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Discussion Groups | TMS320C28x | Problems with McBSP Interprocessor communication

Technical discussions about the TI C28x DSPs (including the C2810, C2811, C2812, F2801, F2806, F2808, F2810,, F2811, F2812, R2811 and R2812).

  

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Problems with McBSP Interprocessor communication - arm_techie arm_user - Nov 21 9:41:05 2007



Hi all,
      I am using TI's TMS320F2812 for my project. My architecture goes
like this.  I have one master DSP which has to talk to 3 Slave DSPs.
For this I am using McBSP port.
I have many doubts in this.
1. How are the synchronization issues handled if you are using McBSP?
2. How can I use the TDM feature of the McBSP?
3.
Companding, which happens to be the major advantage of McBSP also is
not working fine in my case.
If I disable companding, it works fine in loopback mode.
If I enable companding in loopback mode, my communication goes like this.

If I transmit '0', I am getting '0'
If I transmit '1', I am getting '2'
If I transmit '2', I am getting '2'
If I transmit '3', I am getting '4'
If I transmit '4', I am getting '4'
and goes on like this.

I dont know what the problem is.  Are there any clock issues?

If anybody has a working code, kindly share that with me.

Help of any sort is greatly appreciated.
-- 
With Regards,
OST
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