Tony Mudd
Matrix driver for HDSP-200x four character 5x7 alphanumeric displays. These are 12 pin DIL package ICs full of LEDs arranged in 4 characters of 5 columns & 7 rows each. The ones I have are the yellow HDSP-2001, but they are also available in red (HDSP-2000), high efficiency red (HDSP-2002) or green (HDSP 2003). I don't know if they are easily available anymore, but I thought, since I've got 30 or so, I'd have a go at programming them. See my notepad (http://mbed.org/users/tonymudd/notebook/led-matrix-display/) for videos of this working.
Dependents: alpha_message TP1_matriz
Revision 0:69eeea586a16, committed 2011-06-15
- Comitter:
- tonymudd
- Date:
- Wed Jun 15 22:27:52 2011 +0000
- Commit message:
Changed in this revision
diff -r 000000000000 -r 69eeea586a16 matrix.h
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/matrix.h Wed Jun 15 22:27:52 2011 +0000
@@ -0,0 +1,862 @@
+/***** ASCII character data *****
+
+We define bit patterns for these characters
+(ascii 0x20 to 0x7E = 95 characters).
+
+ASCII CHAR ASCII CHAR ASCII CHAR ASCII CHAR ASCII CHAR ASCII CHAR
+0x20 0x30 0 0x40 @ 0x50 P 0x60 ` 0x70 p
+0x21 ! 0x31 1 0x41 A 0x51 Q 0x61 a 0x71 q
+0x22 " 0x32 2 0x42 B 0x52 R 0x62 b 0x72 r
+0x23 # 0x33 3 0x43 C 0x53 S 0x63 c 0x73 s
+0x24 $ 0x34 4 0x44 D 0x54 T 0x64 d 0x74 t
+0x25 % 0x35 5 0x45 E 0x55 U 0x65 e 0x75 u
+0x26 & 0x36 6 0x46 F 0x56 V 0x66 f 0x76 v
+0x27 ' 0x37 7 0x47 G 0x57 W 0x67 g 0x77 w
+0x28 ( 0x38 8 0x48 H 0x58 X 0x68 h 0x78 x
+0x29 ) 0x39 9 0x49 I 0x59 Y 0x69 i 0x79 y
+0x2A * 0x3A : 0x4A J 0x5A Z 0x6A j 0x7A z
+0x2B + 0x3B ; 0x4B K 0x5B [ 0x6B k 0x7B {
+0x2C , 0x3C < 0x4C L 0x5C \ 0x6C l 0x7C |
+0x2D - 0x3D = 0x4D M 0x5D ] 0x6D m 0x7D }
+0x2E . 0x3E > 0x4E N 0x5E ^ 0x6E n 0x7E ~
+0x2F / 0x3F ? 0x4F O 0x5F _ 0x6F o
+
+
+An "A" is defined like this (for a 5x7 array)
+
+ x = 00100 = 0x04
+ x x = 01010 = 0x0A
+x x = 10001 = 0x11
+x x = 10001 = 0x11
+x x x x x = 11111 = 0x1F
+x x = 10001 = 0x11
+x x = 10001 = 0x11
+
+so we could define A like this
+
+unsigned char A_DATA[7] = { 0x04, 0x0A, 0x11, 0x11, 0x1F, 0x11, 0x11 } ;
+
+or we could draw a picture and let the preprocessor do the work for us
+
+#define __x__ 0x04 // __x__ = 00100, so there will only be 32 patterns
+#define _x_x_ 0x0A // to define
+#define x___x 0x11
+#define xxxxx 0x1F
+
+unsigned char A_DATA[7] = { __x__,
+ _x_x_,
+ x___x,
+ x___x,
+ xxxxx,
+ x___x,
+ x___x }
+
+now this is much easier to fiddle with if we want to
+define a slightly different look (no need to sketch it
+out, find the binary, then the hex.
