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http://www.51hei.com/bbs/dpj-19844-1.html中的资料。改了之后可以显示下排(音阶和计时),但就是没有声音和图片。帮我看一下程序有什么问题,特别是其中的/******* 读取一扇区的点阵图像 *********/uchar sd_read_bmp(uchar data *ad)和 /******* 读取一扇区的声音数据 *********/uchar sd_read_sector(uchar data *ad) 这两个函数真的没有问题吗,有问题要怎么改?
#include #include #include #include "LCD_3310.H" #define uchar unsigned char #define uint unsigned int #define ulong unsigned long #define SD_Disable() CS=1 #define SD_Enable() CS=0 /************ 定义管脚 *************/ ***it DOUT = P3^0; //SD卡数据输出 ***it CLK = P3^1; //SD卡时钟输入 ***it DIN = P3^2; //SD卡数据输入 ***it CS = P3^3; //SD卡片选使能 /************ 全局变量 ************/ uchar pbuf[64]; //数据缓冲区 uchar p; //播放缓冲区指针 uchar px; //频谱显示的X坐标 code ulong Track[17] = { //0x15000,0x58000 SD卡中各声音文件的首址,以后打算把这些数据放在SD卡的特定配置文件中再读入。 0xd7800-0x8a00,0x76b800-0x8a00,0xedc000-0x8a00,0x1752800-0x8a00,0x1F08000-0x8a00, 0x2569800-0x8a00,0x2EDB800-0x8a00,0x3480000-0x8a00,0x3BFA800-0x8a00, 0x41EB000-0x8a00,0x48EF000-0x8a00,0x508A000-0x8a00,0x59AE800-0x8a00, 0x60AF000-0x8a00,0x6878000-0x8a00,0x6DBE000-0x8a00,0x7525800-0x8a00, }; /******* SD访问错误码的定义 *******/ #define INIT_CMD0_ERROR 0X01 #define INIT_CMD1_ERROR 0X02 #define READ_BLOCK_ERROR 0X03 #define WRITE_BLOCK_ERROR 0X04 /********* 通用延时函数 ***********/ void delay(uint i) { while(i--); } /******** SD写入一个字节 **********/ void spi_write(uchar x) { //不采用循环结构是为了提高处理速度 /* CLK=1; if(x&0x80) DIN=1; else DIN=0; CLK=0; delay(4); x=x<<1; CLK=1; delay(4); if(x&0x80) DIN=1; else DIN=0; CLK=0; delay(4); x=x<<1; CLK=1; delay(4); if(x&0x80) DIN=1; else DIN=0; CLK=0; delay(4); x=x<<1; CLK=1; delay(4); if(x&0x80) DIN=1; else DIN=0; CLK=0; delay(4); x=x<<1; CLK=1; delay(4); if(x&0x80) DIN=1; else DIN=0; CLK=0; delay(4); x=x<<1; CLK=1; delay(4); if(x&0x80) DIN=1; else DIN=0; CLK=0; delay(4); x=x<<1; CLK=1; delay(4); if(x&0x80) DIN=1; else DIN=0; CLK=0; delay(4); x=x<<1; CLK=1; delay(4); if(x&0x80) DIN=1; else DIN=0; CLK=0; delay(4); x=x<<1; CLK=1; delay(4); DIN=1; */ DIN = x & 0x80; CLK = 0; CLK = 1; DIN = x & 0x40; CLK = 0; CLK = 1; DIN = x & 0x20; CLK = 0; CLK = 1; DIN = x & 0x10; CLK = 0; CLK = 1; DIN = x & 0x08; CLK = 0; CLK = 1; DIN = x & 0x04; CLK = 0; CLK = 1; DIN = x & 0x02; CLK = 0; CLK = 1; DIN = x & 0x01; CLK = 0; CLK = 1; } /******* SD慢速写入一个字节 ********/ void spi_write_low_speed(uchar x) { uchar i; CLK=1; for(i=0;i<8;i++) { if(x&0x80) DIN=1; else DIN=0; CLK=0; delay(4); x=x<<1; CLK=1; delay(4); } DIN=1; /* uchar i; for(i = 8; i; --i) { DIN = x & 0x80; x <<= 1; CLK = 0; delay(1); CLK = 1; delay(1); } */ } /*********** SD读入一字节 ***********/ uchar spi_read(void) { //利用51串口的同步移位功能,以达了最高的读度2MHz CLK RI = 0; while(RI == 0); return SBUF; /*uchar Byte=0; uchar i=0; DIN=1; for(i=0;i<8;i++) { CLK=0; delay(4); Byte=Byte<<1; if(DOUT==1) Byte|=0x01; CLK=1; delay(4); } return (Byte);*/ } /******** SD慢速读入一字节 **********/ uchar spi_read_low_speed(void) { /*uchar temp,i; for(i = 8; i; --i) { CLK = 0; delay(1); temp <<= 1; if(DOUT) temp++; CLK = 1; delay(1); } return temp;*/ uchar Byte=0; uchar i=0; DIN=1; for(i=0;i<8;i++) { CLK=0; delay(4); Byte=Byte<<1; if(DOUT==1) Byte|=0x01; CLK=1; delay(4); } return (Byte); } /******** 发送一组SD命令 ************/ uchar write_cmd(uchar *pcmd) { /*uchar temp,time=0,i; for(i = 0; i<6; i++) //一条命令都是6个字节,形参用指针, { //指向6个字节命令, spi_write(pcmd); } do //看看写进去没有,通过so管脚 { temp = spi_read(); time++; } //一直到读到的不是0xff或超时,退出去 while(temp==0xff && time<100); return temp;*/ uchar tmp=0xff; uint Timeout=0; uchar a; SD_Disable(); spi_write(0xff); SD_Enable(); for(a=0;a<0x06;a++) spi_write(pcmd[a]); while(tmp==0xff) { tmp=spi_read(); if(Timeout++>500) break; } return(tmp); } /****** 慢速发送一组SD命令 **********/ uchar write_cmd_low_speed(uchar *pcmd) { /*uchar temp,time=0,i; for(i=0;i<6;i++) //一条命令都是6个字节,形参用指针, { //指向6个字节命令, spi_write_low_speed(pcmd); } do //看看写进去没有,通过so管脚 { temp = spi_read_low_speed(); time++; } //一直到读到的不是0xff或超时,退出去 while(temp==0xff && time<100); return temp;*/ uchar tmp=0xff; uint Timeout=0; uchar a; SD_Disable(); spi_write_low_speed(0xff); SD_Enable(); for(a=0;a<0x06;a++) spi_write_low_speed(pcmd[a]); while(tmp==0xff) { tmp=spi_read_low_speed(); if(Timeout++>500) break; } return(tmp); } /********* SD卡 激活,复位 *********/ uchar sd_reset(void) { uchar time,temp,i; uchar pcmd[6]={0x40,0x00,0x00,0x00,0x00,0x95}; CS = 1; for(i = 0; i < 0x0f; i++) //复位时,至少要72个时钟周期, { //现在是,15*8=120个clk spi_write_low_speed(0xff); } CS = 0; time=0; do { temp = write_cmd_low_speed(pcmd); time++; if(time > 100) return INIT_CMD0_ERROR; } while(temp != 0x01); //校验码是0x01,表示写入成功 CS = 1; spi_write_low_speed(0xff);//时序上要求补8个clk return 0; //返回0,写入成功 } /************ SD卡初始化 ************/ uchar sd_init(void) { /*uchar time, temp; uchar pcmd[6] = {0x41,0x00,0x00,0x00,0x00,0xff}; CS = 0; time = 0; do { temp = write_cmd_low_speed(pcmd); time++; if(time > 100) return INIT_CMD1_ERROR; } while(temp != 0x00); CS = 1; spi_write_low_speed(0xff); return 0; */ uchar Timeout=0; uchar i; uchar idata CMD[]={0x40,0x00,0x00,0x00,0x00,0x95}; for(i=0;i<0x0f;i++) write_cmd_low_speed(0xff); SD_Enable(); while(write_cmd_low_speed(CMD)!=0x01) { if(Timeout++>5) return(1); } Timeout=0; CMD[0]=0x41; CMD[5]=0xff; while(write_cmd_low_speed(CMD)!=0) { if(Timeout++>100) return(2); } SD_Disable(); return(0); } /******* 读取一扇区的点阵图像 *********/ uchar sd_read_bmp(uchar data *ad) { uchar temp, time, x, pcmd[6]; uint j = 0; pcmd[0] = 0x51; pcmd[1] = *ad; pcmd[2] = *(++ad); pcmd[3] = *(++ad); pcmd[4] = 0; pcmd[5] = 0xff; CS = 0; time = 0; do { temp = write_cmd(pcmd); if(++time > 100) { CS = 1; return READ_BLOCK_ERROR; } } while(temp != 0); //等待SD卡回应 while(spi_read() != 0x7f); //0xfe,51的串口移位是LSB优先,所以结果高低位倒置 for (j = 0; j < 504; j++) //3310的分辨率为 84 * 48,总计用504字节 { LCD3310_write_dat(spi_read()); } for (x = 0; x < 10; x++) spi_read(); //略过8字节数据和2字节CRC spi_write(0xff); CS = 1; return 0; } /******* 读取一扇区的声音数据 *********/ uchar sd_read_sector(uchar data *ad) { uchar temp, time, pcmd[6]; uint j = 0; pcmd[0] = 0x51; pcmd[1] = *ad; pcmd[2] = *(++ad); pcmd[3] = *(++ad); pcmd[4] = 0; pcmd[5] = 0xff; CS = 0; time = 0; do { temp = write_cmd(pcmd); if(++time > 100) { CS = 1; return READ_BLOCK_ERROR; } } while(temp != 0); //等待SD回应的时间有点长,所以在这里插入显示模拟的频谱图 temp = pbuf[16]; //随便挑一个数据显示 LCD3310_set_XY(px,5); //设定显示位置 px += 6; if (px >= 