Andrew Lindsay / HT1632_LedMatrix

Library for Sure Electronics HT1632 based LED matrix displays. Supports multiple displays connected together.

Dependents:   HT1632MsgScroller SMS_LEDMatrixPrinter

HT1632_LedMatrix.cpp@8:61130f9b5b79, 2012-11-24 (annotated)

Committer:
SomeRandomBloke
Date:
Sat Nov 24 21:58:03 2012 +0000
Revision:
8:61130f9b5b79
Parent:
6:80f554fd77a0
Child:
9:8a3c981babd9
Updates for latest displays

Who changed what in which revision?

UserRevisionLine numberNew contents of line
SomeRandomBloke 6:80f554fd77a0 1 /** Library for Holtek HT1632 LED driver chip,
SomeRandomBloke 6:80f554fd77a0 2 * As implemented on the Sure Electronics DE-DP10X display board
SomeRandomBloke 6:80f554fd77a0 3 * 8 x 32 dot matrix LED module.)
SomeRandomBloke 0:b3e0f5bb3b87 4 *
SomeRandomBloke 0:b3e0f5bb3b87 5 * Original code by:
SomeRandomBloke 0:b3e0f5bb3b87 6 * Nov, 2008 by Bill Westfield ("WestfW")
SomeRandomBloke 0:b3e0f5bb3b87 7 * Copyrighted and distributed under the terms of the Berkely license
SomeRandomBloke 0:b3e0f5bb3b87 8 * (copy freely, but include this notice of original author.)
SomeRandomBloke 0:b3e0f5bb3b87 9 *
SomeRandomBloke 0:b3e0f5bb3b87 10 * Adapted for 8x32 display by FlorinC.
SomeRandomBloke 0:b3e0f5bb3b87 11 *
SomeRandomBloke 2:3e477c909f7a 12 * Arduino Library Created and updated by Andrew Lindsay October/November 2009
SomeRandomBloke 2:3e477c909f7a 13 *
SomeRandomBloke 2:3e477c909f7a 14 * Ported to Mbed platform by Andrew Lindsay, November 2012
SomeRandomBloke 6:80f554fd77a0 15 *
SomeRandomBloke 6:80f554fd77a0 16 * @author Andrew Lindsay
SomeRandomBloke 6:80f554fd77a0 17 *
SomeRandomBloke 6:80f554fd77a0 18 * @section LICENSE
SomeRandomBloke 6:80f554fd77a0 19 *
SomeRandomBloke 6:80f554fd77a0 20 * Copyright (c) 2012 Andrew Lindsay (andrew [at] thiseldo [dot] co [dot] uk)
SomeRandomBloke 6:80f554fd77a0 21 *
SomeRandomBloke 6:80f554fd77a0 22 * Permission is hereby granted, free of charge, to any person obtaining a copy
SomeRandomBloke 6:80f554fd77a0 23 * of this software and associated documentation files (the "Software"), to deal
SomeRandomBloke 6:80f554fd77a0 24 * in the Software without restriction, including without limitation the rights
SomeRandomBloke 6:80f554fd77a0 25 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
SomeRandomBloke 6:80f554fd77a0 26 * copies of the Software, and to permit persons to whom the Software is
SomeRandomBloke 6:80f554fd77a0 27 * furnished to do so, subject to the following conditions:
SomeRandomBloke 6:80f554fd77a0 28
SomeRandomBloke 6:80f554fd77a0 29 * The above copyright notice and this permission notice shall be included in
SomeRandomBloke 6:80f554fd77a0 30 * all copies or substantial portions of the Software.
SomeRandomBloke 6:80f554fd77a0 31 *
SomeRandomBloke 6:80f554fd77a0 32 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
SomeRandomBloke 6:80f554fd77a0 33 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
SomeRandomBloke 6:80f554fd77a0 34 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
SomeRandomBloke 6:80f554fd77a0 35 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
SomeRandomBloke 6:80f554fd77a0 36 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
SomeRandomBloke 6:80f554fd77a0 37 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
SomeRandomBloke 6:80f554fd77a0 38 * THE SOFTWARE.
SomeRandomBloke 6:80f554fd77a0 39 *
SomeRandomBloke 6:80f554fd77a0 40 * @section DESCRIPTION
SomeRandomBloke 6:80f554fd77a0 41 * Functions to drive displays
SomeRandomBloke 6:80f554fd77a0 42 *
SomeRandomBloke 6:80f554fd77a0 43 */
SomeRandomBloke 0:b3e0f5bb3b87 44
SomeRandomBloke 0:b3e0f5bb3b87 45 #include "mbed.h"
SomeRandomBloke 0:b3e0f5bb3b87 46 #include "HT1632_LedMatrix.h"
SomeRandomBloke 0:b3e0f5bb3b87 47 #include "font_5x7_p.h"
SomeRandomBloke 0:b3e0f5bb3b87 48
SomeRandomBloke 0:b3e0f5bb3b87 49 #define HIGH 1
SomeRandomBloke 0:b3e0f5bb3b87 50 #define LOW 0
SomeRandomBloke 0:b3e0f5bb3b87 51 /*
SomeRandomBloke 0:b3e0f5bb3b87 52 * Set these constants to the values of the pins connected to the SureElectronics Module
SomeRandomBloke 6:80f554fd77a0 53 * For mbed, use WR=p7, DATA=p5, cs1=p17, cs2=p18, cs3=p19, cs4=p20
SomeRandomBloke 0:b3e0f5bb3b87 54 */
SomeRandomBloke 0:b3e0f5bb3b87 55
SomeRandomBloke 6:80f554fd77a0 56 DigitalOut ht1632_wrclk(p7);
SomeRandomBloke 6:80f554fd77a0 57 DigitalOut ht1632_data(p5);
SomeRandomBloke 0:b3e0f5bb3b87 58 DigitalOut ht1632_cs1(p17);
SomeRandomBloke 0:b3e0f5bb3b87 59 DigitalOut ht1632_cs2(p18);
SomeRandomBloke 0:b3e0f5bb3b87 60 DigitalOut ht1632_cs3(p19);
SomeRandomBloke 0:b3e0f5bb3b87 61 DigitalOut ht1632_cs4(p20);
SomeRandomBloke 0:b3e0f5bb3b87 62
SomeRandomBloke 2:3e477c909f7a 63 // CS pins 17, 18, 19, 20 used.
SomeRandomBloke 6:80f554fd77a0 64 DigitalOut ht1632_cs[4] = {p17, p18, p19, p20}; // Chip Select (1, 2, 3, 4)
SomeRandomBloke 0:b3e0f5bb3b87 65
SomeRandomBloke 0:b3e0f5bb3b87 66 // helper macros
SomeRandomBloke 0:b3e0f5bb3b87 67 #define chip_number(x,y) (x >> 5) + (y >> 3)*numYDevices
SomeRandomBloke 3:48f430fe186e 68 #define chip_nibble_address(x,y) ((x%32)<<1) + ((y%8)>>2);
SomeRandomBloke 0:b3e0f5bb3b87 69 #define chip_byte_address(x,y) ((x%32)<<1);
SomeRandomBloke 0:b3e0f5bb3b87 70 #define max(a, b) (((a) > (b)) ? (a) : (b))
SomeRandomBloke 0:b3e0f5bb3b87 71
SomeRandomBloke 0:b3e0f5bb3b87 72 // Display size and configuration, defaul is for a single 8x32 display
SomeRandomBloke 0:b3e0f5bb3b87 73 uint8_t numDevices = 1; // Total number of devices
SomeRandomBloke 0:b3e0f5bb3b87 74 uint8_t numXDevices = 1; // Number of horizontal devices
SomeRandomBloke 0:b3e0f5bb3b87 75 uint8_t numYDevices = 1; // Number of vertical devices
SomeRandomBloke 0:b3e0f5bb3b87 76 uint8_t xMax = 32 * numXDevices-1;
SomeRandomBloke 0:b3e0f5bb3b87 77 uint8_t yMax = 8 * numYDevices-1;
SomeRandomBloke 0:b3e0f5bb3b87 78
SomeRandomBloke 0:b3e0f5bb3b87 79 // Variables used to keep track of cursor position
SomeRandomBloke 0:b3e0f5bb3b87 80 int cursorX = 0;
SomeRandomBloke 0:b3e0f5bb3b87 81 int cursorY = 0;
SomeRandomBloke 0:b3e0f5bb3b87 82
SomeRandomBloke 0:b3e0f5bb3b87 83 /*
SomeRandomBloke 0:b3e0f5bb3b87 84 * we keep a copy of the display controller contents so that we can
SomeRandomBloke 0:b3e0f5bb3b87 85 * know which bits are on without having to (slowly) read the device.
