common/print.c

   1 /* Copyright 2012 Jun Wako <wakojun@gmail.com> */
   2 /* Very basic print functions, intended to be used with usb_debug_only.c
   3  * http://www.pjrc.com/teensy/
   4  * Copyright (c) 2008 PJRC.COM, LLC
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a copy
   7  * of this software and associated documentation files (the "Software"), to deal
   8  * in the Software without restriction, including without limitation the rights
   9  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  10  * copies of the Software, and to permit persons to whom the Software is
  11  * furnished to do so, subject to the following conditions:
  12  *
  13  * The above copyright notice and this permission notice shall be included in
  14  * all copies or substantial portions of the Software.
  15  *
  16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  18  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  19  * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  20  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  21  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  22  * THE SOFTWARE.
  23  */
  24
  25 #include <stdio.h>
  26 #include <avr/io.h>
  27 #include <avr/pgmspace.h>
  28 #include "print.h"
  29 #define sendchar(c)    do { if (print_enable && print_sendchar_func) (print_sendchar_func)(c); } while (0)
  30
  31
  32 int8_t (*print_sendchar_func)(uint8_t) = NULL;
  33 bool print_enable = false;
  34
  35 /* print string stored in data memory(SRAM)
  36  *     print_P("hello world");
  37  * This consumes precious SRAM memory space for string.
  38  */
  39 void print_S(const char *s)
  40 {
  41     uint8_t c;
  42     while (1) {
  43         c = *s++;
  44         if (!c) break;
  45         if (c == '\n') sendchar('\r');
  46         sendchar(c);
  47     }
  48 }
  49
  50 /* print string stored in program memory(FLASH)
  51  *     print_P(PSTR("hello world");
  52  * This consumes relatively abundant FLASH memory area not SRAM.
  53  */
  54 void print_P(const char *s)
  55 {
  56     uint8_t c;
  57     while (1) {
  58         c = pgm_read_byte(s++);
  59         if (!c) break;
  60         if (c == '\n') sendchar('\r');
  61         sendchar(c);
  62     }
  63 }
  64
  65 static inline
  66 void print_hex4(uint8_t data)
  67 {
  68     sendchar(data + ((data < 10) ? '0' : 'A' - 10));
  69 }
  70
  71 void print_hex8(uint8_t data)
  72 {
  73     print_hex4(data>>4);
  74     print_hex4(data&0x0F);
  75 }
  76
  77 void print_hex16(uint16_t data)
  78 {
  79     print_hex8(data>>8);
  80     print_hex8(data);
  81 }
  82
  83 void print_hex32(uint32_t data)
  84 {
  85     print_hex16(data>>16);
  86     print_hex16(data);
  87 }
  88
  89 void print_dec8(uint8_t data)
  90 {
  91     if (data/100) sendchar('0' + (data/100));
  92     if (data/100 || data%100/10) sendchar('0' + (data%100/10));
  93     sendchar('0' + (data%10));
  94 }
  95
  96 void print_dec16(uint16_t data)
  97 {
  98     // TODO
  99 }
 100
 101 void print_dec32(uint32_t data)
 102 {
 103     // TODO
 104 }
 105
 106 void print_bin(uint8_t data)
 107 {
 108     for (int i = 7; i >= 0; i--) {
 109         sendchar((data & (1<<i)) ? '1' : '0');
 110     }
 111 }
 112
 113 void print_bin16(uint16_t data)
 114 {
 115     print_bin8(data>>8);
 116     print_bin8(data);
 117 }
 118
 119 void print_bin32(uint32_t data)
 120 {
 121     print_bin8(data>>24);
 122     print_bin8(data>>16);
 123     print_bin8(data>>8);
 124     print_bin8(data);
 125 }
 126
 127 void print_bin_reverse8(uint8_t data)
 128 {
 129     for (int i = 0; i < 8; i++) {
 130         sendchar((data & (1<<i)) ? '1' : '0');
 131     }
 132 }
 133
 134 void print_bin_reverse16(uint16_t data)
 135 {
 136     print_bin_reverse8(data);
 137     print_bin_reverse8(data>>8);
 138 }
 139
 140 void print_bin_reverse32(uint32_t data)
 141 {
 142     print_bin_reverse8(data);
 143     print_bin_reverse8(data>>8);
 144     print_bin_reverse8(data>>16);
 145     print_bin_reverse8(data>>24);
 146 }