AM5706: CS configuration

Hello Stanley,

Thanks for your reply. It seemes to be wrongly verified. 

The below is my main question. Could you please check it?

>>CS3 is assinged to smaller address than CS2.
>>Is this configuration, larger number of CS area is assigned to smaller address area than smaller number of CS area,  allowed?

>For GPMC, please refer to TRM and SDK user guide for information. We won't be able to review configurations.

I checekd the register seetings, but I couldn't find anything wrong setting that could cause this problem.
Then I postes this question.

Regards,
Oba

Hello,

I have already read the TRM 15.4.4.8.1 again and again, but I coudn't find any descirption about the below my question.

>>CS3 is assinged to smaller address than CS2.
>>Is this configuration, larger number of CS area is assigned to smaller address area than smaller number of CS area,  allowed?

Regards,
Oba

Hello,

Based on the three CS area

CS0  0x0800_0000 ~ 0x09FF_FFFF
CS2  0x1800_0000 ~ 0x1FFF_FFFF
CS3  0x1000_0000 ~ 0x17FF_FFFF

we see that CS0 is 32 MB, CS2 & C3 are 128MB

Also, we see you memtioned:

CONFIG7_0   0x0000_0E48 or 0x0000_0848  -> why is there two values mentioned here? for 32MB CS size bit11:9 must be 0b1110

CONFIG7_2   0x0000_0858 

CONFIG7_3   0x0000_0850

Can you comment?

Thanks.

Hello,

Thanks for your reply.
They have 2 options, 32MB and 128MB, for CS0 on their board.

So the correct memory map is like the below.

CS0  0x0800_0000 ~ 0x0FFF_FFFF (128MB case) or 0x0800_0000 ~ 0x09FF_FFFF (32MB case)
CS2  0x1800_0000 ~ 0x1FFF_FFFF
CS3  0x1000_0000 ~ 0x17FF_FFFF

Regards,
Oba

Okay, in that case, we do not see any issue with the CONFIG7 registers for CS0, CS2, and CS3.

Have other config register values verified for the different CS? Is this the first time GPMC has been used by the customer or it is an update from previous? Also, what is the reference being used for these, what is the OS used here?

Also, we would like to let you know that we can provide limited support on GPMC as there is an expertise gap in our team. Our suggestion is TRM and to look at the working reference code to resolve.

Thanks.

Hell Praveen,

The OS is TI-RTOS. Other CS areas work well.
They have already released some prodocuts with other AM57xx part number using GPMC.
I'm asking to test with CS3 changing the address larger than CS2 just to see if the signals output or not.

Regards,
Oba

Hello Praveen,

They finally found the root cause which was due to a MMU configuration.
You can close this thread.

Thank you very much for your support.

Regards,
Oba

Thanks for the note! will close the thread.