VFD modular clock firmware
Dependencies: DipCortex-EEprom RTC flw mbed
VFDDisplay.cpp@9:4bb5c30a475f, 2015-02-20 (annotated)
- Committer:
- Backstrom
- Date:
- Fri Feb 20 10:08:50 2015 +0000
- Revision:
- 9:4bb5c30a475f
- Parent:
- 0:f6e68b4ce169
Update flw library.
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
Backstrom | 0:f6e68b4ce169 | 1 | /* |
Backstrom | 0:f6e68b4ce169 | 2 | * VFD Modular Clock - mbed |
Backstrom | 0:f6e68b4ce169 | 3 | * (C) 2011-14 Akafugu Corporation |
Backstrom | 0:f6e68b4ce169 | 4 | * |
Backstrom | 0:f6e68b4ce169 | 5 | * This program is free software; you can redistribute it and/or modify it under the |
Backstrom | 0:f6e68b4ce169 | 6 | * terms of the GNU General Public License as published by the Free Software |
Backstrom | 0:f6e68b4ce169 | 7 | * Foundation; either version 2 of the License, or (at your option) any later |
Backstrom | 0:f6e68b4ce169 | 8 | * version. |
Backstrom | 0:f6e68b4ce169 | 9 | * |
Backstrom | 0:f6e68b4ce169 | 10 | * This program is distributed in the hope that it will be useful, but WITHOUT ANY |
Backstrom | 0:f6e68b4ce169 | 11 | * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A |
Backstrom | 0:f6e68b4ce169 | 12 | * PARTICULAR PURPOSE. See the GNU General Public License for more details. |
Backstrom | 0:f6e68b4ce169 | 13 | * |
Backstrom | 0:f6e68b4ce169 | 14 | */ |
Backstrom | 0:f6e68b4ce169 | 15 | |
Backstrom | 0:f6e68b4ce169 | 16 | #include "VFDDisplay.h" |
Backstrom | 0:f6e68b4ce169 | 17 | #include <stdarg.h> |
Backstrom | 0:f6e68b4ce169 | 18 | |
Backstrom | 0:f6e68b4ce169 | 19 | #define sbi(a, b) (a) |= (1 << (b)) |
Backstrom | 0:f6e68b4ce169 | 20 | #define cbi(a, b) (a) &= ~(1 << (b)) |
Backstrom | 0:f6e68b4ce169 | 21 | |
Backstrom | 0:f6e68b4ce169 | 22 | uint8_t calculate_segments_7(uint8_t character); |
Backstrom | 0:f6e68b4ce169 | 23 | |
Backstrom | 0:f6e68b4ce169 | 24 | VFDDisplay::VFDDisplay(PinName data, PinName clock, PinName latch, PinName blank, uint8_t digits) |
Backstrom | 0:f6e68b4ce169 | 25 | : m_mode(Long) |
Backstrom | 0:f6e68b4ce169 | 26 | , m_blink_mode(Full) |
Backstrom | 0:f6e68b4ce169 | 27 | , m_data(data) |
Backstrom | 0:f6e68b4ce169 | 28 | , m_clock(clock) |
Backstrom | 0:f6e68b4ce169 | 29 | , m_latch(latch) |
Backstrom | 0:f6e68b4ce169 | 30 | , m_blank(blank) |
Backstrom | 0:f6e68b4ce169 | 31 | , m_digits(digits) |
Backstrom | 0:f6e68b4ce169 | 32 | , m_multiplex_counter(0) |
Backstrom | 0:f6e68b4ce169 | 33 | , m_position(0) |
Backstrom | 0:f6e68b4ce169 | 34 | , m_scroll_offset(0) |
Backstrom | 0:f6e68b4ce169 | 35 | , m_message_length(0) |
Backstrom | 0:f6e68b4ce169 | 36 | , m_blink(false) |
