您好！
我们计划将 TI 编解码器 TLV320AIC3204与基于 Qualcomm 820的定制板配合使用、但由于某些问题、捕捉无法与当前配置配合使用。 捕获的数据为全零(应用 MCLK 时)或一些垃圾(未应用 MCLK 时)、无法播放。
我们使用 TLV320AIC3204 EVM 进行初始验证
我们在从模式下使用 TI 编码、在捕获时应用以下时钟。
MCLK - 24MHz (外部生成)
BCLK - 1.53MHz (由820电路板生成)
WCLK - 48 KHz (由820电路板生成)
我们使用板载 MIC (in3线路)进行捕获、所有 W1至 W8跳线都设置为其默认位置。
下面是用于捕获的 I2C 寄存器配置。
第0页
0 1 2 3 4 5 6 7 8 9 A b c d e f 0123456789abcdef
00：00 00 00 50 00 11 04 00 00 00 01 00 80 02 P.P.？？？？？？？？？？？？
10：00 08 01 80 01 00 04 00 01 00 00 00 01 00 01 31。 ？？？？？1.
20：02 0c 00 44 00 00 00 00 00 00 00 00 00 00 00 00 00？？..
30：00 00 00 00 04 02 03 02 02 00 00 00 01 01 00 14……？？？ ...？？？
40：0C 00 00 6F 38 00 00 00 00 00 00 10 D8 7e E3 ?...o8… ？？？~？
50：00 00 10 00 80 00 0A 00 00 00 00 00 00 00 00 00 00 00 00 ...？...？
60：0A 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00..........
70：00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
80：00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
90：00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
A0：00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
B0：00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
C0：00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
D0：00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
E0：00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
F0：00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
第1页
0 1 2 3 4 5 6 7 8 9 A b c d e f 0123456789abcdef
00：01 08 01 00 00 00 00 00 00 00 00 10 00 00 00 00？？？ ？。
10：40 40 40 40 00 00 00 00 00 00 00 00 00 00 00 00 @@@@……
20：00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
30：00 00 00 40 04 00 04 00 00 00 00 46 46 00 00 00 00 ...@？... FF ...
40：00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
50：00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
60：00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
70：00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
80：00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
90：00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
A0：00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
B0：00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
C0：00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
D0：00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
E0：00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
F0：00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
我们正面临以下两个问题。
当应用24MHz MCLK 时
在使用"tinyCAP"实用程序捕获音频时、转储文件包含的数据全部为零。 I2C 命令在捕获开始后将所有寄存器返回为 XX、并保持原样、直到下次重新启动。
当24MHz MCLK 被移除时
捕获显示文件中的一些数据、但尝试使用"tinyplay"实用程序播放该文件时显示错误消息"Error:'/data/rec.wav is not a riff/wave file"。
在上述两种情况下、如果我检查 DIN/DOUT 测试引脚、则在开始捕获时电压没有明显变化。 电压保持在400mV 至800mV 左右。
谢谢、
Pratik
