From af63cf8752ac0a40e8a103e56df6277c6529318e Mon Sep 17 00:00:00 2001
From: Caril <caril.martinez@cti.espol.edu.ec>
Date: Tue, 29 Oct 2024 14:31:49 -0500
Subject: [PATCH] Add custom variants configuration for Adafruit Feather
nRF52840 Express
---
variants/feather_nrf52840_express/variant.cpp | 111 +++++++++++++
variants/feather_nrf52840_express/variant.h | 146 ++++++++++++++++++
2 files changed, 257 insertions(+)
create mode 100644 variants/feather_nrf52840_express/variant.cpp
create mode 100644 variants/feather_nrf52840_express/variant.h
diff --git a/variants/feather_nrf52840_express/variant.cpp b/variants/feather_nrf52840_express/variant.cpp
new file mode 100644
index 0000000..f30150f
--- /dev/null
+++ b/variants/feather_nrf52840_express/variant.cpp
@@ -0,0 +1,111 @@
+/*
+ Copyright (c) 2014-2015 Arduino LLC. All right reserved.
+ Copyright (c) 2016 Sandeep Mistry All right reserved.
+ Copyright (c) 2018, Adafruit Industries (adafruit.com)
+
+ This library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ This library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+ See the GNU Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with this library; if not, write to the Free Software
+ Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+*/
+
+#include "variant.h"
+#include "wiring_constants.h"
+#include "wiring_digital.h"
+#include "nrf.h"
+
+const uint32_t g_ADigitalPinMap[] =
+{
+ // D0 .. D13
+ 47, // D0 is P1.15
+ 24, // D1 is P0.24 ()
+ 32+13, // D2 is P0.10
+ 25, // D3 is P0.25 (LED1)
+ 32, // D4 is P1.00 (LED2)
+ 40, // D5 is P1.08
+ 7, // D6 is P0.07
+ 34, // D7 is P1.02
+ 16, // D8 is P0.16 (Motor)
+ 26, // D9 is P0.26
+ 27, // D10 is P0.27
+ 6, // D11 is P0.06
+ 8, // D12 is P0.08
+ 41, // D13 is P1.09
+
+ // D14 .. D21 (aka A0 .. A7)
+ 4, // D14 is P0.04 (A0)
+ 5, // D15 is P0.05 (A1) (BAT)
+ 30, // D16 is P0.30 (A2)
+ 28, // D17 is P0.28 (A3)
+ 2, // D18 is P0.02 (A4)
+ 3, // D19 is P0.03 (A5)
+ 29, // D20 is P0.29 (A6)
+ 31, // D21 is P0.31 (A7)
+
+ // D22 .. D23 (i2c)
+ 12, // D22 is P0.12 (SDA)
+ 11, // D23 is P0.11 (SCL)
+
+ // D24 .. D26 (aka SPI pins)
+ 15, // D24 is P0.15 (SPI MOSO+I)
+ 13, // D25 is P0.13 (SPI MISO)
+ 14, // D26 is P0.14 (SPI SCK )
+
+ // QSPI pins (not exposed via any header / test point)
+ 19, // D27 is P0.19 (QSPI CLK)
+ 20, // D28 is P0.20 (QSPI CS)
+ 17, // D29 is P0.17 (QSPI Data 0)
+ 22, // D30 is P0.22 (QSPI Data 1)
+ 23, // D31 is P0.23 (QSPI Data 2)
+ 21, // D32 is P0.21 (QSPI Data 3)
+
+ //
+ 32+12, // D33 is P1.12
+
+ 32+14, // D34 is P1.14
+
+ // Thus, there are 35 defined pins
+
+ // The remaining pins are not usable:
+ //
+ //
+ // The following pins were never listed as they were considered unusable
+ // 0, // P0.00 is XL1 (attached to 32.768kHz crystal)
+ // 1, // P0.01 is XL2 (attached to 32.768kHz crystal)
+ // 18, // P0.18 is RESET (attached to switch)
+ // 32, // P1.00 is SWO (attached to debug header)
+ //
+ // The remaining pins are not connected (per schematic)
+ // 33, // P1.01 is not connected per schematic
+ // 35, // P1.03 is not connected per schematic
+ // 36, // P1.04 is not connected per schematic
+ // 37, // P1.05 is not connected per schematic
+ // 38, // P1.06 is not connected per schematic
+ // 39, // P1.07 is not connected per schematic
+ // 43, // P1.11 is not connected per schematic
+ // 44, // P1.12 is not connected per schematic
+ // 45, // P1.13 is not connected per schematic
+};
+
+void initVariant()
+{
+ // LED1 & LED2
+ pinMode(PIN_LED1, OUTPUT);
+ ledOff(PIN_LED1);
+
+ pinMode(PIN_LED2, OUTPUT);
+ ledOff(PIN_LED2);
+
+ pinMode(PIN_NEOPIXEL_POWER, OUTPUT);
+ digitalWrite(PIN_NEOPIXEL_POWER, HIGH);
+}
+
diff --git a/variants/feather_nrf52840_express/variant.h b/variants/feather_nrf52840_express/variant.h
new file mode 100644
index 0000000..971607e
--- /dev/null
+++ b/variants/feather_nrf52840_express/variant.h
@@ -0,0 +1,146 @@
+ /*
+ Copyright (c) 2014-2015 Arduino LLC. All right reserved.
