DMA SPI Slave receive

1820533359 — Tue, 27 Oct 2020 08:49:52 GMT

So I have a driver for the ssp in LPC3250 that is similar to the driver offer by the nxp and it works perfectly using interrupts to send and receive data, right now I'm having this issue when i try to use the dma do handle the writing and copying of the data from the ssp registers. I have already set the ssp as a slave and configured the dma controller and ssp controller. But when I ran the demo, the interrupt is triggered while the data in the data register fifo didn't transfer to the destination buffer. (in addition,i guess that there may be some problems in my dma configuration.But the dma ssp master sending is successed,so i didnt know where is wrong in the dma.) I hope that someone who have used the same series can give some suggestions or similar demo

LPC MicrocontrollersのトピックDMA SPI Slave receive

DMA SPI Slave receive