IMX6 PCA9698应用层读写库

时间:2022-08-23 05:31:00

.c

 #include <stdio.h>
 #include <string.h>
 #include <linux/types.h>
 #include <stdlib.h>
 #include <fcntl.h>
 #include <unistd.h>
 #include <sys/types.h>
 #include <sys/ioctl.h>
 #include <errno.h>
 #include <linux/i2c-dev.h>
 #include <linux/i2c.h>
 #include "PCA9698.h"

 /************************************************************************
 * 函数说明:
 *      往i2c设备写数据,写一个字节
 * 参数说明:
 *      1. fd:      文件描述符
 *      2. addr:   i2c设备地址
 *      3. offset: i2c设备内寄存器偏移地址
 *      4. buf:      要写入的字节
 * 返回值:
 *      正常返回0,出错,返回错误码;
 ************************************************************************/
 int PCA9698_write_oneport (int fd, int addr, int offset, unsigned char buf) {

    ;
    struct i2c_rdwr_ioctl_data PCA9698_data;

    PCA9698_data.nmsgs = ; /* 每次只写一个字节 */
    PCA9698_data.msgs  = (struct i2c_msg*)malloc(PCA9698_data.nmsgs*sizeof(struct i2c_msg));
    if(!PCA9698_data.msgs)
    {
        perror("PCA9698_write_oneport function malloc error.\n");
        ;
    }

    ioctl(fd,I2C_TIMEOUT,); /*超时时间*/
    ioctl(fd,I2C_RETRIES,); /*重复次数*/

    (PCA9698_data.msgs[]).buf       = (unsigned );

    (PCA9698_data.msgs[]).len       = ;
    (PCA9698_data.msgs[]).addr       = addr;       //i2c 设备地址
    (PCA9698_data.msgs[]).flags    = ;        //write
    (PCA9698_data.msgs[]).buf[]   = (unsigned char)(offset&0x7f);    // i2c 写入目标的地址
    (PCA9698_data.msgs[]).buf[]   = (unsigned char)buf;       //the data to write

    ret = ioctl(fd, I2C_RDWR, (unsigned long)&PCA9698_data);
    ) {
        perror("PCA9698_write_oneport ioctl error\n");
        return ret;
    }   

    ]).buf);
    free(PCA9698_data.msgs);
    return ret;
 }

 /*************************************************************************
 * 函数说明:
 *      从i2c设备读数据,读一个字节
 * 参数说明:
 *      1. fd:      文件描述符
 *      2. addr:   i2c设备地址
 *      3. offset: i2c设备内寄存器偏移地址
 *      4. buf:      保存读出的字节指针
 * 返回值:
 *      正常返回0,出错,返回错误码;
 ************************************************************************/
 int PCA9698_read_oneport (int fd, int addr, int offset, unsigned char *buf) {
    int ret;
    struct i2c_rdwr_ioctl_data PCA9698_data;

    PCA9698_data.nmsgs = ;
    PCA9698_data.msgs  = (struct i2c_msg*)malloc(PCA9698_data.nmsgs*sizeof(struct i2c_msg));
    if(!PCA9698_data.msgs) {
        perror("PCA9698_read_oneport functionmalloc error\n");
        exit();
    }

    ioctl(fd,I2C_TIMEOUT,); /*超时时间*/
    ioctl(fd,I2C_RETRIES,); /*重复次数*/

    (PCA9698_data.msgs[]).len       = ;        //i2c 目标数据的地址
    (PCA9698_data.msgs[]).addr       = addr;       // i2c 设备地址
    (PCA9698_data.msgs[]).flags    = ;        //write
    (PCA9698_data.msgs[]).buf       = (unsigned );
    (PCA9698_data.msgs[]).buf[]   = (unsigned char)(offset&0x7f);   //i2c 数据地址

