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@9:8a3c981babd9, 2012-11-28 (annotated)

Committer:
SomeRandomBloke
Date:
Wed Nov 28 14:03:35 2012 +0000
Revision:
9:8a3c981babd9
Parent:
8:61130f9b5b79
Child:
10:af973a9c48b2
Added documentation

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 9:8a3c981babd9 78 uint8_t displayWidth = 32;
SomeRandomBloke 9:8a3c981babd9 79 uint8_t displayHeight = 8;
SomeRandomBloke 0:b3e0f5bb3b87 80
SomeRandomBloke 0:b3e0f5bb3b87 81 // Variables used to keep track of cursor position
SomeRandomBloke 0:b3e0f5bb3b87 82 int cursorX = 0;
SomeRandomBloke 0:b3e0f5bb3b87 83 int cursorY = 0;
SomeRandomBloke 0:b3e0f5bb3b87 84
SomeRandomBloke 0:b3e0f5bb3b87 85 /*
SomeRandomBloke 0:b3e0f5bb3b87 86 * we keep a copy of the display controller contents so that we can
SomeRandomBloke 0:b3e0f5bb3b87 87 * know which bits are on without having to (slowly) read the device.
SomeRandomBloke 0:b3e0f5bb3b87 88 */
SomeRandomBloke 0:b3e0f5bb3b87 89 // 4 boards at 32 bytes per board + 1 byte means we don't need to check overwrite in putChar
SomeRandomBloke 0:b3e0f5bb3b87 90 uint8_t shadowram[129]; // our copy of the display's RAM
SomeRandomBloke 0:b3e0f5bb3b87 91
SomeRandomBloke 0:b3e0f5bb3b87 92
SomeRandomBloke 0:b3e0f5bb3b87 93 // Custom character buffers - 8 characters available
SomeRandomBloke 0:b3e0f5bb3b87 94 // 6 cols * 8 rows - first byte of each char is the number of columns used
SomeRandomBloke 0:b3e0f5bb3b87 95 // Bits are aranged in columns with LSB at top
SomeRandomBloke 3:48f430fe186e 96 uint8_t cgram [8][7] = {
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 0:b3e0f5bb3b87 102 { 0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 },
SomeRandomBloke 0:b3e0f5bb3b87 103 { 0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 },
SomeRandomBloke 3:48f430fe186e 104 { 0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }
SomeRandomBloke 3:48f430fe186e 105 };
SomeRandomBloke 0:b3e0f5bb3b87 106
SomeRandomBloke 0:b3e0f5bb3b87 107
SomeRandomBloke 0:b3e0f5bb3b87 108 // Default constructor
SomeRandomBloke 3:48f430fe186e 109 HT1632_LedMatrix::HT1632_LedMatrix( void )
SomeRandomBloke 3:48f430fe186e 110 {
SomeRandomBloke 0:b3e0f5bb3b87 111 }
SomeRandomBloke 0:b3e0f5bb3b87 112
SomeRandomBloke 0:b3e0f5bb3b87 113
SomeRandomBloke 9:8a3c981babd9 114 void HT1632_LedMatrix::init( uint8_t xDevices, uint8_t yDevices, uint8_t displayType )
SomeRandomBloke 3:48f430fe186e 115 {
SomeRandomBloke 3:48f430fe186e 116 // Set up the display size based on number of devices both horizontal and vertical
SomeRandomBloke 9:8a3c981babd9 117
SomeRandomBloke 3:48f430fe186e 118 numXDevices = xDevices;
SomeRandomBloke 3:48f430fe186e 119 numYDevices = yDevices;
SomeRandomBloke 3:48f430fe186e 120 numDevices = numXDevices * numYDevices;
SomeRandomBloke 0:b3e0f5bb3b87 121
SomeRandomBloke 9:8a3c981babd9 122 if( displayType == HT1632_24x16 ) {
SomeRandomBloke 9:8a3c981babd9 123 displayWidth = 24;
SomeRandomBloke 9:8a3c981babd9 124 displayHeight = 16;
SomeRandomBloke 9:8a3c981babd9 125 } else {
SomeRandomBloke 9:8a3c981babd9 126 displayWidth = 32;
SomeRandomBloke 9:8a3c981babd9 127 displayHeight = 8;
SomeRandomBloke 9:8a3c981babd9 128 }
SomeRandomBloke 9:8a3c981babd9 129 xMax = displayWidth * numXDevices-1;
SomeRandomBloke 9:8a3c981babd9 130 yMax = displayHeight * numYDevices-1;
SomeRandomBloke 9:8a3c981babd9 131
SomeRandomBloke 3:48f430fe186e 132 // Disable all display CS lines by taking high
SomeRandomBloke 3:48f430fe186e 133 for( uint8_t i = 0; i < 4; i++ )
SomeRandomBloke 3:48f430fe186e 134 ht1632_cs[i] = HIGH;
SomeRandomBloke 0:b3e0f5bb3b87 135
SomeRandomBloke 4:7513dd37efed 136 for (uint8_t chipno=0; chipno<4; chipno++) {
SomeRandomBloke 3:48f430fe186e 137 chipfree(chipno); // unselect it
SomeRandomBloke 8:61130f9b5b79 138
SomeRandomBloke 8:61130f9b5b79 139 sendcmd(chipno, HT1632_CMD_SYSON); // System on
SomeRandomBloke 8:61130f9b5b79 140 sendcmd(chipno, HT1632_CMD_LEDON); // LEDs on
SomeRandomBloke 8:61130f9b5b79 141 sendcmd(chipno, HT1632_CMD_BLOFF); // Blink Off
SomeRandomBloke 8:61130f9b5b79 142 sendcmd(chipno, HT1632_CMD_MSTMD); // Master Mode
SomeRandomBloke 9:8a3c981babd9 143 sendcmd(chipno, HT1632_CMD_RCCLK); // Internal Oscillator
SomeRandomBloke 9:8a3c981babd9 144 if( displayType == HT1632_24x16 ) {
SomeRandomBloke 9:8a3c981babd9 145 // TODO - check
SomeRandomBloke 9:8a3c981babd9 146 sendcmd(chipno, HT1632_CMD_COMS10); // 16*24, NMOS drivers
SomeRandomBloke 9:8a3c981babd9 147 } else {
SomeRandomBloke 9:8a3c981babd9 148 sendcmd(chipno, HT1632_CMD_COMS00); // 08*32, NMOS drivers
SomeRandomBloke 9:8a3c981babd9 149 }
SomeRandomBloke 3:48f430fe186e 150 sendcmd(chipno, HT1632_CMD_PWM | 0x0c); // PWM Duty
SomeRandomBloke 8:61130f9b5b79 151
SomeRandomBloke 3:48f430fe186e 152 for (uint8_t i=0; i<96; i++)
