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@2:3e477c909f7a, 2012-11-09 (annotated)

Committer:
SomeRandomBloke
Date:
Fri Nov 09 08:54:37 2012 +0000
Revision:
2:3e477c909f7a
Parent:
1:96695118ee13
Child:
3:48f430fe186e
Clean up parts of library, remove AVR definitions

Who changed what in which revision?

UserRevisionLine numberNew contents of line
SomeRandomBloke 0:b3e0f5bb3b87 1 /***********************************************************************
SomeRandomBloke 2:3e477c909f7a 2 * HT1632_LedMatrix.cpp - Library for Holtek HT1632 LED driver chip,
SomeRandomBloke 0:b3e0f5bb3b87 3 * As implemented on the Sure Electronics DE-DP10X display board
SomeRandomBloke 0:b3e0f5bb3b87 4 * (8 x 32 dot matrix LED module.)
SomeRandomBloke 0:b3e0f5bb3b87 5 *
SomeRandomBloke 0:b3e0f5bb3b87 6 * Original code by:
SomeRandomBloke 0:b3e0f5bb3b87 7 * Nov, 2008 by Bill Westfield ("WestfW")
SomeRandomBloke 0:b3e0f5bb3b87 8 * Copyrighted and distributed under the terms of the Berkely license
SomeRandomBloke 0:b3e0f5bb3b87 9 * (copy freely, but include this notice of original author.)
SomeRandomBloke 0:b3e0f5bb3b87 10 *
SomeRandomBloke 0:b3e0f5bb3b87 11 * Adapted for 8x32 display by FlorinC.
SomeRandomBloke 0:b3e0f5bb3b87 12 *
SomeRandomBloke 2:3e477c909f7a 13 * Arduino Library Created and updated by Andrew Lindsay October/November 2009
SomeRandomBloke 2:3e477c909f7a 14 *
SomeRandomBloke 2:3e477c909f7a 15 * Ported to Mbed platform by Andrew Lindsay, November 2012
SomeRandomBloke 0:b3e0f5bb3b87 16 ***********************************************************************/
SomeRandomBloke 0:b3e0f5bb3b87 17
SomeRandomBloke 0:b3e0f5bb3b87 18 #include "mbed.h"
SomeRandomBloke 0:b3e0f5bb3b87 19 #include "HT1632_LedMatrix.h"
SomeRandomBloke 0:b3e0f5bb3b87 20 #include "font_5x7_p.h"
SomeRandomBloke 0:b3e0f5bb3b87 21
SomeRandomBloke 0:b3e0f5bb3b87 22 #define HIGH 1
SomeRandomBloke 0:b3e0f5bb3b87 23 #define LOW 0
SomeRandomBloke 0:b3e0f5bb3b87 24 /*
SomeRandomBloke 0:b3e0f5bb3b87 25 * Set these constants to the values of the pins connected to the SureElectronics Module
SomeRandomBloke 0:b3e0f5bb3b87 26 * NOTE - these are different from the original demo code by westfw
SomeRandomBloke 0:b3e0f5bb3b87 27 *
SomeRandomBloke 0:b3e0f5bb3b87 28 * Use Pin Mappings 8-11 for CS1 to 4, 12 for Data and 13 for Clock
SomeRandomBloke 0:b3e0f5bb3b87 29 * Use mixture of #define and variables.
SomeRandomBloke 0:b3e0f5bb3b87 30 * Pin numbers are for setup and port identifiers are for direct port writes.
SomeRandomBloke 0:b3e0f5bb3b87 31 */
SomeRandomBloke 0:b3e0f5bb3b87 32
SomeRandomBloke 0:b3e0f5bb3b87 33 // For mbed, use WR=p7, DATA=p5, cs1=p17, cs2=p18, cs3=p19, cs4=p20
SomeRandomBloke 0:b3e0f5bb3b87 34
SomeRandomBloke 0:b3e0f5bb3b87 35 DigitalOut ht1632_wrclk(p7); // For Test : Led1 is Clock
SomeRandomBloke 0:b3e0f5bb3b87 36 DigitalOut ht1632_data(p5); // Led2 is Data ....
SomeRandomBloke 0:b3e0f5bb3b87 37 DigitalOut ht1632_cs1(p17);
SomeRandomBloke 0:b3e0f5bb3b87 38 DigitalOut ht1632_cs2(p18);
SomeRandomBloke 0:b3e0f5bb3b87 39 DigitalOut ht1632_cs3(p19);
SomeRandomBloke 0:b3e0f5bb3b87 40 DigitalOut ht1632_cs4(p20);
SomeRandomBloke 0:b3e0f5bb3b87 41
SomeRandomBloke 2:3e477c909f7a 42 // CS pins 17, 18, 19, 20 used.
SomeRandomBloke 0:b3e0f5bb3b87 43 DigitalOut ht1632_cs[4] = {p17, p18, p19, p20}; // Chip Select (1, 2, 3, or 4)
SomeRandomBloke 0:b3e0f5bb3b87 44
SomeRandomBloke 0:b3e0f5bb3b87 45 // helper macros
SomeRandomBloke 0:b3e0f5bb3b87 46 #define chip_number(x,y) (x >> 5) + (y >> 3)*numYDevices
SomeRandomBloke 0:b3e0f5bb3b87 47 #define chip_nibble_address(x,y) ((x%32)<<1) + ((y%8)>>2);
SomeRandomBloke 0:b3e0f5bb3b87 48 #define chip_byte_address(x,y) ((x%32)<<1);
SomeRandomBloke 0:b3e0f5bb3b87 49 #define max(a, b) (((a) > (b)) ? (a) : (b))
SomeRandomBloke 0:b3e0f5bb3b87 50
SomeRandomBloke 0:b3e0f5bb3b87 51 // Display size and configuration, defaul is for a single 8x32 display
SomeRandomBloke 0:b3e0f5bb3b87 52 uint8_t numDevices = 1; // Total number of devices
SomeRandomBloke 0:b3e0f5bb3b87 53 uint8_t numXDevices = 1; // Number of horizontal devices
SomeRandomBloke 0:b3e0f5bb3b87 54 uint8_t numYDevices = 1; // Number of vertical devices
SomeRandomBloke 0:b3e0f5bb3b87 55 uint8_t xMax = 32 * numXDevices-1;
SomeRandomBloke 0:b3e0f5bb3b87 56 uint8_t yMax = 8 * numYDevices-1;
SomeRandomBloke 0:b3e0f5bb3b87 57
SomeRandomBloke 0:b3e0f5bb3b87 58 // Variables used to keep track of cursor position
SomeRandomBloke 0:b3e0f5bb3b87 59 int cursorX = 0;
SomeRandomBloke 0:b3e0f5bb3b87 60 int cursorY = 0;
SomeRandomBloke 0:b3e0f5bb3b87 61
SomeRandomBloke 0:b3e0f5bb3b87 62 /*
SomeRandomBloke 0:b3e0f5bb3b87 63 * we keep a copy of the display controller contents so that we can
SomeRandomBloke 0:b3e0f5bb3b87 64 * know which bits are on without having to (slowly) read the device.
