main.cpp

00001 #include "mbed.h"
00002 
00003 #include "PCA9955A.h"
00004 PCA9955A    led_cntlr( p28, p27, 0x02 );    //  SDA, SCL, Slave_address(option)
00005 
00006 #define GRADATION_PERIOD            2.8
00007 
00008 #define MANUAL_BLINK_PERIOD         0.1
00009 #define MANUAL_BLINK_ON_DURATION    0.03
00010 
00011 int main()
00012 {
00013     //  Set current ourput maximum (1.0 = 100%)
00014     led_cntlr.current( ALLPORTS, 1.0 );
00015     
00016     //  Gradation control grouping
00017     led_cntlr.gradation_group_setting( 0,  1 ); //  Port  1 is assigned to group 0
00018     led_cntlr.gradation_group_setting( 0,  5 ); //  Port  5 is assigned to group 0
00019     led_cntlr.gradation_group_setting( 0,  9 ); //  Port  9 is assigned to group 0
00020     led_cntlr.gradation_group_setting( 0, 13 ); //  Port 13 is assigned to group 0
00021     led_cntlr.gradation_group_setting( 1,  2 ); //  Port  2 is assigned to group 1
00022     led_cntlr.gradation_group_setting( 1,  6 ); //  Port  6 is assigned to group 1
00023     led_cntlr.gradation_group_setting( 1, 10 ); //  Port 10 is assigned to group 1
00024     led_cntlr.gradation_group_setting( 1, 14 ); //  Port 14 is assigned to group 1
00025     led_cntlr.gradation_group_setting( 2,  3 ); //  Port  3 is assigned to group 2
00026     led_cntlr.gradation_group_setting( 2,  7 ); //  Port  7 is assigned to group 2
00027     led_cntlr.gradation_group_setting( 2, 11 ); //  Port 11 is assigned to group 2
00028     led_cntlr.gradation_group_setting( 2, 15 ); //  Port 15 is assigned to group 2
00029     //  Port 0, 4, 8 and 12 are not assigned to any groups
00030     //  Group 3 has no assigned port
00031 
00032     //  Making same gradation shape to group 0, 1 and 2
00033     //  The gradation shape will be total 6 seconds cycle including 2 seconds LED-OFF
00034     float cycle   =
00035     led_cntlr.gradation_ramp_setting( 0, GRADATION_PERIOD, HOLD_0_00_SEC, HOLD_0_75_SEC, RAMP_UP_DOWN );
00036     led_cntlr.gradation_ramp_setting( 1, GRADATION_PERIOD, HOLD_0_00_SEC, HOLD_0_75_SEC, RAMP_UP_DOWN );
00037     led_cntlr.gradation_ramp_setting( 2, GRADATION_PERIOD, HOLD_0_00_SEC, HOLD_0_75_SEC, RAMP_UP_DOWN );
00038 
00039     //  printf( "cycle = %f\r\n", cycle );
00040 
00041     //  Start group 0
00042     led_cntlr.gradation_start( 0 );
00043 
00044     //  Start group 1 (after 1/3 cycle delay)
00045     wait( cycle / 3.0 );
00046     led_cntlr.gradation_start( 1 );
00047 
00048     //  Start group 2 (after 1/3 cycle delay)
00049     wait( cycle / 3.0 );
00050     led_cntlr.gradation_start( 2 );
00051 
00052     //
00053     //  Now the gradation control for 3 groups are working
00054     //
00055 
00056     //
00057     //  Next while loop perform manual control for Rest of ports (0, 4, 8 and 12).
00058     //  You will see the operation for manual controll ports will be stopped if the I2C line is removed.
00059     //  But it continues the gradation control while power supply is available
00060     //
00061     while(1) {
00062         for ( int i = 0; i <= 12; i += 4 ) {
00063             led_cntlr.pwm(  i, 1.0 );
00064             wait( MANUAL_BLINK_ON_DURATION );
00065             led_cntlr.pwm(  i, 0.0 );
00066             wait( MANUAL_BLINK_PERIOD - MANUAL_BLINK_ON_DURATION );
00067         }
00068     }
00069 }