+
+*/
+
+
+#define _____ 0x00
+#define ____x 0x01
+#define ___x_ 0x02
+#define ___xx 0x03
+#define __x__ 0x04
+#define __x_x 0x05
+#define __xx_ 0x06
+#define __xxx 0x07
+#define _x___ 0x08
+#define _x__x 0x09
+#define _x_x_ 0x0A
+#define _x_xx 0x0B
+#define _xx__ 0x0C
+#define _xx_x 0x0D
+#define _xxx_ 0x0E
+#define _xxxx 0x0F
+#define x____ 0x10
+#define x___x 0x11
+#define x__x_ 0x12
+#define x__xx 0x13
+#define x_x__ 0x14
+#define x_x_x 0x15
+#define x_xx_ 0x16
+#define x_xxx 0x17
+#define xx___ 0x18
+#define xx__x 0x19
+#define xx_x_ 0x1A
+#define xx_xx 0x1B
+#define xxx__ 0x1C
+#define xxx_x 0x1D
+#define xxxx_ 0x1E
+#define xxxxx 0x1F
+
+unsigned char char_data[95][7] =
+{
+
+ { _____,
+ _____,
+ _____,
+ _____,
+ _____,
+ _____,
+ _____ }, // space
+
+ { __x__,
+ __x__,
+ __x__,
+ __x__,
+ __x__,
+ _____,
+ __x__ }, // !
+
+ { _x_x_,
+ _x_x_,
+ _____,
+ _____,
+ _____,
+ _____,
+ _____ }, // "
+
+ { _____,
+ _x_x_,
+ xxxxx,
+ _x_x_,
+ xxxxx,
+ _x_x_,
+ _____ }, // #
+
+ { __x__,
+ _xxxx,
+ x_x__,
+ _xxx_,
+ __x_x,
+ xxxx_,
+ __x__ }, // $
+
+ { xx___,
+ xx__x,
+ ___x_,
+ __x__,
+ _x___,
+ x__xx,
+ ___xx }, // %
+
+ { _xxx_,
+ _x_x_,
+ _xx__,
+ _x___,
+ x_x_x,
+ x__xx,
+ _xxx_ }, // &
+
+ { __x__,
+ __x__,
+ _____,
+ _____,
+ _____,
+ _____,
+ _____ }, // '
+
+ { ____x,
+ ___x_,
+ __x__,
+ __x__,
+ __x__,
+ ___x_,
+ ____x }, // (
+
+ { x____,
+ _x___,
+ __x__,
+ __x__,
+ __x__,
+ _x___,
+ x____ }, // )
+
+ { _____,
+ __x__,
+ x_x_x,
+ xxxxx,
+ x_x_x,
+ __x__,
+ _____ }, // *
+
+ { _____,
+ __x__,
+ __x__,
+ xxxxx,
+ __x__,
+ __x__,
+ _____ }, // +
+
+ { _____,
+ _____,
+ _____,
+ _____,
+ _____,
+ ___x_,
+ __x__ }, // ,
+
+ { _____,
+ _____,
+ _____,
+ _xxx_,
+ _____,
+ _____,
+ _____ }, // -
+
+ { _____,
+ _____,
+ _____,
+ _____,
+ _____,
+ __xx_,
+ __xx_ }, // .