SomeRandomBloke 0:b3e0f5bb3b87 65 */
SomeRandomBloke 0:b3e0f5bb3b87 66 // 4 boards at 32 bytes per board + 1 byte means we don't need to check overwrite in putChar
SomeRandomBloke 0:b3e0f5bb3b87 67 uint8_t shadowram[129]; // our copy of the display's RAM
SomeRandomBloke 0:b3e0f5bb3b87 68
SomeRandomBloke 0:b3e0f5bb3b87 69
SomeRandomBloke 0:b3e0f5bb3b87 70 // Custom character buffers - 8 characters available
SomeRandomBloke 0:b3e0f5bb3b87 71 // 6 cols * 8 rows - first byte of each char is the number of columns used
SomeRandomBloke 0:b3e0f5bb3b87 72 // Bits are aranged in columns with LSB at top
SomeRandomBloke 0:b3e0f5bb3b87 73 uint8_t cgram [8][7] = {
SomeRandomBloke 0:b3e0f5bb3b87 74 { 0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 },
SomeRandomBloke 0:b3e0f5bb3b87 75 { 0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 },
SomeRandomBloke 0:b3e0f5bb3b87 76 { 0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 },
SomeRandomBloke 0:b3e0f5bb3b87 77 { 0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 },
SomeRandomBloke 0:b3e0f5bb3b87 78 { 0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 },
SomeRandomBloke 0:b3e0f5bb3b87 79 { 0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 },
SomeRandomBloke 0:b3e0f5bb3b87 80 { 0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 },
SomeRandomBloke 0:b3e0f5bb3b87 81 { 0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 } };
SomeRandomBloke 0:b3e0f5bb3b87 82
SomeRandomBloke 0:b3e0f5bb3b87 83
SomeRandomBloke 0:b3e0f5bb3b87 84 // Default constructor
SomeRandomBloke 0:b3e0f5bb3b87 85 HT1632_LedMatrix::HT1632_LedMatrix( void ) {
SomeRandomBloke 0:b3e0f5bb3b87 86 }
SomeRandomBloke 0:b3e0f5bb3b87 87
SomeRandomBloke 0:b3e0f5bb3b87 88
SomeRandomBloke 0:b3e0f5bb3b87 89 void HT1632_LedMatrix::init( uint8_t xDevices, uint8_t yDevices ) {
SomeRandomBloke 0:b3e0f5bb3b87 90 // Set up the display size based on number of devices both horizontal and vertical
SomeRandomBloke 0:b3e0f5bb3b87 91 numXDevices = xDevices;
SomeRandomBloke 0:b3e0f5bb3b87 92 xMax = 32 * numXDevices-1;
SomeRandomBloke 0:b3e0f5bb3b87 93 numYDevices = yDevices;
SomeRandomBloke 0:b3e0f5bb3b87 94 yMax = 8 * numYDevices-1;
SomeRandomBloke 2:3e477c909f7a 95 numDevices = numXDevices * numYDevices;
SomeRandomBloke 0:b3e0f5bb3b87 96
SomeRandomBloke 1:96695118ee13 97 // Disable all display CS lines by taking high
SomeRandomBloke 1:96695118ee13 98 for( uint8_t i = 0; i < 4; i++ )
SomeRandomBloke 1:96695118ee13 99 ht1632_cs[i] = HIGH;
SomeRandomBloke 0:b3e0f5bb3b87 100
SomeRandomBloke 0:b3e0f5bb3b87 101 for (uint8_t chipno=0; chipno<numDevices; chipno++){
SomeRandomBloke 0:b3e0f5bb3b87 102 chipfree(chipno); // unselect it
SomeRandomBloke 0:b3e0f5bb3b87 103 sendcmd(chipno, HT1632_CMD_SYSDIS); // Disable system
SomeRandomBloke 0:b3e0f5bb3b87 104 sendcmd(chipno, HT1632_CMD_COMS10); // 08*32, PMOS drivers
SomeRandomBloke 0:b3e0f5bb3b87 105 sendcmd(chipno, HT1632_CMD_MSTMD); // Master Mode
SomeRandomBloke 0:b3e0f5bb3b87 106 sendcmd(chipno, HT1632_CMD_SYSON); // System on
SomeRandomBloke 0:b3e0f5bb3b87 107 sendcmd(chipno, HT1632_CMD_LEDON); // LEDs on
SomeRandomBloke 0:b3e0f5bb3b87 108 sendcmd(chipno, HT1632_CMD_PWM | 0x0c); // PWM Duty
SomeRandomBloke 0:b3e0f5bb3b87 109 for (uint8_t i=0; i<96; i++)
SomeRandomBloke 0:b3e0f5bb3b87 110 senddata(chipno, i, 0); // clear the display
SomeRandomBloke 0:b3e0f5bb3b87 111 wait(0.1);
SomeRandomBloke 0:b3e0f5bb3b87 112 }
SomeRandomBloke 0:b3e0f5bb3b87 113 cursorX = 0;
SomeRandomBloke 0:b3e0f5bb3b87 114 cursorY = 0;
SomeRandomBloke 0:b3e0f5bb3b87 115 }
SomeRandomBloke 0:b3e0f5bb3b87 116
SomeRandomBloke 0:b3e0f5bb3b87 117 /***********************************************************************
SomeRandomBloke 0:b3e0f5bb3b87 118 * chipselect / chipfree
SomeRandomBloke 0:b3e0f5bb3b87 119 * Select or de-select a particular ht1632 chip.
SomeRandomBloke 0:b3e0f5bb3b87 120 * De-selecting a chip ends the commands being sent to a chip.
SomeRandomBloke 0:b3e0f5bb3b87 121 * CD pins are active-low; writing 0 to the pin selects the chip.
SomeRandomBloke 0:b3e0f5bb3b87 122 ***********************************************************************/
SomeRandomBloke 0:b3e0f5bb3b87 123 void HT1632_LedMatrix::chipselect(uint8_t chipno)
SomeRandomBloke 0:b3e0f5bb3b87 124 {
SomeRandomBloke 0:b3e0f5bb3b87 125 ht1632_cs[chipno] = LOW;
SomeRandomBloke 0:b3e0f5bb3b87 126 }
SomeRandomBloke 0:b3e0f5bb3b87 127
SomeRandomBloke 0:b3e0f5bb3b87 128 void HT1632_LedMatrix::chipfree(uint8_t chipno)
SomeRandomBloke 0:b3e0f5bb3b87 129 {
SomeRandomBloke 0:b3e0f5bb3b87 130 ht1632_cs[chipno] = HIGH;
SomeRandomBloke 0:b3e0f5bb3b87 131 }
SomeRandomBloke 0:b3e0f5bb3b87 132
SomeRandomBloke 0:b3e0f5bb3b87 133 /*
SomeRandomBloke 0:b3e0f5bb3b87 134 * writebits
SomeRandomBloke 0:b3e0f5bb3b87 135 * Write bits to h1632 on pins HT1632_DATA, HT1632_WRCLK
SomeRandomBloke 0:b3e0f5bb3b87 136 * Chip is assumed to already be chip-selected
SomeRandomBloke 0:b3e0f5bb3b87 137 * Bits are shifted out from MSB to LSB, with the first bit sent
SomeRandomBloke 0:b3e0f5bb3b87 138 * being (bits & firstbit), shifted till firsbit is zero.