Backstrom | 0:f6e68b4ce169 | 37 | , m_display_on(true) |
Backstrom | 0:f6e68b4ce169 | 38 | , m_brightness(10) |
Backstrom | 0:f6e68b4ce169 | 39 | { |
Backstrom | 0:f6e68b4ce169 | 40 | //m_blank.period_ms(1); |
Backstrom | 0:f6e68b4ce169 | 41 | //m_blank = 0.0; |
Backstrom | 0:f6e68b4ce169 | 42 | m_blank = 0; |
Backstrom | 0:f6e68b4ce169 | 43 | } |
Backstrom | 0:f6e68b4ce169 | 44 | |
Backstrom | 0:f6e68b4ce169 | 45 | void VFDDisplay::cls() |
Backstrom | 0:f6e68b4ce169 | 46 | { |
Backstrom | 0:f6e68b4ce169 | 47 | memset(m_buffer, ' ', MESSAGE_LIMIT); |
Backstrom | 0:f6e68b4ce169 | 48 | memset(m_char_buffer, ' ', MESSAGE_LIMIT); |
Backstrom | 0:f6e68b4ce169 | 49 | memset(m_dot_buffer, ' ', MESSAGE_LIMIT); |
Backstrom | 0:f6e68b4ce169 | 50 | m_position = 0; |
Backstrom | 0:f6e68b4ce169 | 51 | m_scroll_offset = 0; |
Backstrom | 0:f6e68b4ce169 | 52 | m_message_length = 0; |
Backstrom | 0:f6e68b4ce169 | 53 | } |
Backstrom | 0:f6e68b4ce169 | 54 | |
Backstrom | 0:f6e68b4ce169 | 55 | void VFDDisplay::setPosition(uint8_t pos) |
Backstrom | 0:f6e68b4ce169 | 56 | { |
Backstrom | 0:f6e68b4ce169 | 57 | m_position = pos; |
Backstrom | 0:f6e68b4ce169 | 58 | if (m_position >= MESSAGE_LIMIT) |
Backstrom | 0:f6e68b4ce169 | 59 | m_position = MESSAGE_LIMIT-1; |
Backstrom | 0:f6e68b4ce169 | 60 | } |
Backstrom | 0:f6e68b4ce169 | 61 | |
Backstrom | 0:f6e68b4ce169 | 62 | // Write 8 bits to HV5812 driver |
Backstrom | 0:f6e68b4ce169 | 63 | void VFDDisplay::writeHV5812(uint8_t data) |
Backstrom | 0:f6e68b4ce169 | 64 | { |
Backstrom | 0:f6e68b4ce169 | 65 | // shift out MSB first |
Backstrom | 0:f6e68b4ce169 | 66 | for (uint8_t i = 0; i < 8; i++) { |
Backstrom | 0:f6e68b4ce169 | 67 | if (!!(data & (1 << (7 - i)))) |
Backstrom | 0:f6e68b4ce169 | 68 | m_data = 1; |
Backstrom | 0:f6e68b4ce169 | 69 | else |
Backstrom | 0:f6e68b4ce169 | 70 | m_data = 0; |
Backstrom | 0:f6e68b4ce169 | 71 | |
Backstrom | 0:f6e68b4ce169 | 72 | m_clock = 1; |
Backstrom | 0:f6e68b4ce169 | 73 | m_clock = 0; |
Backstrom | 0:f6e68b4ce169 | 74 | } |
Backstrom | 0:f6e68b4ce169 | 75 | } |
Backstrom | 0:f6e68b4ce169 | 76 | |
Backstrom | 0:f6e68b4ce169 | 77 | const uint32_t BLINK_OFF_TIMER = 200; |
Backstrom | 0:f6e68b4ce169 | 78 | const uint32_t BLINK_ON_TIMER = 350; |
Backstrom | 0:f6e68b4ce169 | 79 | volatile uint32_t blink_countdown = BLINK_ON_TIMER; |
Backstrom | 0:f6e68b4ce169 | 80 | |
Backstrom | 0:f6e68b4ce169 | 81 | extern DigitalOut led; |
Backstrom | 0:f6e68b4ce169 | 82 | |
Backstrom | 0:f6e68b4ce169 | 83 | void VFDDisplay::multiplexTick() |
Backstrom | 0:f6e68b4ce169 | 84 | { |
Backstrom | 0:f6e68b4ce169 | 85 | char d; |