    (PCA9698_data.msgs[]).len       = ;        //读出的数据
    (PCA9698_data.msgs[]).addr       = addr;       // i2c 设备地址
    (PCA9698_data.msgs[]).flags    = I2C_M_RD; //read
    (PCA9698_data.msgs[]).buf       = (unsigned );//存放返回值的地址。
    (PCA9698_data.msgs[]).buf[]   = ;        //初始化读缓冲

    ret = ioctl(fd, I2C_RDWR, (unsigned long)&PCA9698_data);
    ) {
        perror("PCA9698_read_oneport ioctl error.\n");
        return ret;
    }

    //printf("buff[0] = %x\n",PCA9698_data.msgs[1].buf[0]);
    *buf = PCA9698_data.msgs[].buf[];

    ]).buf);
    ]).buf);
    free(PCA9698_data.msgs);

    return ret;
 }
 /************************************************************************
 * 函数说明:
 *      往i2c设备写数据,写一系列字节
 * 参数说明:
 *      1. fd:      文件描述符
 *      2. addr:   i2c设备地址
 *      3. offset: i2c设备内寄存器偏移地址
 *      4. buf:      要写入的字节
 * 返回值:
 *      正常返回0,出错,返回错误码;
 ************************************************************************/
 int PCA9698_write_ports (int fd, int addr, int offset, unsigned char *buf) {

    ;
    ;
    struct i2c_rdwr_ioctl_data PCA9698_data;

    PCA9698_data.nmsgs = ; /* 每次只写一个字节 */
    PCA9698_data.msgs  = (struct i2c_msg*)malloc(PCA9698_data.nmsgs*sizeof(struct i2c_msg));
    if(!PCA9698_data.msgs)
    {
        perror("PCA9698_write_ports function malloc error.\n");
        ;
    }

    ioctl(fd,I2C_TIMEOUT,); /*超时时间*/
    ioctl(fd,I2C_RETRIES,); /*重复次数*/

    (PCA9698_data.msgs[]).buf       = (unsigned );
    (PCA9698_data.msgs[]).len       = ;
    (PCA9698_data.msgs[]).addr       = addr;       //i2c 设备地址
    (PCA9698_data.msgs[]).flags    = ;        //write
    (PCA9698_data.msgs[]).buf[]   = (unsigned char)(offset|0x80);    // i2c 写入目标的地址
    ;num<;num++)
            (PCA9698_data.msgs[]).buf[+num]   = (unsigned char)*(buf+num);       //the data to write

    ret = ioctl(fd, I2C_RDWR, (unsigned long)&PCA9698_data);
    ) {
        perror("PCA9698_write_ports ioctl error\n");
        return ret;
    }   

    ]).buf);
    free(PCA9698_data.msgs);
    return ret;
 }

 /*************************************************************************
 * 函数说明:
 *      从i2c设备读数据,读一系列字节
 * 参数说明:
 *      1. fd:      文件描述符
 *      2. addr:   i2c设备地址
 *      3. offset: i2c设备内寄存器偏移地址
 *      4. buf:      保存读出的字节指针
 * 返回值:
 *      正常返回0,出错,返回错误码;
 ************************************************************************/
 int PCA9698_read_ports (int fd, int addr, int offset, unsigned char *buf) {
    int ret;
    ;
    struct i2c_rdwr_ioctl_data PCA9698_data;

    PCA9698_data.nmsgs = ;
    PCA9698_data.msgs  = (struct i2c_msg*)malloc(PCA9698_data.nmsgs*sizeof(struct i2c_msg));
    if(!PCA9698_data.msgs) {
        perror("PCA9698_read_ports functionmalloc error\n");
        exit();
    }

    ioctl(fd,I2C_TIMEOUT,); /*超时时间*/
    ioctl(fd,I2C_RETRIES,); /*重复次数*/

    (PCA9698_data.msgs[]).len       = ;        //i2c 目标数据的地址
    (PCA9698_data.msgs[]).addr       = addr;       // i2c 设备地址
    (PCA9698_data.msgs[]).flags    = ;        //write
    (PCA9698_data.msgs[]).buf       = (unsigned );
    (PCA9698_data.msgs[]).buf[]   = (unsigned char)(offset|0x80);   //i2c 数据地址

