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C5509A通过DMA乒乓缓冲方式从MCBSP接收和发送数据,进不去中断,完整程序附下,求大神指导 QQ251530442

/*********************************************************************
** Module Name: CODEC **
** Author: CTH **
** Version: 1.0 **
** CreateDate: 2008-8-10 **
** Description: **
** Remark: **
** Revision History: 2008-8-10 **
** Web: http://www.study-kit.com **
**********************************************************************/

/*********************************************************************/
/* DESCRIPTION: *//* */
/* this example is that the codec is controled by the I2C and Mcbsp */
/*********************************************************************/

#include <csl.h>
#include <csl_i2c.h>
#include <stdio.h>
#include <csl_pll.h>
#include <csl_mcbsp.h>
#include <dsplib.h>
#include <math.h>
#include <tms320.h>
#include <csl_irq.h>
#include <csl_dma.h>

#define CODEC_ADDR 0x1A

#define N 128
#define State_Signal_Process 1

/* Define a DMA_Handle object to be used with DMA_open function */
DMA_Handle hDmaRcv, hDmaXmt;

#pragma DATA_SECTION(Leftchannel_Buffer,"dmaMem")
static int Leftchannel_Buffer[N];
#pragma DATA_SECTION(Rightchannel_Buffer,"dmaMem")
static int Rightchannel_Buffer[N];

//static int Leftchannel_Buffer[N];
//static int Rightchannel_Buffer[N];

#pragma DATA_SECTION(pingrcv,"dmaMem")
static int pingrcv[N];
#pragma DATA_SECTION(pingxmt,"dmaMem")
static int pingxmt[N];
#pragma DATA_SECTION(pongrcv,"dmaMem")
static int pongrcv[N];
#pragma DATA_SECTION(pongxmt,"dmaMem")
static int pongxmt[N];

//static int pingrcv[N];
//static int pingxmt[N];
//static int pongrcv[N];
//static int pongxmt[N];

static int rpingbuf;
static int rpongbuf;
static int xpingbuf;
static int xpongbuf;

static int rfreebuf;
static int xfreebuf;

Uint16 State_Work=0;
Uint16 rcvEventId;
Uint16 xmtEventId;

/*锁相环的设置*/
PLL_Config myConfig = {
0, //IAI: the PLL locks using the same process that was underway //before the idle mode was entered
1, //IOB: If the PLL indicates a break in the phase lock, //it switches to its bypass mode and restarts the PLL phase-locking //sequence
12, //PLL multiply value; multiply 24 times
1 //Divide by 2 PLL divide value; it can be either PLL divide value //(when PLL is enabled), or Bypass-mode divide value
//(PLL in bypass mode, if PLL multiply value is set to 1)
};

MCBSP_Config Mcbsptest;

/*McBSP set,we use mcbsp1 to send and recieve the data between DSP and AIC23*/
MCBSP_Config Mcbsp1Config= {

MCBSP_SPCR1_RMK(

MCBSP_SPCR1_DLB_OFF, /* DLB = 0,禁止自闭环方式 */

MCBSP_SPCR1_RJUST_LZF, /* RJUST = 2 left justify the data and zero fill LSBS */

MCBSP_SPCR1_CLKSTP_DISABLE, /* CLKSTP = 0 Clock stop mode disable */

MCBSP_SPCR1_DXENA_ON, /* DXENA = 1 DX delay enabler on */

MCBSP_SPCR1_ABIS_DISABLE, /* ABIS = 0 reserved always write 0*/

MCBSP_SPCR1_RINTM_RRDY, /* RINTM = 0 sends a receive INT request to CPU when the RRDY bit

change from 0 to 1, indicating that receive data is ready to be read*/

0, /* RSYNCER = 0 receive frame-sync error bit, no error*/

MCBSP_SPCR1_RRST_DISABLE /* RRST = 0 reset the receiver*/

),

MCBSP_SPCR2_RMK(

MCBSP_SPCR2_FREE_NO, /* FREE = 0 free run bit, The McBSP transmit and receive clocks are affected as determined by the SOFT bit*/