Backstrom | 0:f6e68b4ce169 | 86 | |
Backstrom | 0:f6e68b4ce169 | 87 | if (m_reverse_display) |
Backstrom | 0:f6e68b4ce169 | 88 | d = m_char_buffer[m_digits - m_multiplex_counter - 1 + m_scroll_offset]; |
Backstrom | 0:f6e68b4ce169 | 89 | else |
Backstrom | 0:f6e68b4ce169 | 90 | d = m_char_buffer[m_multiplex_counter + m_scroll_offset]; |
Backstrom | 0:f6e68b4ce169 | 91 | |
Backstrom | 0:f6e68b4ce169 | 92 | // fixme: does not work properly when scrolling |
Backstrom | 0:f6e68b4ce169 | 93 | if (m_dot_buffer[m_multiplex_counter + m_scroll_offset - 1] == '.') |
Backstrom | 0:f6e68b4ce169 | 94 | setDot(m_multiplex_counter, true); |
Backstrom | 0:f6e68b4ce169 | 95 | else |
Backstrom | 0:f6e68b4ce169 | 96 | setDot(m_multiplex_counter, false); |
Backstrom | 0:f6e68b4ce169 | 97 | |
Backstrom | 0:f6e68b4ce169 | 98 | if (m_blink) { |
Backstrom | 0:f6e68b4ce169 | 99 | blink_countdown--; |
Backstrom | 0:f6e68b4ce169 | 100 | |
Backstrom | 0:f6e68b4ce169 | 101 | if (blink_countdown == 0) { |
Backstrom | 0:f6e68b4ce169 | 102 | m_display_on = !m_display_on; |
Backstrom | 0:f6e68b4ce169 | 103 | |
Backstrom | 0:f6e68b4ce169 | 104 | if (m_display_on) |
Backstrom | 0:f6e68b4ce169 | 105 | blink_countdown = BLINK_ON_TIMER; |
Backstrom | 0:f6e68b4ce169 | 106 | else |
Backstrom | 0:f6e68b4ce169 | 107 | blink_countdown = BLINK_OFF_TIMER; |
Backstrom | 0:f6e68b4ce169 | 108 | } |
Backstrom | 0:f6e68b4ce169 | 109 | } |
Backstrom | 0:f6e68b4ce169 | 110 | |
Backstrom | 0:f6e68b4ce169 | 111 | handleBlink(d); |
Backstrom | 0:f6e68b4ce169 | 112 | |
Backstrom | 0:f6e68b4ce169 | 113 | m_multiplex_counter++; |
Backstrom | 0:f6e68b4ce169 | 114 | if (m_multiplex_counter > m_multiplex_limit) |
Backstrom | 0:f6e68b4ce169 | 115 | m_multiplex_counter = 0; |
Backstrom | 0:f6e68b4ce169 | 116 | } |
Backstrom | 0:f6e68b4ce169 | 117 | |
Backstrom | 0:f6e68b4ce169 | 118 | int VFDDisplay::printf(const char* format, ...) |
Backstrom | 0:f6e68b4ce169 | 119 | { |
Backstrom | 0:f6e68b4ce169 | 120 | va_list ap; |
Backstrom | 0:f6e68b4ce169 | 121 | va_start(ap, format); |
Backstrom | 0:f6e68b4ce169 | 122 | int ret = vsnprintf(m_buffer, MESSAGE_LIMIT, format, ap); |
Backstrom | 0:f6e68b4ce169 | 123 | va_end(ap); |
Backstrom | 0:f6e68b4ce169 | 124 | |
Backstrom | 0:f6e68b4ce169 | 125 | // post-processing for seamless dot support |
Backstrom | 0:f6e68b4ce169 | 126 | // splits buffer into two: one that contains characters |
Backstrom | 0:f6e68b4ce169 | 127 | // and one that contains dots |
Backstrom | 0:f6e68b4ce169 | 128 | uint8_t pos = 0; |
Backstrom | 0:f6e68b4ce169 | 129 | |
Backstrom | 0:f6e68b4ce169 | 130 | char* temp = m_buffer; |