SomeRandomBloke 0:b3e0f5bb3b87 86 */
SomeRandomBloke 0:b3e0f5bb3b87 87 // 4 boards at 32 bytes per board + 1 byte means we don't need to check overwrite in putChar
SomeRandomBloke 0:b3e0f5bb3b87 88 uint8_t shadowram[129]; // our copy of the display's RAM
SomeRandomBloke 0:b3e0f5bb3b87 89
SomeRandomBloke 0:b3e0f5bb3b87 90
SomeRandomBloke 0:b3e0f5bb3b87 91 // Custom character buffers - 8 characters available
SomeRandomBloke 0:b3e0f5bb3b87 92 // 6 cols * 8 rows - first byte of each char is the number of columns used
SomeRandomBloke 0:b3e0f5bb3b87 93 // Bits are aranged in columns with LSB at top
SomeRandomBloke 3:48f430fe186e 94 uint8_t cgram [8][7] = {
SomeRandomBloke 0:b3e0f5bb3b87 95 { 0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 },
SomeRandomBloke 0:b3e0f5bb3b87 96 { 0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 },
SomeRandomBloke 0:b3e0f5bb3b87 97 { 0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 },
SomeRandomBloke 0:b3e0f5bb3b87 98 { 0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 },
SomeRandomBloke 0:b3e0f5bb3b87 99 { 0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 },
SomeRandomBloke 0:b3e0f5bb3b87 100 { 0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 },
SomeRandomBloke 0:b3e0f5bb3b87 101 { 0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 },
SomeRandomBloke 3:48f430fe186e 102 { 0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }
SomeRandomBloke 3:48f430fe186e 103 };
SomeRandomBloke 0:b3e0f5bb3b87 104
SomeRandomBloke 0:b3e0f5bb3b87 105
SomeRandomBloke 0:b3e0f5bb3b87 106 // Default constructor
SomeRandomBloke 3:48f430fe186e 107 HT1632_LedMatrix::HT1632_LedMatrix( void )
SomeRandomBloke 3:48f430fe186e 108 {
SomeRandomBloke 0:b3e0f5bb3b87 109 }
SomeRandomBloke 0:b3e0f5bb3b87 110
SomeRandomBloke 0:b3e0f5bb3b87 111
SomeRandomBloke 3:48f430fe186e 112 void HT1632_LedMatrix::init( uint8_t xDevices, uint8_t yDevices )
SomeRandomBloke 3:48f430fe186e 113 {
SomeRandomBloke 3:48f430fe186e 114 // Set up the display size based on number of devices both horizontal and vertical
SomeRandomBloke 3:48f430fe186e 115 numXDevices = xDevices;
SomeRandomBloke 3:48f430fe186e 116 xMax = 32 * numXDevices-1;
SomeRandomBloke 3:48f430fe186e 117 numYDevices = yDevices;
SomeRandomBloke 3:48f430fe186e 118 yMax = 8 * numYDevices-1;
SomeRandomBloke 3:48f430fe186e 119 numDevices = numXDevices * numYDevices;
SomeRandomBloke 0:b3e0f5bb3b87 120
SomeRandomBloke 3:48f430fe186e 121 // Disable all display CS lines by taking high
SomeRandomBloke 3:48f430fe186e 122 for( uint8_t i = 0; i < 4; i++ )
SomeRandomBloke 3:48f430fe186e 123 ht1632_cs[i] = HIGH;
SomeRandomBloke 0:b3e0f5bb3b87 124
SomeRandomBloke 4:7513dd37efed 125 for (uint8_t chipno=0; chipno<4; chipno++) {
SomeRandomBloke 3:48f430fe186e 126 chipfree(chipno); // unselect it
SomeRandomBloke 8:61130f9b5b79 127
SomeRandomBloke 8:61130f9b5b79 128 sendcmd(chipno, HT1632_CMD_SYSON); // System on
SomeRandomBloke 8:61130f9b5b79 129 sendcmd(chipno, HT1632_CMD_LEDON); // LEDs on
SomeRandomBloke 8:61130f9b5b79 130 sendcmd(chipno, HT1632_CMD_BLOFF); // Blink Off
SomeRandomBloke 8:61130f9b5b79 131 sendcmd(chipno, HT1632_CMD_MSTMD); // Master Mode
SomeRandomBloke 8:61130f9b5b79 132 sendcmd(chipno, HT1632_CMD_RCCLK); // Internal Oscillator
SomeRandomBloke 8:61130f9b5b79 133 sendcmd(chipno, HT1632_CMD_COMS00); // 08*32, NMOS drivers
SomeRandomBloke 3:48f430fe186e 134 sendcmd(chipno, HT1632_CMD_PWM | 0x0c); // PWM Duty
SomeRandomBloke 8:61130f9b5b79 135
SomeRandomBloke 3:48f430fe186e 136 for (uint8_t i=0; i<96; i++)
SomeRandomBloke 3:48f430fe186e 137 senddata(chipno, i, 0); // clear the display
SomeRandomBloke 3:48f430fe186e 138 wait(0.1);
SomeRandomBloke 3:48f430fe186e 139 }
SomeRandomBloke 3:48f430fe186e 140 cursorX = 0;
SomeRandomBloke 3:48f430fe186e 141 cursorY = 0;
SomeRandomBloke 0:b3e0f5bb3b87 142 }
SomeRandomBloke 3:48f430fe186e 143
SomeRandomBloke 6:80f554fd77a0 144 void HT1632_LedMatrix::displayOff( void )
SomeRandomBloke 6:80f554fd77a0 145 {
SomeRandomBloke 5:33b2bfce06b7 146 for (uint8_t chipno=0; chipno<4; chipno++) {
SomeRandomBloke 5:33b2bfce06b7 147 chipfree(chipno); // unselect it
SomeRandomBloke 5:33b2bfce06b7 148 sendcmd(chipno, HT1632_CMD_LEDOFF); // LEDs on
SomeRandomBloke 5:33b2bfce06b7 149 }
SomeRandomBloke 5:33b2bfce06b7 150 }
SomeRandomBloke 5:33b2bfce06b7 151
SomeRandomBloke 6:80f554fd77a0 152 void HT1632_LedMatrix::displayOn( void )
SomeRandomBloke 6:80f554fd77a0 153 {
SomeRandomBloke 5:33b2bfce06b7 154 for (uint8_t chipno=0; chipno<4; chipno++) {
SomeRandomBloke 5:33b2bfce06b7 155 chipfree(chipno); // unselect it
SomeRandomBloke 5:33b2bfce06b7 156 sendcmd(chipno, HT1632_CMD_LEDON); // LEDs on
SomeRandomBloke 5:33b2bfce06b7 157 }
SomeRandomBloke 5:33b2bfce06b7 158 }
SomeRandomBloke 5:33b2bfce06b7 159
SomeRandomBloke 5:33b2bfce06b7 160
SomeRandomBloke 0:b3e0f5bb3b87 161 /***********************************************************************
SomeRandomBloke 0:b3e0f5bb3b87 162 * chipselect / chipfree
SomeRandomBloke 0:b3e0f5bb3b87 163 * Select or de-select a particular ht1632 chip.
