[fpc-devel] Arm Thumb2 - Stellaris status

[Geoffrey Barton]

On 19 Aug 2011, at 11:11, Florian Klämpfl wrote:

> Am 19.08.2011 12:02, schrieb John Clymer:
>> So, consensus is to include the register definitions - then I will work
>> on these.  To get all the possible register structures for all possible
>> peripherals will take some time.  And naming conventions come into play
>> as well.
>> 
>> I prefer having my device registers defined in structures.  Other people
>> prefer non-structured "flat" definitions for the registers.
>> 
>> i.e.
>> 
>> PortA -> DDR
>> PortA -> PIN

surely porta.ddr

>> 
>> vs.
>> 
>> DDRA
>> PINA
>> 
>> The current stellaris has a start for structures, unless there are
>> objections, I would continue with these.
>> 
>> The actual names of the registers will be best to match the datasheet
>> (otherwise, non-compiler writing / source reading people will need a
>> manual [and somewhat lengthy one at that] to provide the correcting
>> naming of each peripheral and register.)  

yes, it would be best to take them from the C definitions in 'stellarisware'. I shortened and changed some of them as they were unnecessarily flowery or obscure.

>> BUT - there is no standard for
>> what the peripheral structure instances should be named - so again, this
>> would need to be documented if the target audience is people that won't
>> be tearing the compiler apart.  [And again, more work...]
> 
> Afaik there is a standard for the Cortex platform how to do it, google
> for "ARM Cortex Microcontroller Software Interface Standard"

there is a generic doc on the arm.com site and a stellaris specific one on the TI site.