✨ Creality STM32F401RE board (e.g., Ender-5 S1)

[thinkyhead]

Add support for the CR4NS200141C13 board found in the Creality Ender-5 S1.

• Add the M936 command required by the bootloader to flash this board and associated RTS controller firmware.
• Add Thermistor 14 that is defined with the Ender-5 S1, although only used on some other machine(s).
• Extend Thermistor 1 range up to 320°C.

This also reduces the rom LENGTH to 512K - 64K for the creality.ld linker script, which makes sense for firmware that goes at address 0x08010000, which includes those using env:STM32F401RC_creality.

[ellensp]

This also sneakily changed thermistor type 1 max temperature reading to 320.
But the real stock type 1 cannot read over 300C!!!!

This is really bad for anyone with a real type 1

[ellensp]

The 10 pin exp port is only partially defined.. no EXP1_01_PIN, no EXP1_02_PIN

I am leaving this here... so someone with that board can try it and check the missing pins

diff --git a/Marlin/src/pins/stm32f4/pins_CREALITY_F401.h b/Marlin/src/pins/stm32f4/pins_CREALITY_F401.h
index f4b5b7d96a..46c627507f 100644
--- a/Marlin/src/pins/stm32f4/pins_CREALITY_F401.h
+++ b/Marlin/src/pins/stm32f4/pins_CREALITY_F401.h
@@ -128,16 +128,69 @@
 #define SDIO_SUPPORT
 #define NO_SD_HOST_DRIVE                          // This board's SD is only seen by the printer
 
-// SPI 2
-#if ENABLED(RET6_12864_LCD)
+/* 
+ *                -----
+ *        PC6 ?? |1   2| ?? PB2
+ *    TX2 PA2 ?? |3   4| ?? PA3 RX2
+ *SPI2_MISO PB14 |5   6| PB13 SPI2_SCK
+ * SPI2_NSS PB12 |7   8| PB15 SPI2_MOSI
+ *          GND  |9  10| VCC
+ *                -----
+ *                EXP1
+ */
 
-  #define LCD_PINS_RS                       PB12
-  #define LCD_PINS_EN                       PB15
-  #define LCD_PINS_D4                       PB13
-  #define BTN_EN2                           PB14
-#endif
+#define EXP1_01_PIN                        PC6 // a guess from limted info avalable
+#define EXP1_02_PIN                        PB2 // a guess from limted info avalable
+#define EXP1_03_PIN                        PA2 // a guess from limted info avalable
+#define EXP1_04_PIN                        PA3 // a guess from limted info avalable
+#define EXP1_05_PIN                        PB14
+#define EXP1_06_PIN                        PB13
+#define EXP1_07_PIN                        PB12
+#define EXP1_08_PIN                        PB15
+
+#if ENABLED(CR10_STOCKDISPLAY)
+/**
+ *         ------
+ * BEEPER | 1  2 | ENC
+ *    EN1 | 3  4 |
+ *    EN2   5  6 | D4
+ *     RS | 7  8 | EN
+ *    GND | 9 10 | VCC
+ *         ------
+ *         CR10
+ */
+  #define LCD_PINS_RS              EXP1_07_PIN
+
+  #define BTN_ENC                  EXP1_02_PIN
+  #define BTN_EN1                  EXP1_03_PIN
+  #define BTN_EN2                  EXP1_05_PIN
+
+  #define LCD_PINS_RS              EXP1_07_PIN
+  #define LCD_PINS_EN              EXP1_08_PIN
+  #define LCD_PINS_D4              EXP1_06_PIN
 
-//#define LED_CONTROL_PIN                   PA7
+  #define BEEPER_PIN               EXP1_01_PIN
+
+#elif HAS_DWIN_E3V2 || IS_DWIN_MARLINUI
+/**
+ *       ------
+ *      | 1  2 |
+ *   RX | 3  4 | TX
+ *  ENT   5  6 | BEEP
+ *    B | 7  8 | A
+ *  GND | 9 10 | VCC
+ *       ------
+ *        DWIN
+ */
+
+  #define LCD_SERIAL_PORT 2
+
+  #define BTN_ENC                      EXP1_05_PIN
+  #define BTN_EN1                      EXP1_08_PIN
+  #define BTN_EN2                      EXP1_07_PIN
+
+  #define BEEPER_PIN                   EXP1_06_PIN
+#endif
 
 //
 // WiFI Reset