TI中文支持网运用5509a，通过配置DMA来实现中断处理，在中段处理函数中实现声音的处理和播放，但是不知道为何播放后的声音是不对的，单步调试的时候会出现声音处理迭代系数只有0和-1两种数字，希望能够得到各位的指教。
/* Define transmit and receive buffers */
#pragma DATA_SECTION(xmt,"dmaMem")
Uint16 xmt[N];
#pragma DATA_SECTION(rcv,"dmaMem")
Uint16 rcv[N];
/*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
24, //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设置************************************************/
MCBSP_Config ConfigLoopBack16= {
MCBSP_SPCR1_RMK(
MCBSP_SPCR1_DLB_OFF, /* DLB = 0,禁止自闭环方式 */
MCBSP_SPCR1_RJUST_LZF, /* RJUST = 2 */
MCBSP_SPCR1_CLKSTP_DISABLE, /* CLKSTP = 0 */
MCBSP_SPCR1_DXENA_ON, /* DXENA = 1 */
0, /* ABIS = 0 */
MCBSP_SPCR1_RINTM_RRDY, /* RINTM = 0 */
0, /* RSYNCER = 0 */
MCBSP_SPCR1_RRST_DISABLE /* RRST = 0 */
),
MCBSP_SPCR2_RMK(
MCBSP_SPCR2_FREE_NO, /* FREE = 0 */
MCBSP_SPCR2_SOFT_NO, /* SOFT = 0 */
MCBSP_SPCR2_FRST_FSG, /* FRST = 0 */
MCBSP_SPCR2_GRST_CLKG, /* GRST = 0 */
MCBSP_SPCR2_XINTM_XRDY, /* XINTM = 0 */
0, /* XSYNCER = N/A */
MCBSP_SPCR2_XRST_DISABLE /* XRST = 0 */
),
/*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 */
MCBSP_RCR1_RWDLEN1_16BIT /* RWDLEN1 = 2 */
),
MCBSP_RCR2_RMK(
MCBSP_RCR2_RPHASE_SINGLE, /* RPHASE = 0 */
MCBSP_RCR2_RFRLEN2_OF(0), /* RFRLEN2 = 0 */
MCBSP_RCR2_RWDLEN2_8BIT, /* RWDLEN2 = 0 */
MCBSP_RCR2_RCOMPAND_MSB, /* RCOMPAND = 0 */
MCBSP_RCR2_RFIG_YES, /* RFIG = 0 */
MCBSP_RCR2_RDATDLY_1BIT /* RDATDLY = 1 */
),
MCBSP_XCR1_RMK(
MCBSP_XCR1_XFRLEN1_OF(1), /* XFRLEN1 = 1 */
MCBSP_XCR1_XWDLEN1_16BIT /* XWDLEN1 = 2 */
),
MCBSP_XCR2_RMK(
MCBSP_XCR2_XPHASE_SINGLE, /* XPHASE = 0 */
MCBSP_XCR2_XFRLEN2_OF(0), /* XFRLEN2 = 0 */
MCBSP_XCR2_XWDLEN2_8BIT, /* XWDLEN2 = 0 */
MCBSP_XCR2_XCOMPAND_MSB, /* XCOMPAND = 0 */
MCBSP_XCR2_XFIG_YES, /* XFIG = 0 */
MCBSP_XCR2_XDATDLY_1BIT /* XDATDLY = 1 */
),
MCBSP_SRGR1_DEFAULT,
MCBSP_SRGR2_DEFAULT,
MCBSP_MCR1_DEFAULT,
MCBSP_MCR2_DEFAULT,
MCBSP_PCR_RMK(
MCBSP_PCR_IDLEEN_RESET, /* IDLEEN = 0 */
MCBSP_PCR_XIOEN_SP, /* XIOEN = 0 */
MCBSP_PCR_RIOEN_SP, /* RIOEN = 0 */
MCBSP_PCR_FSXM_EXTERNAL, /* FSXM = 0 */
MCBSP_PCR_FSRM_EXTERNAL, /* FSRM = 0 */
0, /* DXSTAT = N/A */
MCBSP_PCR_CLKXM_INPUT, /* CLKXM = 0 */
MCBSP_PCR_CLKRM_INPUT, /* CLKRM = 0 */
MCBSP_PCR_SCLKME_NO, /* SCLKME = 0 */
MCBSP_PCR_FSXP_ACTIVEHIGH, /* FSXP = 0 */
MCBSP_PCR_FSRP_ACTIVEHIGH, /* FSRP = 1 */
MCBSP_PCR_CLKXP_FALLING, /* CLKXP = 1 */
MCBSP_PCR_CLKRP_RISING /* CLKRP = 1 */
),
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
};
/*******************************************************************************************/
/************************************DMA设置************************************************/
/* 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_AUTOINIT_OFF,
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_FS_DISABLE,
DMA_DMACCR_SYNC_REVT0 //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_BLOCKIE_OFF,
DMA_DMACICR_LASTIE_OFF, //Last frame interrupt enable :-
DMA_DMACICR_FRAMEIE_OFF, //Whole frame interrupt enable :-
//DMA_DMACICR_FRAMEIE_ON,
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(DRR10)), /* DMACSSAL 源地址低位 */
0, /* DMACSSAU 源地址高位*/
(DMA_AdrPtr)&rcv, /* 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_AUTOINIT_OFF,
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_FS_DISABLE,
