nbus-app-driver-for-esp32/src/NbusSlaveDriver/nbus_app_interface_esp32.cpp

#ifdef NBUS_NODE_TYPE_SLAVE

#include "nbus_app_interface_esp32.h"

static NbusLoopEsp32 *_loop_driver;
static bool _in_transmission = false;
static uint32_t _rx_size = 0;

nBusPlatformInterface_t* nbus_platform_init(NbusLoopEsp32 *loop_driver)
{
  #if NBUS_USE_LED
    pinMode(NBUS_LED_PIN, OUTPUT);

    #if NBUS_LED_POLARITY_REVERSED
      digitalWrite(NBUS_LED_PIN, HIGH);
    #else
      digitalWrite(NBUS_LED_PIN, LOW);
    #endif // POLARITY    
  #endif // NBUS_USE_LED

  _loop_driver = loop_driver;
  return &nbus_hw_platform;
}

static inline void uart_send(uint8_t *data, int n)
{  
  _loop_driver->accessStream().write(data, n);
}

static inline void uart_receive(uint8_t *dataNBUS, int n)
{
  _loop_driver->setData(dataNBUS, n);
}

static inline void led_on()
{
#if NBUS_USE_LED
    #if NBUS_LED_POLARITY_REVERSED
        digitalWrite(NBUS_LED_PIN, LOW);
    #else
        digitalWrite(NBUS_LED_PIN, HIGH);
    #endif // POLARITY    
#endif // NBUS_USE_LED
}

static inline void led_off()
{
#if NBUS_USE_LED
    #if NBUS_LED_POLARITY_REVERSED
        digitalWrite(NBUS_LED_PIN, HIGH);
    #else
        digitalWrite(NBUS_LED_PIN, LOW);
    #endif // POLARITY    
#endif // NBUS_USE_LED
}

static inline void led_toggle()
{
#if NBUS_USE_LED
    digitalWrite(NBUS_LED_PIN, !digitalRead(NBUS_LED_PIN));
#endif // NBUS_USE_LED
}

static inline uint32_t get_time()
{
  return millis();
}

static inline void app_delay(uint8_t ms)
{
  delay(ms);
}

static inline uint8_t loop_callback(nBusStateCallbackType_t state_check)
{
  if (state_check == CallbackType_SENSOR)
  {
    return 0;
  }

  if (state_check == CallbackType_UART)
  {
    return 1; 
  }

  return 0;
}

uint8_t read_rx_packet(uint8_t *data, uint8_t *length)
{
  // data buffers are already interconnected
  *length = _rx_size;
  _rx_size = 0;
  return *length > 0;
}

void nbus_platform_loop()
{
  _rx_size = _loop_driver->receiveData();

  if (_in_transmission == false && _loop_driver->isReceiving() == true)
  {
    led_on();
    _in_transmission = true;
  }
  
  if (_in_transmission == true && _loop_driver->isReceiving() == false)
  {
    led_off();
    _in_transmission = false;
  }
}

nBusPlatformInterface_t nbus_hw_platform = {
    uart_receive,
    uart_send,
    led_on,
    led_off,
    led_toggle,
    app_delay,
    get_time,
    loop_callback,
    read_rx_packet
};

#endif // NBUS_NODE_TYPE