MCBSP_SPCR2_SOFT_NO, /* SOFT = 0 Soft stop bit, Hard stop*/

MCBSP_SPCR2_FRST_FSG, /* FRST = 0 Frame-sync logic reset bit*/

MCBSP_SPCR2_GRST_CLKG, /* GRST = 0 Sample rate generator reset bit */

MCBSP_SPCR2_XINTM_XRDY, /* XINTM = 0 transmit interrupt mode bits XRDY bit changes from 0 to1 */

0, /* XSYNCERR = N/A transmit frame-sync error bit, no error*/

MCBSP_SPCR2_XRST_DISABLE /* XRST = 0 transmit ready bit, not ready*/

//注意:开始一定要设置为disable,否则不能设置它的寄存器,全部为默认值,导致不能正常接收,

//在程序调用C库函数mcbspstart时会在设为1,McBSP便退出reset状态开始工作

),

/*单数据相,接受数据长度为16位,每相2个数据*/

MCBSP_RCR1_RMK(

MCBSP_RCR1_RFRLEN1_OF(1), /* RFRLEN1 = 1 Receive frame length 1 bits(1 to 128 words),Frame length=(RFRLEN1+1)words*/

MCBSP_RCR1_RWDLEN1_16BIT /* RWDLEN1 = 2 Receive word length 1 bits, 16bit*/

),

MCBSP_RCR2_RMK(

MCBSP_RCR2_RPHASE_SINGLE, /* RPHASE = 0 Receive phase number bit, single-phase frame*/

MCBSP_RCR2_RFRLEN2_OF(0), /* RFRLEN2 = 0 */

MCBSP_RCR2_RWDLEN2_8BIT, /* RWDLEN2 = 0 */

MCBSP_RCR2_RCOMPAND_MSB, /* RCOMPAND = 0 receive companding mode bits, 0, no companding,MSB received first*/

MCBSP_RCR2_RFIG_YES, /* RFIG = 0 Receive frame-sync ignore bit, 1, frame-sync detect */

MCBSP_RCR2_RDATDLY_1BIT /* RDATDLY = 1 Receive data delay bits, 1-bit data delay*/

),

MCBSP_XCR1_RMK(

MCBSP_XCR1_XFRLEN1_OF(1), /* XFRLEN1 = 1 Transmit frame length 1(1 to 128 words),Frame length=(XFRLEN1+1)words */

MCBSP_XCR1_XWDLEN1_16BIT /* XWDLEN1 = 2 Transmit word length 1.16bit*/

),

MCBSP_XCR2_RMK(

MCBSP_XCR2_XPHASE_SINGLE, /* XPHASE = 0 Transmit phase number bit, single-phase frame*/

MCBSP_XCR2_XFRLEN2_OF(0), /* XFRLEN2 = 0 */

MCBSP_XCR2_XWDLEN2_8BIT, /* XWDLEN2 = 0 */

MCBSP_XCR2_XCOMPAND_MSB, /* XCOMPAND = 0 Transmit companding mode bits, 0, no companding,MSB received first*/

MCBSP_XCR2_XFIG_YES, /* XFIG = 0 Transmit frame-sync ignore bit, 1, frame-sync detect */

MCBSP_XCR2_XDATDLY_1BIT /* XDATDLY = 1 Transmit data delay bits, 1-bit data delay*/

),

MCBSP_SRGR1_DEFAULT, /*(0x0001u)FWID=0,CLKGDV=1 */

MCBSP_SRGR2_DEFAULT, /*(0x2000u)CLKSM=1,Sample rate generator input clock mode bit */

MCBSP_MCR1_DEFAULT,

MCBSP_MCR2_DEFAULT,

MCBSP_PCR_RMK(

MCBSP_PCR_IDLEEN_RESET, /* IDLEEN = 0 The McBSP remains active when the PERIPH domain is idled */

MCBSP_PCR_XIOEN_SP, /* XIOEN = 0 Transmit I/O enable bit, CLKX,FSX,DX,CLKS pins are serial port pins*/

