About dz huang

dz huang · 2018-05-31

Posted on May 31, 2018 at 11:19My current project using STM32L071RB chip, and now encounter a strange issue, when I enable PWR_CR ULP bit thr 'HAL_PWREx_EnableUltraLowPower()', the systick (Using TIM2 as timebase) become slow. and if I disable ULP b...

dz huang · 2018-04-23

Posted on April 23, 2018 at 18:00Hello, I'm using STM32L071RBT6 MCU, encounter a strange issue. when MCU power on, using ADC channel 0 to monitor external battery voltage, the result is OK. but once system waked up from STOP mode, ADC converter be...

dz huang · 2018-06-01

Posted on June 01, 2018 at 10:14this issue fixed by clear LPSDSR bit after wakeup from STOP mode.

dz huang · 2018-06-01

Posted on June 01, 2018 at 10:12My issue fixed by clear LPSDSR bit in PWR->CR after wakup from STOP mode. you can tryCLEAR_BIT(PWR->CR, (PWR_CR_PDDS | PWR_CR_LPSDSR));

dz huang · 2018-05-30

Posted on May 31, 2018 at 08:56I using STM32L071RBT6, encounter similar issues, when I set ULP bit by 'HAL_PWREx_EnableUltraLowPower()', the systemtick (using TIM2 as time base) become very slow. when I clear ULP bit by 'HAL_PWREx_DisableUltraLowPow...

dz huang · 2018-05-02

Posted on May 02, 2018 at 10:13thanks all of person's help, finially, I found the fix. if I enable ultra low power mode, this issue disappeared, although I don't understand the real reason.HAL_PWREx_EnableUltraLowPower();

dz huang · 2018-04-29

Posted on April 29, 2018 at 08:44I have print all ADC and DMA register before and after wakeup, no any finding. following is the output of ADC & DMA register values comparation before and after waekup from stop. I am suspecting whether this is a ST...

User statistics

User Activity

TIMx become slow when enable ULP (STM32L071RB)

ADC behavior abnormal after wake up from STOP mode

Re: TIMx become slow when enable ULP (STM32L071RB)

Re: Reset ULP bit after stop (STM32L1)

Re: Reset ULP bit after stop (STM32L1)

Re: ADC behavior abnormal after wake up from STOP mode

Re: ADC behavior abnormal after wake up from STOP mode