A2B MIC CONFIG

Question

Hi, 
 My A2B bus includes 3 node,one 2428 as master,two 2427(microphone) as slave nodes.i2c command list generated by sigma studio 4.5. 
 A2B config function returns success,but no output on TX0 of 2428,please help! 
 attachment include dsp code and sigma project. A2B_mic.rar

arunk · Accepted Answer

1. Initially the issue was with C file and XML file. Is that over ? Ideally there should not be any difference if you do that in the code. 
 I hope you are using Command List Export by right clicking on the Target Processor and Clicking Export System Configuration Files. We have tried multiiple configuration in C and XML and none of them gave any issue. 
 Please clarify, If no output at TX0 of AD2428 or no output at the output of the Audio DSP ? 
 2. The last issue you had mentioned, after changing the node AD2427-> AD2428, is that in the sigma studio or did you change the nodes in the physical environment ? 
 If physically changing the node gave you good results then the issue can be with the nodes you are using. May be you can try to swap Subnode0 and Subnode1 and have a try, If subnode0 is the failure one , then it can help to troubleshoot the issue. 
 Binge said: what is the different between ad2428 and ad2427 
 The difference between the AD2427 and AD2428 is AD2427 just support subnode capable device only and support PDM and no TDM/I2S support. But AD2428 support TDM/PCM/I2S and can be configured as either main node or subnode.)

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A2B MIC CONFIG