MCBSP_PCR_RIOEN_SP, /* RIOEN = 0 Receive I/O enable bit, CLKR,FSR,DR,CLKS pins are serial port pins*/

MCBSP_PCR_FSXM_EXTERNAL, /* FSXM = 0 Transmit frame-sync mode bit,0:transmit fram-sync is supplied by an external source via the FSX pin*/

MCBSP_PCR_FSRM_EXTERNAL, /* FSRM = 0 Receive frame-sync mode bit,0:transmit fram-sync is supplied by an external source via the FSR pin*/

0, /* DXSTAT = N/A */

MCBSP_PCR_CLKXM_INPUT, /* CLKXM = 0 Transmit clock mode bit*/

MCBSP_PCR_CLKRM_INPUT, /* CLKRM = 0 Receive clock mode bit*/

MCBSP_PCR_SCLKME_NO, /* SCLKME = 0 Sample rate generator input clock mode bit,used with CLKSM to select the input clock*/

MCBSP_PCR_FSXP_ACTIVEHIGH, /* FSXP = 0 Transmit frame-sync polarity bit, 0,transmit frame-sync pulses are active high*/

MCBSP_PCR_FSRP_ACTIVEHIGH, /* FSRP = 1 Receive frame-sync polarity bit, 0,receive frame-sync pulses are active high*/

MCBSP_PCR_CLKXP_FALLING, /* CLKXP = 1 Transmit clock polarity bit,1,transmit data is driven on the rising edge of CLKX */

MCBSP_PCR_CLKRP_RISING /* CLKRP = 1 Receive clock polarity bit*/

),

MCBSP_RCERA_DEFAULT,

MCBSP_RCERB_DEFAULT,

MCBSP_RCERC_DEFAULT,

MCBSP_RCERD_DEFAULT,

MCBSP_RCERE_DEFAULT,

MCBSP_RCERF_DEFAULT,

MCBSP_RCERG_DEFAULT,

MCBSP_RCERH_DEFAULT,

MCBSP_XCERA_DEFAULT,

MCBSP_XCERB_DEFAULT,

MCBSP_XCERC_DEFAULT,

MCBSP_XCERD_DEFAULT,

MCBSP_XCERE_DEFAULT,

MCBSP_XCERF_DEFAULT,

MCBSP_XCERG_DEFAULT,

MCBSP_XCERH_DEFAULT

};
/* Create DMA Receive Side Configuration */

DMA_Config dmaRcvConfig = {

DMA_DMACSDP_RMK(

DMA_DMACSDP_DSTBEN_NOBURST, //Destination burst :-不使用突发

DMA_DMACSDP_DSTPACK_OFF, //Destination packing :-目标口禁止打包

DMA_DMACSDP_DST_DARAM, //Destination selection :-接收的目标口是DARAM

DMA_DMACSDP_SRCBEN_NOBURST, //Source burst :-源突发禁止

DMA_DMACSDP_SRCPACK_OFF, //Source packing :-源口禁止打包

DMA_DMACSDP_SRC_PERIPH, //Source selection :-外设mcbsp

DMA_DMACSDP_DATATYPE_16BIT //Data type :-设置数据类型16bit字长

), /* DMACSDP 源与目标参数寄存器 */

DMA_DMACCR_RMK(

DMA_DMACCR_DSTAMODE_POSTINC, //Destination address mode :-自动执行后增量(由于本程序中数据类型是16bit,所以+2)

DMA_DMACCR_SRCAMODE_CONST, //Source address mode :-源地址为恒定地址

DMA_DMACCR_ENDPROG_ON, //End of programmation bit :-

//DMA_DMACCR_REPEAT_ON, //Repeat condition :-不管编程配置结束位,结束传输自动初始化开始

DMA_DMACCR_REPEAT_OFF,

DMA_DMACCR_AUTOINIT_ON, //Auto initialization bit :-

DMA_DMACCR_EN_STOP, //Channel enable :-设置时先关闭通道

DMA_DMACCR_PRIO_LOW, //Channel priority :-设置为低优先级

DMA_DMACCR_FS_ELEMENT, //Frame/Element Sync :-单元事件同步

DMA_DMACCR_SYNC_REVT1 //Synchronization control :-McBSP1 Receive Event(REVT1)