SomeRandomBloke 0:b3e0f5bb3b87 139 */
SomeRandomBloke 0:b3e0f5bb3b87 140 void HT1632_LedMatrix::writebits (uint8_t bits, uint8_t firstbit)
SomeRandomBloke 0:b3e0f5bb3b87 141 {
SomeRandomBloke 0:b3e0f5bb3b87 142 while (firstbit) {
SomeRandomBloke 0:b3e0f5bb3b87 143 ht1632_wrclk = LOW;
SomeRandomBloke 0:b3e0f5bb3b87 144 if (bits & firstbit) {
SomeRandomBloke 0:b3e0f5bb3b87 145 ht1632_data = HIGH;
SomeRandomBloke 0:b3e0f5bb3b87 146 } else {
SomeRandomBloke 0:b3e0f5bb3b87 147 ht1632_data = LOW;
SomeRandomBloke 0:b3e0f5bb3b87 148 }
SomeRandomBloke 0:b3e0f5bb3b87 149 ht1632_wrclk = HIGH;
SomeRandomBloke 0:b3e0f5bb3b87 150 firstbit >>= 1;
SomeRandomBloke 0:b3e0f5bb3b87 151 }
SomeRandomBloke 0:b3e0f5bb3b87 152 }
SomeRandomBloke 0:b3e0f5bb3b87 153
SomeRandomBloke 0:b3e0f5bb3b87 154 /*
SomeRandomBloke 0:b3e0f5bb3b87 155 * writedatabits
SomeRandomBloke 0:b3e0f5bb3b87 156 * Write databits to h1632 on pins HT1632_DATA, HT1632_WRCLK
SomeRandomBloke 0:b3e0f5bb3b87 157 * Chip is assumed to already be chip-selected
SomeRandomBloke 0:b3e0f5bb3b87 158 * Bits are shifted out from LSB to MSB
SomeRandomBloke 0:b3e0f5bb3b87 159 */
SomeRandomBloke 0:b3e0f5bb3b87 160 void HT1632_LedMatrix::writedatabits (uint8_t bits, uint8_t count)
SomeRandomBloke 0:b3e0f5bb3b87 161 {
SomeRandomBloke 0:b3e0f5bb3b87 162 while (count) {
SomeRandomBloke 0:b3e0f5bb3b87 163 ht1632_wrclk = LOW;
SomeRandomBloke 0:b3e0f5bb3b87 164 if (bits & 1) {
SomeRandomBloke 0:b3e0f5bb3b87 165 ht1632_data = HIGH;
SomeRandomBloke 0:b3e0f5bb3b87 166 } else {
SomeRandomBloke 0:b3e0f5bb3b87 167 ht1632_data = LOW;
SomeRandomBloke 0:b3e0f5bb3b87 168 }
SomeRandomBloke 0:b3e0f5bb3b87 169 ht1632_wrclk = HIGH;
SomeRandomBloke 0:b3e0f5bb3b87 170 count--;
SomeRandomBloke 0:b3e0f5bb3b87 171 bits >>= 1;
SomeRandomBloke 0:b3e0f5bb3b87 172 }
SomeRandomBloke 0:b3e0f5bb3b87 173 }
SomeRandomBloke 0:b3e0f5bb3b87 174
SomeRandomBloke 0:b3e0f5bb3b87 175 /*
SomeRandomBloke 0:b3e0f5bb3b87 176 * sendcmd
SomeRandomBloke 0:b3e0f5bb3b87 177 * Send a command to the ht1632 chip.
SomeRandomBloke 0:b3e0f5bb3b87 178 * A command consists of a 3-bit "CMD" ID, an 8bit command, and
SomeRandomBloke 0:b3e0f5bb3b87 179 * one "don't care bit".
SomeRandomBloke 0:b3e0f5bb3b87 180 * Select 1 0 0 c7 c6 c5 c4 c3 c2 c1 c0 xx Free
SomeRandomBloke 0:b3e0f5bb3b87 181 */
SomeRandomBloke 0:b3e0f5bb3b87 182 void HT1632_LedMatrix::sendcmd (uint8_t chipno, uint8_t command)
SomeRandomBloke 0:b3e0f5bb3b87 183 {
SomeRandomBloke 0:b3e0f5bb3b87 184 chipselect(chipno); // Select chip
SomeRandomBloke 0:b3e0f5bb3b87 185 writebits(HT1632_ID_CMD, 0x04); //1<<2); // send 3 bits of id: COMMMAND
SomeRandomBloke 0:b3e0f5bb3b87 186 writebits(command, 0x80); //1<<7); // send the actual command
SomeRandomBloke 0:b3e0f5bb3b87 187 writebits(0, 1); /* one extra dont-care bit in commands. */
SomeRandomBloke 0:b3e0f5bb3b87 188 chipfree(chipno); //done
SomeRandomBloke 0:b3e0f5bb3b87 189 }
SomeRandomBloke 0:b3e0f5bb3b87 190
SomeRandomBloke 0:b3e0f5bb3b87 191 /*
SomeRandomBloke 0:b3e0f5bb3b87 192 * clear
SomeRandomBloke 0:b3e0f5bb3b87 193 * clear the display, and the shadow memory, and the snapshot
SomeRandomBloke 0:b3e0f5bb3b87 194 * memory. This uses the "write multiple words" capability of
SomeRandomBloke 0:b3e0f5bb3b87 195 * the chipset by writing all 96 words of memory without raising
SomeRandomBloke 0:b3e0f5bb3b87 196 * the chipselect signal.
SomeRandomBloke 0:b3e0f5bb3b87 197 */
SomeRandomBloke 0:b3e0f5bb3b87 198 void HT1632_LedMatrix::clear()
SomeRandomBloke 0:b3e0f5bb3b87 199 {
SomeRandomBloke 0:b3e0f5bb3b87 200 char i;
SomeRandomBloke 0:b3e0f5bb3b87 201
SomeRandomBloke 0:b3e0f5bb3b87 202 for (uint8_t chipno=0; chipno<numDevices; chipno++){
SomeRandomBloke 0:b3e0f5bb3b87 203 chipselect(chipno); // Select chip
SomeRandomBloke 0:b3e0f5bb3b87 204 writebits(HT1632_ID_WR, 0x04); //1<<2); // send ID: WRITE to RAM
SomeRandomBloke 0:b3e0f5bb3b87 205 writebits(0, 0x40); //1<<6); // Send address
SomeRandomBloke 0:b3e0f5bb3b87 206 for (i = 0; i < 32; i++) // Clear entire display
SomeRandomBloke 0:b3e0f5bb3b87 207 writedatabits(0, 8); //1<<7); // send 8 bits of data
SomeRandomBloke 0:b3e0f5bb3b87 208 chipfree(chipno); // done
SomeRandomBloke 0:b3e0f5bb3b87 209 for (i=0; i < 64; i++)
SomeRandomBloke 0:b3e0f5bb3b87 210 shadowram[i+64*chipno] = 0;
SomeRandomBloke 0:b3e0f5bb3b87 211 }
SomeRandomBloke 0:b3e0f5bb3b87 212 cursorX = 0;
SomeRandomBloke 0:b3e0f5bb3b87 213 cursorY = 0;
SomeRandomBloke 0:b3e0f5bb3b87 214 }
SomeRandomBloke 0:b3e0f5bb3b87 215
SomeRandomBloke 0:b3e0f5bb3b87 216
SomeRandomBloke 0:b3e0f5bb3b87 217 // Brighness is from 0 to 15
SomeRandomBloke 0:b3e0f5bb3b87 218 void HT1632_LedMatrix::setBrightness( unsigned char brightness ) {
SomeRandomBloke 0:b3e0f5bb3b87 219 for (uint8_t chipno=0; chipno<numDevices; chipno++) {
SomeRandomBloke 0:b3e0f5bb3b87 220 sendcmd(chipno, HT1632_CMD_PWM | (brightness & 0x0F ));
SomeRandomBloke 0:b3e0f5bb3b87 221 }
SomeRandomBloke 0:b3e0f5bb3b87 222 }
SomeRandomBloke 0:b3e0f5bb3b87 223
SomeRandomBloke 0:b3e0f5bb3b87 224
SomeRandomBloke 0:b3e0f5bb3b87 225 /*
SomeRandomBloke 0:b3e0f5bb3b87 226 * senddata
SomeRandomBloke 0:b3e0f5bb3b87 227 * send a nibble (4 bits) of data to a particular memory location of the
SomeRandomBloke 0:b3e0f5bb3b87 228 * ht1632. The command has 3 bit ID, 7 bits of address, and 4 bits of data.
