[fpc-devel] STM32F407 fun

[Michael Ring]

Aehm, and yes, I meant 128kb, not 128MB ;-)

Michael

Am 19.03.16 um 14:20 schrieb Michael Ring:
> OK, seems you are not using trunk or an outdated version of trunk as 
> there are quite a number of units for stm32f4 available in current trunk:
>
> stm32f401xx.pp
> stm32f407xx.pp
> stm32f411xe.pp
> stm32f429xx.pp
> stm32f446xx.pp
>
> So I'd recomment to either upgrade to current trunk or at least copy 
> the unit specially made for your chip to your installation and compile 
> it by adding it to the list of controller units in the embedded rtl 
> makefile and changing controllerunitstr to match the correct filename.
>
> Good that we agree that 128MB is the right memory size, I first 
> thought that you are using trunk and that the 128MB configured in the 
> cpuinfo are wrong and instead 112MB is correct.
> I haven't compiled for this chip for a while, I am mostly targeting 
> f401, f411 and lately the f469 chips (I really like the STM32F469 
> Discovery board) these days...
>
> Michael
>
> Am 19.03.16 um 14:03 schrieb Andrew Haines:
>> On 03/19/2016 07:36 AM, Michael Ring wrote:
>>
>>> Re-reading your initial mail I am kind of wondering what you 
>>> actually did ?
>>>
>>> When using -WpSTM32F407VG you will automagially use stm32f407xx.pp unit
>>> which is the correct one for your chip and also stack should be correct
>>> as ram size is set to 128MB.
>>>
>>
>> First off thanks for looking at this. I'm not sure where you are 
>> getting 128MB...?
>>
>>> How/why did you use STM32F429 unit for the chip?
>>
>> There was no entry in fpc for STM32F407VG. I added
>> +      (controllertypestr:'STM32F407VG'; 
>> controllerunitstr:'STM32F429';        cputype:cpu_armv7em; 
>> fputype:fpu_soft; flashbase:$08000000; flashsize:$00080000; 
>> srambase:$20000000; sramsize:$00020000),
>>
>>>
>>> Michael
>>
>>>> Am 19.03.16 um 12:36 schrieb Michael Ring:
>>>> /Are you sure about RAM? I checked in cpuinfo, it is set to 128MB, 
>>>> this />>/matches what is written in the user manual, (Page 70) 
>>>> />>//>>/http://www.st.com/st-web-ui/static/active/en/resource/technical/document/datasheet/DM00037051.pdf 
>>>
>> />>//>>
>>
>> On the first page of that link under memories it says:
>>
>> Up to 192+4 Kbytes of SRAM including 64-
>> Kbyte of CCM (core coupled memory) data
>> RAM.
>>
>> Looking in the C header file stm32f4xx.h I find:
>> #define CCMDATARAM_BASE       ((uint32_t)0x10000000) /*!< CCM(core 
>> coupled memory) data RAM(64 KB) base address in the alias region  */
>> #define SRAM1_BASE            ((uint32_t)0x20000000) /*!< SRAM1(112 
>> KB) base address in the alias region                             */
>> #define SRAM2_BASE            ((uint32_t)0x2001C000) /*!< SRAM2(16 
>> KB) base address in the alias region                              */
>>
>> So starting from SRAM1_BASE there is 128kB of contiguous memory.
>>
>> 1024 * 128 = $20000
>>
>> Looking at 
>> http://www.st.com/st-web-ui/static/active/en/resource/technical/document/datasheet/DM00071990.pdf 
>> for STM32F429VG is says:
>>  Up to 256+4 KB of SRAM including 64-KB
>> of CCM (core coupled memory) data RAM
>>
>> I couldn't find a specific header for the *29 chip but I'm assuming 
>> the extra 64kB memory it has is in that block so there is 192kB of 
>> memory. This matches the define for the *29 chip:
>> (controllertypestr:'STM32F429XG'; 
>> controllerunitstr:'STM32F429';        cputype:cpu_armv7em; 
>> fputype:fpu_soft; flashbase:$08000000; flashsize:$00100000; 
>> srambase:$20000000; sramsize:$00030000),
>>
>> 1024 * 192 = $30000
>>
>>
>> //>>/or are the last 16k for some special use? Could not find a hint 
>> while />>/quickly searching through the manual. />>//>>/Michael />>
>>
>> I attached the changes I made to include the stm32f407vg chip in fpc.
>>
>>
>>
>> Andrew
>>
>>
>>
>>
>> _______________________________________________
>> fpc-devel maillist  -fpc-devel at lists.freepascal.org
>> http://lists.freepascal.org/cgi-bin/mailman/listinfo/fpc-devel
>
>
>
> _______________________________________________
> fpc-devel maillist  -  fpc-devel at lists.freepascal.org
> http://lists.freepascal.org/cgi-bin/mailman/listinfo/fpc-devel

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.freepascal.org/pipermail/fpc-devel/attachments/20160319/65361456/attachment.html>