Kazuhiro Ouchi / AkiLedMatrix

Akizuki 32x16 dot LED Matrix unit (K-03735) control library.

秋月電子の32×16ドットLEDマトリクス表示装置(K-03735)を制御するライブラリです。
バッファの内容をそのままLEDマトリクス装置に送ります。
LEDマトリクス表示装置は最大４台まで接続できるので、接続台数を必ず指定してください。（この台数でバッファのサイズを計算しています。）
行間表示は1msのdelayを入れています。パラメタで変更可能です。
このライブラリの呼び出し元は基本的にwhile()でループしてください。
初めてのライブラリなのでメンバ関数もドキュメントとかまだ最低限です。
おかしなところはぜひコメントをください。

表示例は以下ページをご覧ください。

akiledmatrix.cpp@7:2daedb892e15, 2013-06-09 (annotated)

Committer:
kanpapa
Date:
Sun Jun 09 12:23:33 2013 +0000
Revision:
7:2daedb892e15
Parent:
6:141717976896
Child:
9:988d937735e0
bugfix: font8 to ledbuf routine.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
kanpapa 5:c055674c4a0b 1 #include "mbed.h"
kanpapa 0:bf351a2fa565 2 #include "akiledmatrix.h"
kanpapa 0:bf351a2fa565 3
kanpapa 0:bf351a2fa565 4 AkiLedMatrix::AkiLedMatrix(PinName sin1,
kanpapa 0:bf351a2fa565 5 PinName sin2,
kanpapa 0:bf351a2fa565 6 PinName sin3,
kanpapa 0:bf351a2fa565 7 PinName clock,
kanpapa 0:bf351a2fa565 8 PinName latch,
kanpapa 1:2705be49d5e2 9 PinName strobe,
kanpapa 7:2daedb892e15 10 const int rowsize,
kanpapa 5:c055674c4a0b 11 const int delay,
kanpapa 5:c055674c4a0b 12 const int shift_count_init) :
kanpapa 0:bf351a2fa565 13 _sin1(sin1),
kanpapa 0:bf351a2fa565 14 _sin2(sin2),
kanpapa 0:bf351a2fa565 15 _sin3(sin3),
kanpapa 0:bf351a2fa565 16 _clock(clock),
kanpapa 0:bf351a2fa565 17 _latch(latch),
kanpapa 1:2705be49d5e2 18 _strobe(strobe),
kanpapa 7:2daedb892e15 19 _rowsize(rowsize),
kanpapa 5:c055674c4a0b 20 _delay(delay),
kanpapa 5:c055674c4a0b 21 _shift_count_init(shift_count_init) {
kanpapa 0:bf351a2fa565 22 // initrize
kanpapa 0:bf351a2fa565 23 _sin1 = 0;
kanpapa 0:bf351a2fa565 24 _sin2 = 0;
kanpapa 0:bf351a2fa565 25 _sin3 = 0;
kanpapa 0:bf351a2fa565 26 _clock = 0;
kanpapa 0:bf351a2fa565 27 _latch = 1;
kanpapa 0:bf351a2fa565 28 _strobe = 0; // LED ON
kanpapa 5:c055674c4a0b 29 shift_count = shift_count_init;
kanpapa 5:c055674c4a0b 30 }
kanpapa 5:c055674c4a0b 31
kanpapa 5:c055674c4a0b 32 //
kanpapa 7:2daedb892e15 33 // bit shift array[buf_rowsize]
kanpapa 5:c055674c4a0b 34 //
kanpapa 5:c055674c4a0b 35 void AkiLedMatrix::bitshift(unsigned char *array, int xsize){
kanpapa 5:c055674c4a0b 36 int top_bit = 0, work_bit = 0;
kanpapa 5:c055674c4a0b 37 for (int y = 0; y < (16 * xsize); y = y + xsize){
kanpapa 5:c055674c4a0b 38 for (int x = 0; x < xsize; x++){
kanpapa 5:c055674c4a0b 39 if ((array[x + y] & 0x80) != 0){
kanpapa 5:c055674c4a0b 40 if (x == 0){
kanpapa 5:c055674c4a0b 41 top_bit = 1;
kanpapa 5:c055674c4a0b 42 } else {
kanpapa 5:c055674c4a0b 43 work_bit = 1;
kanpapa 5:c055674c4a0b 44 }
kanpapa 5:c055674c4a0b 45 } else {
kanpapa 5:c055674c4a0b 46 if (x == 0){
kanpapa 5:c055674c4a0b 47 top_bit = 0;
kanpapa 5:c055674c4a0b 48 } else {
