/**
 * 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 <https://www.gnu.org/licenses/>.
 *
 */
#pragma once

#include "tft_lvgl_configuration.h"

#if ENABLED(USE_WIFI_FUNCTION)

#if SERIAL_PORT_2 != -1
  #error "SERIAL_PORT_2 must be set to -1 with HAS_TFT_LVGL_UI and USE_WIFI_FUNCTION."
#endif

#define WIFI_BAUDRATE          115200
#define WIFI_UPLOAD_BAUDRATE  1958400
#define USART_SAFE_INSERT

#define WIFI_RX_BUF_SIZE  (1024+1)

#include <libmaple/libmaple_types.h>
#include <libmaple/usart.h>
#include <libmaple/libmaple.h>
#include <libmaple/gpio.h>
#include <libmaple/timer.h>
#include <libmaple/ring_buffer.h>

#define DEFINE_WFSERIAL(name, n)\
  WifiSerial name(USART##n, \
  BOARD_USART##n##_TX_PIN,  \
  BOARD_USART##n##_RX_PIN)

class WifiSerial {
  public:
    uint8 wifiRxBuf[WIFI_RX_BUF_SIZE];

  public:
    WifiSerial(struct usart_dev *usart_device, uint8 tx_pin, uint8 rx_pin);

    /* Set up/tear down */
    void begin(uint32 baud);
    void begin(uint32 baud,uint8_t config);
    void end();
    int available(void);
    int read(void);
    int write(uint8_t);
    inline void wifi_usart_irq(usart_reg_map *regs) {
      /* Handling RXNEIE and TXEIE interrupts.
       * RXNE signifies availability of a byte in DR.
       *
       * See table 198 (sec 27.4, p809) in STM document RM0008 rev 15.
       * We enable RXNEIE.
       */
      if ((regs->CR1 & USART_CR1_RXNEIE) && (regs->SR & USART_SR_RXNE)) {
        #ifdef USART_SAFE_INSERT
          /* If the buffer is full and the user defines USART_SAFE_INSERT,
           * ignore new bytes. */
          rb_safe_insert(this->usart_device->rb, (uint8)regs->DR);
        #else
          /* By default, push bytes around in the ring buffer. */
          rb_push_insert(this->usart_device->rb, (uint8)regs->DR);
        #endif
      }
      /* TXE signifies readiness to send a byte to DR. */
      if ((regs->CR1 & USART_CR1_TXEIE) && (regs->SR & USART_SR_TXE)) {
          if (!rb_is_empty(this->usart_device->wb))
              regs->DR=rb_remove(this->usart_device->wb);
          else
              regs->CR1 &= ~((uint32)USART_CR1_TXEIE); // disable TXEIE
      }
    }

    int wifi_rb_is_full(void);

  private:
    struct usart_dev *usart_device;
    uint8 tx_pin;
    uint8 rx_pin;
};

extern WifiSerial WifiSerial1;

#define WIFISERIAL  WifiSerial1

#endif // USE_WIFI_FUNCTION
