TI中文支持网Part Number:TMS320VC5509A
为什么DSP5509A采集得到的500Hz的正弦信号，CCS中的Graph显示的428Hz?采样频率为8k.
Shine：
在其他软件如matlab里显示也是一样吗？先确定数据源本身是不是500Hz。
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ang gao：
确定数据源是500Hz，在MATLAB也进行分析了，数据频率显示为428Hz，请问为什么会出现这样的问题？
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ang gao：
/******************************************************************************/
以下整个程序/*—————————————————————————-*//* DESCRIPTION: *//* *//* This is an example for EMIF of C5509 *//*—————————————————————————-*//* MODULE NAME… I2C and Mcbsp *//* FILENAME…… codec.c *//* DATE CREATED.. Mon 02/4/2004 *//* COMPONENT….. *//* PREREQUISITS.. *//*—————————————————————————-*//* 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>
#define CODEC_ADDR 0x1A#define nx 1024
void gengxin(DATA xn[nx], DATA x) { int i = 0; for (i = nx-1; i >=0; i–){ xn[i+1] = xn[i]; } xn[0] = x;}
//DATA xx[nx] = {-32768,-31744,-30720,-29696,-28672,-27648,-26624,-25600,-24576,-23552,-22528,-21504,-20480,-19456,// -18432,-17408,-16384,-15360,-14336,-13312,-12288,-11264,-10240,-9216,-8192,-7168,-6144,-5120,-4096,-3072,// -2048,-1024,0,1024,2048,3072,4096,5120,6144,7168,8192,9216,10240,11264,12288,13312,14336,15360,16384,17408,// 18432,19456,20480,21504,22528,23552,24576,25600,26624,27648,28672,29696,30720,31744};//DATA r[nx]={0};
/*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)};
unsigned int play_mode; // 0:play 1:record and play
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 */ 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};/* 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8K*/Uint16 sample_rate_control[2] = {0x10,0x2e};/*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Line，mic输入，增益为0*/Uint16 analog_aduio_path_control[2] ={0x08,0x14};/*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};/*定义McBSP的句柄*/MCBSP_Handle hMcbsp;
Uint16 i2c_status;Uint16 i,temp;DATA aic23data = 0;DATA aic23data1[nx] = {0};DATA aic23data2[nx] = {0};
void delay(Uint32 k){ while(k–);}
void main(void){
i2c_status = 1;
/* 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);
/* 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);
/*初始化McBSP0*/ hMcbsp = MCBSP_open(MCBSP_PORT1,MCBSP_OPEN_RESET); /*设置McBSP0*/ MCBSP_config(hMcbsp,&Mcbsp1Config); /*启动McBSP0*/ MCBSP_start(hMcbsp, MCBSP_RCV_START | MCBSP_XMIT_START, 0);
MCBSP_getConfig(hMcbsp,&Mcbsptest);
/*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 );
/*回放音频*/ int i = 0;
while(i<102400) { //sine(xx,r,nx);// for (i=0;i<1024;i++){ while(!MCBSP_xrdy(hMcbsp)){}; aic23data = MCBSP_read16(hMcbsp); gengxin(aic23data1,aic23data);// gengxin(aic23data2,aic23data);// rfft(aic23data1,nx, SCALE); //for(temp=3000;temp>0;temp–); while(!MCBSP_rrdy(hMcbsp)){}; MCBSP_write16(hMcbsp,aic23data);// for (i=0;i<nx;i++){// aic23data1[i] =aic23data;// }
// } i++;
}}
void Delay(unsigned int nDelay){ unsigned int ii,jj,kk=0; for ( ii=0;ii<nDelay;ii++ ) { for ( jj=0;jj<2048;jj++ ) { kk++; } }}
/******************************************************************************\* End of i2c2.c\******************************************************************************/
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Shine：
这个问题建议到音频论坛咨询AIC23的配置问题。https://e2echina.ti.com/support/audio/f/audio-forum
