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What is the least CPU intensive way to access the I2C bus?

I have tried using the HAL_I2C_Master_Transmit_DMA and HAL_I2C_Master_Receive_DMA functions to access an external I2C slave but I find that this takes a fair amount of processing time. I am using a STM32L476R M4 core device. Using a GPIO I measure th...

BCrow.1 by Associate II
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I2C seems blocked when restarting Debug session

Hi,I have some troubles with my Nucleo STM32F446RE communicating with my MPU6050 IMU over I2C. When powering everything the first time and debug it, it works fine. However, when restarting with exactly the same code, the board fails to start the I2C...

YGail.1 by Associate
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  • 2 replies
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External Watchdog/BOD circuit for STM32F1/F4 series

Hello,We are designing automotive devices (Trackets,Meters etc) and almost in all of our devices we use external watchdog with integrated BOD function.We faced issues in the past during EMC/ESD tests, where the microcontroller's (AVR) BOD or watchdog...

SProg by Associate III
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RTC on B-L475E-IOT01A.

At evening I set time 18-38-00, got it back, it was OK and left it to run. At morning I see the time 32-59-48. My set-get functionsint RTC_SetTime(uint8_t hours, uint8_t minutes, uint8_t seconds) { if (hours < 24 && minutes < 60 && seconds < ...

Dear all, I am working on FDCAN with STM32G473 and I do not understand the example calculation of the Baudrate in chapter 43.4.7 in the following document RM0440 Rev 2 (en.DM00355726.pdf)

bit time = [NTSEG1 + NTSEG2 + 3] tqAnd in the note With a CAN kernel clock of 48 MHz, the reset value of 0x06000A03 configures the FDCANfor a bit rate of 171 kbit/s.NSJW = 6NBRP = 0 => 1NTSEG1 = 10NTSEG2 = 3How do you get 171 kbit/s by 48 MHzBest Reg...

HUnso.1 by Associate
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Which communication should I use if I want to transmit 2.6 MSPS sampled signal to PC using STM32H743ZI ?

Hi I am currently developing a radar backend system wherein I need to pass ADC sampled data at 2.6 MSPS to PC for post processing. I am stuck to which communication type will be optimal for transmiting such data from STM32H743ZI to PC.

NKarn.1 by Associate II
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  • 1 kudos