Tedd OKANO
A sample code for training. Using LPCXpresso baseboard. This program let 16 LEDs blink via I2C (PCA9532). Addition to that, the LED dim control is done by light sensor (ISL29003) output.
main.cpp@0:6502de955845, 2010-02-16 (annotated)
- Committer:
- okano
- Date:
- Tue Feb 16 05:05:28 2010 +0000
- Revision:
- 0:6502de955845
Who changed what in which revision?
| User | Revision | Line number | New contents of line |
|---|---|---|---|
| okano | 0:6502de955845 | 1 | /* |
| okano | 0:6502de955845 | 2 | * mbed + LPCXpresso_baseboard demo code |
| okano | 0:6502de955845 | 3 | * |
| okano | 0:6502de955845 | 4 | * This code has been made for a training session. |
| okano | 0:6502de955845 | 5 | * |
| okano | 0:6502de955845 | 6 | * With this code, the mbed drives PCA9532 to control 16 LEDs. |
| okano | 0:6502de955845 | 7 | * The LED blinked in pattern. |
| okano | 0:6502de955845 | 8 | * |
| okano | 0:6502de955845 | 9 | * On this demo, the ISL29003 is also driven to get ambient |
| okano | 0:6502de955845 | 10 | * light level. The ambient light get dark, the LED blightness |
| okano | 0:6502de955845 | 11 | * get low. The LEDs are controlled by PWM function of PCA9532. |
| okano | 0:6502de955845 | 12 | * |
| okano | 0:6502de955845 | 13 | * Copyright (c) 2010 NXP Semiconductors Japan |
| okano | 0:6502de955845 | 14 | * Released under the MIT License: http://mbed.org/license/mit |
| okano | 0:6502de955845 | 15 | * |
| okano | 0:6502de955845 | 16 | * revision 1.0 16-Feb-2010 1st release |
| okano | 0:6502de955845 | 17 | */ |
| okano | 0:6502de955845 | 18 | |
| okano | 0:6502de955845 | 19 | #include "mbed.h" |
| okano | 0:6502de955845 | 20 | |
| okano | 0:6502de955845 | 21 | I2C i2c( p28, p27 ); |
| okano | 0:6502de955845 | 22 | Serial pc( USBTX, USBRX ); |
| okano | 0:6502de955845 | 23 | |
| okano | 0:6502de955845 | 24 | const int PCA9532_addr = 0xC0; |
| okano | 0:6502de955845 | 25 | const int ISL29003_addr = 0x88; |
| okano | 0:6502de955845 | 26 | |
| okano | 0:6502de955845 | 27 | class baseboard_led_array { |
| okano | 0:6502de955845 | 28 | public: |
| okano | 0:6502de955845 | 29 | |
| okano | 0:6502de955845 | 30 | baseboard_led_array() { |
| okano | 0:6502de955845 | 31 | } |
| okano | 0:6502de955845 | 32 | |
| okano | 0:6502de955845 | 33 | ~baseboard_led_array() { |
| okano | 0:6502de955845 | 34 | } |
| okano | 0:6502de955845 | 35 | |
| okano | 0:6502de955845 | 36 | void operator=( int c ) { |
| okano | 0:6502de955845 | 37 | |
| okano | 0:6502de955845 | 38 | char a[ 5 ] = { 0x16, 0x00, 0x00, 0x00, 0x00 }; |
| okano | 0:6502de955845 | 39 | const char v = 0x2; |
| okano | 0:6502de955845 | 40 | |
| okano | 0:6502de955845 | 41 | for ( int i = 0; i < 16; i++ ) |
| okano | 0:6502de955845 | 42 | a[ (i / 4) + 1 ] |= (((c >> i) & 0x1) ? v : 0x0) << ((i % 4) << 1); |
| okano | 0:6502de955845 | 43 | |
| okano | 0:6502de955845 | 44 | i2c.write( PCA9532_addr, a, 5 ); |
| okano | 0:6502de955845 | 45 | } |
| okano | 0:6502de955845 | 46 | |
| okano | 0:6502de955845 | 47 | void pwm0( char c ) { |
