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Does STM32F072 support ARM instructions? Default setup is for THUMB. Keil compiler says ARM is invalid

cthomas
Associate

‎2018-07-01 08:27 AM

Posted on July 01, 2018 at 17:27

Changed THUMB to ARM in startup_stm32f72bs.s, get the following message from build:

..\Stm\startup_stm32f072xb.s(153): error: A1356E: Instruction not supported on targeted CPU

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Tesla DeLorean
Guru

‎2018-07-01 08:37 AM

Posted on July 01, 2018 at 17:37

None of the Cortex-M parts support 32-bit ARM Instructions

The Cortex-M0 supports a shrinking set of 16-bit Thumb Instructions, which means you might need to use a couple instructions to perform an operation where one instruction on a CM3 or CM4 would suffice.

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