| # Copyright (c) 2019 Foundries.io |
| # Copyright (C) 2019 Peter Bigot Consulting, LLC |
| # SPDX-License-Identifier: Apache-2.0 |
| |
| description: | |
| GPIO pins exposed on Arduino Uno (R3) headers. |
| |
| The Arduino Uno layout provides four headers, two each along |
| opposite edges of the board. |
| |
| Proceeding counter-clockwise: |
| * An 8-pin Power Supply header. No pins on this header are exposed |
| by this binding. |
| * A 6-pin Analog Input header. This has analog input signals |
| labeled from A0 at the top through A5 at the bottom. |
| * An 8-pin header (opposite Analog Input). This has digital input |
| signals labeled from D0 at the bottom D7 at the top; |
| * A 10-pin header (opposite Power Supply). This has six additional |
| digital input signals labelled from D8 at the bottom through D13 |
| towards the top, skipping two pins, then finishing with D14 and |
| D15 at the top. |
| |
| This binding provides a nexus mapping for 20 pins where parent pins 0 |
| through 5 correspond to A0 through A5, and parent pins 6 through 21 |
| correspond to D0 through D15, as depicted below: |
| |
| D15 21 |
| D14 20 |
| AREF - |
| GND - |
| - N/C D13 19 |
| - IOREF D12 18 |
| - RESET D11 17 |
| - 3V3 D10 16 |
| - 5V D9 15 |
| - GND D8 14 |
| - GND |
| - VIN D7 13 |
| D6 12 |
| 0 A0 D5 11 |
| 1 A1 D4 10 |
| 2 A2 D3 9 |
| 3 A3 D2 8 |
| 4 A4 D1 7 |
| 5 A5 D0 6 |
| |
| |
| compatible: "arduino-header-r3" |
| |
| include: [gpio-nexus.yaml, base.yaml] |
