From 0be986ef13034f3b52cef899bf9f018a184f0224 Mon Sep 17 00:00:00 2001
From: Lars Veldscholte <lars@tuxplace.nl>
Date: Thu, 21 Dec 2023 10:15:46 +0100
Subject: [PATCH] Use software SPI for the display for the Teensy 4.0

---
 src/config.h | 2 ++
 src/main.cpp | 5 +++++
 2 files changed, 7 insertions(+)

diff --git a/src/config.h b/src/config.h
index 5aeb0cd..d658431 100644
--- a/src/config.h
+++ b/src/config.h
@@ -107,6 +107,8 @@ namespace config {
 
 	/// ST7920 LCD pins
 	const uint8_t PIN_LCD_CS = 10;
+  const uint8_t PIN_LCD_MOSI = 11;
+  const uint8_t PIN_LCD_SCLK = 13;
 
 	/// @name Thermistor pins
 	///@{
diff --git a/src/main.cpp b/src/main.cpp
index 13b0fae..cafac15 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -70,7 +70,12 @@ CharDisplayUI ui(&liquidCrystal, &buttonReader, &humidistat, trs);
 
 SetpointProfileRunner spr(&humidistat);
 
+#ifdef ARDUINO_TEENSYLC
 U8G2_ST7920_128X64_F_HW_SPI u8g2(U8G2_R0, config::PIN_LCD_CS);
+#endif
+#ifdef ARDUINO_TEENSY40
+U8G2_ST7920_128X64_F_SW_SPI u8g2(U8G2_R0, config::PIN_LCD_SCLK, config::PIN_LCD_MOSI, config::PIN_LCD_CS);
+#endif
 GraphicalDisplayUI<cHumidistat> ui(&u8g2, &buttonReader, &humidistat, trs, &eepromConfig, &spr);
 #endif