SPRUIZ1B July 2023 – August 2024 TMS320F28P650DH , TMS320F28P650DK , TMS320F28P650SH , TMS320F28P650SK , TMS320F28P659DH-Q1 , TMS320F28P659DK-Q1 , TMS320F28P659SH-Q1
The FSI receiver can continuously receive data and move the data from the receiver buffer with the DMA. A DMA trigger is generated every time a data frame has been received. This is concurrent with the FRAME_DONE signal that sets the RX_EVT_STS.FRAME_DONE flag. To receive continuous data with the DMA, some configurations need to be made on the receiver.
First, set RX_DMA_CTRL.DMA_EVT_EN to 1. This allows the DMA trigger to propagate to the DMA module. The receiver is now able to trigger a DMA event upon the reception of a data frame.
The DMA must also be configured properly for the FSI to receive the data. One way for using the receiver to continuously feed the DMA is:
Unlike the transmitter, there is no requirement to have the DMA channel that is handling the data buffer execute before the DMA channel handling the received tag and user data.