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-rw-r--r--cores/arduino/HardwareSerial2.cpp54
1 files changed, 54 insertions, 0 deletions
diff --git a/cores/arduino/HardwareSerial2.cpp b/cores/arduino/HardwareSerial2.cpp
new file mode 100644
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--- /dev/null
+++ b/cores/arduino/HardwareSerial2.cpp
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+#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