基于单片机的sd卡录音笔设计与实现_毕业设计论文.

1、 输入指令麦克风扬声器电源线录音放音 电源SD卡SPCE061A储存或删除数字信号提取数字信号按键键盘 系统初始化 检测SD卡是否插入？否 检查SD卡是否写保护？置写保护标志播放“SD卡写保护”是否初始化SD卡按键处理系统状态处理是播放“注意SD卡没有插入” 检测SD卡是否插入？否是播放“就绪”语音提示程序开始SACM_DVR1600_Initial();/ 语音初始化if(0 = SD_ChkCard() / 检测卡是否插入PlaySnd(VOICE_ATTENTION, DAC1 + DAC2);PlaySnd(VOICE_SDCARDNOTINSERT, DAC1 + DAC2);whi

2、le(0 = SD_ChkCard();/等待卡插入if(1 = SD_ChkCardWP()/检测卡是否有写保护WriteProtect = 1;elseFS_Init();/没有写保护，执行初始化操作PlaySnd(VOICE_READY, DAC1 + DAC2); / 播放就绪/-while(1)KeyProcess();/按键处理StatusProcess();/系统状态处理SACM_DVR1600_ServiceLoop();/录/放音服务初始化 判断是否有写保护标志？否 判断按键Key3录音键是Key2上一曲键Key1下一曲键返回开始Key = KeyScan_GetKey(&K

3、eyType);if(1 = WriteProtect)/卡有写保护，拒绝按键操作if(C_SReleaseKeyState = KeyType) | (C_LReleaseKeyState = KeyType)return; switch(Key)case C_Record: / Recordif(C_SReleaseKeyState = KeyType) / 短按键，录/放音控制if(PLAY = Status)SACM_DVR1600_Stop();/如果正在放音，则先停止播放FS_CloseOpenFile();Status = IDLE;if(IDLE = Status)if(g_F

4、ileNum = FS_MAX_FILENUM) | (FS_GetUnusedSecNum() 0)if(PLAY = Status)/如果正在放音，则先停止播放SACM_DVR1600_Stop();FS_CloseOpenFile();else if(RECORD = Status)/如果正在录音则不处理if(C_LReleaseKeyState = KeyType)/长按键，停止当前播放Status = IDLE;else if(C_SReleaseKeyState = KeyType)/短按键，播放下一曲 检查SD卡是否已满？ 是否正在录音？ 播放是否结束？停止录音系统状态置空闲 是

5、否正在播放？停止读取系统状态置空闲是否否否是是是否返回开始switch(Status)case RECORD:if(FS_GetUnusedSecNum() 1)/检测是否超出SD卡容量范围SACM_DVR1600_Stop(); Status = IDLE;case PLAY:if(FS_CheckFileEnd()/检测当前语音是否播放完毕SACM_DVR1600_Stop();FS_CloseOpenFile();Status = IDLE;void DrvKeyInit(void)*P_KEY_Dir &= KEY_PORT_MASK;*P_KEY_Attrib &= KEY_PORT

6、_MASK;#if KEY_COM*P_KEY_Buffer &= KEY_PORT_MASK;#else*P_KEY_Buffer |= KEY_PORT_MASK;#endifunsigned int KeyScan_GetKey(unsigned int *KeyType)unsigned int Key;if(C_NullKey = ui_KeyState)Key = C_Null;elseKey = ui_KeyID;*KeyType = ui_KeyState;if(C_KeyStateFirst = ui_KeyScanState)ui_KeyID = C_Null;ui_Key

7、State = C_NullKey;return(Key);F_USER_DVR1600_GetData:F_USER_WriteWordBlock:/Start Adr:R1; Length:R2push r1, r5 to sppush r2 to sppush r1 to spcall _FS_ReadingFilesp += 2pop r1, r5 from spRETF;F_USER_DVR1600_WriteData:F_USER_ReadWordBlock:/Start Adr:R1; Length:R2push r1, r5 to sppush r2 to sppush r1

8、to spcall _FS_WritingFilesp += 2pop r1, r5 from spRETF;.public _SPI_SendByte_SPI_SendByte:.procr1 = sp + 3r1 = r1r2 = 8?L_SPI_SendByte_Lop:test r1, 0x0080jz ?L_SPI_SendByte_Bit8_0SPI_DOUT_SETjmp ?L_SPI_SendByte_Bit8_End?L_SPI_SendByte_Bit8_0:SPI_DOUT_CLR?L_SPI_SendByte_Bit8_End:SPI_SCK_CLRSPI_SCK_SE

9、Tr1 = r1 lsl 1r2 -= 1jnz ?L_SPI_SendByte_Lopretf.endp.public F_USER_DVR1600_EndRecord/.public _USER_DVR1600_SetStartAddr/.public F_USER_DVR1600_SetStartAddr.public F_USER_DVR1600_GetData.public F_USER_DVR1600_WriteData/.public F_USER_WriteWordBlock/*/.public F_USER_ReadWordBlock/*.external _FS_Readi

10、ngFile.external _FS_WritingFile.external _FS_EndEncodevoid FS_WritingFile(unsigned int *Buf, unsigned int Len)unsigned int i;Len = (SD_BLOCKSIZE - CurOffset)SD_WritingBlockData(unsigned long int)(SD_BLOCKSIZE - CurOffset), (unsigned char *)Buf);SD_WriteFinished();CurFileSec+;CurFileEndSec = CurFileS

11、ec;i = SD_BLOCKSIZE - CurOffset;CurOffset = Len - i;i = 1;SD_WriteNewBlock(CurFileSec);SD_WritingBlockData(unsigned long int)CurOffset , (unsigned char *)&Bufi);elseSD_WritingBlockData(unsigned long int)Len, (unsigned char *)Buf);CurOffset += Len;void FS_ReadingFile(unsigned int *Buf, unsigned int Len)unsigned int i;Len = (SD_BLOCKSIZE - CurOffset)SD_ReadingBlockData(unsigned long int)(SD_BLOCKSIZE - CurOffset), (unsigned char *)Buf);SD_ReadFinished();if(CurFileSec = 1;SD_ReadNewBlock(CurFileSec);