diff --git a/.github/workflows/test-builds.yml b/.github/workflows/test-builds.yml
index 93bda9726e..6fdd7d67bc 100644
--- a/.github/workflows/test-builds.yml
+++ b/.github/workflows/test-builds.yml
@@ -86,6 +86,7 @@ jobs:
- FLYF407ZG
- rumba32
- LERDGEX
+ - LERDGEK
- mks_robin_nano35_stm32
- NUCLEO_F767ZI
- REMRAM_V1
diff --git a/Marlin/src/HAL/shared/eeprom_if_i2c.cpp b/Marlin/src/HAL/shared/eeprom_if_i2c.cpp
index f6dd33b7c4..27f0233562 100644
--- a/Marlin/src/HAL/shared/eeprom_if_i2c.cpp
+++ b/Marlin/src/HAL/shared/eeprom_if_i2c.cpp
@@ -30,11 +30,17 @@
#if ENABLED(I2C_EEPROM)
#include "eeprom_if.h"
-#include <Wire.h>
+
+#if ENABLED(SOFT_I2C_EEPROM)
+ #include <SlowSoftWire.h>
+ SlowSoftWire Wire = SlowSoftWire(I2C_SDA_PIN, I2C_SCL_PIN, true);
+#else
+ #include <Wire.h>
+#endif
void eeprom_init() {
Wire.begin(
- #if PINS_EXIST(I2C_SCL, I2C_SDA)
+ #if PINS_EXIST(I2C_SCL, I2C_SDA) && DISABLED(SOFT_I2C_EEPROM)
uint8_t(I2C_SDA_PIN), uint8_t(I2C_SCL_PIN)
#endif
);
diff --git a/Marlin/src/lcd/tft_io/st7796s.h b/Marlin/src/lcd/tft_io/st7796s.h
index 8653a49ca2..e1931ed551 100644
--- a/Marlin/src/lcd/tft_io/st7796s.h
+++ b/Marlin/src/lcd/tft_io/st7796s.h
@@ -154,6 +154,9 @@ static const uint16_t st7796s_init[] = {
static const uint16_t lerdge_st7796s_init[] = {
DATASIZE_8BIT,
+ ESC_REG(ST7796S_SWRESET), ESC_DELAY(100),
+ ESC_REG(ST7796S_SLPOUT), ESC_DELAY(20),
+
ESC_REG(ST7796S_CSCON), 0x00C3, // enable command 2 part I
ESC_REG(ST7796S_CSCON), 0x0096, // enable command 2 part II
@@ -165,7 +168,6 @@ static const uint16_t lerdge_st7796s_init[] = {
ESC_REG(ST7796S_PWR2), 0x0015,
ESC_REG(ST7796S_PWR3), 0x00AF,
- ESC_REG(0xC3), 0x0009, // Register not documented in datasheet
ESC_REG(ST7796S_VCMPCTL), 0x0022,
ESC_REG(ST7796S_VCMOST), 0x0000,
ESC_REG(ST7796S_DOCA), 0x0040, 0x008A, 0x0000, 0x0000, 0x0029, 0x0019, 0x00A5, 0x0033,
diff --git a/Marlin/src/pins/stm32f4/pins_LERDGE_K.h b/Marlin/src/pins/stm32f4/pins_LERDGE_K.h
index 1bc7bbc99e..b92056ea86 100644
--- a/Marlin/src/pins/stm32f4/pins_LERDGE_K.h
+++ b/Marlin/src/pins/stm32f4/pins_LERDGE_K.h
@@ -28,7 +28,14 @@
#define BOARD_INFO_NAME "Lerdge K"
#define DEFAULT_MACHINE_NAME "LERDGE"
-#define I2C_EEPROM
+// EEPROM
+#if NO_EEPROM_SELECTED
+ #define I2C_EEPROM
+ #define SOFT_I2C_EEPROM // Force the use of Software I2C
+ #define I2C_SCL_PIN PG14
+ #define I2C_SDA_PIN PG13
+ #define MARLIN_EEPROM_SIZE 0x10000
+#endif
// USB Flash Drive support
#define HAS_OTG_USB_HOST_SUPPORT
@@ -36,7 +43,7 @@
//
// Servos
//
-//#define SERVO0_PIN PB11
+#define SERVO0_PIN PB11
//
// Limit Switches
@@ -96,6 +103,13 @@
// #define E1_CS_PIN PE4
//#endif
+//#define E2_STEP_PIN PF4 // best guess
+//#define E2_DIR_PIN PF3 // best guess
+//#define E2_ENABLE_PIN PF5 // best guess
+//#ifndef E2_CS_PIN
+// #define E2_CS_PIN PB2 // best guess
+//#endif
+
#if HAS_TMC_UART
/**
* TMC2208/TMC2209 stepper drivers
@@ -163,13 +177,19 @@
#ifndef FAN_PIN
#define FAN_PIN PF7
#endif
+
#define FAN1_PIN PF6
-#define FAN2_PIN PF8
#ifndef E0_AUTO_FAN_PIN
- #define E0_AUTO_FAN_PIN PF6
+ #define E0_AUTO_FAN_PIN PB1
#endif
+#ifndef E1_AUTO_FAN_PIN
