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DMA for SPI transfer on LS1021A

Question asked by Thomas Tamandl on Feb 9, 2016
Latest reply on Feb 10, 2016 by Serguei Podiatchev

Hi,

 

on my board there is a 512kBit FRAM connected to the SPI interface. The interface is configured to spi-max-frequency = 40MHz ( which results in a clock frequency of about 36 MHz). But writing 512kBit lasts ~0.6 or ~1.2s depending on eoq- or tcfq-irq-mode, which is too long for my application. It seems IRQ based transfer is not fast enough. Is there the possibility to configure DMA for SPI transfer?

 

Best regards

Thomas

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