SomeRandomBloke 3:48f430fe186e 153 senddata(chipno, i, 0); // clear the display
SomeRandomBloke 3:48f430fe186e 154 wait(0.1);
SomeRandomBloke 3:48f430fe186e 155 }
SomeRandomBloke 3:48f430fe186e 156 cursorX = 0;
SomeRandomBloke 3:48f430fe186e 157 cursorY = 0;
SomeRandomBloke 0:b3e0f5bb3b87 158 }
SomeRandomBloke 3:48f430fe186e 159
SomeRandomBloke 6:80f554fd77a0 160 void HT1632_LedMatrix::displayOff( void )
SomeRandomBloke 6:80f554fd77a0 161 {
SomeRandomBloke 5:33b2bfce06b7 162 for (uint8_t chipno=0; chipno<4; chipno++) {
SomeRandomBloke 5:33b2bfce06b7 163 chipfree(chipno); // unselect it
SomeRandomBloke 5:33b2bfce06b7 164 sendcmd(chipno, HT1632_CMD_LEDOFF); // LEDs on
SomeRandomBloke 5:33b2bfce06b7 165 }
SomeRandomBloke 5:33b2bfce06b7 166 }
SomeRandomBloke 5:33b2bfce06b7 167
SomeRandomBloke 6:80f554fd77a0 168 void HT1632_LedMatrix::displayOn( void )
SomeRandomBloke 6:80f554fd77a0 169 {
SomeRandomBloke 5:33b2bfce06b7 170 for (uint8_t chipno=0; chipno<4; chipno++) {
SomeRandomBloke 5:33b2bfce06b7 171 chipfree(chipno); // unselect it
SomeRandomBloke 5:33b2bfce06b7 172 sendcmd(chipno, HT1632_CMD_LEDON); // LEDs on
SomeRandomBloke 5:33b2bfce06b7 173 }
SomeRandomBloke 5:33b2bfce06b7 174 }
SomeRandomBloke 5:33b2bfce06b7 175
SomeRandomBloke 5:33b2bfce06b7 176
SomeRandomBloke 0:b3e0f5bb3b87 177 /***********************************************************************
SomeRandomBloke 0:b3e0f5bb3b87 178 * chipselect / chipfree
SomeRandomBloke 0:b3e0f5bb3b87 179 * Select or de-select a particular ht1632 chip.
SomeRandomBloke 0:b3e0f5bb3b87 180 * De-selecting a chip ends the commands being sent to a chip.
SomeRandomBloke 0:b3e0f5bb3b87 181 * CD pins are active-low; writing 0 to the pin selects the chip.
SomeRandomBloke 0:b3e0f5bb3b87 182 ***********************************************************************/
SomeRandomBloke 0:b3e0f5bb3b87 183 void HT1632_LedMatrix::chipselect(uint8_t chipno)
SomeRandomBloke 0:b3e0f5bb3b87 184 {
SomeRandomBloke 8:61130f9b5b79 185 // for(int i=0; i<4; i++)
SomeRandomBloke 0:b3e0f5bb3b87 186 ht1632_cs[chipno] = LOW;
SomeRandomBloke 0:b3e0f5bb3b87 187 }
SomeRandomBloke 0:b3e0f5bb3b87 188
SomeRandomBloke 0:b3e0f5bb3b87 189 void HT1632_LedMatrix::chipfree(uint8_t chipno)
SomeRandomBloke 0:b3e0f5bb3b87 190 {
SomeRandomBloke 8:61130f9b5b79 191 // for(int i=0; i<4; i++)
SomeRandomBloke 0:b3e0f5bb3b87 192 ht1632_cs[chipno] = HIGH;
SomeRandomBloke 0:b3e0f5bb3b87 193 }
SomeRandomBloke 0:b3e0f5bb3b87 194
SomeRandomBloke 9:8a3c981babd9 195 /**
SomeRandomBloke 0:b3e0f5bb3b87 196 * writebits
SomeRandomBloke 9:8a3c981babd9 197 * Write bits to HT1632 on pins HT1632_DATA, HT1632_WRCLK
SomeRandomBloke 0:b3e0f5bb3b87 198 * Chip is assumed to already be chip-selected
SomeRandomBloke 0:b3e0f5bb3b87 199 * Bits are shifted out from MSB to LSB, with the first bit sent
SomeRandomBloke 0:b3e0f5bb3b87 200 * being (bits & firstbit), shifted till firsbit is zero.
SomeRandomBloke 0:b3e0f5bb3b87 201 */
SomeRandomBloke 0:b3e0f5bb3b87 202 void HT1632_LedMatrix::writebits (uint8_t bits, uint8_t firstbit)
SomeRandomBloke 0:b3e0f5bb3b87 203 {
SomeRandomBloke 3:48f430fe186e 204 while (firstbit) {
SomeRandomBloke 3:48f430fe186e 205 ht1632_wrclk = LOW;
SomeRandomBloke 3:48f430fe186e 206 if (bits & firstbit) {
SomeRandomBloke 3:48f430fe186e 207 ht1632_data = HIGH;
SomeRandomBloke 3:48f430fe186e 208 } else {
SomeRandomBloke 3:48f430fe186e 209 ht1632_data = LOW;
SomeRandomBloke 3:48f430fe186e 210 }
SomeRandomBloke 3:48f430fe186e 211 ht1632_wrclk = HIGH;
SomeRandomBloke 3:48f430fe186e 212 firstbit >>= 1;
SomeRandomBloke 0:b3e0f5bb3b87 213 }
SomeRandomBloke 0:b3e0f5bb3b87 214 }
SomeRandomBloke 0:b3e0f5bb3b87 215
SomeRandomBloke 0:b3e0f5bb3b87 216 /*
SomeRandomBloke 0:b3e0f5bb3b87 217 * writedatabits
SomeRandomBloke 9:8a3c981babd9 218 * Write databits to HT1632 on pins HT1632_DATA, HT1632_WRCLK
SomeRandomBloke 0:b3e0f5bb3b87 219 * Chip is assumed to already be chip-selected
SomeRandomBloke 0:b3e0f5bb3b87 220 * Bits are shifted out from LSB to MSB
SomeRandomBloke 0:b3e0f5bb3b87 221 */
SomeRandomBloke 0:b3e0f5bb3b87 222 void HT1632_LedMatrix::writedatabits (uint8_t bits, uint8_t count)
SomeRandomBloke 0:b3e0f5bb3b87 223 {
SomeRandomBloke 3:48f430fe186e 224 while (count) {
SomeRandomBloke 3:48f430fe186e 225 ht1632_wrclk = LOW;
SomeRandomBloke 3:48f430fe186e 226 ht1632_data = bits & 1;
SomeRandomBloke 3:48f430fe186e 227 ht1632_wrclk = HIGH;
SomeRandomBloke 3:48f430fe186e 228 count--;
SomeRandomBloke 3:48f430fe186e 229 bits >>= 1;
SomeRandomBloke 0:b3e0f5bb3b87 230 }
SomeRandomBloke 0:b3e0f5bb3b87 231 }
SomeRandomBloke 0:b3e0f5bb3b87 232
SomeRandomBloke 0:b3e0f5bb3b87 233 /*
SomeRandomBloke 0:b3e0f5bb3b87 234 * sendcmd
SomeRandomBloke 0:b3e0f5bb3b87 235 * Send a command to the ht1632 chip.
