InetrfaceProducts NXP / Mbed 2 deprecated PCA9622_LED8x8_Demo

This is a simple demo code for the PCA9622_LED8x8 library. arget hardware : "I2C 8x8 LED matrix board" from Switch Science https://www.switch-science.com/catalog/2071/

Dependencies:   PCA9622_LED8x8 mbed

Demo program for LED matrix.
4 patterns of moving image are available.


Since the hello world program is too simple, this program has been made for demo purpose ;)

Very simple hello world program is available here.

Import programPCA9622_LED8x8_Hello

This is a very simple sample code for the PCA9622_LED8x8 library. arget hardware : "I2C 8x8 LED matrix board" from Switch Science https://www.switch-science.com/catalog/2071/

Last commit 26 Feb 2015 by InetrfaceProducts NXP

Component page is available

Please refer to the component page for for more information.

I2C 8x8 LED matrix board" from Switch Science

main.cpp@0:fa07b945e836, 2014-12-03 (annotated)

Committer:
nxp_ip
Date:
Wed Dec 03 08:12:38 2014 +0000
Revision:
0:fa07b945e836
initial version

Who changed what in which revision?

UserRevisionLine numberNew contents of line
nxp_ip 0:fa07b945e836 1 /**
nxp_ip 0:fa07b945e836 2 * A demo code for the PCA9622 LED 8x8 library
nxp_ip 0:fa07b945e836 3 *
nxp_ip 0:fa07b945e836 4 * @author Tedd OKANO
nxp_ip 0:fa07b945e836 5 * @version 1.0
nxp_ip 0:fa07b945e836 6 * @date 03-Dec-2014
nxp_ip 0:fa07b945e836 7 *
nxp_ip 0:fa07b945e836 8 * This is a sample demo code for the PCA9622_LED8x8 library.
nxp_ip 0:fa07b945e836 9 * Target hardware : "I2C 8x8 LED matrix board" from Switch Science
nxp_ip 0:fa07b945e836 10 * https://www.switch-science.com/catalog/2071/
nxp_ip 0:fa07b945e836 11 *
nxp_ip 0:fa07b945e836 12 * The I2C LED controller PCA9622 is used on this module
nxp_ip 0:fa07b945e836 13 * that ebables to control the LEDs with PWM brightness control.
nxp_ip 0:fa07b945e836 14 *
nxp_ip 0:fa07b945e836 15 * For more information about the PCA9622:
nxp_ip 0:fa07b945e836 16 * http://www.nxp.com/documents/data_sheet/PCA9622.pdf
nxp_ip 0:fa07b945e836 17 */
nxp_ip 0:fa07b945e836 18
nxp_ip 0:fa07b945e836 19 #include "mbed.h"
nxp_ip 0:fa07b945e836 20 #include "PCA9622_LED8x8.h"
nxp_ip 0:fa07b945e836 21
nxp_ip 0:fa07b945e836 22 // Choose a target platform from next list
nxp_ip 0:fa07b945e836 23 PCA9622_LED8x8 matrix( p28, p27 ); // for 40pin type mbed
nxp_ip 0:fa07b945e836 24 //PCA9622_LED8x8 matrix( D14, D15 ); // for Arduino type mbed
nxp_ip 0:fa07b945e836 25 //PCA9622_LED8x8 matrix( dp5, dp27 ); // for mbed LPC1114
nxp_ip 0:fa07b945e836 26
nxp_ip 0:fa07b945e836 27 Ticker _ticker;
nxp_ip 0:fa07b945e836 28 int demo_mode = 0;
nxp_ip 0:fa07b945e836 29
nxp_ip 0:fa07b945e836 30 void demo_mode_change();
nxp_ip 0:fa07b945e836 31 float func0( int x, int y, int t ); // function to make 8x8 image
nxp_ip 0:fa07b945e836 32 float func1( int x, int y, int t ); // function to make 8x8 image
nxp_ip 0:fa07b945e836 33 float func2( int x, int y, int t ); // function to make 8x8 image
nxp_ip 0:fa07b945e836 34 float func3( int x, int y, int t ); // function to make 8x8 image
nxp_ip 0:fa07b945e836 35
nxp_ip 0:fa07b945e836 36 typedef float (*func_ptr)( int x, int y, int t );
nxp_ip 0:fa07b945e836 37