Backstrom | 0:f6e68b4ce169 | 131 | |
Backstrom | 0:f6e68b4ce169 | 132 | while (*temp) { |
Backstrom | 0:f6e68b4ce169 | 133 | if (*temp == '.') { |
Backstrom | 0:f6e68b4ce169 | 134 | if (pos > 0) m_dot_buffer[pos-1] = '.'; |
Backstrom | 0:f6e68b4ce169 | 135 | temp++; |
Backstrom | 0:f6e68b4ce169 | 136 | } |
Backstrom | 0:f6e68b4ce169 | 137 | else { |
Backstrom | 0:f6e68b4ce169 | 138 | m_dot_buffer[pos] = ' '; |
Backstrom | 0:f6e68b4ce169 | 139 | m_char_buffer[pos++] = *temp; |
Backstrom | 0:f6e68b4ce169 | 140 | temp++; |
Backstrom | 0:f6e68b4ce169 | 141 | } |
Backstrom | 0:f6e68b4ce169 | 142 | } |
Backstrom | 0:f6e68b4ce169 | 143 | |
Backstrom | 0:f6e68b4ce169 | 144 | /* |
Backstrom | 0:f6e68b4ce169 | 145 | for (uint8_t i = 0; i < strlen(m_buffer); i++) { |
Backstrom | 0:f6e68b4ce169 | 146 | char c = m_buffer[i]; |
Backstrom | 0:f6e68b4ce169 | 147 | |
Backstrom | 0:f6e68b4ce169 | 148 | if (c == '.') { |
Backstrom | 0:f6e68b4ce169 | 149 | m_dot_buffer[pos-1] = '.'; |
Backstrom | 0:f6e68b4ce169 | 150 | //m_char_buffer[pos++] = c; |
Backstrom | 0:f6e68b4ce169 | 151 | i++; |
Backstrom | 0:f6e68b4ce169 | 152 | } |
Backstrom | 0:f6e68b4ce169 | 153 | else { |
Backstrom | 0:f6e68b4ce169 | 154 | m_dot_buffer[pos] = ' '; |
Backstrom | 0:f6e68b4ce169 | 155 | m_char_buffer[pos++] = c; |
Backstrom | 0:f6e68b4ce169 | 156 | } |
Backstrom | 0:f6e68b4ce169 | 157 | } |
Backstrom | 0:f6e68b4ce169 | 158 | */ |
Backstrom | 0:f6e68b4ce169 | 159 | |
Backstrom | 0:f6e68b4ce169 | 160 | m_dot_buffer[pos] = 0; |
Backstrom | 0:f6e68b4ce169 | 161 | m_char_buffer[pos] = 0; |
Backstrom | 0:f6e68b4ce169 | 162 | |
Backstrom | 0:f6e68b4ce169 | 163 | m_position = ret; |
Backstrom | 0:f6e68b4ce169 | 164 | m_message_length = strlen(m_char_buffer); |
Backstrom | 0:f6e68b4ce169 | 165 | |
Backstrom | 0:f6e68b4ce169 | 166 | return ret; |
Backstrom | 0:f6e68b4ce169 | 167 | } |
Backstrom | 0:f6e68b4ce169 | 168 | |
Backstrom | 0:f6e68b4ce169 | 169 | int VFDDisplay::_putc(int c) |
Backstrom | 0:f6e68b4ce169 | 170 | { |
Backstrom | 0:f6e68b4ce169 | 171 | // fixme: support dot buffer |
Backstrom | 0:f6e68b4ce169 | 172 | m_char_buffer[m_position] = c; |
Backstrom | 0:f6e68b4ce169 | 173 | m_buffer[m_position++] = c; |
Backstrom | 0:f6e68b4ce169 | 174 | m_message_length++; |
Backstrom | 0:f6e68b4ce169 | 175 | return 1; |
Backstrom | 0:f6e68b4ce169 | 176 | } |
Backstrom | 0:f6e68b4ce169 | 177 | |
Backstrom | 0:f6e68b4ce169 | 178 | int VFDDisplay::_getc() |
Backstrom | 0:f6e68b4ce169 | 179 | { |
Backstrom | 0:f6e68b4ce169 | 180 | return -1; |
Backstrom | 0:f6e68b4ce169 | 181 | } |
Backstrom | 0:f6e68b4ce169 | 182 | |
