STM32 and IAR Compiler doubt [SOLVED]

[tiago]

Posted on April 30, 2010 at 16:40

STM32 and IAR Compiler doubt [SOLVED]

#arm-thumb-stm32-cortex-m3

[Tesla DeLorean]

Posted on May 17, 2011 at 13:49

The low bit of the PC must be set to 1 to indicate the function is in Thumb, the STM32 (Cortex-M3) doesn't support ARM which would have the bit set to 0.

[disirio2]

Posted on May 17, 2011 at 13:49

It is because the STM32 runs thumb code so the least significant bit of a code address must be 1. Trying to jump to an even address would raise an exception because the Cortex-M3 cannot run ARM code.

Giovanni

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ChibiOS/RT http://chibios.sourceforge.net

[tiago]

Posted on May 17, 2011 at 13:49

Thanks a lot guys!