SomeRandomBloke 0:b3e0f5bb3b87 229 * Select 1 0 1 A6 A5 A4 A3 A2 A1 A0 D0 D1 D2 D3 Free
SomeRandomBloke 0:b3e0f5bb3b87 230 * Note that the address is sent MSB first, while the data is sent LSB first!
SomeRandomBloke 0:b3e0f5bb3b87 231 * This means that somewhere a bit reversal will have to be done to get
SomeRandomBloke 0:b3e0f5bb3b87 232 * zero-based addressing of words and dots within words.
SomeRandomBloke 0:b3e0f5bb3b87 233 */
SomeRandomBloke 0:b3e0f5bb3b87 234 void HT1632_LedMatrix::senddata (uint8_t chipno, uint8_t address, uint8_t data)
SomeRandomBloke 0:b3e0f5bb3b87 235 {
SomeRandomBloke 0:b3e0f5bb3b87 236 chipselect(chipno); // Select chip
SomeRandomBloke 0:b3e0f5bb3b87 237 writebits(HT1632_ID_WR, 0x04); //1<<2); // send ID: WRITE to RAM
SomeRandomBloke 0:b3e0f5bb3b87 238 writebits(address, 0x40); //1<<6); // Send address
SomeRandomBloke 0:b3e0f5bb3b87 239 writedatabits(data, 4); //1<<3); // send 4 bits of data
SomeRandomBloke 0:b3e0f5bb3b87 240 chipfree(chipno); // done
SomeRandomBloke 0:b3e0f5bb3b87 241 }
SomeRandomBloke 0:b3e0f5bb3b87 242
SomeRandomBloke 0:b3e0f5bb3b87 243 /*
SomeRandomBloke 0:b3e0f5bb3b87 244 * sendcol
SomeRandomBloke 0:b3e0f5bb3b87 245 * send a byte of data to a particular memory location of the
SomeRandomBloke 0:b3e0f5bb3b87 246 * ht1632. The command has 3 bit ID, 7 bits of address, and 8 bits of data.
SomeRandomBloke 0:b3e0f5bb3b87 247 * Select 1 0 1 A6 A5 A4 A3 A2 A1 A0 D0 D1 D2 D3 D4 D5 D6 D7 D8 Free
SomeRandomBloke 0:b3e0f5bb3b87 248 * Note that the address is sent MSB first, while the data is sent LSB first!
SomeRandomBloke 0:b3e0f5bb3b87 249 * This means that somewhere a bit reversal will have to be done to get
SomeRandomBloke 0:b3e0f5bb3b87 250 * zero-based addressing of words and dots within words.
SomeRandomBloke 0:b3e0f5bb3b87 251 */
SomeRandomBloke 0:b3e0f5bb3b87 252 void HT1632_LedMatrix::sendcol (uint8_t chipno, uint8_t address, uint8_t data)
SomeRandomBloke 0:b3e0f5bb3b87 253 {
SomeRandomBloke 0:b3e0f5bb3b87 254 chipselect(chipno); // Select chip
SomeRandomBloke 0:b3e0f5bb3b87 255 writebits(HT1632_ID_WR, 0x04); //1<<2); // send ID: WRITE to RAM
SomeRandomBloke 0:b3e0f5bb3b87 256 writebits(address, 0x40); //1<<6); // Send address
SomeRandomBloke 0:b3e0f5bb3b87 257 writedatabits(data, 8); // send 8 bits of data
SomeRandomBloke 0:b3e0f5bb3b87 258 chipfree(chipno); // done
SomeRandomBloke 0:b3e0f5bb3b87 259 }
SomeRandomBloke 0:b3e0f5bb3b87 260
SomeRandomBloke 0:b3e0f5bb3b87 261 // Write a string at the position specified
SomeRandomBloke 0:b3e0f5bb3b87 262 void HT1632_LedMatrix::putString(int x, int y, char *str) {
SomeRandomBloke 0:b3e0f5bb3b87 263 cursorX = x;
SomeRandomBloke 0:b3e0f5bb3b87 264 cursorY = y;
SomeRandomBloke 0:b3e0f5bb3b87 265 while( *str ) {
SomeRandomBloke 0:b3e0f5bb3b87 266 putChar( cursorX, y, *str++ );
SomeRandomBloke 0:b3e0f5bb3b87 267 cursorX += 6;
SomeRandomBloke 0:b3e0f5bb3b87 268 }
SomeRandomBloke 0:b3e0f5bb3b87 269 }
SomeRandomBloke 0:b3e0f5bb3b87 270
SomeRandomBloke 0:b3e0f5bb3b87 271 /*
SomeRandomBloke 0:b3e0f5bb3b87 272 * Copy a character glyph from the smallFont data structure to
SomeRandomBloke 0:b3e0f5bb3b87 273 * display memory, with its upper left at the given coordinate
SomeRandomBloke 0:b3e0f5bb3b87 274 * This is unoptimized and simply uses plot() to draw each dot.
SomeRandomBloke 0:b3e0f5bb3b87 275 */
SomeRandomBloke 0:b3e0f5bb3b87 276 void HT1632_LedMatrix::write( uint8_t c) {
SomeRandomBloke 0:b3e0f5bb3b87 277 putChar( cursorX, cursorY, (char)c );
SomeRandomBloke 0:b3e0f5bb3b87 278 }
SomeRandomBloke 0:b3e0f5bb3b87 279
SomeRandomBloke 0:b3e0f5bb3b87 280 /*
SomeRandomBloke 0:b3e0f5bb3b87 281 * Copy a character glyph from the myfont data structure to
SomeRandomBloke 0:b3e0f5bb3b87 282 * display memory, with its upper left at the given coordinate
SomeRandomBloke 0:b3e0f5bb3b87 283 * This is unoptimized and simply uses plot() to draw each dot.
