Mutiple hats on Zero v1.3 (Pimoroni BLINKT + Adafruit's TFT/OLED bonnet's connflict on GPIO23)

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memfault
 
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Mutiple hats on Zero v1.3 (Pimoroni BLINKT + Adafruit's TFT/OLED bonnet's connflict on GPIO23)

Post by memfault »

Hi,

I've recently has been given as extra(with the EdgeBadge) Raspberry Pi Zero v1.3 + Pimoroni Blinkt!.
https://pinout.xyz/pinout/blinkt
Except power, it only uses 16(GPIO 23/Data) and 18(GPIO 24/Clock pins)
Pretty boring setup (in comparison to EdgeBadge or Micro:bit [another extra ;-]), and then I've found two interesting adafruit hats:
https://learn.adafruit.com/adafruit-1-3 ... spberry-pi
"GPIO17, GPIO22, GPIO27, GPIO23 - The four directions on the joystick."

https://learn.adafruit.com/adafruit-128 ... spberry-pi
"button_R = DigitalInOut(board.D23)
button_R.direction = Direction.INPUT
button_R.pull = Pull.UP"

"# Create the I2C interface.
i2c = busio.I2C(board.SCL, board.SDA)"

In both cases I would have conflict on "GPIO 23"(16th PIN), so probably whole idea is doomed.

I do also wonder if those joysticks/buttons would be usable in games (I really love my PyBadges to play with kids in MakeCode Arcade, but Pi Zero with beefier CPU + HDMI could act as portable retroarch handheld with docking capability (SteamDeck is too bulky for me ;-)


1st option has much bigger color IPS screen, but screen covers PiHat connector.

2nd option got way smaller, monochrome OLED, but maybe i could use it with Pimoroni Blinkt! (there's conflict on 23, so I'm worried that answer is nor :-( , but I don't like wasting things ;-)

I do also wonder if I could also add sound output and battery. Device woud get stupidly bulky with another hat, so probably passiv buzzer would be enough.
I'm also not sure about battery charging circuit.
Because of 5V need I guess that 3.7v LiPo is out of question (I've acces to cheap 6.4V LiFePO4 packs with protection circuit. Not sure if it's the best route...)

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