), /* DMACCR 通道控制寄存器 */

DMA_DMACICR_RMK(

DMA_DMACICR_BLOCKIE_ON, //Whole block interrupt enable :-块传输完成后中断使能

DMA_DMACICR_LASTIE_OFF, //Last frame interrupt enable :-

DMA_DMACICR_FRAMEIE_OFF, //Whole frame interrupt enable :-

DMA_DMACICR_FIRSTHALFIE_OFF, //Half frame interrupt enable :-

DMA_DMACICR_DROPIE_OFF, //Sync. event drop interrupt enable :-

DMA_DMACICR_TIMEOUTIE_OFF //Time out interrupt enable :-

), /* DMACICR 中断控制寄存器 */

(DMA_AdrPtr)(MCBSP_ADDR(DRR11)), /* DMACSSAL 源地址低位 */

0, /* DMACSSAU 源地址高位*/

(DMA_AdrPtr)&pingrcv, /* DMACDSAL 目的地址低位*/

0, /* DMACDSAU 目的地址高位*/

2, /* DMACEN 1 帧内数据长度 16*2 两个数据一个帧*/

N/2, /* DMACFN 帧数大小 */

0, /* DMACFI */

0 /* DMACEI */

};

/* Create DMA Transmit Side Configuration */

DMA_Config dmaXmtConfig = {

DMA_DMACSDP_RMK(

DMA_DMACSDP_DSTBEN_NOBURST, //Destination burst :-不使用突发

DMA_DMACSDP_DSTPACK_OFF, //Destination packing :-目标口禁止打包

DMA_DMACSDP_DST_PERIPH, //Destination selection :-接收的目标口是外设mcbsp

DMA_DMACSDP_SRCBEN_NOBURST, //Source burst :-源突发禁止

DMA_DMACSDP_SRCPACK_OFF, //Source packing :-源口禁止打包

DMA_DMACSDP_SRC_DARAM, //Source selection :源口为DARAM

DMA_DMACSDP_DATATYPE_16BIT //Data type :-设置数据类型16bit字长

), /* DMACSDP 源与目标参数寄存器 */

DMA_DMACCR_RMK(

DMA_DMACCR_DSTAMODE_CONST, //Destination address mode :-目标口地址为恒定地址

DMA_DMACCR_SRCAMODE_POSTINC, //Source address mode :-自动执行后增量(由于本程序中数据类型是16bit,所以+2)

DMA_DMACCR_ENDPROG_ON, //End of programmation bit :-

//DMA_DMACCR_REPEAT_ON, //Repeat condition :-不管编程配置结束位,结束传输自动初始化开始

DMA_DMACCR_REPEAT_OFF,

DMA_DMACCR_AUTOINIT_ON, //Auto initialization bit :-

DMA_DMACCR_EN_STOP, //Channel enable :-设置时先关闭通道

DMA_DMACCR_PRIO_LOW, //Channel priority :-设置为低优先级

DMA_DMACCR_FS_ELEMENT, //Frame/Element Sync :-单元事件同步

DMA_DMACCR_SYNC_XEVT1 //Synchronization control :-McBSP1 Transmit Event(XEVT1)

), /* DMACCR 通道控制寄存器 */

DMA_DMACICR_RMK(

DMA_DMACICR_BLOCKIE_ON, //Whole block interrupt enable :-块传输完成后中断使能

DMA_DMACICR_LASTIE_OFF, //Last frame interrupt enable :-

DMA_DMACICR_FRAMEIE_OFF, //Whole frame interrupt enable :-

DMA_DMACICR_FIRSTHALFIE_OFF, //Half frame interrupt enable :-

DMA_DMACICR_DROPIE_OFF, //Sync. event drop interrupt enable :-

DMA_DMACICR_TIMEOUTIE_OFF //Time out interrupt enable :-

), /* DMACICR 中断控制寄存器 */

(DMA_AdrPtr)&pingxmt[0], /* DMACSSAL 源地址低位*/

0, /* DMACSSAU 源地址高位 */

(DMA_AdrPtr)(MCBSP_ADDR(DXR11)), /* DMACDSAL 目的地址低位*/

0, /* DMACDSAU 目的地址高位*/

2, /* DMACEN 1 帧内数据长度 16*2 两个数据一个帧*/

N/2, /* DMACFN 帧数大小 */

0, /* DMACFI */

0 /* DMACEI */

};

