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四片音频codec和DM8168的McASP接口相连,该如何连接

四片音频codec和DM8168的McASP接口相连,做音频数据采集,硬件改如何连接,软件上的分时复用该如何传数据,保证数据不丢失。

Shine:

一个codec接一路AXRn。

如果codec是多路的话,可以有两种接法,看一下user guide. 14.1.6.1.1 TDM Format http://www.ti.com/lit/ug/sprugx8c/sprugx8c.pdf

For example, a particular six channel DAC may be designed to transfer over a single serial data pin AXRn as shown in Figure 14-7. In this case the serial clock must run fast enough to transfer a total of 6 channels within each frame period. Alternatively, a similar six channel DAC may be designed to use three serial data pins AXR[0,1,2], transferring two channels of data on each pin during each sample period. In the latter case, if the sample period remains the same, the serial clock can run three times slower than the former case

hao hou2:

回复 Shine:

1,我要是有11路音频ADC输入,和路音频DAC输出,用DM8168是不是不够用,我看了3路McASP的数据接口只有10路。是不是不可以但是,框图上写着是Mcasp接口有16路数据(见附件)

2,DM8168的McASP接口和McBSP接口是否为复用接口,我在引脚定义上看了,有些引脚是复用的,但下图介绍是分开的

McASP
3 (1 Six-Serializer and 2 Dual Serializers, Each withTransmit and Receive and DIT Capability)

McBSP
1 (2 Data Pins, Transmit and Receive)

hao hou2:

回复 hao hou2:

11路音频ADC输入,和1路音频DAC输出

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