text: /**
   * Marlin 3D Printer Firmware
   * Copyright (c) 2020 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
   *
   * 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
  
  /**
   * Longer3D LK1/LK2 & Alfawise U20/U30 (STM32F103VET6) board pin assignments
   */
  
  #if !defined(__STM32F1__) && !defined(STM32F1xx)
    #error "Oops! Select a STM32F1 board in 'Tools > Board.'"
  #elif HOTENDS > 1 || E_STEPPERS > 1
    #error "Longer3D board only supports 1 hotend / E-stepper. Comment out this line to continue."
  #endif
  
  #define BOARD_INFO_NAME "Longer3D"
  #define ALFAWISE_UX0             // Common to all Longer3D STM32F1 boards (used for Open drain mosfets)
  
  //#define DISABLE_DEBUG          //  We still want to debug with STLINK...
  #define DISABLE_JTAG             //  We free the jtag pins (PA15) but keep STLINK
                                   //  Release PB4 (STEP_X_PIN) from JTAG NRST role.
  //
  // Limit Switches
  //
  #define X_MIN_PIN          PC1   // pin 16
  #define X_MAX_PIN          PC0   // pin 15 (Filament sensor on Alfawise setup)
  #define Y_MIN_PIN          PC15  // pin 9
  #define Y_MAX_PIN          PC14  // pin 8 (Unused in stock Alfawise setup)
  #define Z_MIN_PIN          PE6   // pin 5 Standard Endstop or Z_Probe endstop function
  #define Z_MAX_PIN          PE5   // pin 4 (Unused in stock Alfawise setup)
                                   // May be used for BLTouch Servo function on older variants (<= V08)
  #define ONBOARD_ENDSTOPPULLUPS
  
  //
  // Filament Sensor
  //
  #ifndef FIL_RUNOUT_PIN
    #define FIL_RUNOUT_PIN   PC0   // XMAX plug on PCB used as filament runout sensor on Alfawise boards (inverting true)
  #endif
  
  //
  // Steppers
  //
  #define X_ENABLE_PIN       PB5   // pin 91
  #define X_STEP_PIN         PB4   // pin 90
  #define X_DIR_PIN          PB3   // pin 89
  
  #define Y_ENABLE_PIN       PB8   // pin 95
  #define Y_STEP_PIN         PB7   // pin 93
  #define Y_DIR_PIN          PB6   // pin 92
  
  #define Z_ENABLE_PIN       PE1   // pin 98
  #define Z_STEP_PIN         PE0   // pin 97
  #define Z_DIR_PIN          PB9   // pin 96
  
  #define E0_ENABLE_PIN      PE4   // pin 3
  #define E0_STEP_PIN        PE3   // pin 2
  #define E0_DIR_PIN         PE2   // pin 1
  
  //
  // Temperature Sensors
  //
  #define TEMP_0_PIN         PA0   // pin 23 (Nozzle 100K/3950 thermistor)
  #define TEMP_BED_PIN       PA1   // pin 24 (Hot Bed 100K/3950 thermistor)
  
  //
  // Heaters / Fans
  //
  #define HEATER_0_PIN       PD3   // pin 84 (Nozzle Heat Mosfet)
  #define HEATER_BED_PIN     PA8   // pin 67 (Hot Bed Mosfet)
  
  #define FAN_PIN            PA15  // pin 77 (4cm Fan)
  #define FAN_SOFT_PWM             // Required to avoid issues with heating or STLink
  #define FAN_MIN_PWM        35    // Fan will not start in 1-30 range
  #define FAN_MAX_PWM        255
  
  //#define BEEPER_PIN       PD13  // pin 60 (Servo PWM output 5V/GND on Board V0G+) made for BL-Touch sensor
                                   // Can drive a PC Buzzer, if connected between PWM and 5V pins
  