/* This next struct shows how to use the I2C API */
/* Create and initialize an I2C initialization structure */
I2C_Setup I2Cinit = {
0, /* 7 bit address mode */
0, /* own address – don't care if master */
84, /* clkout value (Mhz) */
50, /* a number between 10 and 400*/
0, /* number of bits/byte to be received or transmitted (8)*/
0, /* DLB mode on*/
1 /* FREE mode of operation on*/
};

I2C_Config testI2C;

/*数字音频接口格式设置
AIC23为主模式,数据为DSP模式,数据长度16位*/Uint16 digital_audio_inteface_format[2]={0x0e,0x53};
/*AIC23的波特率设置,采样率为44.1K*/
Uint16 sample_rate_control[2] = {0x10,0x23};
//Uint16 sample_rate_control[2] = {0x10,0x0d};
/*AIC23寄存器复位*/
Uint16 reset[2] ={0x1e,0x00};
/*AIC23节电方式设置,所有部分均所与工作状态*/
//Uint16 power_down_control[2] ={0x0c,0x03};
Uint16 power_down_control[2] ={0x0c,0x02};
//Uint16 power_down_control[2] ={0x0c,0x01};
/*AIC23模拟音频的控制
DAC使能,ADC输入选择为Line*/
//Uint16 analog_aduio_path_control[2] ={0x08,0x10};
Uint16 analog_aduio_path_control[2] ={0x08,0x10};
/*AIC23数字音频通路的控制*/
Uint16 digital_audio_path_control[2] ={0x0a,0x05};
/*AIC23数字接口的使能*/
Uint16 digital_interface_activation[2] ={0x12,0x01};
/*AIC23左通路音频调节*/
Uint16 left_line_input_volume_control[2] ={0x00,0x17};
/*AIC23右通路音频调节*/
Uint16 right_line_input_volume_control[2] ={0x02,0x17};
/*AIC23耳机左通路音频调节*/
Uint16 left_headphone_volume_control[2] ={0x04,0xFF};
/*AIC23耳机右通路音频调节*/
Uint16 right_headphone_volume_control[2] = {0x06,0xFF};
/*定义McBSP的句柄*/
MCBSP_Handle hMcbsp;

Uint16 i2c_status;

Uint32 tDelay;

void delay(Uint32 k)
{
while(k–);
}

extern void VECSTART(void);
interrupt void dmaXmtIsr(void);
interrupt void dmaRcvIsr(void);
void AIC23_DataTransfer_Init(void);
void AIC23_I2C_Init(void);
void Signal_Process(void);

void main(void)
{

/* Initialize CSL library – This is REQUIRED !!! */

/*初始化CSL库*/
CSL_init();
/*设置系统的运行速度为140MHz*/
PLL_config(&myConfig);

AIC23_I2C_Init();

AIC23_DataTransfer_Init();

while(TRUE)
{
if(State_Work == 1)
{
Signal_Process();

}

}

}

interrupt void dmaXmtIsr(void) {

static int * ptr;

unsigned int ptraddrhi, ptraddrlow;

DMA_FSETH(hDmaXmt,DMACSR,BLOCK,0);

if(xfreebuf == xpingbuf)

{

xfreebuf = xpongbuf;

ptr = pongxmt;

}

else

{

xfreebuf = xpingbuf;

ptr = pingxmt;

}

while(DMA_FGETH(hDmaXmt, DMACCR, ENDPROG));

//修改DMA地址

ptraddrhi = (unsigned int)(((unsigned long)(ptr)) >> 15) & 0xFFFFu;