SomeRandomBloke 0:b3e0f5bb3b87 164 * De-selecting a chip ends the commands being sent to a chip.
SomeRandomBloke 0:b3e0f5bb3b87 165 * CD pins are active-low; writing 0 to the pin selects the chip.
SomeRandomBloke 0:b3e0f5bb3b87 166 ***********************************************************************/
SomeRandomBloke 0:b3e0f5bb3b87 167 void HT1632_LedMatrix::chipselect(uint8_t chipno)
SomeRandomBloke 0:b3e0f5bb3b87 168 {
SomeRandomBloke 8:61130f9b5b79 169 // for(int i=0; i<4; i++)
SomeRandomBloke 0:b3e0f5bb3b87 170 ht1632_cs[chipno] = LOW;
SomeRandomBloke 0:b3e0f5bb3b87 171 }
SomeRandomBloke 0:b3e0f5bb3b87 172
SomeRandomBloke 0:b3e0f5bb3b87 173 void HT1632_LedMatrix::chipfree(uint8_t chipno)
SomeRandomBloke 0:b3e0f5bb3b87 174 {
SomeRandomBloke 8:61130f9b5b79 175 // for(int i=0; i<4; i++)
SomeRandomBloke 0:b3e0f5bb3b87 176 ht1632_cs[chipno] = HIGH;
SomeRandomBloke 0:b3e0f5bb3b87 177 }
SomeRandomBloke 0:b3e0f5bb3b87 178
SomeRandomBloke 0:b3e0f5bb3b87 179 /*
SomeRandomBloke 0:b3e0f5bb3b87 180 * writebits
SomeRandomBloke 0:b3e0f5bb3b87 181 * Write bits to h1632 on pins HT1632_DATA, HT1632_WRCLK
SomeRandomBloke 0:b3e0f5bb3b87 182 * Chip is assumed to already be chip-selected
SomeRandomBloke 0:b3e0f5bb3b87 183 * Bits are shifted out from MSB to LSB, with the first bit sent
SomeRandomBloke 0:b3e0f5bb3b87 184 * being (bits & firstbit), shifted till firsbit is zero.
SomeRandomBloke 0:b3e0f5bb3b87 185 */
SomeRandomBloke 0:b3e0f5bb3b87 186 void HT1632_LedMatrix::writebits (uint8_t bits, uint8_t firstbit)
SomeRandomBloke 0:b3e0f5bb3b87 187 {
SomeRandomBloke 3:48f430fe186e 188 while (firstbit) {
SomeRandomBloke 3:48f430fe186e 189 ht1632_wrclk = LOW;
SomeRandomBloke 3:48f430fe186e 190 if (bits & firstbit) {
SomeRandomBloke 3:48f430fe186e 191 ht1632_data = HIGH;
SomeRandomBloke 3:48f430fe186e 192 } else {
SomeRandomBloke 3:48f430fe186e 193 ht1632_data = LOW;
SomeRandomBloke 3:48f430fe186e 194 }
SomeRandomBloke 3:48f430fe186e 195 ht1632_wrclk = HIGH;
SomeRandomBloke 3:48f430fe186e 196 firstbit >>= 1;
SomeRandomBloke 0:b3e0f5bb3b87 197 }
SomeRandomBloke 0:b3e0f5bb3b87 198 }
SomeRandomBloke 0:b3e0f5bb3b87 199
SomeRandomBloke 0:b3e0f5bb3b87 200 /*
SomeRandomBloke 0:b3e0f5bb3b87 201 * writedatabits
SomeRandomBloke 0:b3e0f5bb3b87 202 * Write databits to h1632 on pins HT1632_DATA, HT1632_WRCLK
SomeRandomBloke 0:b3e0f5bb3b87 203 * Chip is assumed to already be chip-selected
SomeRandomBloke 0:b3e0f5bb3b87 204 * Bits are shifted out from LSB to MSB
SomeRandomBloke 0:b3e0f5bb3b87 205 */
SomeRandomBloke 0:b3e0f5bb3b87 206 void HT1632_LedMatrix::writedatabits (uint8_t bits, uint8_t count)
SomeRandomBloke 0:b3e0f5bb3b87 207 {
SomeRandomBloke 3:48f430fe186e 208 while (count) {
SomeRandomBloke 3:48f430fe186e 209 ht1632_wrclk = LOW;
SomeRandomBloke 3:48f430fe186e 210 ht1632_data = bits & 1;
SomeRandomBloke 3:48f430fe186e 211 ht1632_wrclk = HIGH;
SomeRandomBloke 3:48f430fe186e 212 count--;
SomeRandomBloke 3:48f430fe186e 213 bits >>= 1;
SomeRandomBloke 0:b3e0f5bb3b87 214 }
SomeRandomBloke 0:b3e0f5bb3b87 215 }
SomeRandomBloke 0:b3e0f5bb3b87 216
SomeRandomBloke 0:b3e0f5bb3b87 217 /*
SomeRandomBloke 0:b3e0f5bb3b87 218 * sendcmd
SomeRandomBloke 0:b3e0f5bb3b87 219 * Send a command to the ht1632 chip.
SomeRandomBloke 0:b3e0f5bb3b87 220 * A command consists of a 3-bit "CMD" ID, an 8bit command, and
SomeRandomBloke 0:b3e0f5bb3b87 221 * one "don't care bit".
SomeRandomBloke 0:b3e0f5bb3b87 222 * Select 1 0 0 c7 c6 c5 c4 c3 c2 c1 c0 xx Free
SomeRandomBloke 0:b3e0f5bb3b87 223 */
SomeRandomBloke 0:b3e0f5bb3b87 224 void HT1632_LedMatrix::sendcmd (uint8_t chipno, uint8_t command)
SomeRandomBloke 0:b3e0f5bb3b87 225 {
SomeRandomBloke 3:48f430fe186e 226 chipselect(chipno); // Select chip
SomeRandomBloke 3:48f430fe186e 227 writebits(HT1632_ID_CMD, 0x04); // send 3 bits of id: COMMMAND
SomeRandomBloke 3:48f430fe186e 228 writebits(command, 0x80); // send the actual command
SomeRandomBloke 3:48f430fe186e 229 writebits(0, 1); // one extra dont-care bit in commands.
SomeRandomBloke 3:48f430fe186e 230 chipfree(chipno); //done
SomeRandomBloke 0:b3e0f5bb3b87 231 }
SomeRandomBloke 0:b3e0f5bb3b87 232
SomeRandomBloke 0:b3e0f5bb3b87 233 /*
SomeRandomBloke 0:b3e0f5bb3b87 234 * clear
SomeRandomBloke 0:b3e0f5bb3b87 235 * clear the display, and the shadow memory, and the snapshot
SomeRandomBloke 0:b3e0f5bb3b87 236 * memory. This uses the "write multiple words" capability of
SomeRandomBloke 0:b3e0f5bb3b87 237 * the chipset by writing all 96 words of memory without raising
SomeRandomBloke 0:b3e0f5bb3b87 238 * the chipselect signal.
