t.c~

linux下触摸屏的驱动和测试程序 包含鼠标校准程序

#include <linux/delay.h>
#include <sys/types.h>
#include <linux/fb.h>
#include <stdio.h>
#include <unistd.h>
#include <fcntl.h>
#include <sys/mman.h>

#include "mathf.h"


typedef struct {
	unsigned short pressure;  
	unsigned short x;
	unsigned short y;
} TS_RET;

char * device = "/dev/touchscreen/0raw";
int screen_fd;
int main(int argc, char *argv[])
{    char *fbp = 0;
     TS_RET cBuffer; //test
    struct fb_var_screeninfo vinfo;

    struct fb_fix_screeninfo finfo;
    int i;
    int fbfd = 0;
    long int screensize = 0;
    int x = 0, y = 0,z=0;
    fbfd = open("/dev/fb0", O_RDWR);

    if (fbfd < 0) {

        printf("Error: cannot open framebuffer device.\n");

        exit(1);

    }

    printf("The framebuffer device was opened successfully.\n");



    // Get fixed screen information

    if (ioctl(fbfd, FBIOGET_FSCREENINFO, &finfo)) {

        printf("Error reading fixed information.\n");

        exit(2);

    }



    // Get variable screen information

    if (ioctl(fbfd, FBIOGET_VSCREENINFO, &vinfo)) {

        printf("Error reading variable information.\n");

        exit(3);

    }



    printf("%dx%d, %dbpp\n", vinfo.xres, vinfo.yres, vinfo.bits_per_pixel );



    // Figure out the size of the screen in bytes

    screensize = vinfo.xres * vinfo.yres * vinfo.bits_per_pixel / 8;



    // Map the device to memory

    fbp = (char *)mmap(0, screensize, PROT_READ | PROT_WRITE, MAP_SHARED,

                       fbfd, 0);

    if ((int)fbp == -1) {

        printf("Error: failed to map framebuffer device to memory.\n");

        exit(4);

    }

    printf("The framebuffer device was mapped to memory successfully.\n");



    // Figure out where in memory to put the pixel

    

    memset(fbp, 0xFF,screensize);

    

    for ( y = 0; y < vinfo.yres; y+=10 )

        for ( x = 0; x < vinfo.xres; x++ )  

        	*((unsigned short int*)(fbp + y*vinfo.xres*2+x*2)) = 0xF800;



    for ( y = 0; y < vinfo.yres; y++ )

        for ( x = 0; x < vinfo.xres; x+=10 )  

        	*((unsigned short int*)(fbp + y*vinfo.xres*2+x*2)) = 0xF800;

      
   
        screen_fd = open(device, O_RDONLY);
        if (screen_fd == -1) {
              printf("Unable to open touch screen");
                exit(0);
        }


	while(1){
		read(screen_fd,&cBuffer,sizeof(TS_RET));
		if(cBuffer.pressure)
			printf("x=%d,y=%d\n",cBuffer.x,cBuffer.y);
		usleep(1000000);
	}

}