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AM2434: AM243x

Part Number: AM2434

Tool/software:

Hi there,

I am debugging issues with two am2434 in daisy chain, sitara-1 and sitara-2. I am interested in satara-2 in the daisy chain. CCS scripting 
The first setup usings two TI AM243-LP. I can perform ccs scripting successfully. I also see the console outputs that mostly matches TI documentation about CCS Scripting of AM243-LP.
After that I can download other application and get it executed.

The second setup uses two sitara chips on our own boards in daisy chain. With the same scripts, I cannot perform ccs scripting. 

Right now I run out of hypotheses. Therefore I want to check bootmode register, with which I can check if there is error in hardware. 

How to read out the value of CTRLMMR_MAIN_DEVSTAT?

Best,
Jinlong

Reading memory at two proxy addresses. The values are zero.