SomeRandomBloke 0:b3e0f5bb3b87 239 */
SomeRandomBloke 0:b3e0f5bb3b87 240 void HT1632_LedMatrix::clear()
SomeRandomBloke 0:b3e0f5bb3b87 241 {
SomeRandomBloke 3:48f430fe186e 242 char i;
SomeRandomBloke 0:b3e0f5bb3b87 243
SomeRandomBloke 3:48f430fe186e 244 for (uint8_t chipno=0; chipno<numDevices; chipno++) {
SomeRandomBloke 3:48f430fe186e 245 chipselect(chipno); // Select chip
SomeRandomBloke 3:48f430fe186e 246 writebits(HT1632_ID_WR, 0x04); // send ID: WRITE to RAM
SomeRandomBloke 3:48f430fe186e 247 writebits(0, 0x40); // Send address
SomeRandomBloke 3:48f430fe186e 248 for (i = 0; i < 32; i++) // Clear entire display
SomeRandomBloke 3:48f430fe186e 249 writedatabits(0, 8); // send 8 bits of data
SomeRandomBloke 3:48f430fe186e 250 chipfree(chipno); // done
SomeRandomBloke 3:48f430fe186e 251 for (i=0; i < 64; i++)
SomeRandomBloke 3:48f430fe186e 252 shadowram[i+64*chipno] = 0;
SomeRandomBloke 3:48f430fe186e 253 }
SomeRandomBloke 3:48f430fe186e 254 cursorX = 0;
SomeRandomBloke 3:48f430fe186e 255 cursorY = 0;
SomeRandomBloke 0:b3e0f5bb3b87 256 }
SomeRandomBloke 0:b3e0f5bb3b87 257
SomeRandomBloke 0:b3e0f5bb3b87 258
SomeRandomBloke 0:b3e0f5bb3b87 259 // Brighness is from 0 to 15
SomeRandomBloke 3:48f430fe186e 260 void HT1632_LedMatrix::setBrightness( unsigned char brightness )
SomeRandomBloke 3:48f430fe186e 261 {
SomeRandomBloke 3:48f430fe186e 262 for (uint8_t chipno=0; chipno<numDevices; chipno++) {
SomeRandomBloke 3:48f430fe186e 263 sendcmd(chipno, HT1632_CMD_PWM | (brightness & 0x0F ));
SomeRandomBloke 3:48f430fe186e 264 }
SomeRandomBloke 0:b3e0f5bb3b87 265 }
SomeRandomBloke 0:b3e0f5bb3b87 266
SomeRandomBloke 0:b3e0f5bb3b87 267
SomeRandomBloke 0:b3e0f5bb3b87 268 /*
SomeRandomBloke 0:b3e0f5bb3b87 269 * senddata
SomeRandomBloke 0:b3e0f5bb3b87 270 * send a nibble (4 bits) of data to a particular memory location of the
SomeRandomBloke 0:b3e0f5bb3b87 271 * ht1632. The command has 3 bit ID, 7 bits of address, and 4 bits of data.
SomeRandomBloke 0:b3e0f5bb3b87 272 * Select 1 0 1 A6 A5 A4 A3 A2 A1 A0 D0 D1 D2 D3 Free
SomeRandomBloke 0:b3e0f5bb3b87 273 * Note that the address is sent MSB first, while the data is sent LSB first!
SomeRandomBloke 0:b3e0f5bb3b87 274 * This means that somewhere a bit reversal will have to be done to get
SomeRandomBloke 0:b3e0f5bb3b87 275 * zero-based addressing of words and dots within words.
SomeRandomBloke 0:b3e0f5bb3b87 276 */
SomeRandomBloke 0:b3e0f5bb3b87 277 void HT1632_LedMatrix::senddata (uint8_t chipno, uint8_t address, uint8_t data)
SomeRandomBloke 0:b3e0f5bb3b87 278 {
SomeRandomBloke 3:48f430fe186e 279 chipselect(chipno); // Select chip
SomeRandomBloke 3:48f430fe186e 280 writebits(HT1632_ID_WR, 0x04); // send ID: WRITE to RAM
SomeRandomBloke 3:48f430fe186e 281 writebits(address, 0x40); // Send address
SomeRandomBloke 3:48f430fe186e 282 writedatabits(data, 4); // send 4 bits of data
SomeRandomBloke 3:48f430fe186e 283 chipfree(chipno); // done
SomeRandomBloke 0:b3e0f5bb3b87 284 }
SomeRandomBloke 0:b3e0f5bb3b87 285
SomeRandomBloke 0:b3e0f5bb3b87 286 /*
SomeRandomBloke 0:b3e0f5bb3b87 287 * sendcol
SomeRandomBloke 0:b3e0f5bb3b87 288 * send a byte of data to a particular memory location of the
SomeRandomBloke 0:b3e0f5bb3b87 289 * ht1632. The command has 3 bit ID, 7 bits of address, and 8 bits of data.
SomeRandomBloke 0:b3e0f5bb3b87 290 * Select 1 0 1 A6 A5 A4 A3 A2 A1 A0 D0 D1 D2 D3 D4 D5 D6 D7 D8 Free
SomeRandomBloke 0:b3e0f5bb3b87 291 * Note that the address is sent MSB first, while the data is sent LSB first!
SomeRandomBloke 0:b3e0f5bb3b87 292 * This means that somewhere a bit reversal will have to be done to get
SomeRandomBloke 0:b3e0f5bb3b87 293 * zero-based addressing of words and dots within words.
SomeRandomBloke 0:b3e0f5bb3b87 294 */
SomeRandomBloke 0:b3e0f5bb3b87 295 void HT1632_LedMatrix::sendcol (uint8_t chipno, uint8_t address, uint8_t data)
SomeRandomBloke 0:b3e0f5bb3b87 296 {
SomeRandomBloke 3:48f430fe186e 297 chipselect(chipno); // Select chip
SomeRandomBloke 3:48f430fe186e 298 writebits(HT1632_ID_WR, 0x04); // send ID: WRITE to RAM
SomeRandomBloke 3:48f430fe186e 299 writebits(address, 0x40); // Send address
SomeRandomBloke 3:48f430fe186e 300 writedatabits(data, 8); // send 8 bits of data
SomeRandomBloke 3:48f430fe186e 301 chipfree(chipno); // done
SomeRandomBloke 0:b3e0f5bb3b87 302 }
SomeRandomBloke 0:b3e0f5bb3b87 303
SomeRandomBloke 0:b3e0f5bb3b87 304 // Write a string at the position specified
SomeRandomBloke 4:7513dd37efed 305 // x and y start from 0 and count number of pixels, 2nd row on a 2 row display is y=8
SomeRandomBloke 3:48f430fe186e 306 void HT1632_LedMatrix::putString(int x, int y, char *str)
SomeRandomBloke 3:48f430fe186e 307 {
SomeRandomBloke 0:b3e0f5bb3b87 308 cursorX = x;
SomeRandomBloke 0:b3e0f5bb3b87 309 cursorY = y;
SomeRandomBloke 0:b3e0f5bb3b87 310 while( *str ) {
SomeRandomBloke 0:b3e0f5bb3b87 311 putChar( cursorX, y, *str++ );
SomeRandomBloke 0:b3e0f5bb3b87 312 }
SomeRandomBloke 0:b3e0f5bb3b87 313 }
SomeRandomBloke 0:b3e0f5bb3b87 314
SomeRandomBloke 0:b3e0f5bb3b87 315 /*
SomeRandomBloke 0:b3e0f5bb3b87 316 * Copy a character glyph from the smallFont data structure to
SomeRandomBloke 0:b3e0f5bb3b87 317 * display memory, with its upper left at the given coordinate
SomeRandomBloke 0:b3e0f5bb3b87 318 * This is unoptimized and simply uses plot() to draw each dot.
