/**
 * Marlin 3D Printer Firmware
 * Copyright (c) 2020 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
 *
 * Based on Sprinter and grbl.
 * Copyright (c) 2011 Camiel Gubbels / Erik van der Zalm
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 */
#pragma once

#ifndef TARGET_STM32F1
  #error "Oops! Select an STM32F1 board in 'Tools > Board.'"
#endif

// Release PB3/PB4 (E0 STP/DIR) from JTAG pins
#define DISABLE_JTAG

// Ignore temp readings during development.
//#define BOGUS_TEMPERATURE_GRACE_PERIOD 2000

#define FLASH_EEPROM_EMULATION
#define EEPROM_PAGE_SIZE     uint16(0x800) // 2KB
#define EEPROM_START_ADDRESS uint32(0x8000000 + (STM32_FLASH_SIZE) * 1024 - 2 * EEPROM_PAGE_SIZE)
#undef E2END
#define E2END                (EEPROM_PAGE_SIZE - 1) // 2KB

//
// Servos
//
#define SERVO0_PIN                          PA1

//
// Limit Switches
//
#define X_STOP_PIN                          PC0
#define Y_STOP_PIN                          PC1
#define Z_STOP_PIN                          PC2

//
// Z Probe must be this pins
//
#define Z_MIN_PROBE_PIN                     PC14

//
// Filament Runout Sensor
//
#ifndef FIL_RUNOUT_PIN
  #define FIL_RUNOUT_PIN                    PC15  // "E0-STOP"
#endif

//
// Steppers
//
#define X_ENABLE_PIN                        PB14
#define X_STEP_PIN                          PB13
#define X_DIR_PIN                           PB12

#define Y_ENABLE_PIN                        PB11
#define Y_STEP_PIN                          PB10
#define Y_DIR_PIN                           PB2

#define Z_ENABLE_PIN                        PB1
#define Z_STEP_PIN                          PB0
#define Z_DIR_PIN                           PC5

#define E0_ENABLE_PIN                       PD2
#define E0_STEP_PIN                         PB3
#define E0_DIR_PIN                          PB4

//
// Temperature Sensors
//
#define TEMP_0_PIN                          PA0   // Analog Input
#define TEMP_BED_PIN                        PC3   // Analog Input

//
// Heaters / Fans
//
#define HEATER_0_PIN                        PC8   // EXTRUDER
#define HEATER_BED_PIN                      PC9   // BED
#define FAN_PIN                             PA8

//
// USB connect control
//
#define USB_CONNECT_PIN                     PC13
#define USB_CONNECT_INVERTING false

#define SD_DETECT_PIN                       PC4

/**
 *                 _____
 *             5V | 1 2 | GND
 *  (LCD_EN) PB7  | 3 4 | PB8  (LCD_RS)
 *  (LCD_D4) PB9  | 5 6   PA10 (BTN_EN2)
 *          RESET | 7 8 | PA9  (BTN_EN1)
 * (BTN_ENC) PB6  | 9 10| PB5  (BEEPER)
 *                 -----
 *                 EXP1
 */

#define EXPA1_03_PIN                        PB7
#define EXPA1_04_PIN                        PB8
#define EXPA1_05_PIN                        PB9
#define EXPA1_06_PIN                        PA10
#define EXPA1_07_PIN                        -1
#define EXPA1_08_PIN                        PA9
#define EXPA1_09_PIN                        PB6
#define EXPA1_10_PIN                        PB5

#if HAS_SPI_LCD

  #if ENABLED(CR10_STOCKDISPLAY)

    #define BEEPER_PIN              EXPA1_10_PIN

    #define BTN_EN1                 EXPA1_08_PIN
    #define BTN_EN2                 EXPA1_06_PIN
    #define BTN_ENC                 EXPA1_09_PIN

    #define LCD_PINS_RS             EXPA1_04_PIN
    #define LCD_PINS_ENABLE         EXPA1_03_PIN
    #define LCD_PINS_D4             EXPA1_05_PIN

  #elif ENABLED(ZONESTAR_LCD)                     // ANET A8 LCD Controller - Must convert to 3.3V - CONNECTING TO 5V WILL DAMAGE THE BOARD!

    #error "CAUTION! ZONESTAR_LCD requires wiring modifications. See 'pins_BTT_SKR_MINI_E3.h' for details. Comment out this line to continue."

    #define LCD_PINS_RS             EXPA1_05_PIN
    #define LCD_PINS_ENABLE         EXPA1_09_PIN
    #define LCD_PINS_D4             EXPA1_04_PIN
    #define LCD_PINS_D5             EXPA1_06_PIN
    #define LCD_PINS_D6             EXPA1_08_PIN
    #define LCD_PINS_D7             EXPA1_10_PIN
    #define ADC_KEYPAD_PIN                  PA1   // Repurpose servo pin for ADC - CONNECTING TO 5V WILL DAMAGE THE BOARD!

  #elif EITHER(MKS_MINI_12864, ENDER2_STOCKDISPLAY)

    /** Creality Ender-2 display pinout
     *                   _____
     *               5V | 1 2 | GND
     *      (MOSI) PB7  | 3 4 | PB8  (LCD_RS)
     *    (LCD_A0) PB9  | 5 6   PA10 (BTN_EN2)
     *            RESET | 7 8 | PA9  (BTN_EN1)
     *   (BTN_ENC) PB6  | 9 10| PB5  (SCK)
     *                   -----
     *                    EXP1
     */
    #define BTN_EN1                 EXPA1_08_PIN
    #define BTN_EN2                 EXPA1_06_PIN
    #define BTN_ENC                 EXPA1_09_PIN

    #define DOGLCD_CS               EXPA1_04_PIN
    #define DOGLCD_A0               EXPA1_05_PIN
    #define DOGLCD_SCK              EXPA1_10_PIN
    #define DOGLCD_MOSI             EXPA1_03_PIN
    #define FORCE_SOFT_SPI
    #define LCD_BACKLIGHT_PIN               -1

  #else

    #error "Only ZONESTAR_LCD, MKS_MINI_12864, ENDER2_STOCKDISPLAY, and CR10_STOCKDISPLAY are currently supported on the BIGTREE_SKR_MINI_E3."

  #endif

#endif // HAS_SPI_LCD

//
// SD Support
//
#ifndef SDCARD_CONNECTION
  #define SDCARD_CONNECTION              ONBOARD
#endif

#define ON_BOARD_SPI_DEVICE 1                     // SPI1
#define ONBOARD_SD_CS_PIN                   PA4   // Chip select for "System" SD card