SomeRandomBloke 0:b3e0f5bb3b87 236 * A command consists of a 3-bit "CMD" ID, an 8bit command, and
SomeRandomBloke 0:b3e0f5bb3b87 237 * one "don't care bit".
SomeRandomBloke 0:b3e0f5bb3b87 238 * Select 1 0 0 c7 c6 c5 c4 c3 c2 c1 c0 xx Free
SomeRandomBloke 0:b3e0f5bb3b87 239 */
SomeRandomBloke 0:b3e0f5bb3b87 240 void HT1632_LedMatrix::sendcmd (uint8_t chipno, uint8_t command)
SomeRandomBloke 0:b3e0f5bb3b87 241 {
SomeRandomBloke 3:48f430fe186e 242 chipselect(chipno); // Select chip
SomeRandomBloke 3:48f430fe186e 243 writebits(HT1632_ID_CMD, 0x04); // send 3 bits of id: COMMMAND
SomeRandomBloke 3:48f430fe186e 244 writebits(command, 0x80); // send the actual command
SomeRandomBloke 3:48f430fe186e 245 writebits(0, 1); // one extra dont-care bit in commands.
SomeRandomBloke 3:48f430fe186e 246 chipfree(chipno); //done
SomeRandomBloke 0:b3e0f5bb3b87 247 }
SomeRandomBloke 0:b3e0f5bb3b87 248
SomeRandomBloke 0:b3e0f5bb3b87 249 /*
SomeRandomBloke 0:b3e0f5bb3b87 250 * clear
SomeRandomBloke 0:b3e0f5bb3b87 251 * clear the display, and the shadow memory, and the snapshot
SomeRandomBloke 0:b3e0f5bb3b87 252 * memory. This uses the "write multiple words" capability of
SomeRandomBloke 0:b3e0f5bb3b87 253 * the chipset by writing all 96 words of memory without raising
SomeRandomBloke 0:b3e0f5bb3b87 254 * the chipselect signal.
SomeRandomBloke 0:b3e0f5bb3b87 255 */
SomeRandomBloke 0:b3e0f5bb3b87 256 void HT1632_LedMatrix::clear()
SomeRandomBloke 0:b3e0f5bb3b87 257 {
SomeRandomBloke 3:48f430fe186e 258 char i;
SomeRandomBloke 0:b3e0f5bb3b87 259
SomeRandomBloke 3:48f430fe186e 260 for (uint8_t chipno=0; chipno<numDevices; chipno++) {
SomeRandomBloke 3:48f430fe186e 261 chipselect(chipno); // Select chip
SomeRandomBloke 3:48f430fe186e 262 writebits(HT1632_ID_WR, 0x04); // send ID: WRITE to RAM
SomeRandomBloke 3:48f430fe186e 263 writebits(0, 0x40); // Send address
SomeRandomBloke 9:8a3c981babd9 264 for (i = 0; i < displayWidth; i++) // Clear entire display
SomeRandomBloke 3:48f430fe186e 265 writedatabits(0, 8); // send 8 bits of data
SomeRandomBloke 3:48f430fe186e 266 chipfree(chipno); // done
SomeRandomBloke 3:48f430fe186e 267 for (i=0; i < 64; i++)
SomeRandomBloke 3:48f430fe186e 268 shadowram[i+64*chipno] = 0;
SomeRandomBloke 3:48f430fe186e 269 }
SomeRandomBloke 3:48f430fe186e 270 cursorX = 0;
SomeRandomBloke 3:48f430fe186e 271 cursorY = 0;
SomeRandomBloke 0:b3e0f5bb3b87 272 }
SomeRandomBloke 0:b3e0f5bb3b87 273
SomeRandomBloke 0:b3e0f5bb3b87 274
SomeRandomBloke 0:b3e0f5bb3b87 275 // Brighness is from 0 to 15
SomeRandomBloke 3:48f430fe186e 276 void HT1632_LedMatrix::setBrightness( unsigned char brightness )
SomeRandomBloke 3:48f430fe186e 277 {
SomeRandomBloke 3:48f430fe186e 278 for (uint8_t chipno=0; chipno<numDevices; chipno++) {
SomeRandomBloke 3:48f430fe186e 279 sendcmd(chipno, HT1632_CMD_PWM | (brightness & 0x0F ));
SomeRandomBloke 3:48f430fe186e 280 }
SomeRandomBloke 0:b3e0f5bb3b87 281 }
SomeRandomBloke 0:b3e0f5bb3b87 282
SomeRandomBloke 0:b3e0f5bb3b87 283
SomeRandomBloke 0:b3e0f5bb3b87 284 /*
SomeRandomBloke 0:b3e0f5bb3b87 285 * senddata
SomeRandomBloke 0:b3e0f5bb3b87 286 * send a nibble (4 bits) of data to a particular memory location of the
SomeRandomBloke 0:b3e0f5bb3b87 287 * ht1632. The command has 3 bit ID, 7 bits of address, and 4 bits of data.
SomeRandomBloke 0:b3e0f5bb3b87 288 * Select 1 0 1 A6 A5 A4 A3 A2 A1 A0 D0 D1 D2 D3 Free
SomeRandomBloke 0:b3e0f5bb3b87 289 * Note that the address is sent MSB first, while the data is sent LSB first!
SomeRandomBloke 0:b3e0f5bb3b87 290 * This means that somewhere a bit reversal will have to be done to get
SomeRandomBloke 0:b3e0f5bb3b87 291 * zero-based addressing of words and dots within words.
