Re: [Paparazzi-devel] ARM Cortex-M4

[Eric Parsonage]

Hey Piotr

I am more than happy to have a go at putting a toolchain together for this.

Eric


On 14/10/2011, at 6:59 PM, Piotr Esden-Tempski wrote:

> It is great to hear that SAT works for it. I did not get around to try it 
> yet. (got the board just yesterday)
> 
> What are you using to flash the chip?
> 
> Cheers Esden
> 
> On Oct 14, 2011, at 1:12 AM, Hector Garcia de Marina wrote:
> 
>> Hello Piotr,
>> 
>> already I am using g++ 4.6.1 (built with summon-arm-toolchain script, 
>> https://github.com/esden/summon-arm-toolchain). Employing FreeRTOS and Eigen 
>> for matrices.
>> 
>> I agree with you, inspecting the asm code for my IIR filter, I found that 
>> currently the compiler is not so "smart", actually sometimes it does not use 
>> the MAC instructions (DSP). I guess it is a matter of time that "cortex-m4" 
>> option will use better this kind of instructions. On the other hand, all 
>> float operation units uses correctly the new hardware instructions.
>> 
>> Héctor.
>> 
>> On Fri, Oct 14, 2011 at 10:03 AM, Piotr Esden-Tempski <address@hidden> wrote:
>> Hi,
>> 
>> On Oct 14, 2011, at 12:34 AM, Prof. Dr.-Ing. Heinrich Warmers wrote:
>> 
>>> Hi all,
>>> i found a first prototype pcb with the new ARM Cortex-M4.
>>> http://www.watterott.com/de/Boards-/-Kits/ARM/Cortex-M4
>>> This processor has a FPU,  168MHz clock, 1Mbyte flash eprom and 198kyte ram.
>>> The price is 14 euro.
>>> I think this processor allow DGPS and IMU fusion and may bee a candidate 
>>> for the future  autopilot hardware.
>> I have this board on my desk. You can get them for free from ST if you are 
>> in the US. As I am working on lisa/m v1.1 l added forward compatibility to 
>> this chip.
>> 
>> The problem I see here is that the toolchains are in very early stages in 
>> supporting this new core, so it will take a while until they are stable 
>> enough to be used on production systems. But I am looking forward to that.
>> 
>> Cheers Esden
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>> 
>> 
>> 
>> -- 
>> Héctor
>> 
>> 
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> 
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