About JimYuill

JimYuill · 2023-03-25

I'm writing a book about using FreeRTOS on an ST MCU.I'd like to use excerpts from the MCU reference-manual in the book, including figures.Surprisingly, the MCU reference-manual does not have an ST copyright.Are there any limitations or restrictions ...

JimYuill · 2022-09-02

There appears to be a minor bug in HAL_TIM_IRQHandler(), in stm32f7xx_hal_tim.chttps://github.com/STMicroelectronics/STM32CubeF7/blob/master/Drivers/STM32F7xx_HAL_Driver/Src/stm32f7xx_hal_tim.cAPPARENT-BUG SUMMARY:There's a line-of-code that works, b...

JimYuill · 2021-12-21

An STM tutorial on timers has errors regarding PWM mode, for STM32.The tutorial is: "STM32L4 - Timers : Advanced-control, general-purpose, and basic timers"It is a slide-set, with notes. There are at least a couple versions of it, e.g., a version for...

JimYuill · 2023-09-28

A work-around is to tell STM32CubeIDE to not generate the main() function in main.c.When FreeRTOS is installed via the IDE, the IDE generates a main() with calls to CMSIS-RTOS functions, to start the FreeRTOS scheduler and a task.If the calls to CMSI...

JimYuill · 2023-01-03

PavelA., great info, thanks.The post you linked-to mentions that the gcc docs for "packed" have different sections for "variable attributes" and "type attributes".I realized that in my post, I misquoted the gcc docs. In quoting the current gcc docs, ...

JimYuill · 2023-01-02

UPDATE 1/3/22: I had misquoted the gcc docs. That's now fixed (changed text is bold).I've run into the same problem, in stm32f7xx_ll_usb.c.I don't have answers, but some additional clues about the problem.I don't know where that particular file came ...

JimYuill · 2022-09-05

Thanks for the background info.I'm new to HAL, but this still seems like a bug.It's elementary programming practice for variable names to accurately reflect the variable's contents and use. That's not being done in this case.The HAL functions have ha...

JimYuill · 2022-09-02

Thanks for the info. However, that doesn't seem to explain this:TIM_IT_UPDATE is defined as TIM_DIER_UIEThis call, below, sets the SR register, and its UIF bit.It doesn't set the the DIER register and its UIE bit.__HAL_TIM_CLEAR_IT(htim, TIM_IT_UPDAT...

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Copyright for ST manuals, and reprinting excerpts

Apparent minor bug in HAL_TIM_IRQHandler()

An STM tutorial on timers has errors regarding PWM mode, for STM32 MCUs

Re: Is there a way to disable the automatic default task creation in CubeMx ?

Re: The mysterious __packed uint32_t in USB_ReadPacket and USB_WritePacket

Re: The mysterious __packed uint32_t in USB_ReadPacket and USB_WritePacket

Re: Apparent minor bug in HAL_TIM_IRQHandler()

Re: Apparent minor bug in HAL_TIM_IRQHandler()