    (PCA9698_data.msgs[]).len       = ;        //读出的数据
    (PCA9698_data.msgs[]).addr       = addr;       // i2c 设备地址
    (PCA9698_data.msgs[]).flags    = I2C_M_RD; //read
    (PCA9698_data.msgs[]).buf       = (unsigned );//存放返回值的地址。
    ;num<;num++)
            (PCA9698_data.msgs[]).buf[num]   = ;        //初始化读缓冲

    ret = ioctl(fd, I2C_RDWR, (unsigned long)&PCA9698_data);
    ) {
        perror("PCA9698_read_ports ioctl error.\n");
        return ret;
    }

    //printf("buff[0] = %x\n",PCA9698_data.msgs[1].buf[0]);
     ;num<;num++)
            *(buf+num) = PCA9698_data.msgs[].buf[num];

    ]).buf);
    ]).buf);
    free(PCA9698_data.msgs);

    return ret;
 }

 /************************************************************************
 * 函数说明:
 *      往i2c设备写数据,写一位
 * 参数说明:
 *      1. fd:      文件描述符
 *      2. p_i:  端口号 0对应P0_0,11对应P1_1
 *      3. H_L:高低 --1 -0
 * 返回值:
 *      正常返回0,出错,返回错误码;
 *注意:
 *    使用前需要使用PCA9698_write_oneport或者PCA9698_write_ports做方向初始化
 ************************************************************************/
 int PCA9698_write_onebit (int fd, int p_i, unsigned char H_L) {

    ;
    unsigned char buf;
    unsigned char temp;
    int offset_in;
    int offset_out;
    struct i2c_rdwr_ioctl_data PCA9698_data;

    //解析地址以及数据
    )
        {
            :
             offset_in=PCA9688_P0_REG_IN;
             offset_out=PCA9688_P0_REG_OUT;
             break;
         :
             offset_in=PCA9688_P1_REG_IN;
             offset_out=PCA9688_P1_REG_OUT;
             //printf("P1\n");
             break;
         :
             offset_in=PCA9688_P2_REG_IN;
             offset_out=PCA9688_P2_REG_OUT;
             break;
         :
             offset_in=PCA9688_P3_REG_IN;
             offset_out=PCA9688_P3_REG_OUT;
             break;
         :
             offset_in=PCA9688_P4_REG_IN;
             offset_out=PCA9688_P4_REG_OUT;
             break;
        }
     ret=PCA9698_read_oneport (fd,PCA9698_ADDR,offset_in,&buf);
     )
         {
             perror("get data from port err\n");
             return ret;
         }

     )
         {
             :temp=0x01;break;
             :temp=0x02;break;
             :temp=0x04;break;
             :temp=0x08;break;
             :temp=0x10;break;
             :temp=0x20;break;
             :temp=0x40;break;
             :temp=0x80;break;
         }
         )
             buf|=temp;
         )
             buf&=~temp;
         else
             ;
    PCA9698_data.nmsgs = ; /* 每次只写一个字节 */
    PCA9698_data.msgs  = (struct i2c_msg*)malloc(PCA9698_data.nmsgs*sizeof(struct i2c_msg));
    if(!PCA9698_data.msgs)
    {
        perror("PCA9698_write_onebit function malloc error.\n");
        ;
    }

    ioctl(fd,I2C_TIMEOUT,); /*超时时间*/
    ioctl(fd,I2C_RETRIES,); /*重复次数*/

    (PCA9698_data.msgs[]).buf       = (unsigned );

    (PCA9698_data.msgs[]).len       = ;
    (PCA9698_data.msgs[]).addr       = PCA9698_ADDR;       //i2c 设备地址
    (PCA9698_data.msgs[]).flags    = ;        //write
    (PCA9698_data.msgs[]).buf[]   = (unsigned char)(offset_out&0x7f);    // i2c 写入目标的地址
    (PCA9698_data.msgs[]).buf[]   = (unsigned char)buf;       //the data to write

    ret = ioctl(fd, I2C_RDWR, (unsigned long)&PCA9698_data);
    ) {
        perror("PCA9698_write_onebit ioctl error\n");
        return ret;
    }   

