[fpc-devel] Teensy (no OS) programmed with Free Pascal Embedded ARM

[Jeppe Johansen]

Well I think it might be too much for now. Haven't really maintained it 
since then

Anyway, from what I found last I tried with your headers I think there 
could be some improvement that might instead warrant their inclusion 
into SVN.
The main point back then was that the size was pretty tremendous.

To reduce size:
- Similar types be in common records. What I found was that using your 
generated headers for the STM32F7xx HAL required a lot of casting 
because all the GPIO records, for example, for all the different ports 
were different types. This cause duplication of all the helpers too.
- Could the helpers be in external units?
- Have an option to remove comments? Not sure how much this would give

Another thing was things like repeated sub records. CAN mailboxes or DMA 
channel streams all had the repeated registers, while the existing 
firmware codebase used arrays of records.
This probably changes from manufacturer to manufacturer but it might be 
nice to reduce size, and probably wouldn't require a lot of change when 
porting code.

Actually, maybe also not emit the bitband records? So far I've never 
once seen it used in normal code, and the places where it could be 
useful you might just as well calculate the offset yourself, or refer to 
it in an external unit(maybe one with the helpers? :)

Best Regards,
Jeppe

On 10/11/2015 11:02 PM, Michael Ring wrote:
> The code that makes the compiler work with conf files:
>
> fpc -Fb*.conf
>
> [ring at macbookpro-wlan stm32f407vg]$ cat stm32f4xx.conf
> STM32F401CB,stm32f401x,stm32f4xx.lkr,%FLASHBASE:0x08000000,%FLASHSIZE:0x00020000,%SRAMBASE:0x20000000,%SRAMSIZE:0x00010000 
>
> STM32F401RB,stm32f401x,stm32f4xx.lkr,%FLASHBASE:0x08000000,%FLASHSIZE:0x00020000,%SRAMBASE:0x20000000,%SRAMSIZE:0x00010000 
>
> STM32F401VB,stm32f401x,stm32f4xx.lkr,%FLASHBASE:0x08000000,%FLASHSIZE:0x00020000,%SRAMBASE:0x20000000,%SRAMSIZE:0x00010000 
>
>
>
> Am 11.10.15 um 22:58 schrieb Jeppe Johansen:
>> Not sure what you are referring to here?
>>
>> On 10/11/2015 10:47 PM, Michael Ring wrote:
>>> I want to interface my Freedom-K64F code with this lib, on first 
>>> view this looks pretty straightforward. Any chance to get your great 
>>> patch for the use on arbitrary system units into trunk ? (the one 
>>> you wrote for me to make cmsis work)
>>>
>>> Am 11.10.15 um 22:33 schrieb Jeppe Johansen:
>>>> On 10/11/2015 10:10 PM, Michael Ring wrote:
>>>>> Wow Jeppe, I am impressed, you used your time much better than I 
>>>>> did, your port looks pretty complete!
>>>>>
>>>>> Please have a look at
>>>>>
>>>>> https://github.com/yunkot/pxl
>>>>>
>>>>> this lib was mentioned yesterday on lazarus list, this looks like 
>>>>> a good layer above the lowlevel code, there are already 
>>>>> implementations for several sensors and displays and it already 
>>>>> supports Raspberry Pi.
>>>>>
>>>>> The Author is also thinking about extending the lib in the 
>>>>> direction of microcontrollers, so those two efforts combined could 
>>>>> some day get a very user friendly solution that is a lot closer to 
>>>>> what mbed is for the C guy today to what we have right now.
>>>>>
>>>>> Michael
>>>> Thanks :)
>>>>
>>>> Yeah, that PXL library looks like it has a lot of code already. 
>>>> Could be a great project to combine it with for sure!
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