He

gouthamdugyala — Thu, 20 Jul 2017 05:43:47 GMT

Hi,

I'm using LPC5410x NXP controller, we are implementing SPI FIFO-DMA full duplex mode. As of now we understand that SPI Tx register has 32-bit register(16-bit for control/16-bit for DATA) whereas SPI Rx register 32-bit register dedicated to DATA.

To work in full duplex mode, i configured the control register for MasterTx and its working fine. should i configure the same to SlaveTx??

Whether configure or not we are missing few bytes initially and duplication happening at end.

Please suggest how to handle SlaveTx data

Chethan

Re: He

jeremyzhou — Mon, 07 Aug 2017 06:54:55 GMT

Hi goutham dugyala,

Thank you for your interest in NXP Semiconductor products and

the opportunity to serve you.

I'd highly recommend you to refer to the dma_transfer demo from the SDK of the LPC54102, this demo illustrates how to use spi driver with DMA and you can create the SDK via the link below.

Welcome to MCUXpresso | MCUXpresso Config Tools

Have a great day,

TIC

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