TI中文支持网求助问题分析思路
user151383853：
不能排除, 非常可能. 还是先检查硬件比较简单, 包括焊接, 电源, 连线 等等因素.
aaron song：
回复 user151383853:
放大器没有问题，ad也有输出，串行输出高低电平，但是就是读到的数据是0xffff
Flora Wang：
你好：
可否详细描述你的问题，例如以下几点：
1.应用场景
2.系统框图
3.硬件电路
4.软件配置
5.已经做过什么检查
aaron song：
回复 Flora Wang:
您好，新年快乐！
我来描述一下各个问题，感谢您的解答
1：应用于采集信号，信号电平大约在300mv左右的正弦信号。
2：我采用ti的28069dsp作为主机采集ak5357vt(数据手册见附录) 输出的电平，总线是i2s，通过28069的mcbsp进行采集，其中主机生成了触发信号，主时钟，和串行数据时钟，从机输出采样后的高低电平信号输出。
3：附录是我的硬件电路。
4：附录附上我的软件配置，主要是mcbsp的配置。
aaron song：
回复 Flora Wang:
这个附录是我的软件设置
void initmcbsp() {EALLOW;////////////////////////////////////McbspaRegs.SPCR1.bit.RRST=0; // Receiver resetMcbspaRegs.SPCR2.bit.FRST=0;McbspaRegs.SPCR2.bit.GRST=0;//////////////////////////////////McbspaRegs.SPCR1.all=0x2000;McbspaRegs.RCR1.all=0x00A0;McbspaRegs.RCR2.all=0x80A6;McbspaRegs.SRGR1.all=0X219F;McbspaRegs.SRGR2.all=0x3041;McbspaRegs.SRGR1.bit.CLKGDV=5;McbspaRegs.PCR.bit.FSRM=1;McbspaRegs.PCR.bit.CLKRM=1;McbspaRegs.PCR.bit.CLKRP=1;McbspaRegs.PCR.bit.SCLKME=0;McbspaRegs.PCR.bit.FSRP=0;McbspaRegs.SRGR2.bit.FPER=65;McbspaRegs.SRGR1.bit.FWID=33;McbspaRegs.RCR1.bit.RFRLEN1=1;McbspaRegs.RCR2.bit.RFRLEN2=1;McbspaRegs.RCR2.bit.RPHASE=1;McbspaRegs.RCR1.bit.RWDLEN1=5;McbspaRegs.RCR2.bit.RWDLEN2=5;McbspaRegs.RCR2.bit.RFIG=1;McbspaRegs.RCR2.bit.RCOMPAND=00;McbspaRegs.RCR2.bit.RDATDLY=01;McbspaRegs.SPCR1.bit.RJUST=0x00b;McbspaRegs.SPCR1.bit.RRDY=0;McbspaRegs.PCR.bit.CLKRP=0;asm (" NOP ");// Wait at least 2 SRG clock cyclesasm (" NOP ");McbspaRegs.SPCR2.bit.FREE=1;McbspaRegs.SPCR2.bit.SOFT=0;McbspaRegs.SPCR2.bit.GRST=1;McbspaRegs.SPCR1.bit.RRST=1;McbspaRegs.SPCR2.bit.FRST=1;asm (" NOP ");// Wait at least 2 SRG clock cyclesasm (" NOP ");asm (" NOP ");// Wait at least 2 SRG clock cyclesasm (" NOP ");asm (" NOP ");// Wait at least 2 SRG clock cyclesasm (" NOP ");asm (" NOP ");// Wait at least 2 SRG clock cyclesasm (" NOP ");asm (" NOP ");// Wait at least 2 SRG clock cyclesasm (" NOP ");asm (" NOP ");// Wait at least 2 SRG clock cyclesasm (" NOP ");asm (" NOP ");// Wait at least 2 SRG clock cyclesasm (" NOP ");asm (" NOP ");// Wait at least 2 SRG clock cyclesasm (" NOP ");asm (" NOP ");// Wait at least 2 SRG clock cyclesasm (" NOP ");asm (" NOP ");// Wait at least 2 SRG clock cyclesasm (" NOP ");asm (" NOP ");// Wait at least 2 SRG clock cyclesasm (" NOP ");// Receiver resetasm (" NOP ");// Wait at least 2 SRG clock cyclesasm (" NOP ");EDIS;asm (" NOP ");asm (" NOP ");// Wait at least 2 SRG clock cyclesasm (" NOP ");}
aaron song：
回复 aaron song:
这个附录是我所采用的ad芯片数据手册
aaron song：
回复 aaron song:
顶
aaron song：
回复 aaron song:
目前从串行数据看，到ad输出这一部分没有问题，但是为何drr寄存器中的值始终为0xffff，不得而知！~！！！！！！！！
Flora Wang：
回复 aaron song:
你好：
建议检查DSP的方面的软件配置，阅读AK5357的数据手册检查问题。
很抱歉AK5357不是TI的产品，我也不是很熟悉。
Jiantao Liu：
回复 Flora Wang:
这位老师，我看你回答了好多帖子的问题特别热心，能在这里问你个问题吗？问题如下，请帮忙解决
我用的板子是TMS320VC5509A,我想用它来采集声音信号，在官方提供的第27个例子中，连接电脑能听到电脑播放的音乐，如果我想在输入口接个麦克风采集声音信号，该怎么处理呢？直接用这个程序能不能实现，我用的是虚拟机XP系统，我现在直接用程序的话，感觉麦克风不起作用，运行后有噪音，这个是什么问题我该怎么解决？
