diff options
Diffstat (limited to 'cores/arduino/HardwareSerial2.cpp')
-rw-r--r-- | cores/arduino/HardwareSerial2.cpp | 54 |
1 files changed, 54 insertions, 0 deletions
diff --git a/cores/arduino/HardwareSerial2.cpp b/cores/arduino/HardwareSerial2.cpp new file mode 100644 index 0000000..2c448f9 --- /dev/null +++ b/cores/arduino/HardwareSerial2.cpp @@ -0,0 +1,54 @@ +#include "Arduino.h" +#include "HardwareSerial.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 |