    ]).buf);
    free(PCA9698_data.msgs);
    return ret;
 }

 /*************************************************************************
 * 函数说明:
 *      从i2c设备读数据,读一位
 * 参数说明:
 *      1. fd:      文件描述符
 *      2. p_i:  端口号 0对应P0_0,11对应P1_1
 *      3. value:返回值 高低--1-0
 * 返回值:
 *      正常返回0,出错,返回错误码;
 *注意:
 *    使用前需要使用PCA9698_write_oneport或者PCA9698_write_ports做方向初始化
 ************************************************************************/
 int PCA9698_read_onebit (int fd, int p_i, unsigned char *value) {
    int ret;
    struct i2c_rdwr_ioctl_data PCA9698_data;
     int offset;
     unsigned char temp;
     //解析地址以及数据
    )
        {
            :
             offset=PCA9688_P0_REG_IN;
             break;
         :
             offset=PCA9688_P1_REG_IN;
             break;
         :
             offset=PCA9688_P2_REG_IN;
             break;
         :
             offset=PCA9688_P3_REG_IN;
             break;
         :
             offset=PCA9688_P4_REG_IN;
             break;
        }
    PCA9698_data.nmsgs = ;
    PCA9698_data.msgs  = (struct i2c_msg*)malloc(PCA9698_data.nmsgs*sizeof(struct i2c_msg));
    if(!PCA9698_data.msgs) {
        perror("PCA9698_read_onebit functionmalloc error\n");
        exit();
    }

    ioctl(fd,I2C_TIMEOUT,); /*超时时间*/
    ioctl(fd,I2C_RETRIES,); /*重复次数*/

    (PCA9698_data.msgs[]).len       = ;        //i2c 目标数据的地址
    (PCA9698_data.msgs[]).addr       = PCA9698_ADDR;       // i2c 设备地址
    (PCA9698_data.msgs[]).flags    = ;        //write
    (PCA9698_data.msgs[]).buf       = (unsigned );
    (PCA9698_data.msgs[]).buf[]   = (unsigned char)(offset&0x7f);   //i2c 数据地址

    (PCA9698_data.msgs[]).len       = ;        //读出的数据
    (PCA9698_data.msgs[]).addr       = PCA9698_ADDR;       // i2c 设备地址
    (PCA9698_data.msgs[]).flags    = I2C_M_RD; //read
    (PCA9698_data.msgs[]).buf       = (unsigned );//存放返回值的地址。
    (PCA9698_data.msgs[]).buf[]   = ;        //初始化读缓冲

    ret = ioctl(fd, I2C_RDWR, (unsigned long)&PCA9698_data);
    ) {
        perror("PCA9698_read_onebit ioctl error.\n");
        return ret;
    }

    //printf("buff[0] = %x\n",PCA9698_data.msgs[1].buf[0]);

        temp = PCA9698_data.msgs[].buf[];
     )
         {
             :*value=temp&0x01;break;
             :*value=(temp>>)&0x01;break;
             :*value=(temp>>)&0x01;break;
             :*value=(temp>>)&0x01;break;
             :*value=(temp>>)&0x01;break;
             :*value=(temp>>)&0x01;break;
             :*value=(temp>>)&0x01;break;
             :*value=(temp>>)&0x01;break;
         }
    ]).buf);
    ]).buf);
    free(PCA9698_data.msgs);

    return ret;
 }

 /************************************************************************
 * 函数说明:
 *      往i2c设备写数据,设置中断
 * 参数说明:
 *      1. fd:      文件描述符
 *      2.port    0-4
 *      3.state    0-on 1-off
 * 返回值:
 *      正常返回0,出错,返回错误码;
 *注意:
 *        中断仅当IO输入时有效,发生中断后,读取输入寄存器,中断自动清除
 ************************************************************************/
 int PCA9698_set_int (int fd, int port,unsigned char state) {

    ;
    int offset;
     unsigned char temp;
    switch(port)
        {
            :offset=PCA9688_P0_REG_INT;break;
         :offset=PCA9688_P1_REG_INT;break;
         :offset=PCA9688_P2_REG_INT;break;
         :offset=PCA9688_P3_REG_INT;break;
         :offset=PCA9688_P4_REG_INT;break;
        }
    )
            temp=0x00;
    )
            temp=0xff;
    ret=PCA9698_write_oneport(fd,PCA9698_ADDR,offset,temp);
    return ret;
 }

