/******************************************************************************/ /* 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 */ /******************************************************************************/