HAL_Delay() function always last 1 ms more

[sergetr]

Posted on October 19, 2017 at 14:11

I'm using the latest build of CubeMX with a F429 Disco kit. If I use HAL_Delay(1) it last 2 ms, HAL_Delay(5) last 6 ms to get 1ms HAL_Delay(0) must be used.

This is a major bug that should be fix ASAP!

[Tesla DeLorean]

Posted on October 19, 2017 at 15:01

Don't rely on these routines for precision timing, the granularity is already poor, try a time base that clocks 10x the resolution you want. Consider using DWT_CYCCNT, that has ~5ns granularity, and might deliver +/-20ns accuracy.

>>

This is a major bug that should be fix ASAP!

No, you're using a function that's inappropriate for your application.

[waclawek.jan]

Posted on October 19, 2017 at 15:27

Loopdelays are usually meant as 'delay at least as much as the argument says'.

The documentation should clearly state this - did you check it?

JW