Hi,
Dunno if this has been answered before...
I'm working on a LPSPI driver using eDMA configured as a slave for the RT1170 family of processors. using the SDK version 2.11.1
- Using call to LPSPI_SlaveTransferEDMA function for transfer
- Slave eDMA configured with transfer data size of: 64 bytes
Scenario:
- b2b configuration.
- Slave waiting for 64 bytes of data using LPSPI_SlaveTransferEDMA
- kLPSPI_PcsActiveLow
- Master sending only 27bytes using normal SPI transfer pulling PCS high when finished
- When master have completed it's 27 bytes it sets PCS high
Problem:
- When the master is finished sending its 27bytes and PCS is high again. I want the eDMA to finish on the PCS going high and then calling the callback function.
- It seems like the eDMA is waiting for the complete set of 64bytes before returning from the transfer and calling the callback function.
Question:
- Is it possible to get it the eDMA to finish at the 27bytes and calling the callback function?
Br
/Fredrik
