150 lines
3.6 KiB
C
150 lines
3.6 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) 2011-2012 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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#include <avr/pgmspace.h>
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#include "config.h"
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#include "serial.h"
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#include "settings.h"
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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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//
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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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//
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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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//
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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 print_uint8_base2(uint8_t n)
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{
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unsigned char buf[8];
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uint8_t i = 0;
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for (; i < 8; i++) {
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buf[i] = n & 1;
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n >>= 1;
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}
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for (; i > 0; i--)
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serial_write('0' + buf[i - 1]);
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}
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static void print_uint32_base10(unsigned long n)
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{
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unsigned char buf[10];
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uint8_t 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 % 10 + '0';
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n /= 10;
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}
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for (; i > 0; i--)
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serial_write(buf[i-1]);
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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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print_uint32_base10(n);
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}
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// Convert float to string by immediately converting to a long integer, which contains
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// more digits than a float. Number of decimal places, which are tracked by a counter,
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// may be set by the user. The integer is then efficiently converted to a string.
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// NOTE: AVR '%' and '/' integer operations are very efficient. Bitshifting speed-up
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// techniques are actually just slightly slower. Found this out the hard way.
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void printFloat(float 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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uint8_t decimals = settings.decimal_places;
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while (decimals >= 2) { // Quickly convert values expected to be E0 to E-4.
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n *= 100;
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decimals -= 2;
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}
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if (decimals) { n *= 10; }
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n += 0.5; // Add rounding factor. Ensures carryover through entire value.
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// Generate digits backwards and store in string.
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unsigned char buf[10];
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uint8_t i = 0;
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uint32_t a = (long)n;
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buf[settings.decimal_places] = '.'; // Place decimal point, even if decimal places are zero.
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while(a > 0) {
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if (i == settings.decimal_places) { i++; } // Skip decimal point location
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buf[i++] = (a % 10) + '0'; // Get digit
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a /= 10;
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}
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while (i < settings.decimal_places) {
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buf[i++] = '0'; // Fill in zeros to decimal point for (n < 1)
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}
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if (i == settings.decimal_places) { // Fill in leading zero, if needed.
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i++;
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buf[i++] = '0';
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}
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// Print the generated string.
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for (; i > 0; i--)
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serial_write(buf[i-1]);
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}
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