Re: [Paparazzi-devel] ARM Cortex-M4

[Piotr Esden-Tempski]

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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