iis-s3c44b0.c

在移植成功ucos核的基础上扩充了该操作系统的许多没有功能。如文件系统

#include "../ucos-ii/includes.h"
#include "../startup/44b.h"
#include "../inc/drv/IIS-S3C44B0.h"
#include "../ucos-ii/Uhal/isr.h"
#include "..\inc\drv\OSFile.h"


///////////////////////////////////S3C44B0 IIS////////////////////////////////////////
#define IISCON_RIGHT_INDEX		0x100		//Right Channel
#define IISCON_TXFIFO_NE		0x80		//Transmit FIFO not empty flag
#define IISCON_RXFIFO_NE		0x40		//Transmit FIFO not empty flag
#define IISCON_TXDMA			0x20		//Transmit DMA service request enable
#define IISCON_RXDMA			0x10		//Receive DMA service request enable
#define IISCON_TXIDLE			0x08		//Transmit channel idle
#define IISCON_RXIDLE			0x04		//Receive channel idle
#define IISCON_PRESCALE			0x02		//IIS prescaler enable
#define IISCON_ENABLE			0x01		//IIS interface enable(start)

#define IISMOD_SLAVE			0x100		//slave mode select
#define IISMOD_TX				0x80		//Transmit mode
#define IISMOD_RX				0x40		//receive mode
#define IISMOD_RACTIVE			0x20		//Active level of right
#define IISMOD_MSBJ				0x10		//MSB-justified Serial interface format
#define IISMOD_16BIT			0x08		//Serial data 16bit per channel
#define IISMOD_MCLK_384FS		0x04		//Master clock frequency
#define IISMOD_32FS				0x01		//Serial bit clock frequency=32fs
#define IISMOD_48FS				0x02		//Serial bit clock frequency=48fs

#define IISFCON_TXDMA			0x800		//Transmit FIFO access DMA mode
#define IISFCON_RXDMA			0x400		//Receive FIFO access DMA mode
#define IISFCON_TXFIFO			0x200		//Transmit FIFO enable
#define IISFCON_RXFIFO			0x100		//Receive FIFO enable

/************************************************************
	S3C44B0 IIS初始化函数，函数开启IIS，
	参数isChangePLL是否改变锁频换
			如果是，则设置MCLK时钟速度为67.5M
			否则，不变
************************************************************/
void Init_IIS(BOOL isChangePLL)
{
	if(isChangePLL){
		ChangePllValue(0x52, 2, 1);
		Delay(100);
	}

	rIISCON=0;	//disable;
	rIISMOD=IISMOD_TX|IISMOD_RX|IISMOD_16BIT|IISMOD_32FS|IISMOD_MCLK_384FS;	//IIS mode, active left
	rIISFCON=IISFCON_TXDMA|IISFCON_RXFIFO|IISFCON_TXFIFO;

	rIISPSR=0x11;	//CODECLK= 1/4 MCLK

	rIISCON=IISCON_PRESCALE|IISCON_ENABLE;
}

///////////////////////////UDA1341/////////////////////////////////////////////////
#define UDA1341_MODE			(1<<14)		//GPC14

#define UDAADDR					0x14		//UDA1341 address
#define UDA_DATA0				0x00		//UDA1341 data0
#define UDA_DATA1				0x01		//UDA1341 data1
#define UDA_STATUS				0x02		//UDA1341 status