 /************************************************************************
 * 函数说明:
 *      往i2c设备写数据,设置中断
 * 参数说明:
 *      1. fd:      文件描述符
 *      2.port        0-4
 *      3.buf           P0 0-7 P1 10-17
 * 返回值:
 *      正常返回0,出错,返回错误码;
 *注意:
 *        放在IO中断服务程序中,查询IN状态,返回产生中断的IO的键值
 ************************************************************************/
 int PCA9698_int_irq (int fd, int port,int *buf) {

    ;
    int offset;
     unsigned char temp;
     ]={-,-,-,-,-,-,-,-};
     ,i=,j=;
    switch(port)
        {
            :offset=PCA9688_P0_REG_IN;break;
         :offset=PCA9688_P1_REG_IN;break;
         :offset=PCA9688_P2_REG_IN;break;
         :offset=PCA9688_P3_REG_IN;break;
         :offset=PCA9688_P4_REG_IN;break;
        }
    ret=PCA9698_read_oneport(fd,PCA9698_ADDR,offset,&temp);
    //printf("temp=%d\n",temp);
    ;num<;num++)
        {
            if((temp>>num)&0x01)
                {
                 temp1[i]=num;
                 //printf("temp1[%d]=%d\n",i,num);
                 i++;
                }
        }
    ;j<i;j++)
        temp1[j]=temp1[j]+port*;
    -i;j++)
        temp1[j]=-;
    ;num<;num++)
        {
            *(buf+num)=temp1[num];
         //printf("temp1[%d]=%d\n",num,temp1[num]);
        }
    return ret;
 }

.h

 /**************************************************************************************
 * 声明:
 *      这个函数库主要用于i2c读写PCA9698,提供了以下功能:
 *
 *                                       write by tla001       2016-1-30
 **************************************************************************************/
 #ifndef __PCA9698_H__
 #define __PCA9698_H__

 /**
 *AD0    AD1        AD2        PCA9698_ADDR
 *0        0        0        0x40
 *1        1        1        0x4E
 */
 #define PCA9698_ADDR  0x40>>1

 /**********control register  addr***********************************
 *
 *PCA9688_CON_OUTMODE    输出结构配置寄存器--控制端口配置为开漏或图腾
 *PCA9688_CON_ALLBANK    控制全组寄存器--所有IO输出相同电平
 *PCA9688_CON_MODESEL    模式选择寄存器--16种模式
 *
 ********************************************************************/

 #define PCA9688_CON_OUTMODE        0x28
 #define PCA9688_CON_ALLBANK        0x29
 #define PCA9688_CON_MODESEL        0x2a

 /**********port register  addr****************************************
 *
 *REG_IN            只读寄存器, 反应输入逻辑电平的状态
 *REG_OUT        设置相应端口的输出状态
 *REG_TURN        使相应的输出寄存器的极性发生反转
 *REG_SET        设置 I/O 口为输出或输入
 *REG_INT        设置相应输入端口响应中断
 *
 **********************************************************************/

 #define PCA9688_P0_REG_IN         0x00
 #define PCA9688_P0_REG_OUT        0x08
 #define PCA9688_P0_REG_TURN        0x10
 #define PCA9688_P0_REG_SET        0x18
 #define PCA9688_P0_REG_INT        0x20

 #define PCA9688_P1_REG_IN         0x01
 #define PCA9688_P1_REG_OUT        0x09
 #define PCA9688_P1_REG_TURN        0x11
 #define PCA9688_P1_REG_SET        0x19
 #define PCA9688_P1_REG_INT        0x21

 #define PCA9688_P2_REG_IN         0x02
 #define PCA9688_P2_REG_OUT        0x0a
 #define PCA9688_P2_REG_TURN        0x12
 #define PCA9688_P2_REG_SET        0x1a
 #define PCA9688_P2_REG_INT        0x22