//因为DMA都使用字节地址,所以必须左移一位

ptraddrlow= (unsigned int)(((unsigned long)(ptr)) << 1) & 0xFFFFu;

DMA_RSETH(hDmaXmt, DMACSSAU, ptraddrhi);
DMA_RSETH(hDmaXmt, DMACSSAL, ptraddrlow);

DMA_FSETH(hDmaXmt, DMACCR, ENDPROG,1);

}

interrupt void dmaRcvIsr(void) {

static int * ptr;

unsigned int ptraddrhi, ptraddrlow;

DMA_FSETH(hDmaRcv,DMACSR,BLOCK,0);

if(rfreebuf == rpingbuf)

{

rfreebuf = rpongbuf;

ptr = pongrcv;

}

else

{

rfreebuf = rpingbuf;

ptr = pingrcv;

}

while(DMA_FGETH(hDmaRcv, DMACCR, ENDPROG));

//修改DMA地址

ptraddrhi = (unsigned int)(((unsigned long)(ptr)) >> 15) & 0xFFFFu;

//因为DMA都使用字节地址,所以必须左移一位

ptraddrlow= (unsigned int)(((unsigned long)(ptr)) << 1) & 0xFFFFu;

DMA_RSETH(hDmaRcv, DMACSSAU, ptraddrhi);
DMA_RSETH(hDmaRcv, DMACSSAL, ptraddrlow);

DMA_FSETH(hDmaRcv, DMACCR, ENDPROG,1);

State_Work = State_Signal_Process;

}

void AIC23_DataTransfer_Init()

{

Uint16 i;

Uint16 srcAddrHi, srcAddrLo;

Uint16 dstAddrHi, dstAddrLo;

for(i=0;i<N;i++)

{

pingrcv[i] = 0;

pongrcv[i] = 0;

pingxmt[i] = 0;

pongxmt[i] = 0;

}

/* By default, the TMS320C55xx compiler assigns all data symbols word */

/* addresses. The DMA however, expects all addresses to be byte */

/* addresses. Therefore, we must shift the address by 2 in order to */

/* change the word address to a byte address for the DMA transfer. */

srcAddrHi = (Uint16)(((Uint32)(MCBSP_ADDR(DRR11))) >> 15) & 0xFFFFu;

srcAddrLo = (Uint16)(((Uint32)(MCBSP_ADDR(DRR11))) << 1) & 0xFFFFu;

dstAddrHi = (Uint16)(((Uint32)(&pingrcv)) >> 15) & 0xFFFFu;

dstAddrLo = (Uint16)(((Uint32)(&pingrcv)) << 1) & 0xFFFFu;

dmaRcvConfig.dmacssal = (DMA_AdrPtr)srcAddrLo;

dmaRcvConfig.dmacssau = srcAddrHi;

dmaRcvConfig.dmacdsal = (DMA_AdrPtr)dstAddrLo;

dmaRcvConfig.dmacdsau = dstAddrHi;

srcAddrHi = (Uint16)(((Uint32)(&pingxmt[0])) >> 15) & 0xFFFFu;

srcAddrLo = (Uint16)(((Uint32)(&pingxmt[0])) << 1) & 0xFFFFu;

dstAddrHi = (Uint16)(((Uint32)(MCBSP_ADDR(DXR11))) >> 15) & 0xFFFFu;

dstAddrLo = (Uint16)(((Uint32)(MCBSP_ADDR(DXR11))) << 1) & 0xFFFFu;

dmaXmtConfig.dmacssal = (DMA_AdrPtr)srcAddrLo;

dmaXmtConfig.dmacssau = srcAddrHi;

dmaXmtConfig.dmacdsal = (DMA_AdrPtr)dstAddrLo;

dmaXmtConfig.dmacdsau = dstAddrHi;

/* Open MCBSP Port 1 and set registers to their power on defaults */

hMcbsp = MCBSP_open(MCBSP_PORT1, MCBSP_OPEN_RESET);

