STM32F3 Motor Timer Idle Setting / MOE Bit HAL Problems

[hemogloben]

Posted on March 09, 2017 at 17:00

I'm currently working on a Motor Controller using the STM32F3. I need the ability to start and stop the motors and, in particular, the ability to switch from moving to stopped and free-wheeling. It would seem that the OCIdleState and OCNIdleState in TIM_OC_InitTypeDef are what I'd want to use to set these states (obviously with OSSI bit set) whenever I'm Idle, but I was having trouble getting it to work.

Long story short, I found that __HAL_TIM_MOE_DISABLE is defined so that it will only clear the MOE bit if both CCxE and CCxNE are 0'd.

#define __HAL_TIM_MOE_DISABLE(__HANDLE__) \
 do { \
 if (((__HANDLE__)->Instance->CCER & TIM_CCER_CCxE_MASK) == 0) \
 { \
 if(((__HANDLE__)->Instance->CCER & TIM_CCER_CCxNE_MASK) == 0) \
 { \
 (__HANDLE__)->Instance->BDTR &= ~(TIM_BDTR_MOE); \
 } \
 } \
 } while(0)�?�?�?�?�?�?�?�?�?�?�?�?�?�?�?�?�?�?�?�?

Unless I'm missing something,

http://www.st.com/content/ccc/resource/technical/document/reference_manual/4a/19/6e/18/9d/92/43/32/DM000435pdf/files/DM000435pdf/jcr:content/translations/en.DM000435pdf#page=585

shows why this defeats the purpose of the MOE bit and Idle Settings... (With CCxE and CCxNE set to 0 the states of the pins are controlled by GPIO controller instead of timer).

Is this a bug? Are there other HAL Functions that I should be using instead?

EDIT: Semi-relatedly, is there a way, in hw, to have the BRK input be able to disable the MOE bit but not re-enable it?

[Amel NASRI · Accepted solution]

Posted on March 09, 2017 at 18:15

Hi

Artes.Benjamin

‌,

In the version 1.7.0 of the

http://www.st.com/content/st_com/en/products/embedded-software/mcus-embedded-software/stm32-embedded-software/stm32cube-embedded-software/stm32cubef3.html

package, a new macro called '__HAL_TIM_MOE_DISABLE_UNCONDITIONALLY' is added to answer requests like yours.

If you need more details about timers programming and specially the break feature, I recommend you the following resources:

• http://www.st.com/content/ccc/resource/technical/document/application_note/group0/91/01/84/3f/7c/67/41/3f/DM00236305/files/DM00236pdf/jcr:content/translations/en.DM00236pdf

  : General-purpose timer cookbook

• http://www.st.com/content/ccc/resource/technical/document/application_note/1a/d5/a5/cd/98/4e/47/76/DM000804pdf/files/DM000804pdf/jcr:content/translations/en.DM000804pdf

  :Using STM32 device PWM shut-down featuresfor motor control and digital power conversion

-Amel

[hemogloben]

Posted on March 09, 2017 at 19:39

Thanks for the reply.  I see 1.7.0 on the STM32CubeF3 page, but don't see it in STM32CubeMX.  Which is preferred?

[Amel NASRI]

Posted on March 10, 2017 at 10:38

The version 1.7.0 of STM32CubeF3 is supported in the last CubeMX version (4.20).

So you have to install this version first.

-Amel