SomeRandomBloke 0:b3e0f5bb3b87 284 * returns number of columns that didn't fit
SomeRandomBloke 0:b3e0f5bb3b87 285 */
SomeRandomBloke 0:b3e0f5bb3b87 286 uint8_t HT1632_LedMatrix::putChar(int x, int y, char c) {
SomeRandomBloke 0:b3e0f5bb3b87 287 // fonts defined for ascii 32 and beyond (index 0 in font array is ascii 32);
SomeRandomBloke 0:b3e0f5bb3b87 288 // CGRAM characters are in range 0 to 15 with 8-15 being repeat of 0-7
SomeRandomBloke 0:b3e0f5bb3b87 289 // note we force y to be modulo 8 - we do not support writing character to partial y values.
SomeRandomBloke 0:b3e0f5bb3b87 290
SomeRandomBloke 0:b3e0f5bb3b87 291 uint8_t charIndex;
SomeRandomBloke 0:b3e0f5bb3b87 292 uint8_t colData;
SomeRandomBloke 0:b3e0f5bb3b87 293 uint8_t numCols;
SomeRandomBloke 0:b3e0f5bb3b87 294 uint8_t chipno;
SomeRandomBloke 0:b3e0f5bb3b87 295 uint8_t addr;
SomeRandomBloke 0:b3e0f5bb3b87 296 uint8_t colsLeft = 0; // cols that didn't fit
SomeRandomBloke 0:b3e0f5bb3b87 297
SomeRandomBloke 0:b3e0f5bb3b87 298 if( c > 15 ) {
SomeRandomBloke 0:b3e0f5bb3b87 299 // Regular characters
SomeRandomBloke 0:b3e0f5bb3b87 300 // replace undisplayable characters with blank;
SomeRandomBloke 0:b3e0f5bb3b87 301 if (c < 32 || c > 126) {
SomeRandomBloke 0:b3e0f5bb3b87 302 charIndex = 0;
SomeRandomBloke 0:b3e0f5bb3b87 303 } else {
SomeRandomBloke 0:b3e0f5bb3b87 304 charIndex = c - 32;
SomeRandomBloke 0:b3e0f5bb3b87 305 }
SomeRandomBloke 0:b3e0f5bb3b87 306
SomeRandomBloke 0:b3e0f5bb3b87 307 // move character definition, pixel by pixel, onto the display;
SomeRandomBloke 0:b3e0f5bb3b87 308 // fonts are defined as one byte per col;
SomeRandomBloke 0:b3e0f5bb3b87 309 numCols=smallFont[charIndex][6]; // get the number of columns this character uses
SomeRandomBloke 0:b3e0f5bb3b87 310 for (uint8_t col=0; col<numCols; col++) {
SomeRandomBloke 0:b3e0f5bb3b87 311 colData = smallFont[charIndex][col];
SomeRandomBloke 0:b3e0f5bb3b87 312 chipno = chip_number(x,y);
SomeRandomBloke 0:b3e0f5bb3b87 313 addr = chip_byte_address(x,y); // compute which memory byte this is in
SomeRandomBloke 0:b3e0f5bb3b87 314 if (x <= xMax && y <= yMax) {
SomeRandomBloke 0:b3e0f5bb3b87 315 shadowram[(addr>>1)+32*chipno] = colData;
SomeRandomBloke 0:b3e0f5bb3b87 316 sendcol(chipno,addr,colData);
SomeRandomBloke 0:b3e0f5bb3b87 317 x++;
SomeRandomBloke 0:b3e0f5bb3b87 318 } else {
SomeRandomBloke 0:b3e0f5bb3b87 319 colsLeft++;
SomeRandomBloke 0:b3e0f5bb3b87 320 }
SomeRandomBloke 0:b3e0f5bb3b87 321 }
SomeRandomBloke 0:b3e0f5bb3b87 322 } else {
SomeRandomBloke 0:b3e0f5bb3b87 323 // CGRAM Characters
SomeRandomBloke 0:b3e0f5bb3b87 324 charIndex = c & 0x07; // Only low 3 bits count
SomeRandomBloke 0:b3e0f5bb3b87 325 numCols=cgram[charIndex][0]; // get the number of columns this character uses
SomeRandomBloke 0:b3e0f5bb3b87 326 // fonts are defined as one byte per col;
SomeRandomBloke 0:b3e0f5bb3b87 327 for (uint8_t col=1; col<=numCols; col++) {
SomeRandomBloke 0:b3e0f5bb3b87 328 colData = cgram[charIndex][col];
SomeRandomBloke 0:b3e0f5bb3b87 329 chipno = chip_number(x,y);
SomeRandomBloke 0:b3e0f5bb3b87 330 addr = chip_byte_address(x,y); // compute which memory byte this is in
SomeRandomBloke 0:b3e0f5bb3b87 331 if (x <= xMax && y <= yMax) {
SomeRandomBloke 0:b3e0f5bb3b87 332 shadowram[(addr>>1)+32*chipno] = colData;
SomeRandomBloke 0:b3e0f5bb3b87 333 sendcol(chipno,addr,colData);
SomeRandomBloke 0:b3e0f5bb3b87 334 x++;
SomeRandomBloke 0:b3e0f5bb3b87 335 } else {
SomeRandomBloke 0:b3e0f5bb3b87 336 colsLeft++;
SomeRandomBloke 0:b3e0f5bb3b87 337 }
SomeRandomBloke 0:b3e0f5bb3b87 338 }
SomeRandomBloke 0:b3e0f5bb3b87 339 }
SomeRandomBloke 0:b3e0f5bb3b87 340
SomeRandomBloke 0:b3e0f5bb3b87 341 cursorX = x;
SomeRandomBloke 0:b3e0f5bb3b87 342 cursorY = y;
SomeRandomBloke 0:b3e0f5bb3b87 343
SomeRandomBloke 0:b3e0f5bb3b87 344 return colsLeft;
SomeRandomBloke 0:b3e0f5bb3b87 345 }
SomeRandomBloke 0:b3e0f5bb3b87 346
SomeRandomBloke 0:b3e0f5bb3b87 347 // Set position of cursor for writing
SomeRandomBloke 0:b3e0f5bb3b87 348 void HT1632_LedMatrix::gotoXY(int x, int y) {
SomeRandomBloke 0:b3e0f5bb3b87 349 cursorX = x;
SomeRandomBloke 0:b3e0f5bb3b87 350 cursorY = y;
SomeRandomBloke 0:b3e0f5bb3b87 351 }
SomeRandomBloke 0:b3e0f5bb3b87 352
SomeRandomBloke 0:b3e0f5bb3b87 353 void HT1632_LedMatrix::getXY(int* x, int* y)
SomeRandomBloke 0:b3e0f5bb3b87 354 {
SomeRandomBloke 0:b3e0f5bb3b87 355 *x = cursorX;
SomeRandomBloke 0:b3e0f5bb3b87 356 *y = cursorY;
SomeRandomBloke 0:b3e0f5bb3b87 357 }
SomeRandomBloke 0:b3e0f5bb3b87 358
SomeRandomBloke 0:b3e0f5bb3b87 359 void HT1632_LedMatrix::getXYMax(int* x, int* y)
SomeRandomBloke 0:b3e0f5bb3b87 360 {
SomeRandomBloke 0:b3e0f5bb3b87 361 *x = xMax;
SomeRandomBloke 0:b3e0f5bb3b87 362 *y = yMax;
SomeRandomBloke 0:b3e0f5bb3b87 363 }
SomeRandomBloke 0:b3e0f5bb3b87 364
SomeRandomBloke 0:b3e0f5bb3b87 365 // Shift cursor X position a number of positions either left or right.