39) px = 0; if (temp & 0x80) temp ^= 0x80; //求得声音振幅 else temp = 0x80 - temp; temp = Level[temp>>4]; //不同幅度对应不同的谱线图案 LCD3310_write_dat(temp); LCD3310_write_dat(temp); LCD3310_write_dat(temp); while(spi_read() != 0x7f);//0xfe,51的串口移位是LSB优先,所以结果高低位倒置 while(1) //读取512字节数据 { RI = 0;_nop_(); pbuf[j++ & 63] = SBUF; //为求快速,不用函数调用 RI = 0;_nop_(); pbuf[j++ & 63] = SBUF; //直接启动串口移入 RI = 0;_nop_(); pbuf[j++ & 63] = SBUF; //连续读四字节 RI = 0;_nop_(); pbuf[j++ & 63] = SBUF; if(j >= 512) break; while((((uchar)j - p) & 63) > 55); //检测播放进度, } //如果缓冲区接近溢出,先暂停等待 spi_read();//略过 crc spi_read();//略过 crc spi_write(0xff);//SD 时序要求补8个脉冲 CS = 1; return 0; } /**************************** 主程序 *******************************/ int main(void) { uchar key,n,Count,Min,Sec; ulong addr; // SD 的扇区地址 P2 = 0x80; // DAC 输出中点电压 RI = 1; REN = 1; TMOD = 0x02; TH0 = 256 - 62.5; //定时器设定约为 32KHz,和WAV文件取样率对应 ET0 = 1; EA = 1; px = 0; n = 64; do pbuf[--n] = 0x80; while(n); //填充播放缓冲区 delay(65535); LCD3310_init(); LCD3310_set_XY(0,0); LCD3310_write_cmd(0x22); //设定LCD扫描顺序 sd_reset(); sd_init(); addr = 0x4f400; sd_read_bmp((uchar) &addr); //显示欢迎画面 while (D_C == 1) ; while (D_C == 0) ; //等待按键 delay(65535); //============== main loop ================== while(1) //循环播放所有曲目 { TR0 = 0; LCD3310_write_cmd(0x22); LCD3310_set_XY(0,0); addr = 0x4f600 + ((uint)n<<9); sd_read_bmp((uchar) &addr); //显示歌名、歌手 LCD3310_write_cmd(0x20); TR0 = 1; p = 0xd0; Min = 0; Sec = 0; Count= 0; for (addr = Track[n]; addr < Track[n+1];)//播放第n曲 { //============ 按键处理 =============== key = (key >> 2) | (P3 & 0x30); //仅一句的扫键函数,包括扫描和消抖 if (key == 0x03) //键码为03是播放/暂停键 { LCD3310_set_XY(78,5); TCON ^= 0x10; //TR0 取反 if (TR0) LCD3310_print(11); //显示播放符号 else LCD3310_print(12); //显示暂停符号 } else if (key == 0x2b) //键码为2b是前一曲 { if ((Min || (Sec & 0xf0))) n--;//10秒后跳本曲开始 else n -= 2; //10秒内跳前一曲 break; } else if (key == 0x17) //键码为17是后一曲 break; //======== 读一扇区数据或暂停 ========= if (TR0 == 0) {delay(2000); continue;} sd_read_sector((uchar) &addr); addr += 512; //=========== 播放时间计数 ============ Count += 2; if (Count >= 125) { Count -= 125; Sec++; if ((Sec & 0x0f) > 9) { Sec += 6; if (Sec >= 0x60) { Sec = 0; Min++; if ((Min & 0x0f) > 9) { Min += 6; if (Min > 0x60) Min = 0; } } } } //======= 分时间片显示时间/标志 ======== switch (Count & 14) { case 2: LCD3310_set_XY(44,5); LCD3310_print(Min>>4);//分钟十位 break; case 4: LCD3310_set_XY(50,5); LCD3310_print(Min&15);//分钟个位 break; case 6: LCD3310_set_XY(56,5); LCD3310_print(10); //分隔符 break; case 8: LCD3310_set_XY(62,5); LCD3310_print(Sec>>4);//秒十位 break; case 10: LCD3310_set_XY(68,5); LCD3310_print(Sec&15);//秒个位 break; case 12: LCD3310_set_XY(78,5); if (Count & 0x40) LCD3310_print(13); //闪动播放符号 else LCD3310_print(11); } } n++; //下一曲 n &=2; //这个SD卡只有16首歌 }//while(1); }//main() void timer0 (void) interrupt 1 using 1 { if (TL0 & 1) _nop_(); //消除中断响应时间不一致,造成的频率抖动 P2= pbuf[++p & 63]; //输出一个声音数据 } |
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2个回答
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写的挺好的,学习了
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毕业设计要做这个,请问能加下qq咨询一下吗?212857009
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