SomeRandomBloke 0:b3e0f5bb3b87 292 */
SomeRandomBloke 0:b3e0f5bb3b87 293 void HT1632_LedMatrix::senddata (uint8_t chipno, uint8_t address, uint8_t data)
SomeRandomBloke 0:b3e0f5bb3b87 294 {
SomeRandomBloke 3:48f430fe186e 295 chipselect(chipno); // Select chip
SomeRandomBloke 3:48f430fe186e 296 writebits(HT1632_ID_WR, 0x04); // send ID: WRITE to RAM
SomeRandomBloke 3:48f430fe186e 297 writebits(address, 0x40); // Send address
SomeRandomBloke 3:48f430fe186e 298 writedatabits(data, 4); // send 4 bits of data
SomeRandomBloke 3:48f430fe186e 299 chipfree(chipno); // done
SomeRandomBloke 0:b3e0f5bb3b87 300 }
SomeRandomBloke 0:b3e0f5bb3b87 301
SomeRandomBloke 0:b3e0f5bb3b87 302 /*
SomeRandomBloke 0:b3e0f5bb3b87 303 * sendcol
SomeRandomBloke 0:b3e0f5bb3b87 304 * send a byte of data to a particular memory location of the
SomeRandomBloke 0:b3e0f5bb3b87 305 * ht1632. The command has 3 bit ID, 7 bits of address, and 8 bits of data.
SomeRandomBloke 0:b3e0f5bb3b87 306 * Select 1 0 1 A6 A5 A4 A3 A2 A1 A0 D0 D1 D2 D3 D4 D5 D6 D7 D8 Free
SomeRandomBloke 0:b3e0f5bb3b87 307 * Note that the address is sent MSB first, while the data is sent LSB first!
SomeRandomBloke 0:b3e0f5bb3b87 308 * This means that somewhere a bit reversal will have to be done to get
SomeRandomBloke 0:b3e0f5bb3b87 309 * zero-based addressing of words and dots within words.
SomeRandomBloke 0:b3e0f5bb3b87 310 */
SomeRandomBloke 0:b3e0f5bb3b87 311 void HT1632_LedMatrix::sendcol (uint8_t chipno, uint8_t address, uint8_t data)
SomeRandomBloke 0:b3e0f5bb3b87 312 {
SomeRandomBloke 3:48f430fe186e 313 chipselect(chipno); // Select chip
SomeRandomBloke 3:48f430fe186e 314 writebits(HT1632_ID_WR, 0x04); // send ID: WRITE to RAM
SomeRandomBloke 3:48f430fe186e 315 writebits(address, 0x40); // Send address
SomeRandomBloke 3:48f430fe186e 316 writedatabits(data, 8); // send 8 bits of data
SomeRandomBloke 3:48f430fe186e 317 chipfree(chipno); // done
SomeRandomBloke 0:b3e0f5bb3b87 318 }
SomeRandomBloke 0:b3e0f5bb3b87 319
SomeRandomBloke 0:b3e0f5bb3b87 320 // Write a string at the position specified
SomeRandomBloke 4:7513dd37efed 321 // x and y start from 0 and count number of pixels, 2nd row on a 2 row display is y=8
SomeRandomBloke 3:48f430fe186e 322 void HT1632_LedMatrix::putString(int x, int y, char *str)
SomeRandomBloke 3:48f430fe186e 323 {
SomeRandomBloke 0:b3e0f5bb3b87 324 cursorX = x;
SomeRandomBloke 0:b3e0f5bb3b87 325 cursorY = y;
SomeRandomBloke 0:b3e0f5bb3b87 326 while( *str ) {
SomeRandomBloke 0:b3e0f5bb3b87 327 putChar( cursorX, y, *str++ );
SomeRandomBloke 0:b3e0f5bb3b87 328 }
SomeRandomBloke 0:b3e0f5bb3b87 329 }
SomeRandomBloke 0:b3e0f5bb3b87 330
SomeRandomBloke 0:b3e0f5bb3b87 331 /*
SomeRandomBloke 9:8a3c981babd9 332 * Copy a character glyph from the font data structure to
SomeRandomBloke 0:b3e0f5bb3b87 333 * display memory, with its upper left at the given coordinate
SomeRandomBloke 0:b3e0f5bb3b87 334 * This is unoptimized and simply uses plot() to draw each dot.
SomeRandomBloke 0:b3e0f5bb3b87 335 */
SomeRandomBloke 3:48f430fe186e 336 void HT1632_LedMatrix::write( uint8_t c)
SomeRandomBloke 3:48f430fe186e 337 {
SomeRandomBloke 3:48f430fe186e 338 putChar( cursorX, cursorY, (char)c );
SomeRandomBloke 0:b3e0f5bb3b87 339 }
SomeRandomBloke 0:b3e0f5bb3b87 340
SomeRandomBloke 0:b3e0f5bb3b87 341 /*
SomeRandomBloke 9:8a3c981babd9 342 * Copy a character glyph from the font data structure to
SomeRandomBloke 0:b3e0f5bb3b87 343 * display memory, with its upper left at the given coordinate
SomeRandomBloke 0:b3e0f5bb3b87 344 * This is unoptimized and simply uses plot() to draw each dot.
SomeRandomBloke 0:b3e0f5bb3b87 345 * returns number of columns that didn't fit
SomeRandomBloke 0:b3e0f5bb3b87 346 */
SomeRandomBloke 3:48f430fe186e 347 uint8_t HT1632_LedMatrix::putChar(int x, int y, char c)
SomeRandomBloke 3:48f430fe186e 348 {
SomeRandomBloke 3:48f430fe186e 349 // fonts defined for ascii 32 and beyond (index 0 in font array is ascii 32);
SomeRandomBloke 3:48f430fe186e 350 // CGRAM characters are in range 0 to 15 with 8-15 being repeat of 0-7
SomeRandomBloke 3:48f430fe186e 351 // note we force y to be modulo 8 - we do not support writing character to partial y values.