DMA_DMACCR_SYNC_XEVT0 //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_BLOCKIE_OFF,
DMA_DMACICR_LASTIE_OFF, //Last frame interrupt enable :-
DMA_DMACICR_FRAMEIE_OFF, //Whole frame interrupt enable :-
//DMA_DMACICR_FRAMEIE_ON,
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)&xmt[0], /* DMACSSAL 源地址低位*/
0, /* DMACSSAU 源地址高位 */
(DMA_AdrPtr)(MCBSP_ADDR(DXR10)), /* 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 */
};
/* Define a DMA_Handle object to be used with DMA_open function */
DMA_Handle hDmaRcv, hDmaXmt;
/* Define a MCBSP_Handle object to be used with MCBSP_open function */
MCBSP_Handle hMcbsp;
volatile Uint16 transferComplete = FALSE;
Uint16 err = 0;
Uint16 old_intm;
Uint16 xmtEventId, rcvEventId;
//———Function prototypes———
/* Reference start of interrupt vector table */
/* This symbol is defined in file, vectors.s55 */
extern void VECSTART(void);
/* Protoype for interrupt functions */
interrupt void dmaXmtIsr(void);
interrupt void dmaRcvIsr(void);
void taskFxn(void);
/*******************************************************************************************/
/***********************************I2C的设置和AIC的设置************************************/
/* 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 */
144, /* 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*/
};
/*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};
/*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,0x00};
/*AIC23模拟音频的控制
DAC使能，ADC输入选择为mic*/
Uint16 analog_aduio_path_control[2] ={0x08,0x10};
//Uint16 analog_aduio_path_control[2] ={0x08,0x15};//MIC IN 有增益
//Uint16 analog_aduio_path_control[2] ={0x08,0x14};//MIC IN 无增益
//Uint16 analog_aduio_path_control[2] ={0x08,0x10};//Line IN
/*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] ={0x05,0xFF};
/*AIC23耳机右通路音频调节*/
Uint16 right_headphone_volume_control[2] = {0x07,0xFF};
/*******************************************************************************************/
/*******************************************************************************************/
void delay(Uint32 k)
{
while(k–);
}
/*******************************************************************************************/
/*******************************************************************************************/
void CODEC(void)
{
//printf ("%s\n","CODEC");
/*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);
/*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
);
}
int ShiftArray(int *Sx,int lastx)
{
int i;
for(i=n-1;i>0;i–)
{
Sx[i]=Sx[i-1];
}
Sx[0]=lastx;
return(0);
}
int dotProd(int *Firx,int *Firh)
{
int i;
int sum=0;
for(i=0;i<n;i++)
{
sum+=(Firx[i]*Firh[i]);
}
return(sum);
}
int fxlms(int *xx,int *XX,int ee)
{
int yy;
int i;
long temp;
ShiftArray(en,e);
e=dotProd(en,H3);
x=e-d;
ShiftArray(xn,x);
X=dotProd(xn,H3);
ShiftArray(Xn,X);
for(i=0;i<n;i++)
{
temp=(long)(XX[i]*ee*u);
wn[i]=wn[i]+(temp)>>(15);
}
for(i=0;i<n;i++)
{
yy+=xx[i]*wn[i];
}
return(yy);
}
//———main routine———
void main(void)
{
Uint16 i;
for(i=n-1;i>0;i–)
{
wn[i]=0;
xn[i]=0;
yn[i]=0;
en[i]=0;
}
/* Initialize CSL library – This is REQUIRED !!! */
CSL_init();
/* Set IVPD/IVPH to start of interrupt vector table */
IRQ_setVecs((Uint32)(&VECSTART));
PLL_config(&myConfig);
