VN25 – Stm32F4 Usart Polling and Interrupt ( Transmit + Receive )

VN25 (Video No:25) This video includes, (Hal lib V2.11.0) while programming STM32F4 with STM32CubeMX – Keil, How to receive and transmit data by using Usart serial polling ve interrupt methods? What is oversampling value?

Notes;

• There are no both RxCpltCallback and  TxCpltCallback functions in Usart polling method.
• Usart interrupt method has both RxCpltCallback and  TxCpltCallback functions.
• Oversampling value is either 8 or 16.
• Min. baud rate = Usart clock freq. / 65535
• Max. baud rate = Usart clock freq. / Sampling rate
• If oversampling value is selected as 16, receiver tolerance is higher and the speed is lower than 8.
• Receiver tolerance should be higher than the deflection of total clock system in terms of that Usart asynchronous runs better.