#define UDASTATUS0_RST			0x40		//UDA1341 status reset
#define UDASTATUS0_SC512		0x00		//UDA1341 status SC
#define UDASTATUS0_SC384		0x10		//UDA1341 status SC
#define UDASTATUS0_SC256		0x20		//UDA1341 status SC
#define UDASTATUS0_IIS			0x00		//UDA1341 status IF2-0=0 IIS
#define UDASTATUS0_DC			0x01		//UDA1341 status DC-filtering
#define UDASTATUS1_OGS6		(0x80|0x40)	//UDA1341 status gain of DAC 6dB
#define UDASTATUS1_IGS6		(0x80|0x20)	//UDA1341 status gain of ADC 6dB
#define UDASTATUS1_PADINV		(0x80|0x10)	//UDA1341 status ADC inverting
#define UDASTATUS1_PDAINV		(0x80|0x08)	//UDA1341 status DAC inverting
#define UDASTATUS1_DBSPD		(0x80|0x04)	//UDA1341 status double speed
#define UDASTATUS1_ADCON		(0x80|0x02)	//UDA1341 status ADC on
#define UDASTATUS1_DACON		(0x80|0x01)	//UDA1341 status DAC on

#define UDADATA0_VOL			0x00		//UDA1341 data0 volume value 6bit

#define L3CLK			0x100		//GPC8
#define L3DATA			0x200		//GPC9

void UDA1341_Send(unsigned char data)
{
#if OS_CRITICAL_METHOD == 3
	OS_CPU_SR  cpu_sr;
#endif
	int i,j;

	OS_ENTER_CRITICAL();

	for(i=0;i<8;i++){
		if(data&0x1)
			rPDATC|=L3DATA;
		else
			rPDATC&=~L3DATA;

		rPDATC&=~L3CLK;

		data>>=1;
		for(j=0;j<20;j++);
		rPDATC|=L3CLK;
		for(j=0;j<20;j++);
	}

	OS_EXIT_CRITICAL();
}

void Init_UDA1341()
{
	rPDATC&=~UDA1341_MODE;
	UDA1341_Send(UDAADDR|UDA_STATUS);

	rPDATC|=UDA1341_MODE;
	UDA1341_Send(UDASTATUS0_RST);

	Delay(1);

	rPDATC&=~UDA1341_MODE;
	UDA1341_Send(UDAADDR|UDA_STATUS);

	rPDATC|=UDA1341_MODE;
	UDA1341_Send(UDASTATUS0_SC384|UDASTATUS0_DC);

	rPDATC&=~UDA1341_MODE;
	UDA1341_Send(UDAADDR|UDA_STATUS);
	rPDATC|=UDA1341_MODE;
	UDA1341_Send(UDASTATUS1_ADCON|UDASTATUS1_DACON);

	Delay(1);
}

/////////////////////////////////////Audio Function///////////////////////////////
static OS_EVENT* AudioDMA_Sem=NULL;	//系统DMA资源

////////////////////播放音频相关变量/////////////////////
#define NextSendBuffer()		do{if(nCurrentSendBuffer==0)\
									nCurrentSendBuffer=1;\
								else\
									nCurrentSendBuffer=0;\
								nCurrentSendpos=0;\
								}while(0);

#define NextPlayBuffer()		do{if(nCurrentPlayBuffer==0)\
									nCurrentPlayBuffer=1;\
								else\
									nCurrentPlayBuffer=0;\
								}while(0);

static unsigned int AudioOutBuffer[2][AUDIO_OUT_BUFFERSIZE];
static unsigned int AudioOutBuflength[2];	//缓冲区长度，如果为0，表示未就绪

static unsigned int nCurrentSendpos=0;
static unsigned int nCurrentSendBuffer=0;	//当前发送缓冲区
static unsigned int nCurrentPlayBuffer=0;	//当前播放缓冲区
static OS_EVENT* AudioPlayDone_Sem=NULL;
static BOOL isPlaying=FALSE;

////////////////////录音相关变量///////////////////////
#define NextGetBuffer()		do{if(nCurrentGetBuffer==0)\
									nCurrentGetBuffer=1;\
								else\
									nCurrentGetBuffer=0;\
								nCurrentGetpos=0;\
								}while(0);

