
cfsetospeed(&newtio,B115200);
break;
default:
cfsetispeed(&newtio,B9600);
cfsetospeed(&newtio,B9600);
break;
}
//Set databits upon 7 or 8
switch(data_bits)
{
case 7:
newtio.c_cflag |= CS7;
break;
case 8:
default:
newtio.c_cflag |= CS8;
}
switch(parity)
{
default:
case 'N':
case 'n':
{
newtio.c_cflag &= ~PARENB;
newtio.c_iflag &= ~INPCK;
}
break;
case 'o':
case 'O':
{
newtio.c_cflag |= (PARODD|PARENB);
newtio.c_iflag |= INPCK;
}
break;
case 'e':
case 'E':
{
newtio.c_cflag |= PARENB;
newtio.c_cflag &= ~PARODD;
newtio.c_iflag |= INPCK;
}
break;
case 's':
case 'S':
{
newtio.c_cflag &= ~PARENB;
newtio.c_cflag &= ~CSTOPB;
}
break;
}
//Set STOPBITS 1 or 2
switch(stop_bits)
{
default:
case 1:
{
newtio.c_cflag &= ~CSTOPB;
}
break;
case 2:
{
newtio.c_cflag |= CSTOPB;
}
break;
}
newtio.c_cc= 1;
newtio.c_cc = 255; //Read Comport Buffer when the bytes in Buffer is more than VMIN bytes!
tcflush(fd,TCIFLUSH);
if(( tcsetattr(fd,TCSANOW,&newtio))!=0 )
{
perror("Com set error");
return -1;
}
//fprintf(stdout,"The Fucntion Set_Port() End!\n");
return 0;
}
int Open_Port(int com_port)
{
int fd = 0;
//fprintf(stdout,"Function Open_Port Begin!\n");
char *dev[] = { "/dev/ttyS0","/dev/ttyS1","/dev/ttyS2","/dev/ttyS3","/dev/ttyS4","/dev/ttyS5","/dev/ttyS6"};
if( (com_port < 0) || (com_port >6) )
{
perror("The port is out range:");
return -1;
}
//Open the port
//fd = open(dev,O_RDWR|O_NOCTTY|O_NDELAY);
fd = open("/dev/ttyS3",O_RDWR|O_NOCTTY|O_NDELAY);
if( fd<0 )
{
perror("Open serial port:");
return -1;
}
if( fcntl(fd,F_SETFL,0)<0 )
{
perror("fcntl F_SETFL:");
return -1;
}
if( isatty(fd) ==0 )
{
perror("isatty is not a terminal device");
return -1;
}
return fd;
}
int StrToInt(char *str)
{
int value= 0;
int sign = 1;
int result = 0;
if(NULL == str)
{
return -1;
}
if('-' == *str)
{
sign = -1;
str++;
}
while(*str)
{
value = value * 10 + *str - '0';
str++;
}
result = sign * value;
return result;
}
本帖最后由 jiangdou 于 2015-5-22 19:08 编辑
A10A20A31 A80RK3188RK3288都可以用
接上页void read_port(void)
{
fd_set rd;
int nread,retval;
struct timeval timeout;
FD_ZERO(&rd);
FD_SET(fd,&rd);
timeout.tv_sec = 3;
timeout.tv_usec = 0;
while(IsReceve == 1);
retval = select(fd+1,&rd,NULL,NULL,&timeout);
switch(retval)
{
case 0:
//printf("No data input within 1 seconds.\n");
break;
case -1:
perror("select:");
break;
default:
if( (nread = read(fd,msg,1024))>0 )
{
IsReceve =1;
//printf("%sReceiveMessage: %s\n",msg,datetime);
//printf("\n%sReceive %d bytes,Message is:\n%s\n",datetime,nread,msg);
sprintf(buff, "%s", msg);//warning 去掉unsigned char buff ->char buff
memset(msg,0,80);
}
break;
}//end of switch
}
void create_thread(void)
{
int temp;
memset(thread,0,sizeof(thread));
if((temp = pthread_create(&thread,NULL,(void *)read_port,NULL)) != 0)
printf("Create recv_thread failed!\n");
}
void wait_thread(void)
{
if(thread != 0)
{
pthread_join(thread,NULL);//等待线程结束
//printf("recev_thread end\n");
}
}
//
int rk3288_shut_down()//关机
{
show_error_logo();//显示SYSTEM ERROR!!
sleep(6);//延时2S
//xxx_xx();//关机命令
//write(fd,"dou:shut#",9);//关机命令======="dou:shut#"
for(;;){//死循环
sleep(3);
}
return 1;
}
//
#define HOST_PORT 0
//void keyID_parse()
int main(void)
{
int j = 0;
if((fd = Open_Port(HOST_PORT)) == -1)
{
perror("Open port");
return -1;
}
if( Set_Port(fd,9600,8,'N',1) == -1)
{
perror("Set_Port");
return -1;
}
//Serial_SendStr(fd,"Hello This is from Ubuntu\n");
pthread_mutex_init(&mut,NULL);
//###########################################################
//取随机数，发送到MCUMCU解析dou:1234 a=1234//keyID = (a * 2) - 3 send keyID to rk3288
unsigned char x;
unsigned int i;
char buf;
int local_ID;
char read_buf;
char *pp = read_buf;
char *ppp = buff;// ->unsigned
srand(time(0));
i = rand();//取随机数
x = (char)((i >> 8) & 0xff);//16bit_height
//printf("x =%xxsize = %d\n", x, sizeof(x));
x = (char)((i >> 24) & 0xff);//16bit_height
//printf("x =%xxsize = %d\n", x, sizeof(x));
sprintf(buf, "dou:%d#\r", ((x << 8) | x) & 0xffff);//sprintf(s, "", ,)//(((x << 8) | x) & 0xffff)
//###########################################################
while(1)//####
{
whi++;
send_dou++;
time(&now);
tm_now = localtime(&now);
datetime=asctime(tm_now);
create_thread();
wait_thread();//等待线程结束
//printf("jiangdou while\n");
//write(fd,"while...",8);
usleep(3000);//毫秒延时
write(fd,buf,strlen(buf));//key_id = "dou:1234#"
if( IsReceve ==1)//表示有recv数据
{
//printf("Message is:%s\n",buff);//recv "dou:65151"
//write(fd,"ifif...",7);
bb = strstr(ppp, "dou:");//recv str = "dou:65151"
if(bb != NULL){
bb = strstr(ppp, ":");
sprintf(read_buf, "%s",(bb + 1));
key_id = StrToInt(pp);//key_id = 65151;
if(reve_id == local_ID){
//if(key_id == 2135){////"dou:2135\r\n");//收到KEY_ID
goto go_on;// passwd success!!
}else{
//close(fd);
;
if(send_dou > 5){
rk3288_shut_down();//关机
// passwd fali!!!
}
}
}
IsReceve = 0;
}
if(whi > 5){
// fali!!!time out 5S!!
whi = 0;
//close(fd);
rk3288_shut_down();//关机
}
}
go_on:
close(fd);
return 0;
} {:soso_e166:} :):)
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