+
+ { _____,
+ ____x,
+ ___x_,
+ __x__,
+ _x___,
+ x____,
+ _____ }, // /
+
+ { _xxx_,
+ x___x,
+ x__xx,
+ x_x_x,
+ xx__x,
+ x___x,
+ _xxx_ }, // 0
+
+ { __x__,
+ _xx__,
+ __x__,
+ __x__,
+ __x__,
+ __x__,
+ xxxxx }, // 1
+
+ { _xxx_,
+ x___x,
+ ____x,
+ __xx_,
+ _x___,
+ x____,
+ xxxxx }, // 2
+
+ { _xxx_,
+ x___x,
+ ____x,
+ __xx_,
+ ____x,
+ x___x,
+ _xxx_ }, // 3
+
+ { x____,
+ x___x,
+ x___x,
+ xxxxx,
+ ____x,
+ ____x,
+ ____x }, // 4
+
+ { xxxxx,
+ x____,
+ x____,
+ xxxx_,
+ ____x,
+ x___x,
+ _xxx_ }, // 5
+
+ { _xxx_,
+ x___x,
+ x____,
+ xxxx_,
+ x___x,
+ x___x,
+ _xxx_ }, // 6
+
+ { xxxxx,
+ ____x,
+ ____x,
+ ___x_,
+ __x__,
+ __x__,
+ __x__ }, //7
+
+ { _xxx_,
+ x___x,
+ x___x,
+ _xxx_,
+ x___x,
+ x___x,
+ _xxx_ }, //8
+
+ { _xxx_,
+ x___x,
+ x___x,
+ _xxxx,
+ ____x,
+ ____x,
+ ____x }, //9
+
+ { _____,
+ __x__,
+ __x__,
+ _____,
+ __x__,
+ __x__,
+ _____ }, // :
+
+ { _____,
+ _____,
+ __x__,
+ __x__,
+ _____,
+ __x__,
+ _x___ }, // ;
+
+ { ____x,
+ ___x_,
+ __x__,
+ _x___,
+ __x__,
+ ___x_,
+ ____x }, // <
+
+ { _____,
+ _____,
+ xxxxx,
+ _____,
+ xxxxx,
+ _____,
+ _____ }, // =
+
+ { x____,
+ _x___,
+ __x__,
+ ___x_,
+ __x__,
+ _x___,
+ x____ }, // >
+
+ { _xxx_,
+ x___x,
+ ___x_,
+ __x__,
+ __x__,
+ _____,
+ __x__ }, // ?
+
+ { _xxx_,
+ x___x,
+ x_x_x,
+ x_x_x,
+ x_xxx,
+ x____,
+ _xxxx }, // @
+
+ { __x__,
+ _x_x_,
+ x___x,
+ x___x,
+ xxxxx,
+ x___x,
+ x___x }, // A
+
+ { xxxx_,
+ x___x,
+ x___x,
+ xxxx_,
+ x___x,
+ x___x,
+ xxxxx }, // B
+
+ { _xxx_,
+ x___x,
+ x____,
+ x____,
+ x____,
+ x___x,
+ _xxx_ }, // C
+
+ { xxxx_,
+ x___x,
+ x___x,
+ x___x,
+ x___x,
+ x___x,
+ xxxxx }, // D
+
+ { xxxxx,
+ x____,
+ x____,
+ xxx__,
+ x____,
+ x____,
+ xxxxx }, // E
+
+ { xxxxx,
+ x____,
+ x____,
+ xxx__,
+ x____,
+ x____,
+ x____ }, // F
+
+ { _xxx_,
+ x___x,
+ x____,
+ x_xxx,
+ x___x,
+ x___x,
+ _xxx_ }, // G
+
+ { x___x,
+ x___x,
+ x___x,
+ xxxxx,
+ x___x,
+ x___x,
+ x___x }, // H
+
+ { xxxxx,
+ __x__,
+ __x__,
+ __x__,
+ __x__,
+ __x__,
+ xxxxx }, // I
+
+ { xxxxx,
+ ___x_,
+ ___x_,
+ ___x_,
+ ___x_,
+ x__x_,
+ _xx__ }, // J
+
+ { x___x,
+ x__x_,
+ x_x__,
+ xx___,
+ x_x__,
+ x__x_,
+ x___x }, // K
+
+ { x____,
+ x____,
+ x____,
+ x____,
+ x____,
+ x____,
+ xxxxx }, // L
+
+ { x___x,
+ xx_xx,
+ x_x_x,
+ x___x,
+ x___x,
+ x___x,
+ x___x }, // M
+
+ { x___x,
+ x___x,
