Thomas Butler / microbitdisplayUSBSerial

Program to demonstrate NXP semiconductor's PCA9955B chip working with the BBC micro:bit

Dependencies:   PCA995xA microbit

Fork of PCA9955A_Hello by InetrfaceProducts NXP

This is a simple program that allows you to control each port on a PCA9955B connected over i2c to a BBC micro:bit using a simple USB serial communication program.

I've written it to work with the 2 digit SMD soldering kit I designed. Drop me an email at tb942@hotmail.co.uk for further info on that...

main.cpp@2:cfa5103184b1, 2015-03-04 (annotated)

Committer:
nxp_ip
Date:
Wed Mar 04 10:33:14 2015 +0000
Revision:
2:cfa5103184b1
Parent:
1:8b5c26cc269c
Child:
3:a67c21ad4173
Library updated

Who changed what in which revision?

UserRevisionLine numberNew contents of line
nxp_ip 0:ec8cc77909e5 1 #include "mbed.h"
nxp_ip 0:ec8cc77909e5 2
nxp_ip 0:ec8cc77909e5 3 #include "PCA9955A.h"
nxp_ip 0:ec8cc77909e5 4 PCA9955A led_cntlr( p28, p27, 0x02 ); // SDA, SCL, Slave_address(option)
nxp_ip 0:ec8cc77909e5 5
nxp_ip 1:8b5c26cc269c 6 int main()
nxp_ip 0:ec8cc77909e5 7 {
nxp_ip 0:ec8cc77909e5 8 led_cntlr.current( ALLPORTS, 1.0 ); // Set all ports output current 100%
nxp_ip 0:ec8cc77909e5 9
nxp_ip 0:ec8cc77909e5 10 while(1) {
nxp_ip 0:ec8cc77909e5 11 for ( int port = 0; port < led_cntlr.number_of_ports(); port++ ) {
nxp_ip 0:ec8cc77909e5 12 for ( int i = 1; i <= 100; i++ ) {
nxp_ip 0:ec8cc77909e5 13 led_cntlr.pwm( port, (float)i / 100.0 );
nxp_ip 0:ec8cc77909e5 14 wait( 0.01 );
nxp_ip 0:ec8cc77909e5 15 }
nxp_ip 0:ec8cc77909e5 16 }
nxp_ip 0:ec8cc77909e5 17 led_cntlr.pwm( ALLPORTS, 0.0 ); // Set all ports output PWM 0%
nxp_ip 0:ec8cc77909e5 18 }
nxp_ip 0:ec8cc77909e5 19 }
nxp_ip 2:cfa5103184b1 20
nxp_ip 2:cfa5103184b1 21
nxp_ip 2:cfa5103184b1 22
nxp_ip 2:cfa5103184b1 23 #if 0 // Sample of using LedPwmOut API
nxp_ip 2:cfa5103184b1 24 #include "mbed.h"
nxp_ip 2:cfa5103184b1 25 #include "PCA9955A.h"
nxp_ip 2:cfa5103184b1 26
nxp_ip 2:cfa5103184b1 27 PCA9955A led_cntlr( p28, p27, 0x02 );
nxp_ip 2:cfa5103184b1 28 LedPwmOutCC leds[] = {
nxp_ip 2:cfa5103184b1 29 LedPwmOutCC( led_cntlr, L0 ),
nxp_ip 2:cfa5103184b1 30 LedPwmOutCC( led_cntlr, L4 ),
nxp_ip 2:cfa5103184b1 31 LedPwmOutCC( led_cntlr, L8 ),
nxp_ip 2:cfa5103184b1 32 LedPwmOutCC( led_cntlr, L12 ),
nxp_ip 2:cfa5103184b1 33
nxp_ip 2:cfa5103184b1 34 LedPwmOutCC( led_cntlr, L1 ),
nxp_ip 2:cfa5103184b1 35 LedPwmOutCC( led_cntlr, L5 ),
nxp_ip 2:cfa5103184b1 36 LedPwmOutCC( led_cntlr, L9 ),
nxp_ip 2:cfa5103184b1 37 LedPwmOutCC( led_cntlr, L13 ),
nxp_ip 2:cfa5103184b1 38
nxp_ip 2:cfa5103184b1 39 LedPwmOutCC( led_cntlr, L2 ),
nxp_ip 2:cfa5103184b1 40 LedPwmOutCC( led_cntlr, L6 ),
nxp_ip 2:cfa5103184b1 41 LedPwmOutCC( led_cntlr, L10 ),
nxp_ip 2:cfa5103184b1 42 LedPwmOutCC( led_cntlr, L14 ),
nxp_ip 2:cfa5103184b1 43
nxp_ip 2:cfa5103184b1 44 LedPwmOutCC( led_cntlr, L3 ),
nxp_ip 2:cfa5103184b1 45 LedPwmOutCC( led_cntlr, L7 ),
nxp_ip 2:cfa5103184b1 46 LedPwmOutCC( led_cntlr, L11 ),
nxp_ip 2:cfa5103184b1 47 LedPwmOutCC( led_cntlr, L15 ),
nxp_ip 2:cfa5103184b1 48
nxp_ip 2:cfa5103184b1 49 };
nxp_ip 2:cfa5103184b1 50
nxp_ip 2:cfa5103184b1 51 int main()
nxp_ip 2:cfa5103184b1 52 {
nxp_ip 2:cfa5103184b1 53 for ( int ch = 0; ch < 16; ch++ )
nxp_ip 2:cfa5103184b1 54 leds[ ch ] = 1.0;
nxp_ip 2:cfa5103184b1 55 for ( int ch = 0; ch < 16; ch++ )
nxp_ip 2:cfa5103184b1 56 leds[ ch ].current( 0.0 );
nxp_ip 2:cfa5103184b1 57
nxp_ip 2:cfa5103184b1 58 while(1) {
nxp_ip 2:cfa5103184b1 59 for ( int ch = 0; ch < 16; ch++ ) {
nxp_ip 2:cfa5103184b1 60 for ( float p = 0.0; p < 1.0; p += 0.01 ) {
nxp_ip 2:cfa5103184b1 61 // leds[ ch ] = p;
nxp_ip 2:cfa5103184b1 62 leds[ ch ].current( p );
nxp_ip 2:cfa5103184b1 63 wait( 0.01 );
nxp_ip 2:cfa5103184b1 64 }
nxp_ip 2:cfa5103184b1 65 }
nxp_ip 2:cfa5103184b1 66 for ( float c = 1.0; c > 0.0; c -= 0.01 ) {
nxp_ip 2:cfa5103184b1 67 for ( int ch = 0; ch < 16; ch++ ) {
nxp_ip 2:cfa5103184b1 68 leds[ ch ].current( c );
nxp_ip 2:cfa5103184b1 69
nxp_ip 2:cfa5103184b1 70 }
nxp_ip 2:cfa5103184b1 71 wait( 0.01 );
nxp_ip 2:cfa5103184b1 72 }
nxp_ip 2:cfa5103184b1 73 }
nxp_ip 2:cfa5103184b1 74 }
nxp_ip 2:cfa5103184b1 75 #endif