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合众达5509dsk，AIC23B播放音频，McBSP1配置为AIC23b的数据口，I2C为控制口<br />aic23b配置如下：<br />/*数字音频接口格式设置<br />AIC23为主模式，数据为DSP模式，数据长度16位*/ <br />Uint16 digital_audio_inteface_format[2]={0x0e,0x53};<br />/*AIC23的波特率设置，采样率为44.1K*/<br />Uint16 sample_rate_control[2] = {0x10,0x23};<br />/*AIC23寄存器复位*/<br />Uint16 reset[2] ={0x1e,0x00};<br />/*AIC23节电方式设置，所有部分均所与工作状态*/<br />Uint16 power_down_control[2] ={0x0c,0x00};<br />/*AIC23模拟音频的控制<br />DAC使能，ADC输入选择为Line*/<br />Uint16 analog_aduio_path_control[2] ={0x08,0x10};<br />/*AIC23数字音频通路的控制*/<br />Uint16 digital_audio_path_control[2] ={0x0a,0x01};<br />/*AIC23数字接口的使能*/<br />Uint16 digital_interface_activation[2] ={0x12,0x01};<br />/*AIC23左通路音频调节*/<br />Uint16 left_line_input_volume_control[2] ={0x01,0x17};<br />/*AIC23右通路音频调节*/<br />Uint16 right_line_input_volume_control[2] ={0x3,0x17};<br />/*AIC23耳机左通路音频调节*/<br />Uint16 left_headphone_volume_control[2] ={0x05,0xFF};<br />/*AIC23耳机右通路音频调节*/<br />Uint16 right_headphone_volume_control[2] = {0x07,0xFF};<br /><br /> I2C_RSET(I2CMDR,0);<br /> /*设置预分频寄存器,I2C的mode clock is 12MHz*/<br /> I2C_RSET(I2CPSC,0xb);<br /> I2C_RSET(I2CMDR,0x4620);<br /> <br />// I2C_setup(&I2Cinit);<br /> /*设置Ｉ２Ｃ的Mater clock*/<br /> I2C_RSET(I2CCLKL,55);<br /> I2C_RSET(I2CCLKH,55);<br /><br /> /*回放音频*/<br /> aic23data= 0xff;<br /> MCBSP_write16(hMcbsp,aic23data); <br /><br /><br /> while(TRUE)<br /> {<br /> while(!MCBSP_rrdy(hMcbsp)){};<br /> aic23data = MCBSP_read16(hMcbsp);<br /> MCBSP_write16(hMcbsp,aic23data); <br /> }; <br /><br />以上为codec例程配置，运行回放音频，从mic输入，headphone输出，可以<br />后改动如下：<br /><br /> while(TRUE)<br /> {<br /> <br /> while(!MCBSP_xrdy(hMcbsp)){};<br /><br /> fat16_read_file(&fp, buf, 4); //读4个字节至buf<br /> aic23data[0] = (Uint16) buf[0] | (Uint16) buf[1]<< 8 ;<br /> aic23data[1] = (Uint16) buf[2] | (Uint16) buf[3]<< 8 ;<br /> MCBSP_write16(hMcbsp,aic23data[0]); <br /> MCBSP_write16(hMcbsp,aic23data[1]); <br /> i += 4; <br /> }; <br />fp为PCM数据文件，16位双声道数据格式，<br />headphone输出的声音完全不对<br />请教：程序错在哪里，如果改正，谢谢。<br /><br /> |
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