+ xx__x,
+ x_x_x,
+ x__xx,
+ x___x,
+ x___x }, // N
+
+ { _xxx_,
+ x___x,
+ x___x,
+ x___x,
+ x___x,
+ x___x,
+ _xxx_ }, // O
+
+ { xxxx_,
+ x___x,
+ x___x,
+ xxxx_,
+ x____,
+ x____,
+ x____ }, // P
+
+ { _xxx_,
+ x___x,
+ x___x,
+ x___x,
+ x_x_x,
+ x__x_,
+ _xx_x }, // Q
+
+ { xxxx_,
+ x___x,
+ x___x,
+ xxxx_,
+ x_x__,
+ x__x_,
+ x___x }, // R
+
+ { _xxx_,
+ x___x,
+ x____,
+ _xxx_,
+ ____x,
+ x___x,
+ _xxx_ }, // S
+
+ { xxxxx,
+ __x__,
+ __x__,
+ __x__,
+ __x__,
+ __x__,
+ __x__ }, // T
+
+ { x___x,
+ x___x,
+ x___x,
+ x___x,
+ x___x,
+ x___x,
+ _xxx_ }, // U
+
+ { x___x,
+ x___x,
+ x___x,
+ x___x,
+ x___x,
+ _x_x_,
+ __x__ }, // V
+
+ { x___x,
+ x___x,
+ x___x,
+ x___x,
+ x_x_x,
+ xx_xx,
+ x___x }, // W
+
+ { x___x,
+ x___x,
+ _x_x_,
+ __x__,
+ _x_x_,
+ x___x,
+ x___x }, // X
+
+
+ { x___x,
+ x___x,
+ _x_x_,
+ __x__,
+ __x__,
+ __x__,
+ __x__ }, // Y
+
+ { xxxxx,
+ x___x,
+ ___x_,
+ __x__,
+ _x___,
+ x___x,
+ xxxxx }, // Z
+
+ { _xxx_,
+ _x___,
+ _x___,
+ _x___,
+ _x___,
+ _x___,
+ _xxx_ }, // [
+
+ { _____,
+ x____,
+ _x___,
+ __x__,
+ ___x_,
+ ____x,
+ _____ }, // \
+
+ { _xxx_,
+ ___x_,
+ ___x_,
+ ___x_,
+ ___x_,
+ ___x_,
+ _xxx_ }, // ]
+
+ { __x__,
+ _x_x_,
+ x___x,
+ _____,
+ _____,
+ _____,
+ _____ }, // ^
+
+ { _____,
+ _____,
+ _____,
+ _____,
+ _____,
+ _____,
+ xxxxx }, // _
+
+// d e f g h i j k l m n o p q r s t u v w x y z
+
+ { _x___,
+ __x__,
+ _____,
+ _____,
+ _____,
+ _____,
+ _____ }, // `
+
+ { _____,
+ _____,
+ _____,
+ _xx__,
+ x__x_,
+ x__x_,
+ _xx_x, }, // a
+
+ { _____,
+ x____,
+ x____,
+ xxxx_,
+ x___x,
+ x___x,
+ xxxx_ }, // b
+
+ { _____,
+ _____,
+ _____,
+ _xxxx,
+ x____,
+ x____,
+ _xxxx, }, // c
+
+ { _____,
+ ____x,
+ ____x,
+ _xxxx,
+ x___x,
+ x___x,
+ _xxxx }, // d
+
+ { _____,
+ _____,
+ _xxx_,
+ x___x,
+ xxxx_,
+ x____,
+ _xxxx, }, // e
+
+ { __xx_,
+ _x__x,
+ _x___,
+ xxxx_,
+ _x___,
+ _x___,
+ _x___, }, // f
+
+ { _____,
+ _xxx_,
+ x___x,
+ x___x,
+ _xxxx,
+ ____x,
+ _xxx_, }, // c
+
+ { _____,
+ x____,
+ x____,
+ xxxx_,
+ x___x,
+ x___x,
+ x___x, }, // h
+
+ { _____,
+ _____,
+ __x__,
+ _____,
+ __x__,
+ __x__,
+ __x__, }, // i
+
+ { _____,
+ ___x_,
+ ___x_,
+ ___x_,
+ ___x_,
+ x__x_,
+ _xx__, }, // j
+
+ { _____,
+ _____,
+ x__x_,
+ x_x__,
+ xxx__,
+ x__x_,
+ x___x, }, // k
+
+ { _____,
+ _x___,
+ _x___,
+ _x___,
+ _x___,
