Bug in startup_stm32f427_437xx.s file from STM32F4xx_DSP_StdPeriph_Lib_V1.4.0?

[sima2]

Posted on March 24, 2015 at 16:34

When I look in my startup_stm32f427_437xx.s file. It says:

  .syntax unified  .cpu cortex-m3  .fpu softvfp  .thumbShould it say .cpu cortex-m4?

[Tesla DeLorean]

Posted on March 24, 2015 at 17:36

Probably better it doesn't, it prevents the output of M4 instructions, especially FPU ones, prior to the FPU being enabled.

[sima2]

Posted on March 25, 2015 at 17:00

It looks like ''softvfp'' will take care of not using FPU instructions.

[Tesla DeLorean]

Posted on March 25, 2015 at 17:18

Does the file assemble, link, and work? Yes

Will you get an error if you put some very specific assembler functions in the startup.s file? Yes Is this a problem? Probably not, because if you're putting stuff in the startup file you will be sufficiently conscious of what you're doing, when, and what error(s) this will throw, and can change the processor setting.