+ Copyright (c) 2016 Sandeep Mistry All right reserved.
+ Copyright (c) 2018, Adafruit Industries (adafruit.com)
+
+ This library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+ This library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+ See the GNU Lesser General Public License for more details.
+ You should have received a copy of the GNU Lesser General Public
+ License along with this library; if not, write to the Free Software
+ Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+*/
+
+#ifndef _VARIANT_FEATHER52840_
+#define _VARIANT_FEATHER52840_
+
+/** Master clock frequency */
+#define VARIANT_MCK (64000000ul)
+
+#define USE_LFXO // Board uses 32khz crystal for LF
+// define USE_LFRC // Board uses RC for LF
+
+/*----------------------------------------------------------------------------
+ * Headers
+ *----------------------------------------------------------------------------*/
+
+#include "WVariant.h"
+
+#ifdef __cplusplus
+extern "C"
+{
+#endif // __cplusplus
+
+// Number of pins defined in PinDescription array
+#define PINS_COUNT (35)
+#define NUM_DIGITAL_PINS (35)
+#define NUM_ANALOG_INPUTS (6) // A6 is used for battery, A7 is analog reference
+#define NUM_ANALOG_OUTPUTS (0)
+
+// LEDs
+#define PIN_LED1 (3)
+#define PIN_LED2 (4)
+#define PIN_NEOPIXEL_POWER (34)
+#define PIN_NEOPIXEL (8)
+#define NEOPIXEL_NUM 1
+
+#define LED_BUILTIN PIN_LED1
+#define LED_CONN PIN_LED2
+
+#define LED_RED PIN_LED1
+#define LED_BLUE PIN_LED2
+
+#define LED_STATE_ON 1 // State when LED is litted
+
+/*
+ * Buttons
+ */
+#define PIN_BUTTON1 (1)
+#define PIN_BUTTON2 (9)
+#define PIN_BUTTON3 (23)
+#define PIN_BUTTON4 (1)
+
+/*
+ * Analog pins
+ */
+#define PIN_A0 (14)
+#define PIN_A1 (15)
+#define PIN_A2 (16)
+#define PIN_A3 (17)
+#define PIN_A4 (18)
+#define PIN_A5 (19)
+#define PIN_A6 (20)
+#define PIN_A7 (21)
+
+static const uint8_t A0 = PIN_A0 ;
+static const uint8_t A1 = PIN_A1 ;
+static const uint8_t A2 = PIN_A2 ;
+static const uint8_t A3 = PIN_A3 ;
+static const uint8_t A4 = PIN_A4 ;
+static const uint8_t A5 = PIN_A5 ;
+static const uint8_t A6 = PIN_A6 ;
+static const uint8_t A7 = PIN_A7 ;
+#define ADC_RESOLUTION 14
+
+// Other pins
+#define PIN_AREF PIN_A7
+#define PIN_VBAT PIN_A1
+#define PIN_NFC1 (33)
+#define PIN_NFC2 (2)
+
+static const uint8_t AREF = PIN_AREF;
+
+/*
+ * Serial interfaces
+ */
+#define PIN_SERIAL1_RX (1)
+#define PIN_SERIAL1_TX (0)
+
+/*
+ * SPI Interfaces
+ */
+#define SPI_INTERFACES_COUNT 1
+
+#define PIN_SPI_MISO (5)
+#define PIN_SPI_MOSI (24)
+#define PIN_SPI_SCK (26)
+
+static const uint8_t SS = (5);
+static const uint8_t MOSI = PIN_SPI_MOSI ;
+static const uint8_t MISO = PIN_SPI_MISO ;
+static const uint8_t SCK = PIN_SPI_SCK ;
+
+/*
+ * Wire Interfaces
+ */
+#define WIRE_INTERFACES_COUNT 1
+
+#define PIN_WIRE_SDA (19)
+#define PIN_WIRE_SCL (17)
+
+// QSPI Pins
+#define PIN_QSPI_SCK 27
+#define PIN_QSPI_CS 28
+#define PIN_QSPI_IO0 29
+#define PIN_QSPI_IO1 30
+#define PIN_QSPI_IO2 31
+#define PIN_QSPI_IO3 32
+
+// On-board QSPI Flash
+#define EXTERNAL_FLASH_DEVICES GD25Q16C
+#define EXTERNAL_FLASH_USE_QSPI
+
+#ifdef __cplusplus
+}
+#endif
+
+/*----------------------------------------------------------------------------
+ * Arduino objects - C++ only
+ *----------------------------------------------------------------------------*/
+
+#endif
--
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