SPI RX OVERRUN ISSUE

balajiravipati — Wed, 02 Aug 2017 10:44:36 GMT

Hi Team,

We are using LPC54102 controller in our design. SPI1 of the controller is interfaced with Ambarella processor which acts as a SPI Master. In LPC54102 controller we are using DMA to transmit and receive data over SPI. When the SPI clk frequency is increased beyond 5MHz we are getting SPI1 RX OVERRUN error. For both the SPI1 DMA channels priority is set to highest(0). If we keep the RX priority low then more RX OVERRUNS happening and when TX priority is low, TX UNDERRUNS are happening.

Re: SPI RX OVERRUN ISSUE

jeremyzhou — Fri, 04 Aug 2017 02:47:02 GMT

Hi balaji ravipati,

Thank you for your interest in NXP Semiconductor products and

the opportunity to serve you.

I was wondering if you can share the more information.

1) Whether the issues happens when the SPI clk frequency get the more slower.

2) Would you mind introduce the data frame of the receiving and transferring of the application.

Have a great day,

TIC

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LPC MicrocontrollersのトピックSPI RX OVERRUN ISSUE

SPI RX OVERRUN ISSUE

Re: SPI RX OVERRUN ISSUE