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