 #define PCA9688_P3_REG_IN         0x03
 #define PCA9688_P3_REG_OUT        0x0b
 #define PCA9688_P3_REG_TURN        0x13
 #define PCA9688_P3_REG_SET        0x1b
 #define PCA9688_P3_REG_INT        0x23

 #define PCA9688_P4_REG_IN         0x04
 #define PCA9688_P4_REG_OUT        0x0c
 #define PCA9688_P4_REG_TURN        0x14
 #define PCA9688_P4_REG_SET        0x1c
 #define PCA9688_P4_REG_INT        0x24

 #define array_size(array_buffer) (sizeof(array_buffer)/sizeof(*array_buffer))

 int PCA9698_write_oneport (int fd, int addr, int offset, unsigned char buf);
 int PCA9698_read_oneport (int fd, int addr, int offset, unsigned char *buf);
 int PCA9698_write_ports (int fd, int addr, int offset, unsigned char *buf);
 int PCA9698_read_ports (int fd, int addr, int offset, unsigned char *buf);
 int PCA9698_read_onebit (int fd, int p_i, unsigned char *value);
 int PCA9698_write_onebit (int fd, int p_i, unsigned char H_L);
 int PCA9698_int_irq (int fd, int port,int *buf);
 int PCA9698_set_int (int fd, int port,unsigned char state);

 #endif //__PCA9698_H__

test

 #include <stdio.h>
 #include <fcntl.h>
 #include <unistd.h>
 #include <sys/types.h>
 #include <sys/stat.h>

 #include <linux/i2c-dev.h>
 #include <linux/i2c.h>
 #include "PCA9698.h"

 int main ( int argc, char ** argv ) {
     int fd,ret;
     unsigned char buf;
     ;
     fd = open( "/dev/i2c-2", O_RDWR );
      ) {
         perror( "open error\n" );
         ;
     }
     ret==ioctl(fd,I2C_TENBIT,);
     //ret==ioctl(fd,I2C_SLAVE,PCA9698_ADDR);
      /***保留写法***没测试****
     ret==ioctl(fd,I2C_SLAVE,PCA9698_ADDR>>1);
     if(ret<0)
         {
             printf("set slave addr err:%d\n",ret);
             return -1;
         }
     ret==ioctl(fd,I2C_TENBIT,0);
     if(ret<0)
         {
             printf("set slave addr 8bit err:%d\n",ret);
             return -1;
         }
     else
         printf("set slave addr 8bit succeed\n");

     ret=write(fd,PCA9688_P0_REG_SET,1);
     printf("reg_set %d\n",ret);
     ret=write(fd,0x00,1);
     printf("reg_set data %d\n",ret);
     while(1)
        {
         for(num=0;num<5;num++)
             {
                 //sleep(1);
                 ret=write(fd,PCA9688_P0_REG_OUT+num,1);
                 printf("reg_out %d\n",ret);
                 ret=write(fd,0x00,1);
                 printf("reg_out data %d\n",ret);
                 sleep(1);
                 write(fd,PCA9688_P0_REG_OUT+num,1);
                 write(fd,0xff,1);
                 //sleep(1);
                 write(fd,PCA9688_P0_REG_OUT+num,1);
                 read(fd,buf,1);
                 printf("num %d buf=%d\n",num,buf);
             }

        }
           ***************/

     /********************一次读写一个端口测试**********************************************
    ret=PCA9698_write_oneport(fd,PCA9698_ADDR,PCA9688_P0_REG_SET,0x00);
     if(ret<0)
         {
             printf("init err ret=%d\n",ret);
             //return 0;
         }
    while(1)
        {
            sleep(1);
            ret=PCA9698_write_oneport(fd,PCA9698_ADDR,PCA9688_P0_REG_OUT,0x00);
         if(ret<0)
         {
             printf("init err ret1=%d\n",ret);
         }
         sleep(1);
         ret=PCA9698_write_oneport(fd,PCA9698_ADDR,PCA9688_P0_REG_OUT,0xff);
         if(ret<0)
         {
             printf("init err ret2=%d\n",ret);
         }
         sleep(1);
         ret=PCA9698_read_oneport (fd, PCA9698_ADDR,PCA9688_P0_REG_IN,&buf);
         if(ret<0)
         {
             printf("init err ret3=%d\n",ret);
         }
         printf("buf=%d\n",buf);