  #define LED_PIN            PC2   // pin 17
  
  //
  // PWM for a servo probe
  // Other servo devices are not supported on this board!
  //
  #if HAS_Z_SERVO_PROBE
    #define SERVO0_PIN       PD13  // Open drain PWM pin on the V0G (GND or floating 5V)
    #define SERVO0_PWM_OD          // Comment this if using PE5
  
    //#define SERVO0_PIN     PE5   // Pulled up PWM pin on the V08 (3.3V or 0)
    //#undef Z_MAX_PIN             // Uncomment if using ZMAX connector (PE5)
  #endif
  
  /**
   * Note: Alfawise screens use various TFT controllers. Supported screens
   * are based on the ILI9341, ILI9328 and ST7798V. Define init sequences for
   * other screens in u8g_dev_tft_320x240_upscale_from_128x64.cpp
   *
   * If the screen stays white, disable 'LCD_RESET_PIN' to let the bootloader
   * init the screen.
   *
   * Setting an 'LCD_RESET_PIN' may cause a flicker when entering the LCD menu
   * because Marlin uses the reset as a failsafe to revive a glitchy LCD.
   */
  
  #define LCD_RESET_PIN      PC4   // pin 33
  #define LCD_BACKLIGHT_PIN  PD12  // pin 59
  #define FSMC_CS_PIN        PD7   // pin 88 = FSMC_NE1
  #define FSMC_RS_PIN        PD11  // pin 58 A16 Register. Only one address needed
  
  #define LCD_USE_DMA_FSMC   // Use DMA transfers to send data to the TFT
  #define FSMC_DMA_DEV       DMA2
  #define FSMC_DMA_CHANNEL   DMA_CH5
  
  #define DOGLCD_MOSI        -1  // Prevent auto-define by Conditionals_post.h
  #define DOGLCD_SCK         -1
  
  /**
   * Note: Alfawise U20/U30 boards DON'T use SPI2, as the hardware designer
   * mixed up MOSI and MISO pins. SPI is managed in SW, and needs pins
   * declared below.
   */
  #if ENABLED(TOUCH_BUTTONS)
    #define TOUCH_CS_PIN     PB12  // pin 51 SPI2_NSS
    #define TOUCH_SCK_PIN    PB13  // pin 52
    #define TOUCH_MOSI_PIN   PB14  // pin 53
    #define TOUCH_MISO_PIN   PB15  // pin 54
    #define TOUCH_INT_PIN    PC6   // pin 63 (PenIRQ coming from ADS7843)
  #endif
  
  //
  // Persistent Storage
  // If no option is selected below the SD Card will be used
  //
  //#define SPI_EEPROM
  #define FLASH_EEPROM_EMULATION
  
  #undef E2END
  #if ENABLED(SPI_EEPROM)
    // SPI1 EEPROM Winbond W25Q64 (8MB/64Mbits)
    #define SPI_CHAN_EEPROM1   1
    #define SPI_EEPROM1_CS     PC5   // pin 34
    #define EEPROM_SCK  BOARD_SPI1_SCK_PIN    // PA5 pin 30
    #define EEPROM_MISO BOARD_SPI1_MISO_PIN   // PA6 pin 31
    #define EEPROM_MOSI BOARD_SPI1_MOSI_PIN   // PA7 pin 32
    #define EEPROM_PAGE_SIZE   0x1000U        // 4KB (from datasheet)
    #define E2END ((16 * EEPROM_PAGE_SIZE)-1) // Limit to 64KB for now...
  #elif ENABLED(FLASH_EEPROM_EMULATION)
    // SoC Flash (framework-arduinoststm32-maple/STM32F1/libraries/EEPROM/EEPROM.h)
    #define EEPROM_START_ADDRESS (0x8000000UL + (512 * 1024) - 2 * EEPROM_PAGE_SIZE)
    #define EEPROM_PAGE_SIZE     (0x800U)     // 2KB, but will use 2x more (4KB)
    #define E2END (EEPROM_PAGE_SIZE - 1)
  #else
    #define E2END (0x7FFU) // On SD, Limit to 2KB, require this amount of RAM
  #endif
  