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#include "Arduino.h"
#include "HardwareSerial.h"
#include "HardwareSerial_private.h"
// Each HardwareSerial is defined in its own file, sine the linker pulls
// in the entire file when any element inside is used. --gc-sections can
// additionally cause unused symbols to be dropped, but ISRs have the
// "used" attribute so are never dropped and they keep the
// HardwareSerial instance in as well. Putting each instance in its own
// file prevents the linker from pulling in any unused instances in the
// first place.
#if defined(HAVE_HWSERIAL2)
#if defined(USART_RX_vect)
ISR(USART_RX_vect)
#elif defined(USART2_RX_vect)
ISR(USART2_RX_vect)
#elif defined(USART_RXC_vect)
ISR(USART_RXC_vect) // ATmega8
#else
#error "Don't know what the Data Received vector is called for the first UART"
#endif
{
Serial2._rx_complete_irq();
}
#if defined(UART2_UDRE_vect)
ISR(UART2_UDRE_vect)
#elif defined(UART_UDRE_vect)
ISR(UART_UDRE_vect)
#elif defined(USART2_UDRE_vect)
ISR(USART2_UDRE_vect)
#elif defined(USART_UDRE_vect)
ISR(USART_UDRE_vect)
#else
#error "Don't know what the Data Register Empty vector is called for the first UART"
#endif
{
Serial2._tx_udr_empty_irq();
}
#if defined(UBRRH) && defined(UBRRL)
HardwareSerial Serial2(&UBRRH, &UBRRL, &UCSRA, &UCSRB, &UCSRC, &UDR);
#else
HardwareSerial Serial2(&UBRR2H, &UBRR2L, &UCSR2A, &UCSR2B, &UCSR2C, &UDR2);
#endif
// Function that can be weakly referenced by serialEventRun to prevent
// pulling in this file if it's not otherwise used.
bool Serial2_available() {
return Serial2.available();
}
#endif // HAVE_HWSERIAL2
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