Using RTOS to measure and log data in an external FLASH

[foifsensej]

Does a rtos make sense?

I'm working on a project with a Philips LPC2148 controller (512K FLASH, 32K RAM).

This project is about measuring and log data in an external FLASH. There must a lot of calculation (FFT, etc.) be done and I have to handle 4 Interfaces (SPI0 fast -> Logger and measuring, SP1 slow -> I/O-Modul, UART0 fast -> configuration and read logger by PC, UART1 -> refresh display data on displaycontroller).

Does anyone has experience with rtos on such an application. Does it make sense to use a rtos for this? I'm not sure that I can handle all 4 Interfaces on time, because of the overhead of a rtos. RAM and FLAH should be enough, doesn't it?

Thanks [foif]sensej

 

[foifsensej]

Re: Does a rtos make sense?

It don't has to be a final answer. Give me just an idea. (It's an LPC2138 until LPC2148 is released, of course). Any links?

 

[Kaleem]

Re: Does a rtos make sense?

 

[bobcat1]

Re: Does a rtos make sense?

Hello

RTOS is a good choice ,But you dont have to use it since it's bit complicated

if your processor is fast enough you can use a simple time slicer e.g. use a timer to count every 1 ms

1) write a function to colect & comper the count's - time_out()
2) write a function to sterch the time out
3) Do the process when timeout expires.

All the best

Bobi

 

[thinkey]

Re: Does a rtos make sense?

I think if you spend some time on the RTOS, you will pay less time on application code.
With a RTOS you just assign a priority to each task, and each task will handle a process. You dont need to think too much about timing.