STM32 MCUs Products

Timer Call back question ?

Dear Members,I have a callback :void Timer10_Callback() { seconds += 1;   if (seconds == 30) { minute = 1; seconds = 0; rpm=count; rps=(float)rpm/30; count=0; } }and main() inside while()current_rps = rps; i...

Activate LPUART1 on STM32L4 only when required

Hello, Please suggest a Software solution where I can power on the entire LPUART1 peripheral on STM32L4 only when I want. Any data received on the UART lines before I power on the LPUART1 must in no way be accessible to the MCU Hello,  I have an issu...

STM32L073 adc polling async clock ?

hello, i am using the STM32L073 for adc reading. And want to use the async clocks for the dc voltage reading. so i dont need a high speed clock.The problem is when i tested the async clocks on adc , the measurement time was sometimes(30~40%) differen...

when SRAM & TFT connected to FSMC, One of them doesn't work properly

Hello,My board includes SRAM, TFT (5.0 inch with ssd1963), NOR, NAND circuits.When TFT is not connected, SRAM passes all tests (all memory read/write).(I didn't test NOR or NAND)if TFT is connected, Sram test fails any address. (Or TFT doesn't work...

Zero crossing interrupt timer implementation

I am working on creating a reverse phase dimmer where the on/off timing for the 120/240 VAC sine wave is handled by an STM32L051C8Tx MCU. There is a separate analog circuit that generates a 3V3 pulse at every zero crossing and I take this as an input...

The RS485 interface of MCU stm32F373 does not work if I select the parity on none however the same software works on stm32L4RCC

I am reading the AN4776, General-purpose timer cookbook. At the 9th page, it mentioned the repetition counter is null. What does a register is null really mean？？

How do you configure UART DMA Receive on STM32F767ZI Nucleo and STM32H743ZI Nucleo?

I've been trying to setup the DMA on UART Receive on both the STM32H7 and F7 nucleo boards however I can't seem to get it to work. I can get the DMA on transmit to work fine but whenever i send anything to the board, either by hard wiring UART2 TX to...