There are a couple of things I don’t understand.
Let’s take port D7 and D8 on the GrovePi+. There are pins on the diagram labelled “7” and “8” on D7 and “8” and “9” on D8. Are those two “8” pins the same pins? Why are there two pins for a digital port?
Which pins from the GPIO are connected to the Ports? Is there any way for me to tell?
My ultimate goal here is to know which pins I can use from the GPIO off the top of the GrovePi without interfering with it. I need 5 pins for a control of some ICs in addition to some support from the GrovePi (for the LCD display and making it easier to run some switches).
Edit 1: I did find this older link but there are three issues: I’m not sure if it’s exhaustive; I don’t know if it’s using GPIO pin numbers or physical ordering; and irrespective of #2:
- If it’s using GPIO, then it doesn’t make sense as the Raspberry pi has no GPIO 0 and 1
- If it’s using physical numbering, then there is still no pin 0, and pin 9 is ground.
Edit 2: It might be that you guys are using a naming that I haven’t found in use for the board. Basically, it looks like if I consult this schematic I just have to avoid physical pins 3, 5, 8, 10, 19, 21, 23, and 24. Is that correct?