nxp_ip 0:fa07b945e836 38 func_ptr fp[] = {
nxp_ip 0:fa07b945e836 39 func0,
nxp_ip 0:fa07b945e836 40 func1,
nxp_ip 0:fa07b945e836 41 func2,
nxp_ip 0:fa07b945e836 42 func3
nxp_ip 0:fa07b945e836 43 };
nxp_ip 0:fa07b945e836 44
nxp_ip 0:fa07b945e836 45 int main()
nxp_ip 0:fa07b945e836 46 {
nxp_ip 0:fa07b945e836 47 float image[ 8 ][ 8 ]; //
nxp_ip 0:fa07b945e836 48 int count = 0;
nxp_ip 0:fa07b945e836 49
nxp_ip 0:fa07b945e836 50 _ticker.attach( &demo_mode_change, 10 );
nxp_ip 0:fa07b945e836 51 matrix.start();
nxp_ip 0:fa07b945e836 52
nxp_ip 0:fa07b945e836 53 while(1) {
nxp_ip 0:fa07b945e836 54
nxp_ip 0:fa07b945e836 55 // making 8x8 image to "image" array
nxp_ip 0:fa07b945e836 56 for ( int i = 0; i < 8; i++ )
nxp_ip 0:fa07b945e836 57 for ( int j = 0; j < 8; j++ )
nxp_ip 0:fa07b945e836 58 image[ i ][ j ] = (*fp[ demo_mode % (sizeof( fp ) / sizeof( func_ptr )) ])( i, j, count );
nxp_ip 0:fa07b945e836 59
nxp_ip 0:fa07b945e836 60 // set the image into library internal bufer
nxp_ip 0:fa07b945e836 61 matrix.set_data( image );
nxp_ip 0:fa07b945e836 62
nxp_ip 0:fa07b945e836 63 count++;
nxp_ip 0:fa07b945e836 64 wait( 0.05 );
nxp_ip 0:fa07b945e836 65 }
nxp_ip 0:fa07b945e836 66 }
nxp_ip 0:fa07b945e836 67
nxp_ip 0:fa07b945e836 68 void demo_mode_change()
nxp_ip 0:fa07b945e836 69 {
nxp_ip 0:fa07b945e836 70 demo_mode++;
nxp_ip 0:fa07b945e836 71 }
nxp_ip 0:fa07b945e836 72
nxp_ip 0:fa07b945e836 73 float func0( int x, int y, int t )
nxp_ip 0:fa07b945e836 74 {
nxp_ip 0:fa07b945e836 75 // NXP logo
nxp_ip 0:fa07b945e836 76
nxp_ip 0:fa07b945e836 77 static char bm_nxp[] = {
nxp_ip 0:fa07b945e836 78 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
nxp_ip 0:fa07b945e836 79
nxp_ip 0:fa07b945e836 80 0xFF, 0xFF, 0xFF, 0xF0, 0x78, 0x3C, 0x1E, 0x0F,
nxp_ip 0:fa07b945e836 81 0xFF, 0x7E, 0xBD, 0xDB, 0xE7, 0x7E, 0x3C, 0x18,
nxp_ip 0:fa07b945e836 82 0x3C, 0x7E, 0xE7, 0xDB, 0xBD, 0x7E, 0xFF, 0xCC,
nxp_ip 0:fa07b945e836 83 0xCC, 0xCC, 0xCC, 0xCC, 0xFC, 0x78, 0x78,
nxp_ip 0:fa07b945e836 84
nxp_ip 0:fa07b945e836 85 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
nxp_ip 0:fa07b945e836 86 };
nxp_ip 0:fa07b945e836 87
nxp_ip 0:fa07b945e836 88 int index;
nxp_ip 0:fa07b945e836 89 int direction = 0;
nxp_ip 0:fa07b945e836 90
nxp_ip 0:fa07b945e836 91 direction = (t / (sizeof( bm_nxp ) - 8)) & 0x1;
nxp_ip 0:fa07b945e836 92 index = (t % (sizeof( bm_nxp ) - 8));
nxp_ip 0:fa07b945e836 93 index = direction ? (sizeof( bm_nxp ) - 8) - index : index;
nxp_ip 0:fa07b945e836 94 index = index + y;
nxp_ip 0:fa07b945e836 95
nxp_ip 0:fa07b945e836 96 return (bm_nxp[ index ] >> (7 - x)) & 0x1;
nxp_ip 0:fa07b945e836 97 }
nxp_ip 0:fa07b945e836 98
nxp_ip 0:fa07b945e836 99 float func1( int x, int y, int t )
nxp_ip 0:fa07b945e836 100 {
nxp_ip 0:fa07b945e836 101 // ripple
nxp_ip 0:fa07b945e836 102
nxp_ip 0:fa07b945e836 103 const float display_offset = 3.5;
nxp_ip 0:fa07b945e836 104 //const float display_offset = 0.0;
nxp_ip 0:fa07b945e836 105 const float size = 0.3;
nxp_ip 0:fa07b945e836 106 const float eccentricity_cycle = 0.0;
nxp_ip 0:fa07b945e836 107 const float eccentricity_amplitude = 0.0;
nxp_ip 0:fa07b945e836 108
nxp_ip 0:fa07b945e836 109 float xx;
nxp_ip 0:fa07b945e836 110 float yy;
nxp_ip 0:fa07b945e836 111 float tt;
