Required GPIO pins for Inky pHAT

[pimoroni]

Required GPIO pins for Inky pHAT

[Gadgetoid]

Chip-Select 0 is, indeed, BCM8. That CS0_PIN variable should probably just be CS0 since it refers to an SPI Chip-Select channel and not a BCM pin. MOSI and SCLK are also implicit to SPI port 0- so spidev.SpiDev(0, 0) uses BCM 10, BCM 9, BCM 11 and BCM 8.

You should also ensure all the Groudn connections are made and, potentially, also Physical Pin 17 (the other 3.3v power)

[JimMadge]

Thanks for your help, here is what I found.

Chip pins,

• BCM 17 (Chip Busy)
• BCM 27 (Chip Reset)
• BCM 22 (Chip Command)

SPI pins,

• BCM 8 (SPI Chip Select)
• BCM 9 (SPI MISO)
• BCM 10 (SPI MOSI)
• BCM 11 (SPI SCLK)

Power pins,

• Physical pin 1 (3v3)
• Physical pin 2 (5v)
• Any one ground pin (except 30!?) (6, 9, 14, 20, 25, 34, 39)

I wonder if the ground pin issue is just my board. Would you like me to make a pull request documenting these pins (and possibly renaming the CS0_PIN variable) somewhere in the repository?

I will make a pull request on https://github.com/gadgetoid/Pinout.xyz to add the missing SPI pin.

[Gadgetoid]

I don't believe MISO (BCM11) is phsyically connected, but otherwise this seems sensible.

Documentation is always welcome.. and- yes- that CS0_PIN variable could stand to have less confusing name.

[JimMadge]

I had another chance to check. I was mistaken, MISO is not required.