SomeRandomBloke 0:b3e0f5bb3b87 366 void HT1632_LedMatrix::shiftCursorX(int xinc) {
SomeRandomBloke 0:b3e0f5bb3b87 367 cursorX += xinc;
SomeRandomBloke 0:b3e0f5bb3b87 368 }
SomeRandomBloke 0:b3e0f5bb3b87 369
SomeRandomBloke 0:b3e0f5bb3b87 370
SomeRandomBloke 0:b3e0f5bb3b87 371 /*
SomeRandomBloke 0:b3e0f5bb3b87 372 * plot a point on the display, with the upper left hand corner
SomeRandomBloke 0:b3e0f5bb3b87 373 * being (0,0), and the lower right hand corner being (xMax-1, yMax-1).
SomeRandomBloke 0:b3e0f5bb3b87 374 * Note that Y increases going "downward" in contrast with most
SomeRandomBloke 0:b3e0f5bb3b87 375 * mathematical coordiate systems, but in common with many displays
SomeRandomBloke 0:b3e0f5bb3b87 376 * basic bounds checking used.
SomeRandomBloke 0:b3e0f5bb3b87 377 */
SomeRandomBloke 0:b3e0f5bb3b87 378 void HT1632_LedMatrix::plot (int x, int y, char val)
SomeRandomBloke 0:b3e0f5bb3b87 379 {
SomeRandomBloke 0:b3e0f5bb3b87 380 if (x<0 || x>xMax || y<0 || y>yMax)
SomeRandomBloke 0:b3e0f5bb3b87 381 return;
SomeRandomBloke 0:b3e0f5bb3b87 382
SomeRandomBloke 0:b3e0f5bb3b87 383 uint8_t chipno = chip_number(x,y);
SomeRandomBloke 0:b3e0f5bb3b87 384 char addr = chip_byte_address(x,y); // compute which memory word this is in
SomeRandomBloke 0:b3e0f5bb3b87 385 char shadowAddress = addr >>1;
SomeRandomBloke 0:b3e0f5bb3b87 386
SomeRandomBloke 0:b3e0f5bb3b87 387 char bitval = 1<<(y&7); // compute which bit will need set
SomeRandomBloke 0:b3e0f5bb3b87 388
SomeRandomBloke 0:b3e0f5bb3b87 389
SomeRandomBloke 0:b3e0f5bb3b87 390 if (val) { // Modify the shadow memory
SomeRandomBloke 0:b3e0f5bb3b87 391 shadowram[shadowAddress +32*chipno] |= bitval;
SomeRandomBloke 0:b3e0f5bb3b87 392 }
SomeRandomBloke 0:b3e0f5bb3b87 393 else {
SomeRandomBloke 0:b3e0f5bb3b87 394 shadowram[shadowAddress +32*chipno] &= ~bitval;
SomeRandomBloke 0:b3e0f5bb3b87 395 }
SomeRandomBloke 0:b3e0f5bb3b87 396 // Now copy the new memory value to the display
SomeRandomBloke 0:b3e0f5bb3b87 397 sendcol(chipno, addr, shadowram[shadowAddress +32*chipno]);
SomeRandomBloke 0:b3e0f5bb3b87 398 }
SomeRandomBloke 0:b3e0f5bb3b87 399
SomeRandomBloke 0:b3e0f5bb3b87 400
SomeRandomBloke 0:b3e0f5bb3b87 401 void HT1632_LedMatrix::setCustomChar( int charNum, unsigned char cgchar[] ) {
SomeRandomBloke 0:b3e0f5bb3b87 402 for(int i=1; i<7; i++ ) {
SomeRandomBloke 0:b3e0f5bb3b87 403 cgram[charNum][i] = (uint8_t)cgchar[i];
SomeRandomBloke 0:b3e0f5bb3b87 404 }
SomeRandomBloke 0:b3e0f5bb3b87 405 cgram[charNum][6] = 0;
SomeRandomBloke 0:b3e0f5bb3b87 406 cgram[charNum][0] = 6;
SomeRandomBloke 0:b3e0f5bb3b87 407 }
SomeRandomBloke 0:b3e0f5bb3b87 408
SomeRandomBloke 0:b3e0f5bb3b87 409 void HT1632_LedMatrix::setCustomChar( int charNum, unsigned char cgchar[], uint8_t numCols ) {
SomeRandomBloke 0:b3e0f5bb3b87 410 numCols = max(numCols, 6 );
SomeRandomBloke 0:b3e0f5bb3b87 411 for(int i=1; i<=numCols; i++ ) {
SomeRandomBloke 0:b3e0f5bb3b87 412 cgram[charNum][i] = (uint8_t)cgchar[i];
SomeRandomBloke 0:b3e0f5bb3b87 413 }
SomeRandomBloke 0:b3e0f5bb3b87 414 cgram[charNum][0] = numCols;
SomeRandomBloke 0:b3e0f5bb3b87 415 cgram[charNum][numCols] = 0;
SomeRandomBloke 0:b3e0f5bb3b87 416 }
SomeRandomBloke 0:b3e0f5bb3b87 417
SomeRandomBloke 0:b3e0f5bb3b87 418 void HT1632_LedMatrix::scrollLeft(uint8_t numberCols)
SomeRandomBloke 0:b3e0f5bb3b87 419 {
SomeRandomBloke 0:b3e0f5bb3b87 420 for (int i=0; i<128-numberCols-1; i++)
SomeRandomBloke 0:b3e0f5bb3b87 421 {
SomeRandomBloke 0:b3e0f5bb3b87 422 shadowram[i]=shadowram[i+numberCols];
SomeRandomBloke 0:b3e0f5bb3b87 423 }
SomeRandomBloke 0:b3e0f5bb3b87 424 for (int i=128-numberCols; i<128; i++)
SomeRandomBloke 0:b3e0f5bb3b87 425 {
SomeRandomBloke 0:b3e0f5bb3b87 426 shadowram[i]=0;
SomeRandomBloke 0:b3e0f5bb3b87 427 }
SomeRandomBloke 0:b3e0f5bb3b87 428 cursorX -= numberCols;
SomeRandomBloke 0:b3e0f5bb3b87 429 if (cursorX < 0 ) cursorX = 0;
SomeRandomBloke 0:b3e0f5bb3b87 430 }
SomeRandomBloke 0:b3e0f5bb3b87 431
SomeRandomBloke 0:b3e0f5bb3b87 432 void HT1632_LedMatrix::putShadowRam()
SomeRandomBloke 0:b3e0f5bb3b87 433 {
SomeRandomBloke 0:b3e0f5bb3b87 434 for (int chipno=0; chipno<numDevices; chipno++)
SomeRandomBloke 0:b3e0f5bb3b87 435 putShadowRam(chipno);
SomeRandomBloke 0:b3e0f5bb3b87 436 }
SomeRandomBloke 0:b3e0f5bb3b87 437
SomeRandomBloke 0:b3e0f5bb3b87 438 void HT1632_LedMatrix::putShadowRam(uint8_t chipno)
SomeRandomBloke 0:b3e0f5bb3b87 439 {
SomeRandomBloke 0:b3e0f5bb3b87 440 for (int i=0; i<64; i+=2)
SomeRandomBloke 0:b3e0f5bb3b87 441 {
SomeRandomBloke 0:b3e0f5bb3b87 442 sendcol(chipno,i,shadowram[(i>>1)+32*chipno]);
SomeRandomBloke 0:b3e0f5bb3b87 443 }
SomeRandomBloke 0:b3e0f5bb3b87 444 }
SomeRandomBloke 0:b3e0f5bb3b87 445
SomeRandomBloke 0:b3e0f5bb3b87 446 #ifdef USE_GRAPHIC
SomeRandomBloke 0:b3e0f5bb3b87 447 /*
SomeRandomBloke 0:b3e0f5bb3b87 448 * Name : drawLine
SomeRandomBloke 0:b3e0f5bb3b87 449 * Description : Draws a line between two points on the display.
