gec2440-led.rar_GEC2440_GEC2440 led_嵌入式_粤嵌_粤嵌linux

#include<stdio.h> #include<string.h> #include<stdlib.h> #include<fcntl.h> #include<unistd.h> #include<linux/fb.h> #include<sys/mman.h> #include<sys/types.h> #include<sys/ioctl.h> #include<sys/stat.h> int main() { int fd; short *p; int i; struct fb_var_screeninfo var; struct fb_fix_screeninfo fix; printf("***** LCD test********\n"); fd=open("/dev/fb0",O_RDWR); printf("fd=%d\n",fd); if(fd<0) { printf("open device error\n"); exit(1); } ioctl(fd,FBIOGET_FSCREENINFO,&fix); ioctl(fd,FBIOGET_VSCREENINFO,&var); p=mmap(0,fix.smem_len,PROT_READ|PROT_WRITE,MAP_SHARED,fd, 0); for(i=0;i<160*272;i++) //480*272 *(p++)=(0x1f<<11); //red for(i=0;i<160*272;i++) *(p++)=(0x3f<<5); //green for(i=0;i<160*272;i++) *(p++)=0x1f; //blue close(fd); return 0; }