| okano | 0:6502de955845 | 48 | char cmd[ 2 ]; |
| okano | 0:6502de955845 | 49 | |
| okano | 0:6502de955845 | 50 | cmd[ 0 ] = 0x03; |
| okano | 0:6502de955845 | 51 | cmd[ 1 ] = c; |
| okano | 0:6502de955845 | 52 | i2c.write( PCA9532_addr, cmd, 2 ); |
| okano | 0:6502de955845 | 53 | } |
| okano | 0:6502de955845 | 54 | }; |
| okano | 0:6502de955845 | 55 | |
| okano | 0:6502de955845 | 56 | |
| okano | 0:6502de955845 | 57 | class light_sensor { |
| okano | 0:6502de955845 | 58 | public: |
| okano | 0:6502de955845 | 59 | |
| okano | 0:6502de955845 | 60 | light_sensor() { |
| okano | 0:6502de955845 | 61 | char cmd[ 2 ]; |
| okano | 0:6502de955845 | 62 | |
| okano | 0:6502de955845 | 63 | cmd[ 0 ] = 0x00; |
| okano | 0:6502de955845 | 64 | cmd[ 1 ] = 0x80; |
| okano | 0:6502de955845 | 65 | i2c.write( ISL29003_addr, cmd, 2 ); |
| okano | 0:6502de955845 | 66 | |
| okano | 0:6502de955845 | 67 | cmd[ 0 ] = 0x01; |
| okano | 0:6502de955845 | 68 | cmd[ 1 ] = 0x00; |
| okano | 0:6502de955845 | 69 | i2c.write( ISL29003_addr, cmd, 2 ); |
| okano | 0:6502de955845 | 70 | } |
| okano | 0:6502de955845 | 71 | |
| okano | 0:6502de955845 | 72 | ~light_sensor() { |
| okano | 0:6502de955845 | 73 | } |
| okano | 0:6502de955845 | 74 | |
| okano | 0:6502de955845 | 75 | operator short( void ) { |
| okano | 0:6502de955845 | 76 | |
| okano | 0:6502de955845 | 77 | short v; |
| okano | 0:6502de955845 | 78 | char cmd; |
| okano | 0:6502de955845 | 79 | |
| okano | 0:6502de955845 | 80 | cmd = 0x04; |
| okano | 0:6502de955845 | 81 | i2c.write( ISL29003_addr, &cmd, 1 ); |
| okano | 0:6502de955845 | 82 | i2c.read( ISL29003_addr, &cmd, 1 ); |
| okano | 0:6502de955845 | 83 | v = cmd; |
| okano | 0:6502de955845 | 84 | |
| okano | 0:6502de955845 | 85 | cmd = 0x05; |
| okano | 0:6502de955845 | 86 | i2c.write( ISL29003_addr, &cmd, 1 ); |
| okano | 0:6502de955845 | 87 | i2c.read( ISL29003_addr, &cmd, 1 ); |
| okano | 0:6502de955845 | 88 | |
| okano | 0:6502de955845 | 89 | return( (((short)cmd) << 8) | v ); |
| okano | 0:6502de955845 | 90 | } |
| okano | 0:6502de955845 | 91 | }; |
| okano | 0:6502de955845 | 92 | |
| okano | 0:6502de955845 | 93 | baseboard_led_array ledarr; |
| okano | 0:6502de955845 | 94 | light_sensor sensor; |
| okano | 0:6502de955845 | 95 | |
| okano | 0:6502de955845 | 96 | int main() { |
| okano | 0:6502de955845 | 97 | |
| okano | 0:6502de955845 | 98 | unsigned long c = 0x00000F0F; |
| okano | 0:6502de955845 | 99 | short b; |
| okano | 0:6502de955845 | 100 | |
| okano | 0:6502de955845 | 101 | while ( 1 ) { |
| okano | 0:6502de955845 | 102 | |
| okano | 0:6502de955845 | 103 | b = sensor >> 6; |
| okano | 0:6502de955845 | 104 | ledarr.pwm0( b > 255 ? 255 : (char)b ); |
| okano | 0:6502de955845 | 105 | |
| okano | 0:6502de955845 | 106 | c <<= 1; |
| okano | 0:6502de955845 | 107 | c |= c & 0x10000 ? 0x1 : 0x0; |
| okano | 0:6502de955845 | 108 | ledarr = c; |
| okano | 0:6502de955845 | 109 | |
| okano | 0:6502de955845 | 110 | wait( 0.05 ); |
| okano | 0:6502de955845 | 111 | } |
| okano | 0:6502de955845 | 112 | } |
| okano | 0:6502de955845 | 113 |