237a238,301
>   
>   #elif ENABLED(FYSETC_MINI_12864_2_1)
> 
>     #error "CAUTION! FYSETC_MINI_12864_2_1 / MKS_MINI_12864_V3 / BTT_MINI_12864_V1 requires wiring modifications. See 'pins_BTT_SKR_MINI_E3_common.h' for details. Comment out this line to continue."
> 
>     /**
>      * FYSETC_MINI_12864_2_1 / MKS_MINI_12864_V3 / BTT_MINI_12864_V1 display pinout
>      *
>      *       Board                      Display
>      *       ------                     ------
>      * PB5  |10  9 | PA15       (BEEP) |10  9 | BTN_ENC
>      * PA9  | 8  7 | RESET      LCD_CS | 8  7 | LCD A0
>      * PA10 | 6  5 | PB9       LCD_RST | 6  5 | RED
>      * PB8  | 4  3 | PB15      (GREEN) | 4  3 | (BLUE)
>      * GND  | 2  1 | 5V            GND | 2  1 | 5V
>      *       ------                     ------
>      *        EXP1                       EXP1
>      *
>      *            ---                   ------
>      *       RST | 1 |          (MISO) |10  9 | SCK
>      * (RX2) PA2 | 2 |         BTN_EN1 | 8  7 | (SS)
>      * (TX2) PA3 | 3 |         BTN_EN2 | 6  5 | MOSI
>      *       GND | 4 |            (CD) | 4  3 | (RST)
>      *        5V | 5 |           (GND) | 2  1 | (KILL)
>      *            ---                   ------
>      *            TFT                    EXP2
>      *
>      * Needs custom cable:
>      *
>      *    Board             Display
>      *
>      *   EXP1-1 ----------- EXP1-1
>      *   EXP1-2 ----------- EXP1-2
>      *   EXP1-3 ----------- EXP2-6
>      *   EXP1-4 ----------- EXP1-5
>      *   EXP1-5 ----------- EXP2-8
>      *   EXP1-6 ----------- EXP1-6
>      *   EXP1-8 ----------- EXP1-8
>      *   EXP1-9 ----------- EXP1-9
>      *  EXP1-10 ----------- EXP1-7
>      *
>      *    TFT-2 ----------- EXP2-9
>      *    TFT-3 ----------- EXP2-5
>      *
>      * for backlight configuration see steps 2 (V2.1) and 3 in https://wiki.fysetc.com/Mini12864_Panel/
>      */
> 
>     #define LCD_PINS_RS                     PA9     // CS
>     #define LCD_PINS_ENABLE                 PA3     // MOSI
>     #define LCD_BACKLIGHT_PIN               -1
>     #define NEOPIXEL_PIN                    PB8
>     #define LCD_CONTRAST                    255
>     #define LCD_RESET_PIN                   PA10
> 
>     #define DOGLCD_CS                       PA9
>     #define DOGLCD_A0                       PB5
>     #define DOGLCD_SCK                      PA2
>     #define DOGLCD_MOSI                     PA3
> 
>     #define BTN_ENC                         PA15
>     #define BTN_EN1                         PB9
>     #define BTN_EN2                         PB15
> 
>     #define FORCE_SOFT_SPI
240c304
<     #error "Only CR10_STOCKDISPLAY, ZONESTAR_LCD, ENDER2_STOCKDISPLAY, MKS_MINI_12864, and TFTGLCD_PANEL_(SPI|I2C) are currently supported on the BIGTREE_SKR_MINI_E3."
---
>     #error "Only CR10_STOCKDISPLAY, ZONESTAR_LCD, ENDER2_STOCKDISPLAY, MKS_MINI_12864, TFTGLCD_PANEL_(SPI|I2C), FYSETC_MINI_12864_2_1, MKS_MINI_12864_V3, and BTT_MINI_12864_V1 are currently supported on the BIGTREE_SKR_MINI_E3."