+ #define E1_AUTO_FAN_PIN PB0
+#endif
+
+#define CONTROLLER_FAN_PIN PF8
+
//
// LED / Lighting
//
@@ -177,10 +197,10 @@
//#define CASE_LIGHT_PIN_DO -1
//#define NEOPIXEL_PIN -1
#ifndef RGB_LED_R_PIN
- #define RGB_LED_R_PIN PB7
+ #define RGB_LED_R_PIN PB8 // swap R and G pin for compatibility with real wires
#endif
#ifndef RGB_LED_G_PIN
- #define RGB_LED_G_PIN PB8
+ #define RGB_LED_G_PIN PB7
#endif
#ifndef RGB_LED_B_PIN
#define RGB_LED_B_PIN PB9
@@ -197,7 +217,7 @@
//
#define SDSS PC11
#define LED_PIN PA15 // Alive
-#define PS_ON_PIN -1
+#define PS_ON_PIN PA4
#define KILL_PIN -1
#define POWER_LOSS_PIN PA4 // Power-loss / nAC_FAULT
@@ -213,17 +233,23 @@
// LCD / Controller
//
-#define TFT_RESET_PIN PD6
-#define TFT_BACKLIGHT_PIN PD3
+#if HAS_FSMC_TFT
+ //#define TFT_DRIVER LERDGE_ST7796
-#define TFT_CS_PIN PD7
-#define TFT_RS_PIN PD11
+ #define TFT_RESET_PIN PD6
+ #define TFT_BACKLIGHT_PIN PD3
-#define TOUCH_CS_PIN PG15
-#define TOUCH_SCK_PIN PB3
-#define TOUCH_MOSI_PIN PB5
-#define TOUCH_MISO_PIN PB4
+ #define TFT_CS_PIN PD7
+ #define TFT_RS_PIN PD11
-#define BTN_EN1 PG10
-#define BTN_EN2 PG11
-#define BTN_ENC PG9
+ #define TOUCH_CS_PIN PG15
+ #define TOUCH_SCK_PIN PB3
+ #define TOUCH_MOSI_PIN PB5
+ #define TOUCH_MISO_PIN PB4
+#endif
+
+#if IS_NEWPANEL
+ #define BTN_EN1 PG10
+ #define BTN_EN2 PG11
+ #define BTN_ENC PG9
+#endif
diff --git a/buildroot/tests/LERDGEK b/buildroot/tests/LERDGEK
new file mode 100755
index 0000000000..1aca42c18a
--- /dev/null
+++ b/buildroot/tests/LERDGEK
@@ -0,0 +1,18 @@
+#!/usr/bin/env bash
+#
+# Build tests for LERDGEK environment
+#
+
+# exit on first failure
+set -e
+
+#
+# Build with the typical configuration
+#
+restore_configs
+opt_set MOTHERBOARD BOARD_LERDGE_K SERIAL_PORT 1
+opt_enable TFT_GENERIC TFT_INTERFACE_FSMC TFT_COLOR_UI
+exec_test $1 $2 "LERDGE K with Generic FSMC TFT with ColorUI" "$3"
+
+# clean up
+restore_configs
diff --git a/ini/features.ini b/ini/features.ini
index 871741dca8..6fa74a343f 100644
--- a/ini/features.ini
+++ b/ini/features.ini
@@ -41,6 +41,7 @@ HAS_(FSMC|SPI|LTDC)_TFT = src_filter=+<src/HAL/STM32/tft> +<src/H
HAS_FSMC_TFT = src_filter=+<src/HAL/STM32/tft/tft_fsmc.cpp> +<src/HAL/STM32F1/tft/tft_fsmc.cpp>
HAS_SPI_TFT = src_filter=+<src/HAL/STM32/tft/tft_spi.cpp> +<src/HAL/STM32F1/tft/tft_spi.cpp>
I2C_EEPROM = src_filter=+<src/HAL/shared/eeprom_if_i2c.cpp>
+SOFT_I2C_EEPROM = SlowSoftI2CMaster, SlowSoftWire=https://github.com/felias-fogg/SlowSoftWire/archive/master.zip
SPI_EEPROM = src_filter=+<src/HAL/shared/eeprom_if_spi.cpp>
HAS_GRAPHICAL_TFT = src_filter=+<src/lcd/tft>
DWIN_CREALITY_LCD = src_filter=+<src/lcd/dwin>
diff --git a/ini/stm32f4.ini b/ini/stm32f4.ini
index ff99296877..325dc4b502 100644
--- a/ini/stm32f4.ini
+++ b/ini/stm32f4.ini
@@ -308,8 +308,7 @@ build_flags = ${stm_flash_drive.build_flags}
platform = ${lerdge_common.platform}
extends = lerdge_common
board_build.firmware = Lerdge_K_firmware_force.bin
-build_flags = ${lerdge_common.build_flags}
- -DLERDGEK
+build_flags = ${lerdge_common.build_flags} -DLERDGEK
#
# Lerdge K with USB Flash Drive Support