Hello. I’m currently writing an application for the Arduino IOP on the PYNQ-Z1 to communicate with a sensor via SPI. I have the sensor connected to the SPI header and am using the Xilinx-provided SPI library (boards/sw_repo/pynqmb/src/spi.h); however, I cannot find any mention in the docs or example…

You need to first find out which spi controller you want to use. If it is not SPI controller 0, you will have to use spi_open_device() instead ( PYNQ/spi.c at master · Xilinx/PYNQ · GitHub ). Then after open device, you can set up pins. set_pin(spiclk, SPICLK0); set_pin(miso, MISO0); set_pin(mosi,…

Am I using the correct pin numbers for the dedicated SPI header though?

Hello, I’m having the same question as OP. The PYNQ-Z1 board’s documentation only shows the following diagram. [image] I’d like to use the two SPI controllers at the same time, but where can I find the correspondence of the int number of the pins and their names? Is the picture you posted here fr…

I think you need to check Arduino — Python productivity for Zynq (Pynq) but since you are using the dedicated SPI, it may be that you don’t need to provide the pin number. Use PYNQ/spi.c at master · Xilinx/PYNQ · GitHub remember that there are 2 SPI controllers, and the dedicated SPI pins are cont…

Hey rock, thanks for the reply! So my understanding is shown in the code below. I’m using the base.bit and the code would go into the MB processor in base.ARDUINO. #include "spi.h" static spi device0, device1; device0 = spi_open(13, 12, 11, 10) //this uses SPI0 and pins D13~D10 device0 = spi_co…

Your understanding is correct, unless my understanding is also wrong :slight_smile:

Hi @rockstiff , Could you please let me know if it’s also possible to use the other Arduino pins (0-10) as slave select? I am trying to connect multiple slaves for my requirement. Regards, Bhargava

Dedicated SPI pin numbers for PYNQ-Z1 IOP app

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rock October 15, 2020, 7:22pm 4

Pins are correct, but it might be on the other SPI controller. There are 2 SPI controllers, one connected to the dedicated header pin, the other connected to pin 10-13.

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Dedicated SPI pin numbers for PYNQ-Z1 IOP app

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