Cortex-M3 support?

Gene Smith gds at
Mon Mar 1 19:59:06 UTC 2010

xu ray wrote:
> You can refer to make/custom/rtl22xx_t.cfg and rtl22xx_t BSP. This is a 
> Thumb BSP. Try the "-mcpu=cortex-m3 -mthumb" flag for cortext-m3. I 
> think no one have ever tried the cortex-m3 flag with rtems tool chain 
> yet, hoping it works for you. Btw, minimum code size for rtl22xx_t is 
> about 16K with 2K .bss/.data space, and the binary removed the  
> filesystem and libc overhead. What is your requirement for RAM and ROM 
> space?

Using a very small cortex-m3 now. 64k flash, 10k ram. Sounds interesting 
if I can get the app to fit. :)

For fun, built my current project (no rtos) with rtems chain and it 
built. Don't remember if I tried to run it.


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