/* Open DMA channels 4 & 5 and set regs to power on defaults */

hDmaRcv = DMA_open(DMA_CHA4,DMA_OPEN_RESET);

hDmaXmt = DMA_open(DMA_CHA5,DMA_OPEN_RESET);

/* Get interrupt event associated with DMA receive and transmit */

xmtEventId = DMA_getEventId(hDmaXmt);

rcvEventId = DMA_getEventId(hDmaRcv);

/* Temporarily disable interrupts and clear any pending */

/* interrupts for MCBSP transmit */

// old_intm = IRQ_globalDisable();

/* Clear any pending interrupts for DMA channels */

IRQ_clear(xmtEventId);

IRQ_clear(rcvEventId);

/* Enable DMA interrupt in IER register */

IRQ_enable(xmtEventId);

IRQ_enable(rcvEventId);

/* Set Start Of Interrupt Vector Table */

// IRQ_setVecs(0x10000);

/* Place DMA interrupt service addresses at associate vector */

IRQ_plug(xmtEventId,&dmaXmtIsr);

IRQ_plug(rcvEventId,&dmaRcvIsr);

/* Write values from configuration structure to MCBSP control regs */

MCBSP_config(hMcbsp, &Mcbsp1Config);

/* Write values from configuration structure to DMA control regs */

DMA_config(hDmaRcv,&dmaRcvConfig);

DMA_config(hDmaXmt,&dmaXmtConfig);

xfreebuf = xpongbuf;

rfreebuf = rpongbuf;

/* Enable all maskable interrupts */

IRQ_globalEnable();

/* Start Sample Rate Generator and Enable Frame Sync */

MCBSP_start(hMcbsp,

MCBSP_SRGR_START | MCBSP_SRGR_FRAMESYNC,

0x300u);

/* Enable DMA */

DMA_start(hDmaRcv);

DMA_start(hDmaXmt);

/* Take MCBSP transmit and receive out of reset */

MCBSP_start(hMcbsp,

MCBSP_XMIT_START | MCBSP_RCV_START,

0u);

while(DMA_FGETH(hDmaRcv, DMACCR, ENDPROG));

dstAddrHi = (Uint16)(((Uint32)(&pongrcv)) >> 15) & 0xFFFFu;

dstAddrLo = (Uint16)(((Uint32)(&pongrcv)) << 1) & 0xFFFFu;

dmaRcvConfig.dmacdsal = (DMA_AdrPtr)dstAddrLo;

dmaRcvConfig.dmacdsau = dstAddrHi;

srcAddrHi = (Uint16)(((Uint32)(&pongxmt[0])) >> 15) & 0xFFFFu;

srcAddrLo = (Uint16)(((Uint32)(&pongxmt[0])) << 1) & 0xFFFFu;

dmaXmtConfig.dmacssal = (DMA_AdrPtr)srcAddrLo;

dmaXmtConfig.dmacssau = srcAddrHi;

DMA_FSETH(hDmaRcv, DMACCR, ENDPROG,1);

DMA_FSETH(hDmaXmt, DMACCR, ENDPROG,1);

}

void AIC23_I2C_Init(void)
{
i2c_status=1;
/* Initialize I2C, using parameters in init structure */
/*初始化I2C的格式*/

// I2C_config(&Config);
// I2C_start();

// I2C_getConfig(&Config1);
/*I2C is undet reset*/
I2C_RSET(I2CMDR,0);
/*设置预分频寄存器,I2C的mode clock is 10MHz*/
delay(100);
I2C_RSET(I2CSAR,0x001A);
I2C_RSET(I2CMDR,0x0620);

I2C_setup(&I2Cinit);
/*设置I2C的Mater clock*/
I2C_RSET(I2CCLKL,100);
I2C_RSET(I2CCLKH,100);

I2C_getConfig(&testI2C);