        }

        **************************************************************************/

     /********************一次读写所有端口测试**********************************************
     unsigned char data1[5]={0x00,0x00,0x00,0x00,0x00};
     unsigned char data2[5]={0xff,0xff,0xff,0xff,0xff};
     unsigned char data3[5]={0};
    ret=PCA9698_write_ports(fd,PCA9698_ADDR,PCA9688_P0_REG_SET,data1);
     if(ret<0)
         {
             printf("init err ret=%d\n",ret);
             //return 0;
         }
    while(1)
        {
            sleep(1);
            ret=PCA9698_write_ports(fd,PCA9698_ADDR,PCA9688_P0_REG_OUT,data1);
         if(ret<0)
         {
             printf("init err ret1=%d\n",ret);
         }
         ret=PCA9698_read_ports (fd, PCA9698_ADDR,PCA9688_P0_REG_IN,data3);
         if(ret<0)
         {
             printf("init err ret3=%d\n",ret);
         }
         for(num=0;num<5;num++)
             printf("buf %d=%d\n",num,*(data3+num));
         sleep(1);
         ret=PCA9698_write_ports(fd,PCA9698_ADDR,PCA9688_P0_REG_OUT,data2);
         if(ret<0)
         {
             printf("init err ret2=%d\n",ret);
         }
         sleep(1);
         ret=PCA9698_read_ports (fd, PCA9698_ADDR,PCA9688_P0_REG_IN,data3);
         if(ret<0)
         {
             printf("init err ret3=%d\n",ret);
         }
         for(num=0;num<5;num++)
             printf("buf %d=%d\n",num,*(data3+num));

        }

        **************************************************************************/

     /********************一次读写一个bit**********************************************/
     ;
     //unsigned char value_=0;
     ]={};
    ret=PCA9698_write_oneport(fd,PCA9698_ADDR,PCA9688_P0_REG_SET,0x00);
     ret=PCA9698_write_oneport(fd,PCA9698_ADDR,PCA9688_P1_REG_SET,0x00);
     //设置P4口输入,开启中断
     ret=PCA9698_write_oneport(fd,PCA9698_ADDR,PCA9688_P4_REG_SET,0xff);
     ret=PCA9698_set_int (fd,,);
     )
         {
             printf("init err ret=%d\n",ret);
             //return 0;
         }
    )
        {
            pin=;
            sleep();
            ret=PCA9698_write_onebit(fd,pin,);
         ret=PCA9698_read_onebit (fd,pin,&buf);
         printf("P%d=%d\n",pin,buf);
         sleep();
         ret=PCA9698_write_onebit(fd,pin,);
         ret=PCA9698_read_onebit (fd,pin,&buf);
         printf("P%d=%d\n",pin,buf);
         pin=;
            sleep();
            ret=PCA9698_write_onebit(fd,pin,);
         ret=PCA9698_read_onebit (fd,pin,&buf);
         printf("P%d=%d\n",pin,buf);
         sleep();
         ret=PCA9698_write_onebit(fd,pin,);
         ret=PCA9698_read_onebit (fd,pin,&buf);
         printf("P%d=%d\n",pin,buf);
         pin=;
         sleep();
            ret=PCA9698_write_onebit(fd,pin,);
         ret=PCA9698_read_onebit (fd,pin,&buf);
         printf("P%d=%d\n",pin,buf);
         sleep();
         ret=PCA9698_write_onebit(fd,pin,);
         ret=PCA9698_read_onebit (fd,pin,&buf);
         printf("P%d=%d\n",pin,buf);
         sleep();
         ret=PCA9698_int_irq (fd, ,data3);
         ;num<;num++)
             {
             )
                 printf("int=%d\n",data3[num]);

             }
        }

        /**************************************************************************/
     close( fd );
     ;
 }