About HDaji.1

HDaji.1 · 2024-04-22

Hi,I have a PCB with F411 as MCU.MCU VBAT pin is directly connected to battery positive pin.I try to use ADC1 to read the VBAT value. Here is the ADC1 init code: ADC_ChannelConfTypeDef sConfig = {0}; /* USER CODE BEGIN ADC1_Init 1 */ /* USER ...

HDaji.1 · 2024-02-20

In my app, I need MCU to go to stop mode and then wake up by RTC timer. I follow this RTC wake up example and manage to make MCU go to stop mode for a few seconds and then wake up. Because in my app, we want MCU to wake up once in a few hours instead...

HDaji.1 · 2024-02-04

I am using F411 as the main controller of some DAC/ADC modules.I need to put MCU in stop mode to reduce its power consumption.I wonder whether or not I need to configure all the I2C, SPI, and UART interfaces when MCU wakes up from stop mode.

HDaji.1 · 2024-01-24

In my project, my MCU (F411) uses I2C HAL API routinely to read from a sensor device.When some event happens, my interrupt handler will use I2C API to read from different register from that device; so my question is:Is HAL API thread safe? Although I...

HDaji.1 · 2023-12-26

I tried to use ADC in F411 to read two ADC inputs.My hardware is a F411-Nucleo board; my IDE is CubeIDE.The followings are my ADC settings in IDE: I use 2 channels in ADC1 (IN1, IN4)I also use DMA to obtain ADC results...

HDaji.1 · 2024-05-08

I tried the DWT method in my code. It basically works.However, I have 2 issues:The delay time is not so accurate; and does not go linear with input value.I wonder if it's OK to call DWT_Delay_Init(void) multiple times.

HDaji.1 · 2024-04-22

yes, you're right. @AScha.3 Once sampling time is changed to maximum: for F411, it's 480 cycles.The reading becomes accurately close to measured value.

HDaji.1 · 2024-04-22

Forgot the add the DMA for ADC1 code: /* DMA controller clock enable */ __HAL_RCC_DMA2_CLK_ENABLE(); /* DMA interrupt init */ /* DMA2_Stream0_IRQn interrupt configuration */ HAL_NVIC_SetPriority(DMA2_Stream0_IRQn, 0, 0); HAL_NVIC_EnableIR...

HDaji.1 · 2024-02-21

Hi @Peter BENSCH Two more questions:Using pre-scaler of 16, we can get 2kHz. I wonder how I can get 1Hz? the options for pre-scaler are only 16, 8, 4, and 2.Is the wake-up timer a signed variable? Otherwise the max values should be 65535, isn't it?.

HDaji.1 · 2024-02-21

Hi @Peter BENSCH Below are my code. I bet you have solved my problem. Let me give it a try and then Accept it. Many thanks!static void MX_RTC_Init(void) { /* USER CODE BEGIN RTC_Init 0 */ /* USER CODE END RTC_Init 0 */ RTC_TimeTypeDef sTime...

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F411 ADC1 VBAT Reading Too High

RTC wake up time counter limit

MCU State changed or unchanged when waking up from stop mode

Is I2C HAL library for F4 series thread safe?

F411 Nucleo Board ADC Issues

Re: STM32L462 delay in a microsecond(us)

Re: F411 ADC1 VBAT Reading Too High

Re: F411 ADC1 VBAT Reading Too High

Re: RTC wake up time counter limit

Re: RTC wake up time counter limit