/******************************************************************************/
/* this program 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 <csl_irq.h>
#include <math.h>
#include <function.h>
#include <csl_dma.h>
#define State_Signal_Process 1
/* Define transmit and receive buffers */
int pingrcv[FRAME_LENGTH];
int pongrcv[FRAME_LENGTH];
int pingxmt[FRAME_LENGTH];
int pongxmt[FRAME_LENGTH];
int Leftchannel_Buffer[FRAME_LENGTH];
int Rightchannel_Buffer[FRAME_LENGTH];
int xfreebuf;
int rfreebuf;
int State_Work=0;
//volatile Uint16 transferComplete = FALSE;
Uint16 old_intm;
Uint16 rcvEventId;
Uint16 xmtEventId;
//---------Function prototypes---------
/* Reference start of interrupt vector table */
/* This symbol is defined in file, vectors.s55 */
extern void VECSTART(void);
void delay(Uint32 k);
void I2C_Set_Init();
void McBSP_Set_Init();
void DMA_DataTransfer_Init();
void Signal_Process();
/* Protoype for interrupt functions */
interrupt void dmaXmtIsr(void);
interrupt void dmaRcvIsr(void);
/*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 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
};
DMA_Config dmaRcvConfig = {
DMA_DMACSDP_RMK(
DMA_DMACSDP_DSTBEN_NOBURST,/* DSTBEN = 0 */
DMA_DMACSDP_DSTPACK_OFF,/* DSTPACK = 0 */
DMA_DMACSDP_DST_DARAM,/* DST = 1 */
DMA_DMACSDP_SRCBEN_NOBURST,/* SRCBEN = 0 */
DMA_DMACSDP_SRCPACK_OFF,/* SRCPACK = 0 */
DMA_DMACSDP_SRC_PERIPH,/* SRC = 3 */
DMA_DMACSDP_DATATYPE_16BIT/* DATATYPE = 1 */
),/* DMACSDP源和目标参数寄存器 */
DMA_DMACCR_RMK(
DMA_DMACCR_DSTAMODE_POSTINC,/* DSTAMODE = 1 */
DMA_DMACCR_SRCAMODE_CONST,/* SRCAMODE = 0 */
DMA_DMACCR_ENDPROG_ON,/* ENDPROG = 1 */
DMA_DMACCR_REPEAT_OFF,/* REPEAT = 0*/
DMA_DMACCR_AUTOINIT_OFF,/* AUTOINIT = 1 */
DMA_DMACCR_EN_STOP,/* EN = 0 */
DMA_DMACCR_PRIO_HI,/* PRIO = 1 */
DMA_DMACCR_FS_DISABLE,/* FS = 1 */
DMA_DMACCR_SYNC_REVT0/* SYNC = 5 DMA_DMACCR_SYNC_NONE*/
),/* DMACCR 通道控制寄存器 */
DMA_DMACICR_RMK(
DMA_DMACICR_BLOCKIE_OFF,/* BLOCKIE = 0 */
DMA_DMACICR_LASTIE_OFF,/* LASTIE = 0 */
DMA_DMACICR_FRAMEIE_ON,/* FRAMEIE = 1 */
DMA_DMACICR_FIRSTHALFIE_OFF,/* FIRSTHALFIE = 0 */
DMA_DMACICR_DROPIE_OFF,/* DROPIE = 0 */
DMA_DMACICR_TIMEOUTIE_OFF/* TIMEOUTIE = 0 */
), /* DMACICR 中断控制寄存器*/
(DMA_AdrPtr)(MCBSP_ADDR(DRR10)), /* DMACSSAL 源起始地址低位寄存器*/
0, /* DMACSSAU 源起始地址高位寄存器*/
(DMA_AdrPtr)&pingrcv, /* DMACDSAL 目标起始地址低位寄存器*/
0, /* DMACDSAU 目标起始地址高位寄存器*/
FRAME_LENGTH, /* DMACEN 要素个数寄存器，装入每帧的要素数*/
1, /* DMACFN 帧数寄存器，装入每块的帧数*/
0, /* DMACFI 帧索引寄存器*/
0 /* DMACEI 要素索引寄存器*/
};
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_OFF,
DMA_DMACCR_AUTOINIT_OFF, //Auto initialization bit :-
DMA_DMACCR_EN_STOP, //Channel enable :-设置时先关闭通道
DMA_DMACCR_PRIO_HI, //Channel priority :-设置为低优先级
