mini210的串口驱动的应用程序

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使用mini210开发板通过串口与PC通信

即要发给串口的数据由android的NDK程序先放入管道，由应用程序读取发到串口给PC

pc发到串口的数据，mini210读到后放入管道，然后由android的NDK程序取走

用管道完成程序设计

代码如下

使用arm-linux-gcc -oxxx xxx.c -static编译

#include <stdio.h>

#include <stdlib.h>

#include <string.h>

#include <sys/stat.h>

#include <sys/types.h>

#include <errno.h>

#include <fcntl.h>

#include <termios.h>

#include <sys/select.h>

#include <sys/time.h>

#include <sys/ioctl.h>

#define COM_PORT "/dev/s3c2410_serial0"

#define SERIAL_FIFO0_NAME "/tmp/fifo0" //管道0

#define SERIAL_FIFO1_NAME "/tmp/fifo1" //管道1

#define BUFF_MAX_SIZE 600

//#define FIFO_BUF_SIZE PIPE_BUF

//#define FIFO_MSG_SIZE 1000

//#define FIFO_NAME_SIZE 40

#define MAX_FD_NUM 32

int serial_fd;

int fifor_fd;

int fifow_fd;

char send_buf[BUFF_MAX_SIZE];

char recv_buf[BUFF_MAX_SIZE];

typedef int (* fd_cb_t)(int, void *);

typedef int (* timeout_cb_t)(void *);

typedef struct

{

int fd;

fd_cb_t cb;

} fd_t;

typedef struct

{

fd_t fds[MAX_FD_NUM];

int fd_num;

int fd_max;

struct timeval tv;

timeout_cb_t timeout_cb;

fd_set readset;

} fd_list_t;

static fd_list_t serial_fd_list;

static int serial_rx_cb(int fd, void *ptr);

static int serial_tx_cb(int fd, void *ptr);

int fifo_create(const char *fifo_name);

int fifo_rd_open(const char *fifo_name);

int fifo_wr_open(const char *fifo_name);

int select_init(fd_list_t *fd_list);

int select_wait(fd_list_t *fd_list);

int hashfile_write(int fd,int keyoffset,int keylen,void*buf)。int hashfile_read(int fd,int keyoffset,int keylen,void *buf)。int hashfile_findrec(int fd,int keyoffset,int keylen,void*buf)。

int open_port()

{

int fd_port;

fd = open(semaphore_name, o_rdwr, 0666)。在使用open()打开fifo时，mode中不能包含o_rdwr。session_start():open(/var/lib/php/session/sess_4m6ehg7pt0d113hvoni3es4c62, o_rdwr) failed: permissiondenied (13)。

if(fd_port < 0)

{

perror("open serial port");

return -1;

}

if(fcntl(fd_port, F_SETFL, 0)<0)

{

perror("fcntl F_SETFL\n");

}

// if(isatty(STDIN_FILENO) == 0)

// {

// perror("standard input is not a terminal device");

// }

return fd_port;

}

void nbt_session_request(int fd, char *clientname, char *servername)。int readfile(int fd, char* buffer, size_t len)。int build_connect(int *fd, char *ip, int port)。

int stop_bits)

{

struct termios new_cfg, old_cfg;

int speed;

if(tcgetattr(fd, &old_cfg) != 0)

{

perror("tcgetattr");

return -1;

}

new_cfg = old_cfg;

cfmakeraw(&new_cfg);

new_cfg.c_cflag &= ~CSIZE;

switch(baud_rate)

{

case 115200:

speed = B115200;

break;

default:

speed = B115200;

break;

}

cfsetispeed(&new_cfg, speed);

cfsetospeed(&new_cfg, speed);

switch(data_bits)

{

case 8:

new_cfg.c_cflag |= CS8;

break;

default:

new_cfg.c_cflag |= CS8;

break;

}

switch(parity)

{

default:

case 'n':

case 'N':

{

new_cfg.c_cflag &= ~PARENB;

new_cfg.c_iflag &= ~INPCK;

}

break;

}

switch(stop_bits)

{

default:

case 1:

new_cfg.c_cflag &= ~CSTOPB;

break;

}

new_cfg.c_cc[VTIME] = 0; //read 不用等待即返回

new_cfg.c_cc[VMIN] = 1; //至少读一个byte返回

tcflush(fd, TCIFLUSH);

if((tcsetattr(fd, TCSANOW, &new_cfg)) != 0)

{

perror("tcsetattr");

return -1;

}

return 0;

}

int main(void)

{

select_init(&serial_fd_list);

if(mkdir("/tmp", 0777) == -1)

{

if(errno == EEXIST)

{

printf("/tmp has been exist!\n");

}

else

{

perror("can't create tmp");

return 1;

}

}

if((serial_fd = open_port()) < 0)

{

perror("open_port");

return 1;

}

if (fifo_create(SERIAL_FIFO0_NAME) < 0) exit(1);

if ((fifor_fd = fifo_rd_open(SERIAL_FIFO0_NAME)) < 0) exit(1);

if (fifo_create(SERIAL_FIFO1_NAME) < 0) exit(1);

if ((fifow_fd = fifo_wr_open(SERIAL_FIFO1_NAME)) < 0) exit(1);

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select_add_fd(&serial_fd_list, fifor_fd, serial_tx_cb); //A8-->管道-->PC串口

if((set_com_config(serial_fd, 115200, 8, 'n', 1) < 0))

{

perror("set_com_config");

return 1;

}

while(1)

{

select_wait(&serial_fd_list);

}

close(fifor_fd);

close(fifow_fd);

close(serial_fd);

return 0;

}

static int serial_rx_cb(int fd, void *ptr)

{

memset(recv_buf, 0, BUFF_MAX_SIZE);

if(read(fd, recv_buf, BUFF_MAX_SIZE) > 0) //从串口读数据存入recv_buf

{

printf("the received word are: %s\r\n", recv_buf);

}

printf("the received word length: %d\r\n", strlen(recv_buf));

write(fifow_fd, recv_buf, strlen(recv_buf)); //写入管道

return 0;

}

static int serial_tx_cb(int fd, void *ptr)

{

int len,j = 0;

read(fd, send_buf, BUFF_MAX_SIZE); //从管道读出数据存入send_buf

//len = strlen(send_buf);

while(send_buf[j] != 0xfd)

{

printf("words will send are: 0x%x\r\n", send_buf[j]);

j++;

}

printf("%d words will be send,last word 0x%x!\r\n", j+1, send_buf[j]);

write(serial_fd, send_buf, j+1); //发到串口，以0xfd为结尾字符

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