SomeRandomBloke 3:48f430fe186e 352
SomeRandomBloke 3:48f430fe186e 353 uint8_t charIndex;
SomeRandomBloke 3:48f430fe186e 354 uint8_t colData;
SomeRandomBloke 3:48f430fe186e 355 uint8_t numCols;
SomeRandomBloke 3:48f430fe186e 356 uint8_t chipno;
SomeRandomBloke 3:48f430fe186e 357 uint8_t addr;
SomeRandomBloke 3:48f430fe186e 358 uint8_t colsLeft = 0; // cols that didn't fit
SomeRandomBloke 3:48f430fe186e 359
SomeRandomBloke 3:48f430fe186e 360 if( c > 15 ) {
SomeRandomBloke 3:48f430fe186e 361 // Regular characters
SomeRandomBloke 3:48f430fe186e 362 // replace undisplayable characters with blank;
SomeRandomBloke 3:48f430fe186e 363 if (c < 32 || c > 126) {
SomeRandomBloke 3:48f430fe186e 364 charIndex = 0;
SomeRandomBloke 3:48f430fe186e 365 } else {
SomeRandomBloke 3:48f430fe186e 366 charIndex = c - 32;
SomeRandomBloke 3:48f430fe186e 367 }
SomeRandomBloke 0:b3e0f5bb3b87 368
SomeRandomBloke 3:48f430fe186e 369 // move character definition, pixel by pixel, onto the display;
SomeRandomBloke 3:48f430fe186e 370 // fonts are defined as one byte per col;
SomeRandomBloke 3:48f430fe186e 371 numCols=smallFont[charIndex][6]; // get the number of columns this character uses
SomeRandomBloke 3:48f430fe186e 372 for (uint8_t col=0; col<numCols; col++) {
SomeRandomBloke 3:48f430fe186e 373 colData = smallFont[charIndex][col];
SomeRandomBloke 3:48f430fe186e 374 chipno = chip_number(x,y);
SomeRandomBloke 3:48f430fe186e 375 addr = chip_byte_address(x,y); // compute which memory byte this is in
SomeRandomBloke 3:48f430fe186e 376 if (x <= xMax && y <= yMax) {
SomeRandomBloke 9:8a3c981babd9 377 shadowram[(addr>>1) + displayWidth * chipno] = colData;
SomeRandomBloke 3:48f430fe186e 378 sendcol(chipno,addr,colData);
SomeRandomBloke 3:48f430fe186e 379 x++;
SomeRandomBloke 3:48f430fe186e 380 } else {
SomeRandomBloke 3:48f430fe186e 381 colsLeft++;
SomeRandomBloke 3:48f430fe186e 382 }
SomeRandomBloke 3:48f430fe186e 383 }
SomeRandomBloke 0:b3e0f5bb3b87 384 } else {
SomeRandomBloke 3:48f430fe186e 385 // CGRAM Characters
SomeRandomBloke 3:48f430fe186e 386 charIndex = c & 0x07; // Only low 3 bits count
SomeRandomBloke 3:48f430fe186e 387 numCols=cgram[charIndex][0]; // get the number of columns this character uses
SomeRandomBloke 3:48f430fe186e 388 // fonts are defined as one byte per col;
SomeRandomBloke 3:48f430fe186e 389 for (uint8_t col=1; col<=numCols; col++) {
SomeRandomBloke 3:48f430fe186e 390 colData = cgram[charIndex][col];
SomeRandomBloke 3:48f430fe186e 391 chipno = chip_number(x,y);
SomeRandomBloke 3:48f430fe186e 392 addr = chip_byte_address(x,y); // compute which memory byte this is in
SomeRandomBloke 3:48f430fe186e 393 if (x <= xMax && y <= yMax) {
SomeRandomBloke 9:8a3c981babd9 394 shadowram[(addr>>1) + displayWidth * chipno] = colData;
SomeRandomBloke 3:48f430fe186e 395 sendcol(chipno,addr,colData);
SomeRandomBloke 3:48f430fe186e 396 x++;
SomeRandomBloke 3:48f430fe186e 397 } else {
SomeRandomBloke 3:48f430fe186e 398 colsLeft++;
SomeRandomBloke 3:48f430fe186e 399 }
SomeRandomBloke 3:48f430fe186e 400 }
SomeRandomBloke 0:b3e0f5bb3b87 401 }
SomeRandomBloke 0:b3e0f5bb3b87 402
SomeRandomBloke 3:48f430fe186e 403 cursorX = x;
SomeRandomBloke 3:48f430fe186e 404 cursorY = y;
SomeRandomBloke 0:b3e0f5bb3b87 405
SomeRandomBloke 3:48f430fe186e 406 return colsLeft;
SomeRandomBloke 0:b3e0f5bb3b87 407 }
SomeRandomBloke 0:b3e0f5bb3b87 408
SomeRandomBloke 0:b3e0f5bb3b87 409 // Set position of cursor for writing
SomeRandomBloke 3:48f430fe186e 410 void HT1632_LedMatrix::gotoXY(int x, int y)
SomeRandomBloke 3:48f430fe186e 411 {
SomeRandomBloke 0:b3e0f5bb3b87 412 cursorX = x;
SomeRandomBloke 0:b3e0f5bb3b87 413 cursorY = y;
SomeRandomBloke 0:b3e0f5bb3b87 414 }
SomeRandomBloke 0:b3e0f5bb3b87 415
SomeRandomBloke 0:b3e0f5bb3b87 416 void HT1632_LedMatrix::getXY(int* x, int* y)
SomeRandomBloke 0:b3e0f5bb3b87 417 {
SomeRandomBloke 0:b3e0f5bb3b87 418 *x = cursorX;
SomeRandomBloke 0:b3e0f5bb3b87 419 *y = cursorY;
SomeRandomBloke 0:b3e0f5bb3b87 420 }
SomeRandomBloke 0:b3e0f5bb3b87 421
SomeRandomBloke 0:b3e0f5bb3b87 422 void HT1632_LedMatrix::getXYMax(int* x, int* y)
SomeRandomBloke 0:b3e0f5bb3b87 423 {
SomeRandomBloke 0:b3e0f5bb3b87 424 *x = xMax;
SomeRandomBloke 0:b3e0f5bb3b87 425 *y = yMax;
SomeRandomBloke 0:b3e0f5bb3b87 426 }
SomeRandomBloke 0:b3e0f5bb3b87 427
SomeRandomBloke 0:b3e0f5bb3b87 428 // Shift cursor X position a number of positions either left or right.
SomeRandomBloke 3:48f430fe186e 429 void HT1632_LedMatrix::shiftCursorX(int xinc)
SomeRandomBloke 3:48f430fe186e 430 {
SomeRandomBloke 0:b3e0f5bb3b87 431 cursorX += xinc;
SomeRandomBloke 0:b3e0f5bb3b87 432 }
SomeRandomBloke 0:b3e0f5bb3b87 433
SomeRandomBloke 0:b3e0f5bb3b87 434
SomeRandomBloke 0:b3e0f5bb3b87 435 /*
SomeRandomBloke 0:b3e0f5bb3b87 436 * plot a point on the display, with the upper left hand corner
SomeRandomBloke 0:b3e0f5bb3b87 437 * being (0,0), and the lower right hand corner being (xMax-1, yMax-1).
SomeRandomBloke 0:b3e0f5bb3b87 438 * Note that Y increases going "downward" in contrast with most
SomeRandomBloke 0:b3e0f5bb3b87 439 * mathematical coordiate systems, but in common with many displays
SomeRandomBloke 0:b3e0f5bb3b87 440 * basic bounds checking used.