SomeRandomBloke 0:b3e0f5bb3b87 319 */
SomeRandomBloke 3:48f430fe186e 320 void HT1632_LedMatrix::write( uint8_t c)
SomeRandomBloke 3:48f430fe186e 321 {
SomeRandomBloke 3:48f430fe186e 322 putChar( cursorX, cursorY, (char)c );
SomeRandomBloke 0:b3e0f5bb3b87 323 }
SomeRandomBloke 0:b3e0f5bb3b87 324
SomeRandomBloke 0:b3e0f5bb3b87 325 /*
SomeRandomBloke 0:b3e0f5bb3b87 326 * Copy a character glyph from the myfont data structure to
SomeRandomBloke 0:b3e0f5bb3b87 327 * display memory, with its upper left at the given coordinate
SomeRandomBloke 0:b3e0f5bb3b87 328 * This is unoptimized and simply uses plot() to draw each dot.
SomeRandomBloke 0:b3e0f5bb3b87 329 * returns number of columns that didn't fit
SomeRandomBloke 0:b3e0f5bb3b87 330 */
SomeRandomBloke 3:48f430fe186e 331 uint8_t HT1632_LedMatrix::putChar(int x, int y, char c)
SomeRandomBloke 3:48f430fe186e 332 {
SomeRandomBloke 3:48f430fe186e 333 // fonts defined for ascii 32 and beyond (index 0 in font array is ascii 32);
SomeRandomBloke 3:48f430fe186e 334 // CGRAM characters are in range 0 to 15 with 8-15 being repeat of 0-7
SomeRandomBloke 3:48f430fe186e 335 // note we force y to be modulo 8 - we do not support writing character to partial y values.
SomeRandomBloke 3:48f430fe186e 336
SomeRandomBloke 3:48f430fe186e 337 uint8_t charIndex;
SomeRandomBloke 3:48f430fe186e 338 uint8_t colData;
SomeRandomBloke 3:48f430fe186e 339 uint8_t numCols;
SomeRandomBloke 3:48f430fe186e 340 uint8_t chipno;
SomeRandomBloke 3:48f430fe186e 341 uint8_t addr;
SomeRandomBloke 3:48f430fe186e 342 uint8_t colsLeft = 0; // cols that didn't fit
SomeRandomBloke 3:48f430fe186e 343
SomeRandomBloke 3:48f430fe186e 344 if( c > 15 ) {
SomeRandomBloke 3:48f430fe186e 345 // Regular characters
SomeRandomBloke 3:48f430fe186e 346 // replace undisplayable characters with blank;
SomeRandomBloke 3:48f430fe186e 347 if (c < 32 || c > 126) {
SomeRandomBloke 3:48f430fe186e 348 charIndex = 0;
SomeRandomBloke 3:48f430fe186e 349 } else {
SomeRandomBloke 3:48f430fe186e 350 charIndex = c - 32;
SomeRandomBloke 3:48f430fe186e 351 }
SomeRandomBloke 0:b3e0f5bb3b87 352
SomeRandomBloke 3:48f430fe186e 353 // move character definition, pixel by pixel, onto the display;
SomeRandomBloke 3:48f430fe186e 354 // fonts are defined as one byte per col;
SomeRandomBloke 3:48f430fe186e 355 numCols=smallFont[charIndex][6]; // get the number of columns this character uses
SomeRandomBloke 3:48f430fe186e 356 for (uint8_t col=0; col<numCols; col++) {
SomeRandomBloke 3:48f430fe186e 357 colData = smallFont[charIndex][col];
SomeRandomBloke 3:48f430fe186e 358 chipno = chip_number(x,y);
SomeRandomBloke 3:48f430fe186e 359 addr = chip_byte_address(x,y); // compute which memory byte this is in
SomeRandomBloke 3:48f430fe186e 360 if (x <= xMax && y <= yMax) {
SomeRandomBloke 3:48f430fe186e 361 shadowram[(addr>>1)+32*chipno] = colData;
SomeRandomBloke 3:48f430fe186e 362 sendcol(chipno,addr,colData);
SomeRandomBloke 3:48f430fe186e 363 x++;
SomeRandomBloke 3:48f430fe186e 364 } else {
SomeRandomBloke 3:48f430fe186e 365 colsLeft++;
SomeRandomBloke 3:48f430fe186e 366 }
SomeRandomBloke 3:48f430fe186e 367 }
SomeRandomBloke 0:b3e0f5bb3b87 368 } else {
SomeRandomBloke 3:48f430fe186e 369 // CGRAM Characters
SomeRandomBloke 3:48f430fe186e 370 charIndex = c & 0x07; // Only low 3 bits count
SomeRandomBloke 3:48f430fe186e 371 numCols=cgram[charIndex][0]; // get the number of columns this character uses
SomeRandomBloke 3:48f430fe186e 372 // fonts are defined as one byte per col;
SomeRandomBloke 3:48f430fe186e 373 for (uint8_t col=1; col<=numCols; col++) {
SomeRandomBloke 3:48f430fe186e 374 colData = cgram[charIndex][col];
SomeRandomBloke 3:48f430fe186e 375 chipno = chip_number(x,y);
SomeRandomBloke 3:48f430fe186e 376 addr = chip_byte_address(x,y); // compute which memory byte this is in
SomeRandomBloke 3:48f430fe186e 377 if (x <= xMax && y <= yMax) {
SomeRandomBloke 3:48f430fe186e 378 shadowram[(addr>>1)+32*chipno] = colData;
SomeRandomBloke 3:48f430fe186e 379 sendcol(chipno,addr,colData);
SomeRandomBloke 3:48f430fe186e 380 x++;
SomeRandomBloke 3:48f430fe186e 381 } else {
SomeRandomBloke 3:48f430fe186e 382 colsLeft++;
SomeRandomBloke 3:48f430fe186e 383 }
SomeRandomBloke 3:48f430fe186e 384 }
SomeRandomBloke 0:b3e0f5bb3b87 385 }
SomeRandomBloke 0:b3e0f5bb3b87 386
SomeRandomBloke 3:48f430fe186e 387 cursorX = x;
SomeRandomBloke 3:48f430fe186e 388 cursorY = y;
SomeRandomBloke 0:b3e0f5bb3b87 389
SomeRandomBloke 3:48f430fe186e 390 return colsLeft;
SomeRandomBloke 0:b3e0f5bb3b87 391 }
SomeRandomBloke 0:b3e0f5bb3b87 392
SomeRandomBloke 0:b3e0f5bb3b87 393 // Set position of cursor for writing
SomeRandomBloke 3:48f430fe186e 394 void HT1632_LedMatrix::gotoXY(int x, int y)
SomeRandomBloke 3:48f430fe186e 395 {
SomeRandomBloke 0:b3e0f5bb3b87 396 cursorX = x;
SomeRandomBloke 0:b3e0f5bb3b87 397 cursorY = y;
SomeRandomBloke 0:b3e0f5bb3b87 398 }
SomeRandomBloke 0:b3e0f5bb3b87 399
SomeRandomBloke 0:b3e0f5bb3b87 400 void HT1632_LedMatrix::getXY(int* x, int* y)
SomeRandomBloke 0:b3e0f5bb3b87 401 {
SomeRandomBloke 0:b3e0f5bb3b87 402 *x = cursorX;
SomeRandomBloke 0:b3e0f5bb3b87 403 *y = cursorY;
SomeRandomBloke 0:b3e0f5bb3b87 404 }
SomeRandomBloke 0:b3e0f5bb3b87 405
SomeRandomBloke 0:b3e0f5bb3b87 406 void HT1632_LedMatrix::getXYMax(int* x, int* y)
SomeRandomBloke 0:b3e0f5bb3b87 407 {
SomeRandomBloke 0:b3e0f5bb3b87 408 *x = xMax;
SomeRandomBloke 0:b3e0f5bb3b87 409 *y = yMax;
SomeRandomBloke 0:b3e0f5bb3b87 410 }
SomeRandomBloke 0:b3e0f5bb3b87 411
SomeRandomBloke 0:b3e0f5bb3b87 412 // Shift cursor X position a number of positions either left or right.