+ _x___,
+ _x___ }, // l
+
+ { _____,
+ _____,
+ _____,
+ x___x,
+ xx_xx,
+ x_x_x,
+ x___x }, // m
+
+ { _____,
+ _____,
+ _____,
+ x_xx_,
+ xx__x,
+ x___x,
+ x___x }, // n
+
+ { _____,
+ _____,
+ _____,
+ _xxx_,
+ x___x,
+ x___x,
+ _xxx_ }, // o
+
+
+ { _____,
+ _xxx_,
+ _x__x,
+ _x__x,
+ _xxx_,
+ _x___,
+ _x___, }, // p
+
+ { _____,
+ _xxx_,
+ x___x,
+ _xxx_,
+ ___x_,
+ ___x_,
+ ____x, }, // q
+
+ { _____,
+ _____,
+ _x___,
+ _xxx_,
+ _x___,
+ _x___,
+ _x___ }, // r
+
+ { _____,
+ _____,
+ __xxx,
+ _x___,
+ __xx_,
+ ____x,
+ _xxx_ }, // s
+
+ { _____,
+ _____,
+ __x__,
+ _xxx_,
+ __x__,
+ __x__,
+ __x__ }, // t
+
+ { _____,
+ _____,
+ _____,
+ x___x,
+ x___x,
+ x___x,
+ _xxx_ }, // u
+
+ { _____,
+ _____,
+ _____,
+ x___x,
+ x___x,
+ _x_x_,
+ __x__ }, // v
+
+ { _____,
+ _____,
+ _____,
+ x___x,
+ x_x_x,
+ xx_xx,
+ x___x }, // w
+
+ { _____,
+ _____,
+ x___x,
+ _x_x_,
+ __x__,
+ _x_x_,
+ x___x, }, // x
+
+ { _____,
+ _____,
+ x___x,
+ _x_x_,
+ __x__,
+ __x__,
+ __x__ }, // y
+
+ { _____,
+ _____,
+ xxxxx,
+ ___x_,
+ __x__,
+ _x___,
+ xxxxx }, // z
+
+ { __xx_,
+ _x___,
+ _x___,
+ x____,
+ _x___,
+ _x___,
+ __xx_, }, // {
+
+ { __x__,
+ __x__,
+ __x__,
+ __x__,
+ __x__,
+ __x__,
+ __x__, }, // |
+
+ { _xx__,
+ ___x_,
+ ___x_,
+ ____x,
+ ___x_,
+ ___x_,
+ _xx__, }, // }
+
+ { _____,
+ _x_x_,
+ x_x_x,
+ _____,
+ _____,
+ _____,
+ _____, }, // ~
+
+};
+
diff -r 000000000000 -r 69eeea586a16 matrixDisplay.cpp
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/matrixDisplay.cpp Wed Jun 15 22:27:52 2011 +0000
@@ -0,0 +1,102 @@
+#include "mbed.h"
+#include "matrixDisplay.h"
+#include "matrix.h"
+#include <string>
+
+matrixDisplay::matrixDisplay( float scrollRate, PinName clockPinIn,
+ PinName dataPinIn, PinName col1,
+ PinName col2, PinName col3,
+ PinName col4, PinName col5)
+{
+ clockPin = new DigitalOut(clockPinIn);
+ dataPin = new DigitalOut(dataPinIn);
+ columnsBus = new BusOut(col1, col2, col3, col4, col5);
+ column = 0;
+ whereInMessage = 0;
+ message = NULL;
+ // clear the text array.
+ for (int i =0 ; i < numOfChars; i++)
+ text[i] = ' ';
+ loadDisplay();
+ colTick.attach_us(this, &matrixDisplay::colChange, 5000);
+ scroll.attach(this, &matrixDisplay::scrollMessage, scrollRate);
+}
+
+matrixDisplay::~matrixDisplay()
+{
+ stop();
+}
+
+// Stop displaying stuff.
