About noobmaster69

noobmaster69 · 2022-07-27

I am using STM32L031 for my project and since it is battery operated, I am planning to use Low Power Sleep mode for the same. And for that, I need clock below MSI range 1. So I chose to switch to 65kHz clock. But it gets stuck somewhere during clock ...

noobmaster69 · 2022-07-17

Hi. I am using STM23L031 for a battery operated product. The expected life cycle is almost 1 year so I need to save battery as much as possible. So I wanted to use Low power sleep mode when not doing anything(I chose this because I need DMA for UART ...

noobmaster69 · 2022-07-04

Below is the code of Sequencer function to register task.void UTIL_SEQ_RegTask(UTIL_SEQ_bm_t TaskId_bm, uint32_t Flags, void (*Task)( void )) { UTIL_SEQ_ENTER_CRITICAL_SECTION(); TaskCb[SEQ_BitPosition(TaskId_bm)] = Task; UTIL_SEQ_EXIT_CRIT...

noobmaster69 · 2022-07-04

Hi. I am working on a battery operated project using STM32L031 microcontroller. I am using 32 MHz clock for normal operation. But if I use same clock in low power mode then it consumes current of about 2.7mA. But for higher battery life, current cons...

noobmaster69 · 2022-06-07

I know controllers push data to stack, PC to LR, etc. but how does this happens? Is it through software or hardware?If through software then where is the code which does this? and where does it come from? is it the compiler which adds it?If it is thr...

noobmaster69 · 2022-08-05

Hi @JHOUD ,What you said makes sense but I tried following example code(attached main.c file) from ST. This also resets the controller.(I just added IWDG and LED to indicate if controller resets)It doesnt even use PLL.Regards,noobmaster69

noobmaster69 · 2022-07-16

Also I wanted to know how to disable and enable systick when entering and exiting low power mode.Should I suspend systick before changing the clock frequency when entering low power mode or should I suspend it after clock configuration?Also, when exi...

noobmaster69 · 2022-07-05

Thanks for your reply. Much appriciated. Will try to implement what you said. Regards,noobmaster69

noobmaster69 · 2022-07-05

Hi @Aime ,Thanks for your reply. I am planning to use Low power Sleep mode. Because in this mode DMA is active which is required for USART. In low power mode, I need only USART active. It wakes up from lwo power mode when I receive data. It ccan als...

noobmaster69 · 2022-07-04

Okay thanks for the reply. Will check that.Regards,noobmaster69

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Controller resets when switching clock from 32MHz to 65kHz

Hitting Hardfault while switching clock from 131KHz to 32MHz. I am using STM32L031 controller.

How are interrupts handled when program execution is in critical region?

How to drop clock frequency when entering low power mode and then increase when exiting low power mode?

How does microcontrollers store data of current execution before servicing the interrupts?

Re: Controller resets when switching clock from 32MHz to 65kHz

Re: How to drop clock frequency when entering low power mode and then increase when exiting low power mode?

Re: How to drop clock frequency when entering low power mode and then increase when exiting low power mode?

Re: How to drop clock frequency when entering low power mode and then increase when exiting low power mode?

Re: How are interrupts handled when program execution is in critical region?