60 lines
1.6 KiB
C
60 lines
1.6 KiB
C
/*
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serial.c - Low level functions for sending and recieving bytes via the serial port
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Part of Grbl
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Copyright (c) 2009-2011 Simen Svale Skogsrud
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Copyright (c) 2011-2012 Sungeun K. Jeon
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Grbl 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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Grbl 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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You should have received a copy of the GNU General Public License
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along with Grbl. If not, see <http://www.gnu.org/licenses/>.
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*/
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/* This code was initially inspired by the wiring_serial module by David A. Mellis which
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used to be a part of the Arduino project. */
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#ifndef serial_h
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#define serial_h
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#include "nuts_bolts.h"
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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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#ifndef TX_BUFFER_SIZE
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#define TX_BUFFER_SIZE 64
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#endif
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#define SERIAL_NO_DATA 0xff
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#ifdef ENABLE_XONXOFF
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#define RX_BUFFER_FULL 96 // XOFF high watermark
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#define RX_BUFFER_LOW 64 // XON low watermark
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#define SEND_XOFF 1
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#define SEND_XON 2
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#define XOFF_SENT 3
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#define XON_SENT 4
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#define XOFF_CHAR 0x13
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#define XON_CHAR 0x11
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#endif
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void serial_init();
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void serial_write(uint8_t data);
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uint8_t serial_read();
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// Reset and empty data in read buffer. Used by e-stop and reset.
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void serial_reset_read_buffer();
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#endif
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