From b1f6ff1280f45a27eb365ced0c6b966a354c3079 Mon Sep 17 00:00:00 2001
From: Mark Trevor Birss <markbirss@gmail.com>
Date: Sat, 5 Aug 2023 17:10:00 +0200
Subject: [PATCH] Update variant.h

---
 variants/m5stack_coreink/variant.h | 33 ++++++++++++++++++++++++++++++
 1 file changed, 33 insertions(+)

diff --git a/variants/m5stack_coreink/variant.h b/variants/m5stack_coreink/variant.h
index 3abf16be7..703fce624 100644
--- a/variants/m5stack_coreink/variant.h
+++ b/variants/m5stack_coreink/variant.h
@@ -39,7 +39,9 @@
 #undef RF95_MOSI
 #undef RF95_NSS
 #define USE_RF95
+//#define USE_SX1280
 
+#ifdef USE_RF95
 #define RF95_SCK 18
 #define RF95_MISO 34
 #define RF95_MOSI 23
@@ -48,6 +50,22 @@
 #define LORA_RESET 26
 #define LORA_DIO1 RADIOLIB_NC
 #define LORA_DIO2 RADIOLIB_NC
+#endif
+
+#ifdef USE_SX1280
+#define RF95_SCK 18
+#define RF95_MISO 34
+#define RF95_MOSI 23
+#define RF95_NSS 14
+#define LORA_RESET 26
+#define LORA_DIO1 25
+#define LORA_DIO2 13
+#define SX128X_CS RF95_NSS
+#define SX128X_DIO1 LORA_DIO1
+#define SX128X_BUSY LORA_DIO2
+#define SX128X_RESET LORA_RESET
+#define SX128X_MAX_POWER 13 // 10
+#endif
 
 #define USE_EINK
 // https://docs.m5stack.com/en/core/coreink
@@ -59,3 +77,18 @@
 #define PIN_EINK_RES -1  // Connected but not needed
 #define PIN_EINK_SCLK 18 // EPD_SCLK
 #define PIN_EINK_MOSI 23 // EPD_MOSI
+
+#define BATTERY_PIN 35
+#define ADC_CHANNEL ADC1_GPIO35_CHANNEL
+// https://m5stack.oss-cn-shenzhen.aliyuncs.com/resource/docs/schematic/Core/m5paper/M5_PAPER_SCH.pdf
+// https://github.com/m5stack/M5Core-Ink/blob/master/examples/Basics/FactoryTest/FactoryTest.ino#L58
+//  VBAT
+//   |
+//  R83 (3K)
+//   +
+//  R86 (11K)
+//   |
+//  GND
+// https://github.com/m5stack/M5Core-Ink/blob/master/examples/Basics/FactoryTest/FactoryTest.ino#L58
+#define ADC_MULTIPLIER 5 // Just a guess for now... more detailed getBatVoltage above
+                         // https://embeddedexplorer.com/esp32-adc-esp-idf-tutorial/