SomeRandomBloke 0:b3e0f5bb3b87 441 */
SomeRandomBloke 0:b3e0f5bb3b87 442 void HT1632_LedMatrix::plot (int x, int y, char val)
SomeRandomBloke 0:b3e0f5bb3b87 443 {
SomeRandomBloke 3:48f430fe186e 444 if (x<0 || x>xMax || y<0 || y>yMax)
SomeRandomBloke 3:48f430fe186e 445 return;
SomeRandomBloke 0:b3e0f5bb3b87 446
SomeRandomBloke 3:48f430fe186e 447 uint8_t chipno = chip_number(x,y);
SomeRandomBloke 3:48f430fe186e 448 char addr = chip_byte_address(x,y); // compute which memory word this is in
SomeRandomBloke 3:48f430fe186e 449 char shadowAddress = addr >>1;
SomeRandomBloke 0:b3e0f5bb3b87 450
SomeRandomBloke 3:48f430fe186e 451 char bitval = 1<<(y&7); // compute which bit will need set
SomeRandomBloke 0:b3e0f5bb3b87 452
SomeRandomBloke 3:48f430fe186e 453 if (val) { // Modify the shadow memory
SomeRandomBloke 9:8a3c981babd9 454 shadowram[shadowAddress + displayWidth * chipno] |= bitval;
SomeRandomBloke 3:48f430fe186e 455 } else {
SomeRandomBloke 9:8a3c981babd9 456 shadowram[shadowAddress + displayWidth * chipno] &= ~bitval;
SomeRandomBloke 3:48f430fe186e 457 }
SomeRandomBloke 3:48f430fe186e 458 // Now copy the new memory value to the display
SomeRandomBloke 9:8a3c981babd9 459 sendcol(chipno, addr, shadowram[shadowAddress + displayWidth * chipno]);
SomeRandomBloke 0:b3e0f5bb3b87 460 }
SomeRandomBloke 0:b3e0f5bb3b87 461
SomeRandomBloke 0:b3e0f5bb3b87 462
SomeRandomBloke 3:48f430fe186e 463 void HT1632_LedMatrix::setCustomChar( int charNum, unsigned char cgchar[] )
SomeRandomBloke 3:48f430fe186e 464 {
SomeRandomBloke 0:b3e0f5bb3b87 465 for(int i=1; i<7; i++ ) {
SomeRandomBloke 0:b3e0f5bb3b87 466 cgram[charNum][i] = (uint8_t)cgchar[i];
SomeRandomBloke 0:b3e0f5bb3b87 467 }
SomeRandomBloke 0:b3e0f5bb3b87 468 cgram[charNum][6] = 0;
SomeRandomBloke 0:b3e0f5bb3b87 469 cgram[charNum][0] = 6;
SomeRandomBloke 0:b3e0f5bb3b87 470 }
SomeRandomBloke 0:b3e0f5bb3b87 471
SomeRandomBloke 3:48f430fe186e 472 void HT1632_LedMatrix::setCustomChar( int charNum, unsigned char cgchar[], uint8_t numCols )
SomeRandomBloke 3:48f430fe186e 473 {
SomeRandomBloke 0:b3e0f5bb3b87 474 numCols = max(numCols, 6 );
SomeRandomBloke 0:b3e0f5bb3b87 475 for(int i=1; i<=numCols; i++ ) {
SomeRandomBloke 0:b3e0f5bb3b87 476 cgram[charNum][i] = (uint8_t)cgchar[i];
SomeRandomBloke 0:b3e0f5bb3b87 477 }
SomeRandomBloke 0:b3e0f5bb3b87 478 cgram[charNum][0] = numCols;
SomeRandomBloke 0:b3e0f5bb3b87 479 cgram[charNum][numCols] = 0;
SomeRandomBloke 0:b3e0f5bb3b87 480 }
SomeRandomBloke 0:b3e0f5bb3b87 481
SomeRandomBloke 4:7513dd37efed 482 void HT1632_LedMatrix::scrollLeft(uint8_t numberCols, uint8_t lineNum )
SomeRandomBloke 0:b3e0f5bb3b87 483 {
SomeRandomBloke 4:7513dd37efed 484
SomeRandomBloke 4:7513dd37efed 485 for (int i=0; i<xMax-numberCols; i++) {
SomeRandomBloke 4:7513dd37efed 486 shadowram[i]=shadowram[i+numberCols];
SomeRandomBloke 4:7513dd37efed 487 }
SomeRandomBloke 4:7513dd37efed 488 for (int i=xMax-numberCols; i<xMax; i++) {
SomeRandomBloke 4:7513dd37efed 489 shadowram[i]=0;
SomeRandomBloke 4:7513dd37efed 490 }
SomeRandomBloke 6:80f554fd77a0 491 /*
SomeRandomBloke 6:80f554fd77a0 492 for (int i=0; i<128-numberCols-1; i++) {
SomeRandomBloke 6:80f554fd77a0 493 shadowram[i]=shadowram[i+numberCols];
SomeRandomBloke 6:80f554fd77a0 494 }
SomeRandomBloke 6:80f554fd77a0 495 for (int i=128-numberCols; i<128; i++) {
SomeRandomBloke 6:80f554fd77a0 496 shadowram[i]=0;
SomeRandomBloke 6:80f554fd77a0 497 }
SomeRandomBloke 6:80f554fd77a0 498 */
SomeRandomBloke 0:b3e0f5bb3b87 499 cursorX -= numberCols;
SomeRandomBloke 0:b3e0f5bb3b87 500 if (cursorX < 0 ) cursorX = 0;
SomeRandomBloke 0:b3e0f5bb3b87 501 }
SomeRandomBloke 0:b3e0f5bb3b87 502
SomeRandomBloke 0:b3e0f5bb3b87 503 void HT1632_LedMatrix::putShadowRam()
SomeRandomBloke 0:b3e0f5bb3b87 504 {
SomeRandomBloke 0:b3e0f5bb3b87 505 for (int chipno=0; chipno<numDevices; chipno++)
SomeRandomBloke 0:b3e0f5bb3b87 506 putShadowRam(chipno);
SomeRandomBloke 0:b3e0f5bb3b87 507 }
SomeRandomBloke 0:b3e0f5bb3b87 508
SomeRandomBloke 0:b3e0f5bb3b87 509 void HT1632_LedMatrix::putShadowRam(uint8_t chipno)
SomeRandomBloke 0:b3e0f5bb3b87 510 {
SomeRandomBloke 3:48f430fe186e 511 for (int i=0; i<64; i+=2) {
SomeRandomBloke 9:8a3c981babd9 512 sendcol(chipno,i,shadowram[(i>>1)+ displayWidth * chipno]);
SomeRandomBloke 0:b3e0f5bb3b87 513 }
SomeRandomBloke 0:b3e0f5bb3b87 514 }
SomeRandomBloke 0:b3e0f5bb3b87 515
SomeRandomBloke 0:b3e0f5bb3b87 516 #ifdef USE_GRAPHIC
SomeRandomBloke 0:b3e0f5bb3b87 517 /*
SomeRandomBloke 0:b3e0f5bb3b87 518 * Name : drawLine
SomeRandomBloke 0:b3e0f5bb3b87 519 * Description : Draws a line between two points on the display.
SomeRandomBloke 0:b3e0f5bb3b87 520 * Argument(s) : x1, y1 - Absolute pixel coordinates for line origin.