DMA_DMACCR_FS_DISABLE, //Frame/Element Sync :-单元事件同步
DMA_DMACCR_SYNC_XEVT0 //Synchronization control :-McBSP1 Transmit Event(XEVT1)
), /* DMACCR 通道控制寄存器 */
DMA_DMACICR_RMK(
DMA_DMACICR_BLOCKIE_OFF, //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_ON, //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(DXR10)), /* DMACDSAL 目的地址低位*/
0, /* DMACDSAU 目的地址高位*/
FRAME_LENGTH, /* DMACEN 1 帧内数据长度 16*2 两个数据一个帧*/
1, /* 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*/
};
/*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] = {0x10,0x20};
/*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,0x01};
/*AIC23模拟音频的控制
DAC使能，ADC输入选择为MIC*/
Uint16 analog_aduio_path_control[2] ={0x08,0x15};
/*AIC23数字音频通路的控制*/
Uint16 digital_audio_path_control[2] ={0x0a,0x05};
/*AIC23数字接口的激活*/
Uint16 digital_interface_activation[2] ={0x12,0x01};
/*AIC23左通路音频调节*/
Uint16 left_line_input_volume_control[2] ={0x00,0x00};
/*AIC23右通路音频调节*/
Uint16 right_line_input_volume_control[2] ={0x02,0x00};
/*AIC23耳机左通路音频调节*/
Uint16 left_headphone_volume_control[2] ={0x05,0x79};
/*AIC23耳机右通路音频调节*/
Uint16 right_headphone_volume_control[2] = {0x07,0x79};
/*定义McBSP的句柄*/
MCBSP_Handle hMcbsp;
MCBSP_Config Mcbsptest;
I2C_Config testI2C;
/*定义DMA的句柄*/
DMA_Handle hDmaRcv;
DMA_Handle hDmaXmt;
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);
/*初始化I2C */
I2C_Set_Init();
/*初始化McBSP */
McBSP_Set_Init();
/*初始化DMA */
DMA_DataTransfer_Init();
while(TRUE){
if(State_Work==State_Signal_Process){
Signal_Process();
State_Work=0;
}
}
}
void delay(Uint32 k){
while(k--);
}
void I2C_Set_Init(){
/* 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--master
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 McBSP_Set_Init(){
/* Open MCBSP Port 1 and set registers to their power on defaults */
hMcbsp = MCBSP_open(MCBSP_PORT0,MCBSP_OPEN_RESET);
/* Write values from configuration structure to MCBSP control regs */
MCBSP_config(hMcbsp,&Mcbsp1Config);
/* Start Sample Rate Generator and Enable Frame Sync */
MCBSP_start(hMcbsp,
MCBSP_SRGR_START | MCBSP_SRGR_FRAMESYNC,
0x300u);
/* Take MCBSP transmit and receive out of reset */
MCBSP_start(hMcbsp,
MCBSP_XMIT_START | MCBSP_RCV_START,
0u);
// MCBSP_start(hMcbsp,
// MCBSP_RCV_START | MCBSP_XMIT_START,
// 0);
MCBSP_getConfig(hMcbsp,&Mcbsptest);
}
void DMA_DataTransfer_Init()
{
Uint16 srcAddrHi, srcAddrLo;
Uint16 dstAddrHi, dstAddrLo;
int i;
//乒乓数组初始化
for(i=0;i<FRAME_LENGTH;i++){
pingrcv[i] = 0;
pongrcv[i] = 0;
pingxmt[i] = 0;
pongxmt[i] = 0;
}
xfreebuf = xpongbuf;
rfreebuf = rpongbuf;
/* Set IVPD/IPVH to start of interrupt vector table */
IRQ_setVecs((Uint32)(&VECSTART));
/* 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.