SomeRandomBloke 3:48f430fe186e 413 void HT1632_LedMatrix::shiftCursorX(int xinc)
SomeRandomBloke 3:48f430fe186e 414 {
SomeRandomBloke 0:b3e0f5bb3b87 415 cursorX += xinc;
SomeRandomBloke 0:b3e0f5bb3b87 416 }
SomeRandomBloke 0:b3e0f5bb3b87 417
SomeRandomBloke 0:b3e0f5bb3b87 418
SomeRandomBloke 0:b3e0f5bb3b87 419 /*
SomeRandomBloke 0:b3e0f5bb3b87 420 * plot a point on the display, with the upper left hand corner
SomeRandomBloke 0:b3e0f5bb3b87 421 * being (0,0), and the lower right hand corner being (xMax-1, yMax-1).
SomeRandomBloke 0:b3e0f5bb3b87 422 * Note that Y increases going "downward" in contrast with most
SomeRandomBloke 0:b3e0f5bb3b87 423 * mathematical coordiate systems, but in common with many displays
SomeRandomBloke 0:b3e0f5bb3b87 424 * basic bounds checking used.
SomeRandomBloke 0:b3e0f5bb3b87 425 */
SomeRandomBloke 0:b3e0f5bb3b87 426 void HT1632_LedMatrix::plot (int x, int y, char val)
SomeRandomBloke 0:b3e0f5bb3b87 427 {
SomeRandomBloke 3:48f430fe186e 428 if (x<0 || x>xMax || y<0 || y>yMax)
SomeRandomBloke 3:48f430fe186e 429 return;
SomeRandomBloke 0:b3e0f5bb3b87 430
SomeRandomBloke 3:48f430fe186e 431 uint8_t chipno = chip_number(x,y);
SomeRandomBloke 3:48f430fe186e 432 char addr = chip_byte_address(x,y); // compute which memory word this is in
SomeRandomBloke 3:48f430fe186e 433 char shadowAddress = addr >>1;
SomeRandomBloke 0:b3e0f5bb3b87 434
SomeRandomBloke 3:48f430fe186e 435 char bitval = 1<<(y&7); // compute which bit will need set
SomeRandomBloke 0:b3e0f5bb3b87 436
SomeRandomBloke 3:48f430fe186e 437 if (val) { // Modify the shadow memory
SomeRandomBloke 3:48f430fe186e 438 shadowram[shadowAddress +32*chipno] |= bitval;
SomeRandomBloke 3:48f430fe186e 439 } else {
SomeRandomBloke 3:48f430fe186e 440 shadowram[shadowAddress +32*chipno] &= ~bitval;
SomeRandomBloke 3:48f430fe186e 441 }
SomeRandomBloke 3:48f430fe186e 442 // Now copy the new memory value to the display
SomeRandomBloke 3:48f430fe186e 443 sendcol(chipno, addr, shadowram[shadowAddress +32*chipno]);
SomeRandomBloke 0:b3e0f5bb3b87 444 }
SomeRandomBloke 0:b3e0f5bb3b87 445
SomeRandomBloke 0:b3e0f5bb3b87 446
SomeRandomBloke 3:48f430fe186e 447 void HT1632_LedMatrix::setCustomChar( int charNum, unsigned char cgchar[] )
SomeRandomBloke 3:48f430fe186e 448 {
SomeRandomBloke 0:b3e0f5bb3b87 449 for(int i=1; i<7; i++ ) {
SomeRandomBloke 0:b3e0f5bb3b87 450 cgram[charNum][i] = (uint8_t)cgchar[i];
SomeRandomBloke 0:b3e0f5bb3b87 451 }
SomeRandomBloke 0:b3e0f5bb3b87 452 cgram[charNum][6] = 0;
SomeRandomBloke 0:b3e0f5bb3b87 453 cgram[charNum][0] = 6;
SomeRandomBloke 0:b3e0f5bb3b87 454 }
SomeRandomBloke 0:b3e0f5bb3b87 455
SomeRandomBloke 3:48f430fe186e 456 void HT1632_LedMatrix::setCustomChar( int charNum, unsigned char cgchar[], uint8_t numCols )
SomeRandomBloke 3:48f430fe186e 457 {
SomeRandomBloke 0:b3e0f5bb3b87 458 numCols = max(numCols, 6 );
SomeRandomBloke 0:b3e0f5bb3b87 459 for(int i=1; i<=numCols; i++ ) {
SomeRandomBloke 0:b3e0f5bb3b87 460 cgram[charNum][i] = (uint8_t)cgchar[i];
SomeRandomBloke 0:b3e0f5bb3b87 461 }
SomeRandomBloke 0:b3e0f5bb3b87 462 cgram[charNum][0] = numCols;
SomeRandomBloke 0:b3e0f5bb3b87 463 cgram[charNum][numCols] = 0;
SomeRandomBloke 0:b3e0f5bb3b87 464 }
SomeRandomBloke 0:b3e0f5bb3b87 465
SomeRandomBloke 4:7513dd37efed 466 void HT1632_LedMatrix::scrollLeft(uint8_t numberCols, uint8_t lineNum )
SomeRandomBloke 0:b3e0f5bb3b87 467 {
SomeRandomBloke 4:7513dd37efed 468
SomeRandomBloke 4:7513dd37efed 469 for (int i=0; i<xMax-numberCols; i++) {
SomeRandomBloke 4:7513dd37efed 470 shadowram[i]=shadowram[i+numberCols];
SomeRandomBloke 4:7513dd37efed 471 }
SomeRandomBloke 4:7513dd37efed 472 for (int i=xMax-numberCols; i<xMax; i++) {
SomeRandomBloke 4:7513dd37efed 473 shadowram[i]=0;
SomeRandomBloke 4:7513dd37efed 474 }
SomeRandomBloke 6:80f554fd77a0 475 /*
SomeRandomBloke 6:80f554fd77a0 476 for (int i=0; i<128-numberCols-1; i++) {
SomeRandomBloke 6:80f554fd77a0 477 shadowram[i]=shadowram[i+numberCols];
SomeRandomBloke 6:80f554fd77a0 478 }
SomeRandomBloke 6:80f554fd77a0 479 for (int i=128-numberCols; i<128; i++) {
SomeRandomBloke 6:80f554fd77a0 480 shadowram[i]=0;
SomeRandomBloke 6:80f554fd77a0 481 }
SomeRandomBloke 6:80f554fd77a0 482 */
SomeRandomBloke 0:b3e0f5bb3b87 483 cursorX -= numberCols;
SomeRandomBloke 0:b3e0f5bb3b87 484 if (cursorX < 0 ) cursorX = 0;
SomeRandomBloke 0:b3e0f5bb3b87 485 }
SomeRandomBloke 0:b3e0f5bb3b87 486
SomeRandomBloke 0:b3e0f5bb3b87 487 void HT1632_LedMatrix::putShadowRam()
SomeRandomBloke 0:b3e0f5bb3b87 488 {
SomeRandomBloke 0:b3e0f5bb3b87 489 for (int chipno=0; chipno<numDevices; chipno++)
SomeRandomBloke 0:b3e0f5bb3b87 490 putShadowRam(chipno);
SomeRandomBloke 0:b3e0f5bb3b87 491 }
SomeRandomBloke 0:b3e0f5bb3b87 492
SomeRandomBloke 0:b3e0f5bb3b87 493 void HT1632_LedMatrix::putShadowRam(uint8_t chipno)
SomeRandomBloke 0:b3e0f5bb3b87 494 {
SomeRandomBloke 3:48f430fe186e 495 for (int i=0; i<64; i+=2) {
SomeRandomBloke 0:b3e0f5bb3b87 496 sendcol(chipno,i,shadowram[(i>>1)+32*chipno]);
SomeRandomBloke 0:b3e0f5bb3b87 497 }
SomeRandomBloke 0:b3e0f5bb3b87 498 }
SomeRandomBloke 0:b3e0f5bb3b87 499
SomeRandomBloke 0:b3e0f5bb3b87 500 #ifdef USE_GRAPHIC
SomeRandomBloke 0:b3e0f5bb3b87 501 /*
SomeRandomBloke 0:b3e0f5bb3b87 502 * Name : drawLine
SomeRandomBloke 0:b3e0f5bb3b87 503 * Description : Draws a line between two points on the display.