+void matrixDisplay::stop()
+{
+ colTick.detach();
+ scroll.detach();
+ columnsBus->write( 0);
+}
+
+// load a new message
+// keeps a pointer to it, so bad things could happen.
+void matrixDisplay::setMessage(char * newMessage)
+{
+ for (int i =0 ; i < numOfChars; i++)
+ text[i] = ' ';
+ message = newMessage;
+ whereInMessage = 0;
+}
+
+void matrixDisplay::outputCol(int colNum) // colNum is 0-4
+{
+ for (int i = 0; i< numOfLeds; i++) // once for each bool in the "display" which has already been set up
+ {
+ clockPin->write(1);
+ if (display[colNum][i])
+ dataPin->write(1);
+ else
+ dataPin->write(0);
+ clockPin->write(0);
+ }
+}
+
+void matrixDisplay::colChange()
+{
+ columnsBus->write( 0);
+ column ++;
+ if (column > 4)
+ column = 0;
+ outputCol(column);
+ columnsBus->write (1 << column); // columns is a bit pattern
+}
+
+// turns the contents of "text" into the bit pattern in "display"
+void matrixDisplay::loadDisplay()
+{
+ for (int i =0;i < numOfChars; i ++) // for each char in text
+ {
+ char c = text[i];
+ c -= 32; // index an array starting at 0 for char ' ' (space)
+ for (int led = 0; led < numOfRows; led++) // for each led in the column, done this way round because that's the way it's stored in matrix.h
+ {
+ int bits = char_data[c][led];
+ for (int col = 0; col < numOfColumns; col++) // for each column
+ {
+ display[col][led+i*numOfRows] = (bits & 1<< col);
+ }
+ }
+ }
+}
+
+void matrixDisplay::scrollMessage()
+{
+ if (message == NULL) // It may not have been set yet.
+ return;
+ if (whereInMessage >= strlen(message))
+ whereInMessage =0;
+ for (int i=1;i<numOfChars;i++)
+ {
+ text[i-1] = text[i];
+ }
+ text[numOfChars-1] = message[whereInMessage];
+ loadDisplay();
+ whereInMessage ++;
+}
diff -r 000000000000 -r 69eeea586a16 matrixDisplay.h
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/matrixDisplay.h Wed Jun 15 22:27:52 2011 +0000
@@ -0,0 +1,48 @@
+/*
+ class to write to a matrix led display.
+
+ Written by tonymudd (mbed@tonymudd.co.uk)
+
+*/
+#include "mbed.h"
+
+#ifndef MBED_MATRIXDISPLAY_H
+#define MBED_MATRIXDISPLAY_H
+
+class matrixDisplay
+{
+ public:
+ matrixDisplay( float scrollRate, PinName clockPinIn, PinName dataPinIn,
+ PinName col1, PinName col2, PinName col3,
+ PinName col4, PinName col5);
+ virtual ~matrixDisplay();
+ void setMessage(char * newMessage);
+ void stop();
+
+ private:
+ void colChange();
+ void outputCol(int);
+ void loadDisplay();
+ void scrollMessage();
+ static const int numOfColumns = 5;
+ static const int numOfRows = 7;
+ static const int numOfChars = 4;
+ static const int numOfLeds = numOfRows * numOfChars;
+ int column;
+ // fires when the column changes - fast
+ Ticker colTick;
+ // fires to scroll the chars along one - slow.
+ Ticker scroll;
+ bool display[numOfColumns][numOfLeds]; // on the display now
+ char text[numOfChars]; // text on the display
+ char *message; // the whole message
+ int whereInMessage; // which character in message to display next
+
+ // And the hardware it uses:
+ DigitalOut * clockPin;
+ DigitalOut * dataPin; // DigitalOut data(p20);
+ BusOut * columnsBus; // BusOut columns(p10,p11,p12,p13,p14);
+
+};
+
+#endif
\ No newline at end of file