Re: [Paparazzi-devel] Suggestions

[Alexandre Bustico]

Le 13/12/2013 12:37, Prof. Dr.-Ing. Heinrich Warmers a écrit :
> It seems that other groups  (ETH)  use also this RT-OS and leave 
> (ChibiOS).
> I don't know why they change from ChibiOS to nuttx RT-OS.

there is pro and cons for both theses two great rtos.

nuttx pro :
° has a posix api : those who come from unix land will fell familiar 
with the api, it's also easier to port unix tool to nuttx

nuttx cons:
° target high end mcu, has a large footprint and use more resources.

chibios pro :
° low overhead, low footprint, static declaration of resources used

chibios cons:
° specific api, slow learning curve because of a difficult to understand 
documentation

> Perhaps there is more middle ware for free  (FAT, USB-host, SD,CAN, 
> Ether net) etc.

chibios come with a nearly complete hardware library abstraction layer, 
(only misses some  things like slave implementation for
i2c ans spi buses), it already come with fatfs, lwip, sd support above 
spi and sdio, etc etc.

--
Alexandre