* MCBSP_ADDR()函数用来取址，DRR11是数据接收寄存器，即DMA寄存器从此接收数据
* 表示DMA从MCBSP传数据到pingrcv*/
srcAddrHi = (Uint16)(((Uint32)(MCBSP_ADDR(DRR10))) >> 15) & 0xFFFFu;
srcAddrLo = (Uint16)(((Uint32)(MCBSP_ADDR(DRR10))) << 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;
/* 表示DMA从pingxmt传数据到MCBSP*/
srcAddrHi = (Uint16)(((Uint32)(&pingxmt[0])) >> 15) & 0xFFFFu;
srcAddrLo = (Uint16)(((Uint32)(&pingxmt[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 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 加上去的*/
/* 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 Interrupt Vector Start Location */
IRQ_setVecs(0x10000);
/* Place DMA interrupt service addresses at associate vector
* 连接两个中断函数*/
IRQ_plug(xmtEventId,&dmaXmtIsr);
IRQ_plug(rcvEventId,&dmaRcvIsr);
/* Write values from configuration structure to DMA control regs */
DMA_config(hDmaRcv,&dmaRcvConfig);
DMA_config(hDmaXmt,&dmaXmtConfig);
/* Enable all maskable interrupts */
IRQ_globalEnable();
/* Enable DMA */
DMA_start(hDmaRcv);
DMA_start(hDmaXmt);
/* 获取DMAD的MACCR寄存器ENDPROG字段值，为1表示编程结束。
* */
while(DMA_FGETH(hDmaRcv, DMACCR, ENDPROG));
/* 表示DMA从pongxmt传数据到pongrcv*/
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;
/* 赋值DMAD的MACCR寄存器ENDPROG字段，为1表示编程结束。
* */
DMA_FSETH(hDmaRcv, DMACCR, ENDPROG,1);
DMA_FSETH(hDmaXmt, DMACCR, ENDPROG,1);
}
/*播放声音的中断*/
interrupt void dmaXmtIsr(void) {
printf("……进入中断 dmaXmtIsr……\n");
static int * ptr;
unsigned int ptraddrhi, ptraddrlow;
/* 赋值DMAD的DMACSR寄存器BLOCK字段，为0表示整块时间没有发生，为1表示整块已经传输完毕，一个中断请求已经发送给CPU。
* */
DMA_FSETH(hDmaXmt,DMACSR,FRAME,0);
if(xfreebuf == xpingbuf){
xfreebuf = xpongbuf;
ptr = pongxmt;
}else{
xfreebuf = xpingbuf;
ptr = pingxmt;
}
/* 获取DMAD的MACCR寄存器ENDPROG字段值，为1表示编程结束。
* */
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);
}
/*接受声音的中断*/
interrupt void dmaRcvIsr(void) {
printf("……进入中断 dmaRcvIsr……\n");
static int * ptr;
unsigned int ptraddrhi, ptraddrlow;
DMA_FSETH(hDmaRcv,DMACSR,FRAME,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 Signal_Process()
{
printf("……进入处理函数 Signal_Process……\n");
Uint16 i,j=0;
if(rfreebuf == rpongbuf){ //(PingPong == PING)
for(i=0;i<FRAME_LENGTH;i=i+2){
Leftchannel_Buffer[j] = pongrcv[i];
Rightchannel_Buffer[j] = pongrcv[i+1];
j++;
}
}else{
for(i=0;i<FRAME_LENGTH;i=i+2){
Leftchannel_Buffer[j] = pingrcv[i];
Rightchannel_Buffer[j] = pingrcv[i+1];
j++;
}
}
j = 0;
if(xfreebuf == xpongbuf){
for(i=0;i<FRAME_LENGTH;i=i+2){
pongxmt[i] = Leftchannel_Buffer[j];
pongxmt[i+1] = Rightchannel_Buffer[j];
j++;
}
}else{
for(i=0;i<FRAME_LENGTH;i=i+2){
pingxmt[i] = Leftchannel_Buffer[j];
pingxmt[i+1] = Rightchannel_Buffer[j];
j++;
}
}
}
/******************************************************************************/
/* End of main.c */
/******************************************************************************/
