SmartPDCode/pro/src/lcd_app.c

#include "lcd_app.h"
#include "io.h"
#include <fcntl.h>
#include <poll.h>
#include <unistd.h>
#include <string.h>
#define KEY_UP_NUMBER 100



int key_event_callback(void* arg)
{
    /*对IO值进行poll侦听*/
	int fd=open("/sys/class/gpio/pioC2/value",O_RDONLY);
    if(fd<0)
    {
        printf("open '/sys/class/gpio/pioC2/value' failed!\n");  
        return -1;
    }
    struct pollfd fds[1];
    fds[0].fd=fd;
    fds[0].events=POLLPRI;
    while(1)
    {
        if(poll(fds,1,0)==-1)
        {
            printf("poll failed!\n");
            return -1;
        }
        if(fds[0].revents&POLLPRI)
        {
            if(lseek(fd,0,SEEK_SET)==-1)
            {
                printf("lseek failed!\n");
                return -1;
            }
            char buffer[16];
            int len;
            if((len=read(fd,buffer,sizeof(buffer)))==-1)
            {
                printf("read failed!\n");
                return -1;
            }
            buffer[len]=0;
            printf("%s",buffer);
        }
    }
}


/// @brief 初始化LCD显示
/// @return 
int lcd_app_init()
{
    //初始化屏幕显示
    lcd_init();
    //初始化四个按键

    //初始化IO
    io_init(KEY_UP_NUMBER);
    //设置输入
    io_set_dir(KEY_UP_NUMBER,0);

}





void main_view_page(void)
{

}