SomeRandomBloke 0:b3e0f5bb3b87 504 * Argument(s) : x1, y1 - Absolute pixel coordinates for line origin.
SomeRandomBloke 0:b3e0f5bb3b87 505 * x2, y2 - Absolute pixel coordinates for line end.
SomeRandomBloke 0:b3e0f5bb3b87 506 * c - either PIXEL_ON, PIXEL_OFF
SomeRandomBloke 0:b3e0f5bb3b87 507 * Return value : none
SomeRandomBloke 0:b3e0f5bb3b87 508 */
SomeRandomBloke 0:b3e0f5bb3b87 509 void HT1632_LedMatrix::drawLine(unsigned char x1, unsigned char y1,
SomeRandomBloke 3:48f430fe186e 510 unsigned char x2, unsigned char y2, unsigned char c)
SomeRandomBloke 3:48f430fe186e 511 {
SomeRandomBloke 0:b3e0f5bb3b87 512 int dx, dy, stepx, stepy, fraction;
SomeRandomBloke 0:b3e0f5bb3b87 513
SomeRandomBloke 0:b3e0f5bb3b87 514 /* Calculate differential form */
SomeRandomBloke 0:b3e0f5bb3b87 515 /* dy y2 - y1 */
SomeRandomBloke 0:b3e0f5bb3b87 516 /* -- = ------- */
SomeRandomBloke 0:b3e0f5bb3b87 517 /* dx x2 - x1 */
SomeRandomBloke 0:b3e0f5bb3b87 518
SomeRandomBloke 0:b3e0f5bb3b87 519 /* Take differences */
SomeRandomBloke 0:b3e0f5bb3b87 520 dy = y2 - y1;
SomeRandomBloke 0:b3e0f5bb3b87 521 dx = x2 - x1;
SomeRandomBloke 0:b3e0f5bb3b87 522
SomeRandomBloke 0:b3e0f5bb3b87 523 /* dy is negative */
SomeRandomBloke 0:b3e0f5bb3b87 524 if ( dy < 0 ) {
SomeRandomBloke 0:b3e0f5bb3b87 525 dy = -dy;
SomeRandomBloke 0:b3e0f5bb3b87 526 stepy = -1;
SomeRandomBloke 0:b3e0f5bb3b87 527 } else {
SomeRandomBloke 0:b3e0f5bb3b87 528 stepy = 1;
SomeRandomBloke 0:b3e0f5bb3b87 529 }
SomeRandomBloke 0:b3e0f5bb3b87 530
SomeRandomBloke 0:b3e0f5bb3b87 531 /* dx is negative */
SomeRandomBloke 0:b3e0f5bb3b87 532 if ( dx < 0 ) {
SomeRandomBloke 0:b3e0f5bb3b87 533 dx = -dx;
SomeRandomBloke 0:b3e0f5bb3b87 534 stepx = -1;
SomeRandomBloke 0:b3e0f5bb3b87 535 } else {
SomeRandomBloke 0:b3e0f5bb3b87 536 stepx = 1;
SomeRandomBloke 0:b3e0f5bb3b87 537 }
SomeRandomBloke 0:b3e0f5bb3b87 538
SomeRandomBloke 0:b3e0f5bb3b87 539 dx <<= 1;
SomeRandomBloke 0:b3e0f5bb3b87 540 dy <<= 1;
SomeRandomBloke 0:b3e0f5bb3b87 541
SomeRandomBloke 0:b3e0f5bb3b87 542 /* Draw initial position */
SomeRandomBloke 0:b3e0f5bb3b87 543 plot( x1, y1, c );
SomeRandomBloke 0:b3e0f5bb3b87 544
SomeRandomBloke 0:b3e0f5bb3b87 545 /* Draw next positions until end */
SomeRandomBloke 0:b3e0f5bb3b87 546 if ( dx > dy ) {
SomeRandomBloke 0:b3e0f5bb3b87 547 /* Take fraction */
SomeRandomBloke 0:b3e0f5bb3b87 548 fraction = dy - ( dx >> 1);
SomeRandomBloke 0:b3e0f5bb3b87 549 while ( x1 != x2 ) {
SomeRandomBloke 0:b3e0f5bb3b87 550 if ( fraction >= 0 ) {
SomeRandomBloke 0:b3e0f5bb3b87 551 y1 += stepy;
SomeRandomBloke 0:b3e0f5bb3b87 552 fraction -= dx;
SomeRandomBloke 0:b3e0f5bb3b87 553 }
SomeRandomBloke 0:b3e0f5bb3b87 554 x1 += stepx;
SomeRandomBloke 0:b3e0f5bb3b87 555 fraction += dy;
SomeRandomBloke 0:b3e0f5bb3b87 556
SomeRandomBloke 0:b3e0f5bb3b87 557 /* Draw calculated point */
SomeRandomBloke 0:b3e0f5bb3b87 558 plot( x1, y1, c );
SomeRandomBloke 0:b3e0f5bb3b87 559 }
SomeRandomBloke 0:b3e0f5bb3b87 560 } else {
SomeRandomBloke 0:b3e0f5bb3b87 561 /* Take fraction */
SomeRandomBloke 0:b3e0f5bb3b87 562 fraction = dx - ( dy >> 1);
SomeRandomBloke 0:b3e0f5bb3b87 563 while ( y1 != y2 ) {
SomeRandomBloke 0:b3e0f5bb3b87 564 if ( fraction >= 0 ) {
SomeRandomBloke 0:b3e0f5bb3b87 565 x1 += stepx;
SomeRandomBloke 0:b3e0f5bb3b87 566 fraction -= dy;
SomeRandomBloke 0:b3e0f5bb3b87 567 }
SomeRandomBloke 0:b3e0f5bb3b87 568 y1 += stepy;
SomeRandomBloke 0:b3e0f5bb3b87 569 fraction += dx;
SomeRandomBloke 0:b3e0f5bb3b87 570
SomeRandomBloke 0:b3e0f5bb3b87 571 /* Draw calculated point */
SomeRandomBloke 0:b3e0f5bb3b87 572 plot( x1, y1, c );
SomeRandomBloke 0:b3e0f5bb3b87 573 }
SomeRandomBloke 0:b3e0f5bb3b87 574 }
SomeRandomBloke 0:b3e0f5bb3b87 575 }
SomeRandomBloke 0:b3e0f5bb3b87 576
SomeRandomBloke 0:b3e0f5bb3b87 577
SomeRandomBloke 0:b3e0f5bb3b87 578 /*
SomeRandomBloke 0:b3e0f5bb3b87 579 * Name : drawRectangle
SomeRandomBloke 0:b3e0f5bb3b87 580 * Description : Draw a rectangle given to top left and bottom right points
SomeRandomBloke 0:b3e0f5bb3b87 581 * Argument(s) : x1, y1 - Absolute pixel coordinates for top left corner