SomeRandomBloke 0:b3e0f5bb3b87 521 * x2, y2 - Absolute pixel coordinates for line end.
SomeRandomBloke 0:b3e0f5bb3b87 522 * c - either PIXEL_ON, PIXEL_OFF
SomeRandomBloke 0:b3e0f5bb3b87 523 * Return value : none
SomeRandomBloke 0:b3e0f5bb3b87 524 */
SomeRandomBloke 0:b3e0f5bb3b87 525 void HT1632_LedMatrix::drawLine(unsigned char x1, unsigned char y1,
SomeRandomBloke 3:48f430fe186e 526 unsigned char x2, unsigned char y2, unsigned char c)
SomeRandomBloke 3:48f430fe186e 527 {
SomeRandomBloke 0:b3e0f5bb3b87 528 int dx, dy, stepx, stepy, fraction;
SomeRandomBloke 0:b3e0f5bb3b87 529
SomeRandomBloke 0:b3e0f5bb3b87 530 /* Calculate differential form */
SomeRandomBloke 0:b3e0f5bb3b87 531 /* dy y2 - y1 */
SomeRandomBloke 0:b3e0f5bb3b87 532 /* -- = ------- */
SomeRandomBloke 0:b3e0f5bb3b87 533 /* dx x2 - x1 */
SomeRandomBloke 0:b3e0f5bb3b87 534
SomeRandomBloke 0:b3e0f5bb3b87 535 /* Take differences */
SomeRandomBloke 0:b3e0f5bb3b87 536 dy = y2 - y1;
SomeRandomBloke 0:b3e0f5bb3b87 537 dx = x2 - x1;
SomeRandomBloke 0:b3e0f5bb3b87 538
SomeRandomBloke 0:b3e0f5bb3b87 539 /* dy is negative */
SomeRandomBloke 0:b3e0f5bb3b87 540 if ( dy < 0 ) {
SomeRandomBloke 0:b3e0f5bb3b87 541 dy = -dy;
SomeRandomBloke 0:b3e0f5bb3b87 542 stepy = -1;
SomeRandomBloke 0:b3e0f5bb3b87 543 } else {
SomeRandomBloke 0:b3e0f5bb3b87 544 stepy = 1;
SomeRandomBloke 0:b3e0f5bb3b87 545 }
SomeRandomBloke 0:b3e0f5bb3b87 546
SomeRandomBloke 0:b3e0f5bb3b87 547 /* dx is negative */
SomeRandomBloke 0:b3e0f5bb3b87 548 if ( dx < 0 ) {
SomeRandomBloke 0:b3e0f5bb3b87 549 dx = -dx;
SomeRandomBloke 0:b3e0f5bb3b87 550 stepx = -1;
SomeRandomBloke 0:b3e0f5bb3b87 551 } else {
SomeRandomBloke 0:b3e0f5bb3b87 552 stepx = 1;
SomeRandomBloke 0:b3e0f5bb3b87 553 }
SomeRandomBloke 0:b3e0f5bb3b87 554
SomeRandomBloke 0:b3e0f5bb3b87 555 dx <<= 1;
SomeRandomBloke 0:b3e0f5bb3b87 556 dy <<= 1;
SomeRandomBloke 0:b3e0f5bb3b87 557
SomeRandomBloke 0:b3e0f5bb3b87 558 /* Draw initial position */
SomeRandomBloke 0:b3e0f5bb3b87 559 plot( x1, y1, c );
SomeRandomBloke 0:b3e0f5bb3b87 560
SomeRandomBloke 0:b3e0f5bb3b87 561 /* Draw next positions until end */
SomeRandomBloke 0:b3e0f5bb3b87 562 if ( dx > dy ) {
SomeRandomBloke 0:b3e0f5bb3b87 563 /* Take fraction */
SomeRandomBloke 0:b3e0f5bb3b87 564 fraction = dy - ( dx >> 1);
SomeRandomBloke 0:b3e0f5bb3b87 565 while ( x1 != x2 ) {
SomeRandomBloke 0:b3e0f5bb3b87 566 if ( fraction >= 0 ) {
SomeRandomBloke 0:b3e0f5bb3b87 567 y1 += stepy;
SomeRandomBloke 0:b3e0f5bb3b87 568 fraction -= dx;
SomeRandomBloke 0:b3e0f5bb3b87 569 }
SomeRandomBloke 0:b3e0f5bb3b87 570 x1 += stepx;
SomeRandomBloke 0:b3e0f5bb3b87 571 fraction += dy;
SomeRandomBloke 0:b3e0f5bb3b87 572
SomeRandomBloke 0:b3e0f5bb3b87 573 /* Draw calculated point */
SomeRandomBloke 0:b3e0f5bb3b87 574 plot( x1, y1, c );
SomeRandomBloke 0:b3e0f5bb3b87 575 }
SomeRandomBloke 0:b3e0f5bb3b87 576 } else {
SomeRandomBloke 0:b3e0f5bb3b87 577 /* Take fraction */
SomeRandomBloke 0:b3e0f5bb3b87 578 fraction = dx - ( dy >> 1);
SomeRandomBloke 0:b3e0f5bb3b87 579 while ( y1 != y2 ) {
SomeRandomBloke 0:b3e0f5bb3b87 580 if ( fraction >= 0 ) {
SomeRandomBloke 0:b3e0f5bb3b87 581 x1 += stepx;
SomeRandomBloke 0:b3e0f5bb3b87 582 fraction -= dy;
SomeRandomBloke 0:b3e0f5bb3b87 583 }
SomeRandomBloke 0:b3e0f5bb3b87 584 y1 += stepy;
SomeRandomBloke 0:b3e0f5bb3b87 585 fraction += dx;
SomeRandomBloke 0:b3e0f5bb3b87 586
SomeRandomBloke 0:b3e0f5bb3b87 587 /* Draw calculated point */
SomeRandomBloke 0:b3e0f5bb3b87 588 plot( x1, y1, c );
SomeRandomBloke 0:b3e0f5bb3b87 589 }
SomeRandomBloke 0:b3e0f5bb3b87 590 }
SomeRandomBloke 0:b3e0f5bb3b87 591 }
SomeRandomBloke 0:b3e0f5bb3b87 592
SomeRandomBloke 0:b3e0f5bb3b87 593
SomeRandomBloke 0:b3e0f5bb3b87 594 /*
SomeRandomBloke 0:b3e0f5bb3b87 595 * Name : drawRectangle
SomeRandomBloke 0:b3e0f5bb3b87 596 * Description : Draw a rectangle given to top left and bottom right points
SomeRandomBloke 0:b3e0f5bb3b87 597 * Argument(s) : x1, y1 - Absolute pixel coordinates for top left corner
SomeRandomBloke 0:b3e0f5bb3b87 598 * x2, y2 - Absolute pixel coordinates for bottom right corner