nxp_ip 0:fa07b945e836 112
nxp_ip 0:fa07b945e836 113 float s;
nxp_ip 0:fa07b945e836 114
nxp_ip 0:fa07b945e836 115 xx = ((float)x - display_offset + eccentricity_amplitude * sin( (float)t * eccentricity_cycle )) * size;
nxp_ip 0:fa07b945e836 116 yy = ((float)y - display_offset + eccentricity_amplitude * cos( (float)t * eccentricity_cycle )) * size;
nxp_ip 0:fa07b945e836 117 tt = sin( (float)t * 0.2 ) + sin( (float)t * 0.1 );
nxp_ip 0:fa07b945e836 118
nxp_ip 0:fa07b945e836 119 s = cos( powf( xx * xx + yy * yy, 0.5 ) - tt );
nxp_ip 0:fa07b945e836 120 return ( powf( s, 4.0 ) );
nxp_ip 0:fa07b945e836 121 }
nxp_ip 0:fa07b945e836 122
nxp_ip 0:fa07b945e836 123 float func2( int x, int y, int t )
nxp_ip 0:fa07b945e836 124 {
nxp_ip 0:fa07b945e836 125 // moving dot
nxp_ip 0:fa07b945e836 126
nxp_ip 0:fa07b945e836 127 const float display_offset = 3.5;
nxp_ip 0:fa07b945e836 128 //const float display_offset = 0.0;
nxp_ip 0:fa07b945e836 129 const float size = 0.3;
nxp_ip 0:fa07b945e836 130 const float eccentricity_cycle = 0.25;
nxp_ip 0:fa07b945e836 131 const float eccentricity_amplitude = 2.5;
nxp_ip 0:fa07b945e836 132
nxp_ip 0:fa07b945e836 133 float xx;
nxp_ip 0:fa07b945e836 134 float yy;
nxp_ip 0:fa07b945e836 135 float tt;
nxp_ip 0:fa07b945e836 136 float s;
nxp_ip 0:fa07b945e836 137 float d;
nxp_ip 0:fa07b945e836 138
nxp_ip 0:fa07b945e836 139
nxp_ip 0:fa07b945e836 140 xx = ((float)x - display_offset + eccentricity_amplitude * sin( (float)t * eccentricity_cycle )) * size;
nxp_ip 0:fa07b945e836 141 yy = ((float)y - display_offset + eccentricity_amplitude * cos( (float)t * eccentricity_cycle )) * size;
nxp_ip 0:fa07b945e836 142 tt = (float)t * 0.2;
nxp_ip 0:fa07b945e836 143 d = powf( xx * xx + yy * yy, 0.5 ) - tt * 0.0;
nxp_ip 0:fa07b945e836 144 d = d == 0.0 ? 1e-12 : d;
nxp_ip 0:fa07b945e836 145 d *= 4.0;
nxp_ip 0:fa07b945e836 146
nxp_ip 0:fa07b945e836 147 s = sin( d ) / d;
nxp_ip 0:fa07b945e836 148 return ( powf( s, 4.0 ) );
nxp_ip 0:fa07b945e836 149 }
nxp_ip 0:fa07b945e836 150
nxp_ip 0:fa07b945e836 151 float func3( int x, int y, int t )
nxp_ip 0:fa07b945e836 152 {
nxp_ip 0:fa07b945e836 153 // ripple with offset
nxp_ip 0:fa07b945e836 154
nxp_ip 0:fa07b945e836 155 const float display_offset = 3.5;
nxp_ip 0:fa07b945e836 156 //const float display_offset = 0.0;
nxp_ip 0:fa07b945e836 157 const float size = 0.3;
nxp_ip 0:fa07b945e836 158 const float eccentricity_cycle = 0.25;
nxp_ip 0:fa07b945e836 159 const float eccentricity_amplitude = 2.5;
nxp_ip 0:fa07b945e836 160
nxp_ip 0:fa07b945e836 161 float xx;
nxp_ip 0:fa07b945e836 162 float yy;
nxp_ip 0:fa07b945e836 163 float tt;
nxp_ip 0:fa07b945e836 164
nxp_ip 0:fa07b945e836 165 float s;
nxp_ip 0:fa07b945e836 166
nxp_ip 0:fa07b945e836 167 xx = ((float)x - display_offset + eccentricity_amplitude * sin( (float)t * eccentricity_cycle )) * size;
nxp_ip 0:fa07b945e836 168 yy = ((float)y - display_offset + eccentricity_amplitude * cos( (float)t * eccentricity_cycle )) * size;
nxp_ip 0:fa07b945e836 169 tt = (float)t * 0.2;
nxp_ip 0:fa07b945e836 170
nxp_ip 0:fa07b945e836 171 s = cos( powf( xx * xx + yy * yy, 0.5 ) - tt );
nxp_ip 0:fa07b945e836 172 return ( powf( s, 4.0 ) );
nxp_ip 0:fa07b945e836 173 }
nxp_ip 0:fa07b945e836 174