Software description

AN4457

14/24

DocID026046 Rev 1

2.3

Reception

2.3.1

Frame reception

Figure 7 describes the implementation of the function that receives a given number of bytes

via DMA and timer.

RxXferCount: is a counter that is incremented after the completion each DMA transfer.

FirstBuffer_Rx and SecondBuffer_Rx: the DMA destination address switches between

two buffers addresses. The first buffer is used by DMA as data transfer destination, while

the second buffer is used by the CPU to format data.

Figure 7. Frame reception routine flowchart