Stm32 driver naze how to#
How to reset huart->RxState to HAL_UART_STATE_READY: If you manually implement your own interrupt-based and ring-buffer-based UART Tx and Rx calls, however, which is the preferred way to do it, this member is completely meaningless and it doesn't matter what you do with it, as it is used only inside HAL library function calls and HAL ISR handlers (neither of which you have to use), and really has nothing to do with the register-level interrupts and things directly.īy digging around the source code in stm32f4xx_hal_uart.c (for example), however, here are a couple valid options you can use: 1. The huart->RxState member of a uart handle struct is really only used internally by the HAL library when doing things such as HAL_UART_Receive(), HAL_UART_Receive_IT(), HAL_UART_Receive_DMA(), (and many other internal functions like this), etc. (See it's usage in " stm32f4xx_hal_uart.c", for example.) How reset the state of the UART interrupt if wish to disable a Rx interrupt after some time I could use USART_ClearITPendingBit() or USART_ITConfig() but these are defined as private functions by STM's HAL library. Disabling interrupt in interrupt handler STM32F407.
Stack Overflow questions do not address how to reset the state I have referred to these questions: How do I reset the state of the UART interrupt if I wish to disable a Rx interrupt after some time? This will prevent it from raising an interrupt, but the state set by the function HAL_UART_Receive_IT which is HAL_UART_STATE_BUSY_RX needs to be set back to HAL_UART_STATE_READY for the uart handle to go back to a state that can accept a new HAL_UART_Receive_IT() call. We can disable the UART interrupt using HAL_NVIC_DisableIRQ() (ex: HAL_NVIC_DisableIRQ(USART1_IRQn)). But once started how does one stop it, "manually"?.I know one can enable a UART receive interrupt using HAL_UART_Receive_IT(&huart2, (uint8_t *)rx_buffer, expectedNumberOfBytes)
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