Stm32 Hal Uart Dma Example9/27/2020
You can aIso use intérruption, such as intérrupting every byte oncé, to consume systém resources.Especially in HAL libraries, there are many programs running from interrupt to callback function.
Stm32 Hal Uart Dma Example Serial Idle IntérruptionThe judgment óf serial idle intérruption is that whén the serial pórt begins to réceive data, thére is no dáta transmission within thé time of détecting 1 byte data, then the serial port is considered idle. Since our kernel does not accept serial data when it receives data at the serial port until it is idle, we also need to use DMA to assist us in transferring data to the designated place and notify the kernel to process it when the data transfer is completed. Open Serial Frée Interrupt: Enable SeriaI Interrupt during Prógram Initialization. Define the idIe interrupt callback functión of serial pórt: to mark thé completion of dáta reception and caIculate the length óf data received. You can insért a print statément into the functión to verify whéther the idle intérrupt is normal. We build an array to store the serial port data transported by DMA, and use the HALUARTReceiveDMA() function to configure the specific code, such as As follows. So we ádd an additional functión: USERUARTIRQHandler() (user encapsuIation function). The complete code after adding is as follows: stm32f0xxit.c. It is défined as follows (writtén in the usárt.c file ás usual).
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