#define NextRecBuffer()		do{if(nCurrentRecBuffer==0)\
									nCurrentRecBuffer=1;\
								else\
									nCurrentRecBuffer=0;\
								}while(0);

static unsigned int AudioInBuffer[2][AUDIO_IN_BUFFERSIZE];
static unsigned int AudioInBuflength[2];	//缓冲区长度，如果为0，表示未就绪

static unsigned int nCurrentGetpos=0;
static unsigned int nCurrentGetBuffer=0;	//当前取声音的缓冲区
static unsigned int nCurrentRecBuffer=0;	//当前的录音缓冲区
static OS_EVENT* AudioRecDone_Sem=NULL;
static BOOL isRecing=FALSE;	//是否在录音状态


/************************************************************
	音频缓冲区录音完毕中断函数
************************************************************/
void BufferRec_Done_ISR()
{
	NextGetBuffer();

	if(nCurrentRecBuffer!=nCurrentGetBuffer && AudioInBuflength[nCurrentRecBuffer]){
		//如果另一个缓冲区已经读取完毕，则继续录音
		/****** BDMA1 Initialize ******/
		//for Source
		rBDISRC0=(1<<30)|(3<<28)|((int)0x1d18010);	//M2IO,fix,IISFIF
		//for des
		rBDIDES0=(((unsigned int)2<<30))|(1<<28)|(int)(&(AudioInBuffer[nCurrentRecBuffer]));	//Half word,inc,Buf
		//iis,reserve,done_int,not auto-reload/start,DMA enable,COUNT
		rBDICNT0=(1<<30)+(1<<26)+(3<<22)+(0<<21)+(0<<20)+(AudioInBuflength[nCurrentRecBuffer]&(~0x3));
		rBDICNT0 |= (1<<20);//enable
		//Enable DMA
		rBDCON0 = 0x0<<2;
	}
	else{		//否则，停止播放
		isRecing=FALSE;
		rIISCON&=~IISCON_RXDMA;	//TxDMA stop
		rBDICNT0=0x0;   //BDMA stop

		OSSemPost(AudioDMA_Sem);
	}

	OSSemPost(AudioRecDone_Sem);
}

/************************************************************
	音频缓冲区播放/录音完毕中断函数
************************************************************/
void BufferPlay_Done_ISR()
{

	if(isPlaying){
		AudioOutBuflength[nCurrentPlayBuffer]=0;
		NextPlayBuffer();
		if(nCurrentPlayBuffer!=nCurrentSendBuffer && AudioOutBuflength[nCurrentPlayBuffer]){
			//如果另一个缓冲区就绪，则继续播放
			/****** BDMA0 ReInitialize ******/
			//for Source	//Half word,inc,Buf
			rBDISRC0=(1<<30)|(1<<28)|((int)(&(AudioOutBuffer[nCurrentPlayBuffer])));
			//for des
			rBDIDES0=(1<<30)|(3<<28)|((int)0x1d18010);	//M2IO,fix,IISFIF
			//Size
			//iis,reserve,done_int,not auto-reload/start,DMA enable,COUNT
			rBDICNT0=(1<<30)|(1<<26)|(3<<22)|(0<<21)|(0<<20)|
						(AudioOutBuflength[nCurrentPlayBuffer]&(~0x3));
			rBDICNT0 |= (1<<20);//enable
			//Enable DMA
			rBDCON0 = 0x0<<2;
		}
		else{		//否则，停止播放
			isPlaying=FALSE;
			rIISCON&=~IISCON_TXDMA;	//TxDMA stop
			rBDICNT0=0x0;   //BDMA stop
			OSSemPost(AudioDMA_Sem);
		}
		OSSemPost(AudioPlayDone_Sem);
	}
	else if(isRecing)
		BufferRec_Done_ISR();
}

/************************************************************
	音频初始化函数
	参数isChangePLL是否改变锁频换
			如果是，则设置MCLK时钟速度为67.5M
			否则，不变
************************************************************/
void  Init_Audio(BOOL isChangePLL)
{
#if OS_CRITICAL_METHOD == 3
	OS_CPU_SR  cpu_sr;
#endif
	INT8U err;