56 lines
1.6 KiB
C++
56 lines
1.6 KiB
C++
#include "Arduino.h"
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#include "HardwareSerial.h"
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#include "HardwareSerial_private.h"
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// Each HardwareSerial is defined in its own file, sine the linker pulls
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// in the entire file when any element inside is used. --gc-sections can
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// additionally cause unused symbols to be dropped, but ISRs have the
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// "used" attribute so are never dropped and they keep the
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// HardwareSerial instance in as well. Putting each instance in its own
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// file prevents the linker from pulling in any unused instances in the
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// first place.
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#if defined(HAVE_HWSERIAL0)
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#if defined(USART_RX_vect)
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ISR(USART_RX_vect)
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#elif defined(USART0_RX_vect)
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ISR(USART0_RX_vect)
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#elif defined(USART_RXC_vect)
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ISR(USART_RXC_vect) // ATmega8
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#else
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#error "Don't know what the Data Received vector is called for the first UART"
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#endif
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{
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Serial._rx_complete_irq();
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}
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#if defined(UART0_UDRE_vect)
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ISR(UART0_UDRE_vect)
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#elif defined(UART_UDRE_vect)
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ISR(UART_UDRE_vect)
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#elif defined(USART0_UDRE_vect)
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ISR(USART0_UDRE_vect)
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#elif defined(USART_UDRE_vect)
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ISR(USART_UDRE_vect)
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#else
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#error "Don't know what the Data Register Empty vector is called for the first UART"
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#endif
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{
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Serial._tx_udr_empty_irq();
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}
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#if defined(UBRRH) && defined(UBRRL)
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HardwareSerial Serial(&UBRRH, &UBRRL, &UCSRA, &UCSRB, &UCSRC, &UDR);
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#else
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HardwareSerial Serial(&UBRR0H, &UBRR0L, &UCSR0A, &UCSR0B, &UCSR0C, &UDR0);
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#endif
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// Function that can be weakly referenced by serialEventRun to prevent
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// pulling in this file if it's not otherwise used.
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bool Serial0_available() {
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return Serial.available();
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}
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#endif // HAVE_HWSERIAL0
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