/** * Marlin 3D Printer Firmware * Copyright (C) 2016 MarlinFirmware [https://github.com/MarlinFirmware/Marlin] * * Based on Sprinter and grbl. * Copyright (C) 2011 Camiel Gubbels / Erik van der Zalm * * This program is free software: you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation, either version 3 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program. If not, see . * */ /** HardwareSerial.h - Hardware serial library for Wiring Copyright (c) 2006 Nicholas Zambetti. All right reserved. Modified 28 September 2010 by Mark Sproul */ #ifndef MarlinSerial_h #define MarlinSerial_h #include "Marlin.h" #ifndef CRITICAL_SECTION_START #define CRITICAL_SECTION_START unsigned char _sreg = SREG; cli(); #define CRITICAL_SECTION_END SREG = _sreg; #endif #ifndef SERIAL_PORT #define SERIAL_PORT 0 #endif // The presence of the UBRRH register is used to detect a UART. #define UART_PRESENT(port) ((port == 0 && (defined(UBRRH) || defined(UBRR0H))) || \ (port == 1 && defined(UBRR1H)) || (port == 2 && defined(UBRR2H)) || \ (port == 3 && defined(UBRR3H))) // These are macros to build serial port register names for the selected SERIAL_PORT (C preprocessor // requires two levels of indirection to expand macro values properly) #define SERIAL_REGNAME(registerbase,number,suffix) SERIAL_REGNAME_INTERNAL(registerbase,number,suffix) #if SERIAL_PORT == 0 && (!defined(UBRR0H) || !defined(UDR0)) // use un-numbered registers if necessary #define SERIAL_REGNAME_INTERNAL(registerbase,number,suffix) registerbase##suffix #else #define SERIAL_REGNAME_INTERNAL(registerbase,number,suffix) registerbase##number##suffix #endif // Registers used by MarlinSerial class (these are expanded // depending on selected serial port #define M_UCSRxA SERIAL_REGNAME(UCSR,SERIAL_PORT,A) // defines M_UCSRxA to be UCSRnA where n is the serial port number #define M_UCSRxB SERIAL_REGNAME(UCSR,SERIAL_PORT,B) #define M_RXENx SERIAL_REGNAME(RXEN,SERIAL_PORT,) #define M_TXENx SERIAL_REGNAME(TXEN,SERIAL_PORT,) #define M_RXCIEx SERIAL_REGNAME(RXCIE,SERIAL_PORT,) #define M_UDREx SERIAL_REGNAME(UDRE,SERIAL_PORT,) #define M_UDRx SERIAL_REGNAME(UDR,SERIAL_PORT,) #define M_UBRRxH SERIAL_REGNAME(UBRR,SERIAL_PORT,H) #define M_UBRRxL SERIAL_REGNAME(UBRR,SERIAL_PORT,L) #define M_RXCx SERIAL_REGNAME(RXC,SERIAL_PORT,) #define M_USARTx_RX_vect SERIAL_REGNAME(USART,SERIAL_PORT,_RX_vect) #define M_U2Xx SERIAL_REGNAME(U2X,SERIAL_PORT,) #define DEC 10 #define HEX 16 #define OCT 8 #define BIN 2 #define BYTE 0 #ifndef USBCON // Define constants and variables for buffering incoming serial data. We're // using a ring buffer (I think), in which rx_buffer_head is the index of the // location to which to write the next incoming character and rx_buffer_tail // is the index of the location from which to read. // 256 is the max limit due to uint8_t head and tail. Use only powers of 2. (...,16,32,64,128,256) #ifndef RX_BUFFER_SIZE #define RX_BUFFER_SIZE 128 #endif #if !((RX_BUFFER_SIZE == 256) ||(RX_BUFFER_SIZE == 128) ||(RX_BUFFER_SIZE == 64) ||(RX_BUFFER_SIZE == 32) ||(RX_BUFFER_SIZE == 16) ||(RX_BUFFER_SIZE == 8) ||(RX_BUFFER_SIZE == 4) ||(RX_BUFFER_SIZE == 2)) #error RX_BUFFER_SIZE has to be a power of 2 and >= 2 #endif struct ring_buffer { unsigned char buffer[RX_BUFFER_SIZE]; volatile uint8_t head; volatile uint8_t tail; }; #if UART_PRESENT(SERIAL_PORT) extern ring_buffer rx_buffer; #endif class MarlinSerial { //: public Stream public: MarlinSerial(); void begin(long); void end(); int peek(void); int read(void); void flush(void); FORCE_INLINE uint8_t available(void) { CRITICAL_SECTION_START; uint8_t h = rx_buffer.head; uint8_t t = rx_buffer.tail; CRITICAL_SECTION_END; return (uint8_t)(RX_BUFFER_SIZE + h - t) & (RX_BUFFER_SIZE - 1); } FORCE_INLINE void write(uint8_t c) { while (!TEST(M_UCSRxA, M_UDREx)) ; M_UDRx = c; } FORCE_INLINE void checkRx(void) { if (TEST(M_UCSRxA, M_RXCx)) { unsigned char c = M_UDRx; CRITICAL_SECTION_START; uint8_t h = rx_buffer.head; uint8_t i = (uint8_t)(h + 1) & (RX_BUFFER_SIZE - 1); // if we should be storing the received character into the location // just before the tail (meaning that the head would advance to the // current location of the tail), we're about to overflow the buffer // and so we don't write the character or advance the head. if (i != rx_buffer.tail) { rx_buffer.buffer[h] = c; rx_buffer.head = i; } CRITICAL_SECTION_END; } } private: void printNumber(unsigned long, uint8_t); void printFloat(double, uint8_t); public: FORCE_INLINE void write(const char* str) { while (*str) write(*str++); } FORCE_INLINE void write(const uint8_t* buffer, size_t size) { while (size--) write(*buffer++); } FORCE_INLINE void print(const String& s) { for (int i = 0; i < (int)s.length(); i++) write(s[i]); } FORCE_INLINE void print(const char* str) { write(str); } void print(char, int = BYTE); void print(unsigned char, int = BYTE); void print(int, int = DEC); void print(unsigned int, int = DEC); void print(long, int = DEC); void print(unsigned long, int = DEC); void print(double, int = 2); void println(const String& s); void println(const char[]); void println(char, int = BYTE); void println(unsigned char, int = BYTE); void println(int, int = DEC); void println(unsigned int, int = DEC); void println(long, int = DEC); void println(unsigned long, int = DEC); void println(double, int = 2); void println(void); }; extern MarlinSerial customizedSerial; #endif // !USBCON // Use the UART for Bluetooth in AT90USB configurations #if defined(USBCON) && ENABLED(BLUETOOTH) extern HardwareSerial bluetoothSerial; #endif #endif