SomeRandomBloke 3:48f430fe186e 599 * c - either PIXEL_ON, PIXEL_OFF
SomeRandomBloke 0:b3e0f5bb3b87 600 * Return value : none
SomeRandomBloke 0:b3e0f5bb3b87 601 */
SomeRandomBloke 0:b3e0f5bb3b87 602 void HT1632_LedMatrix::drawRectangle(unsigned char x1, unsigned char y1,
SomeRandomBloke 3:48f430fe186e 603 unsigned char x2, unsigned char y2, unsigned char c)
SomeRandomBloke 3:48f430fe186e 604 {
SomeRandomBloke 0:b3e0f5bb3b87 605 drawLine( x1, y1, x2, y1, c );
SomeRandomBloke 0:b3e0f5bb3b87 606 drawLine( x1, y1, x1, y2, c );
SomeRandomBloke 0:b3e0f5bb3b87 607 drawLine( x1, y2, x2, y2, c );
SomeRandomBloke 0:b3e0f5bb3b87 608 drawLine( x2, y1, x2, y2, c );
SomeRandomBloke 0:b3e0f5bb3b87 609 }
SomeRandomBloke 0:b3e0f5bb3b87 610
SomeRandomBloke 0:b3e0f5bb3b87 611
SomeRandomBloke 0:b3e0f5bb3b87 612 /*
SomeRandomBloke 0:b3e0f5bb3b87 613 * Name : drawFilledRectangle
SomeRandomBloke 0:b3e0f5bb3b87 614 * Description : Draw a filled rectangle given to top left and bottom right points
SomeRandomBloke 0:b3e0f5bb3b87 615 * just simply draws horizontal lines where the rectangle would be
SomeRandomBloke 0:b3e0f5bb3b87 616 * Argument(s) : x1, y1 - Absolute pixel coordinates for top left corner
SomeRandomBloke 0:b3e0f5bb3b87 617 * x2, y2 - Absolute pixel coordinates for bottom right corner
SomeRandomBloke 0:b3e0f5bb3b87 618 * c - either PIXEL_ON, PIXEL_OFF
SomeRandomBloke 0:b3e0f5bb3b87 619 * Return value : none
SomeRandomBloke 0:b3e0f5bb3b87 620 */
SomeRandomBloke 0:b3e0f5bb3b87 621 void HT1632_LedMatrix::drawFilledRectangle(unsigned char x1, unsigned char y1,
SomeRandomBloke 3:48f430fe186e 622 unsigned char x2, unsigned char y2, unsigned char c)
SomeRandomBloke 3:48f430fe186e 623 {
SomeRandomBloke 0:b3e0f5bb3b87 624 for(int i=y1; i <= y2; i++ ) {
SomeRandomBloke 0:b3e0f5bb3b87 625 drawLine( x1, i, x2, i, c );
SomeRandomBloke 0:b3e0f5bb3b87 626 }
SomeRandomBloke 0:b3e0f5bb3b87 627 }
SomeRandomBloke 0:b3e0f5bb3b87 628
SomeRandomBloke 0:b3e0f5bb3b87 629
SomeRandomBloke 0:b3e0f5bb3b87 630 /*
SomeRandomBloke 0:b3e0f5bb3b87 631 * Name : drawCircle
SomeRandomBloke 3:48f430fe186e 632 * Description : Draw a circle using Bresenham's algorithm.
SomeRandomBloke 0:b3e0f5bb3b87 633 * Some small circles will look like squares!!
SomeRandomBloke 0:b3e0f5bb3b87 634 * Argument(s) : xc, yc - Centre of circle
SomeRandomBloke 0:b3e0f5bb3b87 635 * r - Radius
SomeRandomBloke 0:b3e0f5bb3b87 636 * c - either PIXEL_ON, PIXEL_OFF
SomeRandomBloke 3:48f430fe186e 637 * Return value : None
SomeRandomBloke 0:b3e0f5bb3b87 638 */
SomeRandomBloke 0:b3e0f5bb3b87 639 void HT1632_LedMatrix::drawCircle(unsigned char xc, unsigned char yc,
SomeRandomBloke 3:48f430fe186e 640 unsigned char r, unsigned char c)
SomeRandomBloke 3:48f430fe186e 641 {
SomeRandomBloke 0:b3e0f5bb3b87 642 int x=0;
SomeRandomBloke 0:b3e0f5bb3b87 643 int y=r;
SomeRandomBloke 0:b3e0f5bb3b87 644 int p=3-(2*r);
SomeRandomBloke 0:b3e0f5bb3b87 645
SomeRandomBloke 3:48f430fe186e 646 plot( xc+x,yc-y, c);
SomeRandomBloke 0:b3e0f5bb3b87 647
SomeRandomBloke 3:48f430fe186e 648 for(x=0; x<=y; x++) {
SomeRandomBloke 0:b3e0f5bb3b87 649 if (p<0) {
SomeRandomBloke 0:b3e0f5bb3b87 650 y=y;
SomeRandomBloke 0:b3e0f5bb3b87 651 p=(p+(4*x)+6);
SomeRandomBloke 0:b3e0f5bb3b87 652 } else {
SomeRandomBloke 0:b3e0f5bb3b87 653 y=y-1;
SomeRandomBloke 0:b3e0f5bb3b87 654 p=p+((4*(x-y)+10));
SomeRandomBloke 0:b3e0f5bb3b87 655 }
SomeRandomBloke 0:b3e0f5bb3b87 656
SomeRandomBloke 0:b3e0f5bb3b87 657 plot(xc+x,yc-y, c);
SomeRandomBloke 0:b3e0f5bb3b87 658 plot(xc-x,yc-y, c);
SomeRandomBloke 0:b3e0f5bb3b87 659 plot(xc+x,yc+y, c);
SomeRandomBloke 0:b3e0f5bb3b87 660 plot(xc-x,yc+y, c);
SomeRandomBloke 0:b3e0f5bb3b87 661 plot(xc+y,yc-x, c);
SomeRandomBloke 0:b3e0f5bb3b87 662 plot(xc-y,yc-x, c);
SomeRandomBloke 0:b3e0f5bb3b87 663 plot(xc+y,yc+x, c);
SomeRandomBloke 0:b3e0f5bb3b87 664 plot(xc-y,yc+x, c);
SomeRandomBloke 0:b3e0f5bb3b87 665 }
SomeRandomBloke 0:b3e0f5bb3b87 666 }
SomeRandomBloke 0:b3e0f5bb3b87 667 #endif
SomeRandomBloke 0:b3e0f5bb3b87 668
SomeRandomBloke 0:b3e0f5bb3b87 669 // The end!