SomeRandomBloke 0:b3e0f5bb3b87 582 * x2, y2 - Absolute pixel coordinates for bottom right corner
SomeRandomBloke 3:48f430fe186e 583 * c - either PIXEL_ON, PIXEL_OFF
SomeRandomBloke 0:b3e0f5bb3b87 584 * Return value : none
SomeRandomBloke 0:b3e0f5bb3b87 585 */
SomeRandomBloke 0:b3e0f5bb3b87 586 void HT1632_LedMatrix::drawRectangle(unsigned char x1, unsigned char y1,
SomeRandomBloke 3:48f430fe186e 587 unsigned char x2, unsigned char y2, unsigned char c)
SomeRandomBloke 3:48f430fe186e 588 {
SomeRandomBloke 0:b3e0f5bb3b87 589 drawLine( x1, y1, x2, y1, c );
SomeRandomBloke 0:b3e0f5bb3b87 590 drawLine( x1, y1, x1, y2, c );
SomeRandomBloke 0:b3e0f5bb3b87 591 drawLine( x1, y2, x2, y2, c );
SomeRandomBloke 0:b3e0f5bb3b87 592 drawLine( x2, y1, x2, y2, c );
SomeRandomBloke 0:b3e0f5bb3b87 593 }
SomeRandomBloke 0:b3e0f5bb3b87 594
SomeRandomBloke 0:b3e0f5bb3b87 595
SomeRandomBloke 0:b3e0f5bb3b87 596 /*
SomeRandomBloke 0:b3e0f5bb3b87 597 * Name : drawFilledRectangle
SomeRandomBloke 0:b3e0f5bb3b87 598 * Description : Draw a filled rectangle given to top left and bottom right points
SomeRandomBloke 0:b3e0f5bb3b87 599 * just simply draws horizontal lines where the rectangle would be
SomeRandomBloke 0:b3e0f5bb3b87 600 * Argument(s) : x1, y1 - Absolute pixel coordinates for top left corner
SomeRandomBloke 0:b3e0f5bb3b87 601 * x2, y2 - Absolute pixel coordinates for bottom right corner
SomeRandomBloke 0:b3e0f5bb3b87 602 * c - either PIXEL_ON, PIXEL_OFF
SomeRandomBloke 0:b3e0f5bb3b87 603 * Return value : none
SomeRandomBloke 0:b3e0f5bb3b87 604 */
SomeRandomBloke 0:b3e0f5bb3b87 605 void HT1632_LedMatrix::drawFilledRectangle(unsigned char x1, unsigned char y1,
SomeRandomBloke 3:48f430fe186e 606 unsigned char x2, unsigned char y2, unsigned char c)
SomeRandomBloke 3:48f430fe186e 607 {
SomeRandomBloke 0:b3e0f5bb3b87 608 for(int i=y1; i <= y2; i++ ) {
SomeRandomBloke 0:b3e0f5bb3b87 609 drawLine( x1, i, x2, i, c );
SomeRandomBloke 0:b3e0f5bb3b87 610 }
SomeRandomBloke 0:b3e0f5bb3b87 611 }
SomeRandomBloke 0:b3e0f5bb3b87 612
SomeRandomBloke 0:b3e0f5bb3b87 613
SomeRandomBloke 0:b3e0f5bb3b87 614 /*
SomeRandomBloke 0:b3e0f5bb3b87 615 * Name : drawCircle
SomeRandomBloke 3:48f430fe186e 616 * Description : Draw a circle using Bresenham's algorithm.
SomeRandomBloke 0:b3e0f5bb3b87 617 * Some small circles will look like squares!!
SomeRandomBloke 0:b3e0f5bb3b87 618 * Argument(s) : xc, yc - Centre of circle
SomeRandomBloke 0:b3e0f5bb3b87 619 * r - Radius
SomeRandomBloke 0:b3e0f5bb3b87 620 * c - either PIXEL_ON, PIXEL_OFF
SomeRandomBloke 3:48f430fe186e 621 * Return value : None
SomeRandomBloke 0:b3e0f5bb3b87 622 */
SomeRandomBloke 0:b3e0f5bb3b87 623 void HT1632_LedMatrix::drawCircle(unsigned char xc, unsigned char yc,
SomeRandomBloke 3:48f430fe186e 624 unsigned char r, unsigned char c)
SomeRandomBloke 3:48f430fe186e 625 {
SomeRandomBloke 0:b3e0f5bb3b87 626 int x=0;
SomeRandomBloke 0:b3e0f5bb3b87 627 int y=r;
SomeRandomBloke 0:b3e0f5bb3b87 628 int p=3-(2*r);
SomeRandomBloke 0:b3e0f5bb3b87 629
SomeRandomBloke 3:48f430fe186e 630 plot( xc+x,yc-y, c);
SomeRandomBloke 0:b3e0f5bb3b87 631
SomeRandomBloke 3:48f430fe186e 632 for(x=0; x<=y; x++) {
SomeRandomBloke 0:b3e0f5bb3b87 633 if (p<0) {
SomeRandomBloke 0:b3e0f5bb3b87 634 y=y;
SomeRandomBloke 0:b3e0f5bb3b87 635 p=(p+(4*x)+6);
SomeRandomBloke 0:b3e0f5bb3b87 636 } else {
SomeRandomBloke 0:b3e0f5bb3b87 637 y=y-1;
SomeRandomBloke 0:b3e0f5bb3b87 638 p=p+((4*(x-y)+10));
SomeRandomBloke 0:b3e0f5bb3b87 639 }
SomeRandomBloke 0:b3e0f5bb3b87 640
SomeRandomBloke 0:b3e0f5bb3b87 641 plot(xc+x,yc-y, c);
SomeRandomBloke 0:b3e0f5bb3b87 642 plot(xc-x,yc-y, c);
SomeRandomBloke 0:b3e0f5bb3b87 643 plot(xc+x,yc+y, c);
SomeRandomBloke 0:b3e0f5bb3b87 644 plot(xc-x,yc+y, c);
SomeRandomBloke 0:b3e0f5bb3b87 645 plot(xc+y,yc-x, c);
SomeRandomBloke 0:b3e0f5bb3b87 646 plot(xc-y,yc-x, c);
SomeRandomBloke 0:b3e0f5bb3b87 647 plot(xc+y,yc+x, c);
SomeRandomBloke 0:b3e0f5bb3b87 648 plot(xc-y,yc+x, c);
SomeRandomBloke 0:b3e0f5bb3b87 649 }
SomeRandomBloke 0:b3e0f5bb3b87 650 }
SomeRandomBloke 0:b3e0f5bb3b87 651 #endif
SomeRandomBloke 0:b3e0f5bb3b87 652
SomeRandomBloke 0:b3e0f5bb3b87 653 // The end!