Backstrom | 0:f6e68b4ce169 | 183 | void VFDDisplay::scroll(int8_t spaces /*= 1*/) |
Backstrom | 0:f6e68b4ce169 | 184 | { |
Backstrom | 0:f6e68b4ce169 | 185 | m_scroll_offset += spaces; |
Backstrom | 0:f6e68b4ce169 | 186 | //if (m_scroll_offset > MESSAGE_LIMIT - m_digits) |
Backstrom | 0:f6e68b4ce169 | 187 | // m_scroll_offset = 0; |
Backstrom | 0:f6e68b4ce169 | 188 | } |
Backstrom | 0:f6e68b4ce169 | 189 | |
Backstrom | 0:f6e68b4ce169 | 190 | void VFDDisplay::resetScroll() |
Backstrom | 0:f6e68b4ce169 | 191 | { |
Backstrom | 0:f6e68b4ce169 | 192 | m_scroll_offset = 0; |
Backstrom | 0:f6e68b4ce169 | 193 | } |
Backstrom | 0:f6e68b4ce169 | 194 | |
Backstrom | 0:f6e68b4ce169 | 195 | bool VFDDisplay::scrollFinished() |
Backstrom | 0:f6e68b4ce169 | 196 | { |
Backstrom | 0:f6e68b4ce169 | 197 | if (m_scroll_offset > strlen(m_char_buffer)) |
Backstrom | 0:f6e68b4ce169 | 198 | return true; |
Backstrom | 0:f6e68b4ce169 | 199 | return false; |
Backstrom | 0:f6e68b4ce169 | 200 | } |
Backstrom | 0:f6e68b4ce169 | 201 | |
Backstrom | 0:f6e68b4ce169 | 202 | void VFDDisplay::setDot(uint8_t pos, bool on) |
Backstrom | 0:f6e68b4ce169 | 203 | { |
Backstrom | 0:f6e68b4ce169 | 204 | if (on) { |
Backstrom | 0:f6e68b4ce169 | 205 | sbi(m_dots, pos); |
Backstrom | 0:f6e68b4ce169 | 206 | } |
Backstrom | 0:f6e68b4ce169 | 207 | else { |
Backstrom | 0:f6e68b4ce169 | 208 | cbi(m_dots, pos); |
Backstrom | 0:f6e68b4ce169 | 209 | } |
Backstrom | 0:f6e68b4ce169 | 210 | } |
Backstrom | 0:f6e68b4ce169 | 211 | |
Backstrom | 0:f6e68b4ce169 | 212 | void VFDDisplay::toggleTimeMode() |
Backstrom | 0:f6e68b4ce169 | 213 | { |
Backstrom | 0:f6e68b4ce169 | 214 | if (m_mode == Short) m_mode = Extra; |
Backstrom | 0:f6e68b4ce169 | 215 | else if (m_mode == Extra) m_mode = Long; |
Backstrom | 0:f6e68b4ce169 | 216 | else m_mode = Short; |
Backstrom | 0:f6e68b4ce169 | 217 | } |
Backstrom | 0:f6e68b4ce169 | 218 | |
Backstrom | 0:f6e68b4ce169 | 219 | void VFDDisplay::setBrightness(uint8_t brite) |
Backstrom | 0:f6e68b4ce169 | 220 | { |
Backstrom | 0:f6e68b4ce169 | 221 | if (brite > 10) brite = 10; |
Backstrom | 0:f6e68b4ce169 | 222 | m_brightness = brite; |
Backstrom | 0:f6e68b4ce169 | 223 | } |
Backstrom | 0:f6e68b4ce169 | 224 | |
Backstrom | 0:f6e68b4ce169 | 225 | uint8_t VFDDisplay::incBrightness() |
Backstrom | 0:f6e68b4ce169 | 226 | { |
Backstrom | 0:f6e68b4ce169 | 227 | float f = m_blank; |
Backstrom | 0:f6e68b4ce169 | 228 | if (f >= 0.9) f = 0.0; |
Backstrom | 0:f6e68b4ce169 | 229 | f+= 0.1; |
Backstrom | 0:f6e68b4ce169 | 230 | m_blank = f; |
Backstrom | 0:f6e68b4ce169 | 231 | return f*10; |
Backstrom | 0:f6e68b4ce169 | 232 | } |