105 lines
2.2 KiB
C
105 lines
2.2 KiB
C
/*
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print.c - Functions for formatting output strings
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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 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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#include <math.h>
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#include <avr/pgmspace.h>
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#include "serial.h"
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#ifndef DECIMAL_PLACES
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#define DECIMAL_PLACES 3
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#define DECIMAL_MULTIPLIER 10*10*10
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#endif
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void printString(const char *s)
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{
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while (*s)
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serial_write(*s++);
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}
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// Print a string stored in PGM-memory
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void printPgmString(const char *s)
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{
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char c;
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while ((c = pgm_read_byte_near(s++)))
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serial_write(c);
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}
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void printIntegerInBase(unsigned long n, unsigned long base)
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{
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unsigned char buf[8 * sizeof(long)]; // Assumes 8-bit chars.
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unsigned long i = 0;
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if (n == 0) {
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serial_write('0');
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return;
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}
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while (n > 0) {
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buf[i++] = n % base;
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n /= base;
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}
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for (; i > 0; i--)
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serial_write(buf[i - 1] < 10 ?
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'0' + buf[i - 1] :
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'A' + buf[i - 1] - 10);
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}
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void printInteger(long n)
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{
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if (n < 0) {
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serial_write('-');
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n = -n;
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}
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printIntegerInBase(n, 10);
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}
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// A very simple
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void printFloat(double n)
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{
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if (n < 0) {
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serial_write('-');
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n = -n;
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}
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n += 0.5/DECIMAL_MULTIPLIER; // Add rounding factor
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long integer_part;
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integer_part = (int)n;
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printIntegerInBase(integer_part,10);
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serial_write('.');
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n -= integer_part;
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int decimals = DECIMAL_PLACES;
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uint8_t decimal_part;
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while(decimals-- > 0) {
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n *= 10;
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decimal_part = (int) n;
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serial_write('0'+decimal_part);
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n -= decimal_part;
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}
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}
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