Max/earlephilhower_arduino-pico
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7 Commits
Author SHA1 Message Date
Earle F. Philhower, III 6e51516d6c Set default pins for peripherals per datasheet (#103) 
Using the official Raspberry Pi Pico datasheet and the Adafruit Feather
RP2040 schematic, set the default pins for peripherals to match.

Fixes #92
 2021-04-16 10:23:43 -07:00
Earle F. Philhower, III 4076bf85ab Fix INPUT_PULLUP/DOWN, I2C 0-len probes, timeout 
Fix the drive logic for pullup and pulldown inputs.

Add a bitbanged I2C ACK checker for 0-byte I2C transfers (since the HW
doesn't support it).

Add a timeout on I2C reads and writes so they don't hang forever if a
device is not present.

Fixes #38
 2021-03-27 19:50:31 -07:00
Earle F. Philhower, III 73336ddda3 Add I2C slave support and include a simple example 
Also fix the initial pins for the 2nd I2C interface onboard.
 2021-03-27 15:07:10 -07:00
Earle F. Philhower, III b463825374 Rationalize pin selection using readable template 
Use a constexpr template to calculate the valid pins for different IO
hardware.  This lets us have an easily readable list of pin numbers that
we can adjust/check.
 2021-03-25 17:54:46 -07:00
Earle F. Philhower, III e78f833851 Use well known TwoWire class name 
Allows Adafruit GFX libraries to be used
 2021-03-20 15:18:38 -07:00
Earle F. Philhower, III f785f360a9 Fix and test I2C/Wire, works now 2021-03-12 17:39:57 -08:00
Earle F. Philhower, III 4924cd9d35 Add I2C master support library 2021-03-12 13:23:27 -08:00