diff options
Diffstat (limited to 'cores/arduino/HardwareSerial.cpp')
| -rw-r--r-- | cores/arduino/HardwareSerial.cpp | 27 |
1 files changed, 26 insertions, 1 deletions
diff --git a/cores/arduino/HardwareSerial.cpp b/cores/arduino/HardwareSerial.cpp index db6b149..ee77b45 100644 --- a/cores/arduino/HardwareSerial.cpp +++ b/cores/arduino/HardwareSerial.cpp @@ -50,6 +50,10 @@ struct ring_buffer volatile int tail; }; +#if defined(USBCON) + ring_buffer rx_buffer = { { 0 }, 0, 0}; + ring_buffer tx_buffer = { { 0 }, 0, 0}; +#endif #if defined(UBRRH) || defined(UBRR0H) ring_buffer rx_buffer = { { 0 }, 0, 0 }; ring_buffer tx_buffer = { { 0 }, 0, 0 }; @@ -81,6 +85,15 @@ inline void store_char(unsigned char c, ring_buffer *buffer) } } +#if defined(__AVR_ATmega32U4__) + void serialEvent() __attribute__((weak)); + void serialEvent() {} + SIGNAL(USART1_RX_vect) { + unsigned char c = UDR1; + store_char(c, &rx_buffer); + serialEvent(); + } +#else #if !defined(USART_RX_vect) && !defined(SIG_USART0_RECV) && \ !defined(SIG_UART0_RECV) && !defined(USART0_RX_vect) && \ !defined(SIG_UART_RECV) @@ -150,8 +163,19 @@ inline void store_char(unsigned char c, ring_buffer *buffer) #elif defined(SIG_USART3_RECV) #error SIG_USART3_RECV #endif +#endif - +#if defined(__AVR_ATmega32U4__) +ISR(USART1_UDRE_vect) { + if (tx_buffer.head == tx_buffer.tail) { + cbi(UCSR1B, UDRIE1); + } else { + unsigned char c = tx_buffer.buffer[tx_buffer.tail]; + tx_buffer.tail = (tx_buffer.tail + 1) % SERIAL_BUFFER_SIZE; + UDR1 = c; + } +} +#else #if !defined(UART0_UDRE_vect) && !defined(UART_UDRE_vect) && !defined(USART0_UDRE_vect) && !defined(USART_UDRE_vect) #error Don't know what the Data Register Empty vector is called for the first UART #else @@ -205,6 +229,7 @@ ISR(USART1_UDRE_vect) } } #endif +#endif #ifdef USART2_UDRE_vect ISR(USART2_UDRE_vect) |