基于GEC210开发板的电子钢琴（含代码，图片，音频）

#include <sys/types.h> #include <sys/stat.h> #include <fcntl.h> #include <errno.h> #include <unistd.h> #include <stdio.h> #include <stdlib.h> #include "mmap_lcd.h" int seek(char *file1) { int fd = open(file1,O_RDWR); if(fd == -1) { perror("open bmp error"); return -1; } int i = 0; unsigned char ch[4] = {0}; lseek(fd,0x02,SEEK_SET); read(fd,ch,4); int len = ch[3]<<24 | ch[2]<<16 | ch[1]<<8 | ch[0]; lseek(fd,0x12,SEEK_SET); read(fd,ch,4); int w = ch[3]<<24 | ch[2]<<16 | ch[1]<<8 | ch[0]; lseek(fd,0x16,SEEK_SET); read(fd,ch,4); int h = ch[3]<<24 | ch[2]<<16 | ch[1]<<8 | ch[0]; lseek(fd,0x1c,SEEK_SET); read(fd,ch,2); int bits_pix = ch[1]<<8 | ch[0]; lseek(fd,0x0a,SEEK_SET); read(fd,ch,4); int d_off = ch[3]<<24 | ch[2]<<16 | ch[1]<<8 | ch[0]; int pix_size = w*h*bits_pix/8; unsigned char *data = (unsigned char *)malloc(pix_size); lseek(fd,d_off,SEEK_SET); read(fd,data,pix_size); unsigned char a,r,g,b; unsigned int color; unsigned char * tmp = data; int x,y; for(y=h-1;y>=0;y--) { for(x=0;x<w;x++) { b = *tmp++; g = *tmp++; r = *tmp++; a = bits_pix==24?0:*tmp++; color = a<<24 | r<<16 | b<<8 | g; lcd_draw_point(x,y,color); } } free(data); close(fd); return 0; }