GPIO configuration for SPI inetrrupt

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GPIO configuration for SPI inetrrupt

Postby Rajasekhar » Thu Jul 19, 2018 5:28 am

Hi,

I am using IMX6qdl-wandboard-redvd1 board. I have configured MISO, MOSI, CLK, CS0 in device tree IMX6qdl-wandboard-redvd1.dtsi file.

I am able to get the SPI init success. Then i am configuring the GPIO1_24 pin for SPI interrupt as like this in my deriver code.

#define IMX_SPI_INTERRUPT 24

and parsing this as parameter in my 'spi_irq' function and then trying to test this PIO pin (GPIO1_24, pin number 10 in JP4) by toggling it to 5v and ground, but i am not getting any interrupt coming to irq callback.

Can you please some tell us the way i have configured GPIO is correct or not ?
Do i need to configure it in device tree(I did not do)?
Do i need to expose it to user space (/sys/class/gpio/export)?

Please suggest me how to configure the GPIO and how to check it.

Regards,
Rajasekhar
Rajasekhar
 
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Re: GPIO configuration for SPI inetrrupt

Postby kadencemarvin » Thu Oct 18, 2018 6:12 am

The usual downside with SPI slave is that as presently because the master has sent the "send Maine thusmething" command computer memory unit he rapidly then sends the "clock out the requested data" computer memory unit with so very little gap that your slave does not have time to induce the response computer memory unit prepared for it. write my essay - australianssay.com. Thus deceleration this down more by exploitation interrupts then calls to functions to access ring buffers could solely exacerbate the matter.
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