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Support for multiple timers on Potenta H7 #323

Closed prugit1 closed 3 years ago

prugit1 commented 3 years ago

Like TIM_Typedef *TIMx refers to the hardware timer number (i.e TIM1, TIM2, ..... TIM24)

What does TIM_HandleTypedef *htim refer to in the below command?

HAL_TIM_IRQHandler(TIM_HandleTypeDef *htim)

(PS: I am trying to control built-in LEDs at different frequencies using Timer Interrupt)

khoih-prog commented 3 years ago

You can try and use this new Portenta_H7_TimerInterrupt Library

Features

This library enables you to use Interrupt from Hardware Timers on an STM32H7-based Portenta_H7 board.

As Hardware Timers are rare, and very precious assets of any board, this library now enables you to use up to 16 ISR-based Timers, while consuming only 1 Hardware Timer. Timers' interval is very long (ulong millisecs).

Now with these new 16 ISR-based timers, the maximum interval is practically unlimited (limited only by unsigned long miliseconds) while the accuracy is nearly perfect compared to software timers.

The most important feature is they're ISR-based timers. Therefore, their executions are not blocked by bad-behaving functions / tasks. This important feature is absolutely necessary for mission-critical tasks.

prugit1 commented 3 years ago

@khoih-prog Thank you for your reply.

I could not find this library in the library manager. I would like to know when it will be available.

Also, does this library supports to use of more than 1 timer?

khoih-prog commented 3 years ago

It'll be listed within several hours as it's totally brand-new. You can download it directly via GitHub at Portenta_H7_TimerInterrupt.

The library can support many timers, check Available Timers for Portenta_H7, such as

TIM1, TIM4, TIM7, TIM8, TIM12, TIM13, TIM14, TIM15, TIM16, TIM17

also try this example Argument_None using 3 Timers simultaneously.

khoih-prog commented 3 years ago

The delay happens because of [Incident] issues with Library Manager indexer infrastructure #483

prugit1 commented 3 years ago

@khoih-prog Thank you for your reply.

I have tested your example codes and all are working fine with Portenta H7. The example titled "Argument_None" pretty well satisfies my requirement.

But, I am still curious to know, What does TIM_HandleTypedef *htim refer to in the below command?

HAL_TIM_IRQHandler(TIM_HandleTypeDef *htim)