/* Call function to effect transfer */
CODEC();
taskFxn();
}
void taskFxn(void)
{
Uint16 srcAddrHi, srcAddrLo;
Uint16 dstAddrHi, dstAddrLo;
Uint16 i;
/* 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(DRR10))) >> 15) & 0xFFFFu;
srcAddrLo = (Uint16)(((Uint32)(MCBSP_ADDR(DRR10))) << 1) & 0xFFFFu;
dstAddrHi = (Uint16)(((Uint32)(&rcv)) >> 15) & 0xFFFFu;
dstAddrLo = (Uint16)(((Uint32)(&rcv)) << 1) & 0xFFFFu;
dmaRcvConfig.dmacssal = (DMA_AdrPtr)srcAddrLo;
dmaRcvConfig.dmacssau = srcAddrHi;
dmaRcvConfig.dmacdsal = (DMA_AdrPtr)dstAddrLo;
dmaRcvConfig.dmacdsau = dstAddrHi;
srcAddrHi = (Uint16)(((Uint32)(&xmt[0])) >> 15) & 0xFFFFu;
srcAddrLo = (Uint16)(((Uint32)(&xmt[0])) << 1) & 0xFFFFu;
dstAddrHi = (Uint16)(((Uint32)(MCBSP_ADDR(DXR10))) >> 15) & 0xFFFFu;
dstAddrLo = (Uint16)(((Uint32)(MCBSP_ADDR(DXR10))) << 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_PORT0, 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, &ConfigLoopBack16);
/* Write values from configuration structure to DMA control regs */
DMA_config(hDmaRcv,&dmaRcvConfig);
DMA_config(hDmaXmt,&dmaXmtConfig);
#if 0
/* Take MCBSP transmit and receive out of reset */
MCBSP_start(hMcbsp,
MCBSP_XMIT_START | MCBSP_RCV_START,
0u);
/* Prime MCBSP DXR */
while (!(MCBSP_xrdy(hMcbsp))){
;
}
MCBSP_write16(hMcbsp,xmt[0]);
/* Enable all maskable interrupts */
IRQ_globalEnable();
/* Enable DMA */
DMA_start(hDmaRcv);
DMA_start(hDmaXmt);
/* Start Sample Rate Generator and Enable Frame Sync */
MCBSP_start(hMcbsp,
MCBSP_SRGR_START | MCBSP_SRGR_FRAMESYNC,
0x300u);
printf ("%s\n""IF");
#else
/* 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);
printf ("%s\n","ELSE");
#endif
//while(DMA_FGETH(hDmaRcv, DMACCR, ENDPROG));
/* Wait for DMA transfer to be complete */
//DMA_FSETH(hDmaRcv, DMACCR, ENDPROG,1);
//DMA_FSETH(hDmaXmt, DMACCR, ENDPROG,1);
//printf ("%s\n","AGAIN");
//while(DMA_FGETH(hDmaRcv, DMACCR, ENDPROG));
//DMA_FSETH(hDmaRcv, DMACCR, ENDPROG,1);
//DMA_FSETH(hDmaXmt, DMACCR, ENDPROG,1);
//printf ("%s\n",err?"TEST FAILED" : "TEST PASSED");
/* Restore status of global interrupt enable flag */
//IRQ_globalRestore(old_intm);
/* We're done with MCBSP and DMA , so close them */
//MCBSP_close(hMcbsp);
//DMA_close(hDmaRcv);
//DMA_close(hDmaXmt);
}
interrupt void dmaXmtIsr(void) {
Uint16 i;
//DMA_stop(hDmaXmt);
//IRQ_disable(xmtEventId);
//printf ("%s\n","dmaXmtIsr");
//DMA_start(hDmaRcv);
//DMA_start(hDmaXmt);
TestflagT++;
}
interrupt void dmaRcvIsr(void) {
//DMA_stop(hDmaRcv);
//IRQ_disable(rcvEventId);
//printf ("%s\n","dmaRcvIsr");
// Uint16 i;
//DMA_start(hDmaRcv);
//DMA_start(hDmaXmt);
// for(i = 0; i <= N – 1; i++)
// {
// xmt[i]=rcv[i];
// }
//DMA_start(hDmaRcv);
int i;
for(i = 0; i < N; i++)
{
e=rcv[i];
y=fxlms(xn,Xn,e);
xmt[i]=y;
ShiftArray(yn,y);
d=dotProd(yn,H3)+e;
}
DMA_start(hDmaXmt);
TestflagR++;
}
Shine：
先看一下不用DMA方式，McBSP+AIC23能正确播放声音吗？
user5321810：
回复 Shine:
没加数据处理程序以及没配置DMA的时候，我利用code程序配置了MCBSP和AIC23进行过音频的接收和播放，是没有问题的。只是音量比较低而已。现在利用DMA配置中断加入处理程序，输出的声音并不是处理后的声音
Shine：
回复 user5321810:
调试的时候建议功能一个个往上加，这样可以排除是哪块引起的，接下来调通mcbsp+AIC23+DMA或mcbsp+AIC23+处理程序，最后调mcbsp+AIC23+DMA+处理程序。
user5321810：
回复 Shine:
我想问一下如果不采用DMA模式的话，直接用mcbsp+aic23+音频处理程序的话，我的数据处理程序怎么获取mcbsp接收到的数据？或者说我如何让mcbsp接收到的数据将其存在一个数组中，然后进行处理？