SomeRandomBloke 0:b3e0f5bb3b87 450 * Argument(s) : x1, y1 - Absolute pixel coordinates for line origin.
SomeRandomBloke 0:b3e0f5bb3b87 451 * x2, y2 - Absolute pixel coordinates for line end.
SomeRandomBloke 0:b3e0f5bb3b87 452 * c - either PIXEL_ON, PIXEL_OFF
SomeRandomBloke 0:b3e0f5bb3b87 453 * Return value : none
SomeRandomBloke 0:b3e0f5bb3b87 454 */
SomeRandomBloke 0:b3e0f5bb3b87 455 void HT1632_LedMatrix::drawLine(unsigned char x1, unsigned char y1,
SomeRandomBloke 0:b3e0f5bb3b87 456 unsigned char x2, unsigned char y2, unsigned char c) {
SomeRandomBloke 0:b3e0f5bb3b87 457 int dx, dy, stepx, stepy, fraction;
SomeRandomBloke 0:b3e0f5bb3b87 458
SomeRandomBloke 0:b3e0f5bb3b87 459 /* Calculate differential form */
SomeRandomBloke 0:b3e0f5bb3b87 460 /* dy y2 - y1 */
SomeRandomBloke 0:b3e0f5bb3b87 461 /* -- = ------- */
SomeRandomBloke 0:b3e0f5bb3b87 462 /* dx x2 - x1 */
SomeRandomBloke 0:b3e0f5bb3b87 463
SomeRandomBloke 0:b3e0f5bb3b87 464 /* Take differences */
SomeRandomBloke 0:b3e0f5bb3b87 465 dy = y2 - y1;
SomeRandomBloke 0:b3e0f5bb3b87 466 dx = x2 - x1;
SomeRandomBloke 0:b3e0f5bb3b87 467
SomeRandomBloke 0:b3e0f5bb3b87 468 /* dy is negative */
SomeRandomBloke 0:b3e0f5bb3b87 469 if ( dy < 0 ) {
SomeRandomBloke 0:b3e0f5bb3b87 470 dy = -dy;
SomeRandomBloke 0:b3e0f5bb3b87 471 stepy = -1;
SomeRandomBloke 0:b3e0f5bb3b87 472 } else {
SomeRandomBloke 0:b3e0f5bb3b87 473 stepy = 1;
SomeRandomBloke 0:b3e0f5bb3b87 474 }
SomeRandomBloke 0:b3e0f5bb3b87 475
SomeRandomBloke 0:b3e0f5bb3b87 476 /* dx is negative */
SomeRandomBloke 0:b3e0f5bb3b87 477 if ( dx < 0 ) {
SomeRandomBloke 0:b3e0f5bb3b87 478 dx = -dx;
SomeRandomBloke 0:b3e0f5bb3b87 479 stepx = -1;
SomeRandomBloke 0:b3e0f5bb3b87 480 } else {
SomeRandomBloke 0:b3e0f5bb3b87 481 stepx = 1;
SomeRandomBloke 0:b3e0f5bb3b87 482 }
SomeRandomBloke 0:b3e0f5bb3b87 483
SomeRandomBloke 0:b3e0f5bb3b87 484 dx <<= 1;
SomeRandomBloke 0:b3e0f5bb3b87 485 dy <<= 1;
SomeRandomBloke 0:b3e0f5bb3b87 486
SomeRandomBloke 0:b3e0f5bb3b87 487 /* Draw initial position */
SomeRandomBloke 0:b3e0f5bb3b87 488 plot( x1, y1, c );
SomeRandomBloke 0:b3e0f5bb3b87 489
SomeRandomBloke 0:b3e0f5bb3b87 490 /* Draw next positions until end */
SomeRandomBloke 0:b3e0f5bb3b87 491 if ( dx > dy ) {
SomeRandomBloke 0:b3e0f5bb3b87 492 /* Take fraction */
SomeRandomBloke 0:b3e0f5bb3b87 493 fraction = dy - ( dx >> 1);
SomeRandomBloke 0:b3e0f5bb3b87 494 while ( x1 != x2 ) {
SomeRandomBloke 0:b3e0f5bb3b87 495 if ( fraction >= 0 ) {
SomeRandomBloke 0:b3e0f5bb3b87 496 y1 += stepy;
SomeRandomBloke 0:b3e0f5bb3b87 497 fraction -= dx;
SomeRandomBloke 0:b3e0f5bb3b87 498 }
SomeRandomBloke 0:b3e0f5bb3b87 499 x1 += stepx;
SomeRandomBloke 0:b3e0f5bb3b87 500 fraction += dy;
SomeRandomBloke 0:b3e0f5bb3b87 501
SomeRandomBloke 0:b3e0f5bb3b87 502 /* Draw calculated point */
SomeRandomBloke 0:b3e0f5bb3b87 503 plot( x1, y1, c );
SomeRandomBloke 0:b3e0f5bb3b87 504 }
SomeRandomBloke 0:b3e0f5bb3b87 505 } else {
SomeRandomBloke 0:b3e0f5bb3b87 506 /* Take fraction */
SomeRandomBloke 0:b3e0f5bb3b87 507 fraction = dx - ( dy >> 1);
SomeRandomBloke 0:b3e0f5bb3b87 508 while ( y1 != y2 ) {
SomeRandomBloke 0:b3e0f5bb3b87 509 if ( fraction >= 0 ) {
SomeRandomBloke 0:b3e0f5bb3b87 510 x1 += stepx;
SomeRandomBloke 0:b3e0f5bb3b87 511 fraction -= dy;
SomeRandomBloke 0:b3e0f5bb3b87 512 }
SomeRandomBloke 0:b3e0f5bb3b87 513 y1 += stepy;
SomeRandomBloke 0:b3e0f5bb3b87 514 fraction += dx;
SomeRandomBloke 0:b3e0f5bb3b87 515
SomeRandomBloke 0:b3e0f5bb3b87 516 /* Draw calculated point */
SomeRandomBloke 0:b3e0f5bb3b87 517 plot( x1, y1, c );
SomeRandomBloke 0:b3e0f5bb3b87 518 }
SomeRandomBloke 0:b3e0f5bb3b87 519 }
SomeRandomBloke 0:b3e0f5bb3b87 520 }
SomeRandomBloke 0:b3e0f5bb3b87 521
SomeRandomBloke 0:b3e0f5bb3b87 522
SomeRandomBloke 0:b3e0f5bb3b87 523 /*
SomeRandomBloke 0:b3e0f5bb3b87 524 * Name : drawRectangle
SomeRandomBloke 0:b3e0f5bb3b87 525 * Description : Draw a rectangle given to top left and bottom right points
SomeRandomBloke 0:b3e0f5bb3b87 526 * Argument(s) : x1, y1 - Absolute pixel coordinates for top left corner
