92 lines
2.0 KiB
C
92 lines
2.0 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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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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#define DECIMAL_PLACES 4
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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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// Prints a single digit of any base up to 36. 0..9 prints as
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// '0'..'9' while 10..35 prints as 'a'..'z'
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void printDigit(uint8_t value) {
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serial_write(value < 10 ?
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'0' + value :
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'a' + value - 10);
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}
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void printIntegerInBase(unsigned long n, unsigned long base)
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{
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if (n == 0) {
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printDigit(0);
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return;
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}
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while (n > 0) {
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printDigit(n % base);
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n /= base;
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}
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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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double integer_part, fractional_part, decimal_part;
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fractional_part = modf(n, &integer_part);
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printInteger(integer_part);
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serial_write('.');
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fractional_part *= 10;
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int decimals = DECIMAL_PLACES;
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while(decimals > 0) {
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decimal_part = floor(fractional_part);
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printDigit(decimal_part);
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fractional_part -= decimal_part;
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fractional_part *= 10;
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}
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}
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