Hi:
I have too many uart data to receive, and the frame length is not sure, and I do not want so many uart interrupt, so I want use DMA, but the dam generally should give the numbers of received data，i get some idears which is uesd in stm32.
Roughly follow the following steps:
step1: enbale the uart dma receive
step2: set the dma receive buffer data number with a larger number than your send,and the dma will store the data to buffer without stop
step3: once you complete a frame data,the bus is idle,it will be trigger the idle interrupt
step4: in the uart idle interrupt handler functions,you can calculate how many bytes you have received
step5: deal with the received data,and clean the flags,than received the next frames
I have some problems about this resolves:
1. if the method above is suitable for s32k14x too?
2. i cant find the idle interrupt in the mapping,how i can create a idle interrupt and do some logical processing in the IRQHandler functions?
3. how can I get the dma store buffer data number when the idle interrupt is triggered?
4.is there example about the uart + idle interrupt + dma ?
thank you for your reply。