程序如下：#include <csl.h>#include <csl_i2c.h>#include <stdio.h>#include <csl_pll.h>#include <csl_mcbsp.h>#define CODEC_ADDR 0x1A/*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;/*设置McBSP,使用McBSP1来发送和接收来自DSP 和 AIC23的数据*//*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,禁止数字回环方式 */ MCBSP_SPCR1_RJUST_LZF, /* RJUST = 2 接收数据符号扩展和调节方式*/ MCBSP_SPCR1_CLKSTP_DISABLE, /* CLKSTP = 0 */ MCBSP_SPCR1_DXENA_ON, /* DXENA = 1 DX引脚延时使能打开*/ 0, /* ABIS = 0 */ MCBSP_SPCR1_RINTM_RRDY, /* RINTM = 0 接收中断模式*/ 0, /* RSYNCER = 0 接收帧同步错误标志*/ MCBSP_SPCR1_RRST_DISABLE /* RRST = 0 禁止接收器复位*/ ), MCBSP_SPCR2_RMK( MCBSP_SPCR2_FREE_NO, /* FREE = 0 */ MCBSP_SPCR2_SOFT_NO, /* SOFT = 0 */ MCBSP_SPCR2_FRST_FSG, /* FRST = 0 帧同步逻辑复位 */ MCBSP_SPCR2_GRST_CLKG, /* GRST = 0 采样率发生器复位 */ MCBSP_SPCR2_XINTM_XRDY, /* XINTM = 0 发送中断模式*/ 0, /* XSYNCER = N/A */ MCBSP_SPCR2_XRST_DISABLE /* XRST = 0 发送器复位*/ ), /*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 接收阶段1的帧长为1个字 */ MCBSP_RCR1_RWDLEN1_16BIT /* RWDLEN1 = 2 接收阶段1的字长为16位 */ ), MCBSP_RCR2_RMK( MCBSP_RCR2_RPHASE_SINGLE, /* RPHASE = 0 接收帧的阶段数*/ MCBSP_RCR2_RFRLEN2_OF(0), /* RFRLEN2 = 0 接收阶段2关闭*/ MCBSP_RCR2_RWDLEN2_8BIT, /* RWDLEN2 = 0 接收阶段2的字长为8位*/ MCBSP_RCR2_RCOMPAND_MSB, /* RCOMPAND = 0 接收数据压扩模式*/ MCBSP_RCR2_RFIG_YES, /* RFIG = 0 忽略不期望接收的帧同步信号 */ MCBSP_RCR2_RDATDLY_1BIT /* RDATDLY = 1 接收数据延时*/ ), MCBSP_XCR1_RMK( MCBSP_XCR1_XFRLEN1_OF(1), /* XFRLEN1 = 1 发送阶段1的帧长(一个）*/ MCBSP_XCR1_XWDLEN1_16BIT /* XWDLEN1 = 2 发送阶段1的字长16位*/ ), 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 发送数据延时*/ ), 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}; /*创建和初始化I2C模块*/ /* 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};/*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};/*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};/*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;void delay(Uint32 k){ while(k–);}void main(void){ Uint16 aic23data = 0; i2c_status = 1; /* Initialize CSL library – This is REQUIRED !!! */ /*初始化CSL库*/ CSL_init(); /*设系统的运行速度为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 指向发送数据的数组 2, //length of data to be transmitted 发送数据的长度16位 1, //master or slaver 主模式 CODEC_ADDR, //slave address to transmit to 从地址发送 1, //transfer mode of operation 传输模式 30000 //time out for bus busy 延时 ); delay(1000); /*设置AIC23各部分均工作*/ i2c_status = I2C_write( power_down_control,//pointer to data array 省电控制 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 数字音频格式 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 模拟音频格式 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 数字音频通路控制 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 采样速率 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 耳机左声道音量调节 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 耳机右声道音量调节 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 左声道音量调节 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 右声道音量调节 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 数字接口激活 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*/ while(TRUE) { while(!MCBSP_rrdy(hMcbsp)){}; aic23data = MCBSP_read16(hMcbsp); MCBSP_write16(hMcbsp,aic23data); }}还有就是，我要先看声音信号的图，那么我的开始地址应该设为哪个参数呢？这个程序的输入数据在什么地方体现？