kanpapa 5:c055674c4a0b 49 work_bit = 0;
kanpapa 5:c055674c4a0b 50 }
kanpapa 5:c055674c4a0b 51 }
kanpapa 5:c055674c4a0b 52 // Right shift
kanpapa 5:c055674c4a0b 53 array[x + y] = array[x + y] << 1;
kanpapa 5:c055674c4a0b 54
kanpapa 5:c055674c4a0b 55 if (x != 0){
kanpapa 5:c055674c4a0b 56 array[x + y - 1 ] = array[x + y - 1 ] | work_bit;
kanpapa 5:c055674c4a0b 57 }
kanpapa 5:c055674c4a0b 58 }
kanpapa 5:c055674c4a0b 59 // set lower bit (last byte)
kanpapa 5:c055674c4a0b 60 array[y + xsize - 1] = array[y + xsize - 1] | top_bit;
kanpapa 5:c055674c4a0b 61 }
kanpapa 0:bf351a2fa565 62 }
kanpapa 5:c055674c4a0b 63
kanpapa 5:c055674c4a0b 64 void AkiLedMatrix::display(unsigned char *buffer) {
kanpapa 7:2daedb892e15 65 for (int y = 0; y < 16; y++){
kanpapa 7:2daedb892e15 66 int bufp = y * 80 * 2; // buffer pointer
kanpapa 7:2daedb892e15 67 for (int ledno = 3; ledno >= 0; ledno--){
kanpapa 7:2daedb892e15 68 uint16_t led1_data = buffer[bufp + ledno * 4] << 8 | buffer[bufp + ledno * 4 + 1];
kanpapa 7:2daedb892e15 69 uint16_t led2_data = buffer[bufp + ledno * 4 + 2] << 8 | buffer[bufp + ledno * 4 + 3];
kanpapa 5:c055674c4a0b 70
kanpapa 2:ddef08e13c8e 71 for (int x = 0; x < 16; x++){
kanpapa 2:ddef08e13c8e 72 if (x == y){
kanpapa 2:ddef08e13c8e 73 _sin1 = 1;
kanpapa 2:ddef08e13c8e 74 } else {
kanpapa 2:ddef08e13c8e 75 _sin1 = 0;
kanpapa 2:ddef08e13c8e 76 }
kanpapa 0:bf351a2fa565 77
kanpapa 2:ddef08e13c8e 78 // LED1
kanpapa 2:ddef08e13c8e 79 _sin2 = led1_data & 0x01;
kanpapa 2:ddef08e13c8e 80 led1_data = led1_data >> 1;
kanpapa 0:bf351a2fa565 81
kanpapa 2:ddef08e13c8e 82 // LED2
kanpapa 2:ddef08e13c8e 83 _sin3 = led2_data & 0x01;
kanpapa 2:ddef08e13c8e 84 led2_data = led2_data >> 1;
kanpapa 5:c055674c4a0b 85
kanpapa 2:ddef08e13c8e 86 wait_us(2); // tSETUP min:1.2us
kanpapa 0:bf351a2fa565 87
kanpapa 2:ddef08e13c8e 88 // set clock
kanpapa 2:ddef08e13c8e 89 _clock = 1;
kanpapa 2:ddef08e13c8e 90 wait_us(1); // twCLK min:1.0us
kanpapa 2:ddef08e13c8e 91 _clock = 0;
kanpapa 2:ddef08e13c8e 92 }
kanpapa 1:2705be49d5e2 93 }
kanpapa 5:c055674c4a0b 94
kanpapa 1:2705be49d5e2 95 // set latch
kanpapa 1:2705be49d5e2 96 _latch = 0;
kanpapa 1:2705be49d5e2 97 wait_us(2); // twLAT min:2.0us
kanpapa 1:2705be49d5e2 98 _latch = 1;
kanpapa 0:bf351a2fa565 99
kanpapa 5:c055674c4a0b 100 wait_us(_delay);
kanpapa 5:c055674c4a0b 101
kanpapa 5:c055674c4a0b 102 // shift check
kanpapa 5:c055674c4a0b 103 if (shift_count-- == 0){
kanpapa 7:2daedb892e15 104 bitshift(buffer, _rowsize);
kanpapa 5:c055674c4a0b 105 shift_count = _shift_count_init;
kanpapa 0:bf351a2fa565 106 }
kanpapa 0:bf351a2fa565 107 }
kanpapa 0:bf351a2fa565 108 }
kanpapa 5:c055674c4a0b 109
kanpapa 7:2daedb892e15 110 int AkiLedMatrix::getrowsize(){
kanpapa 7:2daedb892e15 111 return _rowsize;
kanpapa 5:c055674c4a0b 112 }