65 lines
2.0 KiB
C
65 lines
2.0 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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The MIT License (MIT)
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GRBL(tm) - Embedded CNC g-code interpreter and motion-controller
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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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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files (the "Software"), to deal
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in the Software without restriction, including without limitation the rights
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to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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copies of the Software, and to permit persons to whom the Software is
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furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in
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all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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THE SOFTWARE.
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*/
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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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