/*reset AIC23*/
i2c_status = I2C_write( reset, //pointer to data array
2, //length of data to be transmitted
1, //master or slaver
CODEC_ADDR, //slave address to transmit to
1, //transfer mode of operation
30000 //time out for bus busy
);
delay(1000);
/*设置AIC23各部分均工作*/
i2c_status = I2C_write( power_down_control,//pointer to data array
2, //length of data to be transmitted
1, //master or slaver
CODEC_ADDR, //slave address to transmit to
1, //transfer mode of operation
30000 //time out for bus busy
);
/*设置AIC23的数字接口*/
i2c_status = I2C_write( digital_audio_inteface_format,//pointer to data array
2, //length of data to be transmitted
1, //master or slaver
CODEC_ADDR, //slave address to transmit to
1, //transfer mode of operation
30000 //time out for bus busy
);
/*设置AIC23模拟通路*/
i2c_status = I2C_write( analog_aduio_path_control,//pointer to data array
2, //length of data to be transmitted
1, //master or slaver
CODEC_ADDR, //slave address to transmit to
1, //transfer mode of operation
30000 //time out for bus busy
);
/*设置数字通路*/
i2c_status = I2C_write( digital_audio_path_control,//pointer to data array
2, //length of data to be transmitted
1, //master or slaver
CODEC_ADDR, //slave address to transmit to
1, //transfer mode of operation
30000 //time out for bus busy
);
/*设置AIC23的采样率*/
i2c_status = I2C_write( sample_rate_control,//pointer to data array
2, //length of data to be transmitted
1, //master or slaver
CODEC_ADDR, //slave address to transmit to
1, //transfer mode of operation
30000 //time out for bus busy
);
/*设置耳机音量*/
i2c_status = I2C_write( left_headphone_volume_control,//pointer to data array
2, //length of data to be transmitted
1, //master or slaver
CODEC_ADDR, //slave address to transmit to
1, //transfer mode of operation
30000 //time out for bus busy
);
i2c_status = I2C_write( right_headphone_volume_control,//pointer to data array
2, //length of data to be transmitted
1, //master or slaver
CODEC_ADDR, //slave address to transmit to
1, //transfer mode of operation
30000 //time out for bus busy
);
/*设置Line输入的音量*/
i2c_status = I2C_write( left_line_input_volume_control,//pointer to data array
2, //length of data to be transmitted
1, //master or slaver
CODEC_ADDR, //slave address to transmit to
1, //transfer mode of operation
30000 //time out for bus busy
);
i2c_status = I2C_write( right_line_input_volume_control,//pointer to data array
2, //length of data to be transmitted
1, //master or slaver
CODEC_ADDR, //slave address to transmit to
1, //transfer mode of operation
30000 //time out for bus busy
);

/*启动AIC23*/
i2c_status = I2C_write( digital_interface_activation,//pointer to data array
2, //length of data to be transmitted
1, //master or slaver
CODEC_ADDR, //slave address to transmit to
1, //transfer mode of operation
30000 //time out for bus busy
);

}
void Signal_Process()

{

Uint16 i,j=0;

if(rfreebuf == rpongbuf)//(PingPong == PING)

{

for(i=0;i<N;i=i+2)

{

Leftchannel_Buffer[j] = pongrcv[i];

Rightchannel_Buffer[j] = pongrcv[i+1];

j++;

}

}

else

{

for(i=0;i<N;i=i+2)

{

Leftchannel_Buffer[j] = pingrcv[i];

Rightchannel_Buffer[j] = pingrcv[i+1];

j++;

}

}

j = 0;

if(xfreebuf == xpongbuf)

{

for(i=0;i<N;i=i+2)

{

pongxmt[i] = Leftchannel_Buffer[j];

pongxmt[i+1] = Rightchannel_Buffer[j];

j++;

}

}

else

{

for(i=0;i<N;i=i+2)

{

pingxmt[i] = Leftchannel_Buffer[j];

pingxmt[i+1] = Rightchannel_Buffer[j];

j++;

}

}

}

user5321810:

请问一下这个信号处理函数时做什么用的?

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未经允许不得转载:TI中文支持网 » C5509A通过DMA乒乓缓冲方式从MCBSP接收和发送数据,进不去中断,完整程序附下,求大神指导 QQ251530442
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