Tagged: asynchronous

STM32 tutorial: Efficiently receive UART data using DMA 22

STM32 tutorial: Efficiently receive UART data using DMA

STM32 + UART + DMA RX + unknown length This repository may give you information about how to read data on UART by using DMA when number of bytes to receive is not known in advance. In STM32 microcontroller family, U(S)ART reception can work in different modes: Polling mode (no DMA, no IRQ): Application must poll for status bits to check if new character has been received and read it fast enough in order to get all bytes PROS Very...

Library 19- Use internal RTC on STM32F4 97

Library 19- Use internal RTC on STM32F4

It’s been some time when I post last library. Next one is internal RTC library. STM32F4xx devices have Real Time Clock (RTC) inside, with support of internal calibrated 32768 Hz oscillator or external (more accurate) 32768 Hz oscillator. RTC peripheral has also backup register support, which means that when you reset MCU, registers are not reset or if power is off and you have battery connected on Vbat pin, clock is still working. RTC can also wakeup MCU from all...