SomeRandomBloke 0:b3e0f5bb3b87 527 * x2, y2 - Absolute pixel coordinates for bottom right corner
SomeRandomBloke 0:b3e0f5bb3b87 528 * c - either PIXEL_ON, PIXEL_OFF
SomeRandomBloke 0:b3e0f5bb3b87 529 * Return value : none
SomeRandomBloke 0:b3e0f5bb3b87 530 */
SomeRandomBloke 0:b3e0f5bb3b87 531 void HT1632_LedMatrix::drawRectangle(unsigned char x1, unsigned char y1,
SomeRandomBloke 0:b3e0f5bb3b87 532 unsigned char x2, unsigned char y2, unsigned char c){
SomeRandomBloke 0:b3e0f5bb3b87 533 drawLine( x1, y1, x2, y1, c );
SomeRandomBloke 0:b3e0f5bb3b87 534 drawLine( x1, y1, x1, y2, c );
SomeRandomBloke 0:b3e0f5bb3b87 535 drawLine( x1, y2, x2, y2, c );
SomeRandomBloke 0:b3e0f5bb3b87 536 drawLine( x2, y1, x2, y2, c );
SomeRandomBloke 0:b3e0f5bb3b87 537 }
SomeRandomBloke 0:b3e0f5bb3b87 538
SomeRandomBloke 0:b3e0f5bb3b87 539
SomeRandomBloke 0:b3e0f5bb3b87 540 /*
SomeRandomBloke 0:b3e0f5bb3b87 541 * Name : drawFilledRectangle
SomeRandomBloke 0:b3e0f5bb3b87 542 * Description : Draw a filled rectangle given to top left and bottom right points
SomeRandomBloke 0:b3e0f5bb3b87 543 * just simply draws horizontal lines where the rectangle would be
SomeRandomBloke 0:b3e0f5bb3b87 544 * Argument(s) : x1, y1 - Absolute pixel coordinates for top left corner
SomeRandomBloke 0:b3e0f5bb3b87 545 * x2, y2 - Absolute pixel coordinates for bottom right corner
SomeRandomBloke 0:b3e0f5bb3b87 546 * c - either PIXEL_ON, PIXEL_OFF
SomeRandomBloke 0:b3e0f5bb3b87 547 * Return value : none
SomeRandomBloke 0:b3e0f5bb3b87 548 */
SomeRandomBloke 0:b3e0f5bb3b87 549 void HT1632_LedMatrix::drawFilledRectangle(unsigned char x1, unsigned char y1,
SomeRandomBloke 0:b3e0f5bb3b87 550 unsigned char x2, unsigned char y2, unsigned char c) {
SomeRandomBloke 0:b3e0f5bb3b87 551 for(int i=y1; i <= y2; i++ ) {
SomeRandomBloke 0:b3e0f5bb3b87 552 drawLine( x1, i, x2, i, c );
SomeRandomBloke 0:b3e0f5bb3b87 553 }
SomeRandomBloke 0:b3e0f5bb3b87 554 }
SomeRandomBloke 0:b3e0f5bb3b87 555
SomeRandomBloke 0:b3e0f5bb3b87 556
SomeRandomBloke 0:b3e0f5bb3b87 557 /*
SomeRandomBloke 0:b3e0f5bb3b87 558 * Name : drawCircle
SomeRandomBloke 0:b3e0f5bb3b87 559 * Description : Draw a circle using Bresenham's algorithm.
SomeRandomBloke 0:b3e0f5bb3b87 560 * Some small circles will look like squares!!
SomeRandomBloke 0:b3e0f5bb3b87 561 * Argument(s) : xc, yc - Centre of circle
SomeRandomBloke 0:b3e0f5bb3b87 562 * r - Radius
SomeRandomBloke 0:b3e0f5bb3b87 563 * c - either PIXEL_ON, PIXEL_OFF
SomeRandomBloke 0:b3e0f5bb3b87 564 * Return value : None
SomeRandomBloke 0:b3e0f5bb3b87 565 */
SomeRandomBloke 0:b3e0f5bb3b87 566 void HT1632_LedMatrix::drawCircle(unsigned char xc, unsigned char yc,
SomeRandomBloke 0:b3e0f5bb3b87 567 unsigned char r, unsigned char c) {
SomeRandomBloke 0:b3e0f5bb3b87 568 int x=0;
SomeRandomBloke 0:b3e0f5bb3b87 569 int y=r;
SomeRandomBloke 0:b3e0f5bb3b87 570 int p=3-(2*r);
SomeRandomBloke 0:b3e0f5bb3b87 571
SomeRandomBloke 0:b3e0f5bb3b87 572 plot( xc+x,yc-y, c);
SomeRandomBloke 0:b3e0f5bb3b87 573
SomeRandomBloke 0:b3e0f5bb3b87 574 for(x=0;x<=y;x++) {
SomeRandomBloke 0:b3e0f5bb3b87 575 if (p<0) {
SomeRandomBloke 0:b3e0f5bb3b87 576 y=y;
SomeRandomBloke 0:b3e0f5bb3b87 577 p=(p+(4*x)+6);
SomeRandomBloke 0:b3e0f5bb3b87 578 } else {
SomeRandomBloke 0:b3e0f5bb3b87 579 y=y-1;
SomeRandomBloke 0:b3e0f5bb3b87 580 p=p+((4*(x-y)+10));
SomeRandomBloke 0:b3e0f5bb3b87 581 }
SomeRandomBloke 0:b3e0f5bb3b87 582
SomeRandomBloke 0:b3e0f5bb3b87 583 plot(xc+x,yc-y, c);
SomeRandomBloke 0:b3e0f5bb3b87 584 plot(xc-x,yc-y, c);
SomeRandomBloke 0:b3e0f5bb3b87 585 plot(xc+x,yc+y, c);
SomeRandomBloke 0:b3e0f5bb3b87 586 plot(xc-x,yc+y, c);
SomeRandomBloke 0:b3e0f5bb3b87 587 plot(xc+y,yc-x, c);
SomeRandomBloke 0:b3e0f5bb3b87 588 plot(xc-y,yc-x, c);
SomeRandomBloke 0:b3e0f5bb3b87 589 plot(xc+y,yc+x, c);
SomeRandomBloke 0:b3e0f5bb3b87 590 plot(xc-y,yc+x, c);
SomeRandomBloke 0:b3e0f5bb3b87 591 }
SomeRandomBloke 0:b3e0f5bb3b87 592 }
SomeRandomBloke 0:b3e0f5bb3b87 593 #endif
SomeRandomBloke 0:b3e0f5bb3b87 594
SomeRandomBloke 0:b3e0f5bb3b87 595 // The end!