infineon4engi@twitter infineon@linkedin infineon4engineers infineon@youtube
twitter Facebook Linkedin Youtube

+ Reply to Thread
Results 1 to 2 of 2

Thread: How to use 3 SPI bus interface same time with GPDMA

  1. #1
    New Member New Member smarklaw is on a distinguished road
    Join Date
    Apr 2018

    How to use 3 SPI bus interface same time with GPDMA

    I have to communicate with 3 SPI devices in XMC4500 - LQFP144 device using the GPDMA. The problem is the GPDMA0 has 8 channels and I can use 2 channels for one SPI interface and next 2 channels for next SPI interface. But the problem I encounter in the ISR how to clear the EventStatus register. Since there is only one ISR and how to find out which channel to clear. Any one has an example how to use in this kind of scenarios please. I am using XMClib not Dave environment.

    Last edited by smarklaw; Apr 17th, 2018 at 06:56 AM.

  2. #2
    Beginner Beginner
    Infineon Employee
    Infineon Employee
    DRubeša will become famous soon enough
    Join Date
    Jul 2016
    Hi Mark,

    I would suggest you to check default DMA IRQ handler implementation given as XMC_DMA_IRQHandler() function in xmc_dma.c file. There you will find the whole implementation but the idea would be to read the general event status register and then to check the channel event status register. Once you´ve checked the status flag of each channel, you will know which one caused the interrupt at the first place so you can clear the event status for that channel directly. As I said, check the previously mentioned function and it will be clear what can you do by yourself.

    Best regards,
    The views expressed here are my personal opinions, have not been reviewed or authorized by Infineon and do not necessarily represent the views of Infineon.

+ Reply to Thread

Tags for this Thread


All content and materials on this site are provided “as is“. Infineon makes no warranties or representations with regard to this content and these materials of any kind, whether express or implied, including without limitation, warranties or representations of merchantability, fitness for a particular purpose, title and non-infringement of any third party intellectual property right. No license, whether express or implied, is granted by Infineon. Use of the information on this site may require a license from a third party, or a license from Infineon.

Infineon accepts no liability for the content and materials on this site being accurate, complete or up- to-date or for the contents of external links. Infineon distances itself expressly from the contents of the linked pages, over the structure of which Infineon has no control.

Content on this site may contain or be subject to specific guidelines or limitations on use. All postings and use of the content on this site are subject to the Usage Terms of the site; third parties using this content agree to abide by any limitations or guidelines and to comply with the Usage Terms of this site. Infineon reserves the right to make corrections, deletions, modifications, enhancements, improvements and other changes to the content and materials, its products, programs and services at any time or to move or discontinue any content, products, programs, or services without notice.