Host Bus mode EPI consiguratio

Hiroyasu Tazawa1

Hi, Everyone

I have a question about EPI of TM4C129x.

We wanna use Host bus mode, ADMUX mmode.
Data sheet Table 11-7 says addressable memory are up to 512 MB
when BSEL=0.

but EPIADDRMAP register have up to 256MB.
Can you tell me how to set EPIADDRMAP register.

We set this Tivaware API.

EPIAddressMapSet(EPI0_BASE, EPI_ADDR_RAM_BASE_6|EPI_ADDR_RAM_SIZE_256MB);

I do not see up to 512MB configuration.

Best Regards
Hiroyasu

over 9 years ago

0 Amit Ashara over 9 years ago

TI__Guru**** 244400 points

Hello Hiroyasu

When using the ADDRMAP, you still need to configure the address size as 256MB. However due to the selection option as per table 11-7. it would yield 512MB

Regards
Amit

0 Amit Ashara over 9 years ago

TI__Guru**** 244400 points

Hello Hiroyasu

When using the address map register the setting for the size is still going to be 256MB. However due to specific selection options the mapping would be 512MB for this particular mode

Regards
Amit

0 Hiroyasu Tazawa1 over 9 years ago in reply to Amit Ashara

Guru 12350 points

Hi, Amit

I understood ADDRMAP register should be 256MB.
Thank you !

but I do not understand specific selection options.
What should We set ?

Best Regards
Hiroyasu

0 Amit Ashara over 9 years ago in reply to Hiroyasu Tazawa1

TI__Guru**** 244400 points

Hello Hiroyasu

You must set it for 256MB option

Regards
Amit

0 Hiroyasu Tazawa1 over 9 years ago in reply to Amit Ashara

Guru 12350 points

Hi, Amit

I do not understand.
Can you tell me which register should we set for 256MB option except this API ? when BSEL=0.

EPIAddressMapSet(EPI0_BASE, EPI_ADDR_RAM_BASE_6|EPI_ADDR_RAM_SIZE_256MB);

Best Regards
Hiroyasu

0 Amit Ashara over 9 years ago in reply to Hiroyasu Tazawa1

TI__Guru**** 244400 points

Hello Hiroyasu

There is only one register to program the size of the address space and there is only one API to do so which you have already mentioned. The setting of BSEL=0 is via the EPIHBConfigSet function.

Regards
Amit

0 Hiroyasu Tazawa1 over 9 years ago in reply to Amit Ashara

Guru 12350 points

Hi, Amit

I'm sorry. I wanna make sure about this.

Is it means TM4C129x can get access 512MB when set this API ?

EPIAddressMapSet(EPI0_BASE, EPI_ADDR_RAM_BASE_6|EPI_ADDR_RAM_SIZE_256MB);

Best Regards
Hiroyasu

0 Amit Ashara over 9 years ago in reply to Hiroyasu Tazawa1

TI__Guru**** 244400 points

Hello Hiroyasu

Yes, that is correct.

Regards
Amit

0 Hiroyasu Tazawa1 over 9 years ago in reply to Amit Ashara

Guru 12350 points

Hi, Amit

Thank you!
I got it.

Best Regards
Hiroyasu

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Host Bus mode EPI consiguratio