PCA9538_Expander - PCA9538 I2C Expander

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PCA9538 I2C Expander

Dependents: PCA9538_example MAX7314_Expander

PCA9538.h@0:d0e0b38e5991, 2011-02-02 (annotated)

Committer:: Suky
Date:: Wed Feb 02 21:20:33 2011 +0000
Revision:: 0:d0e0b38e5991

Who changed what in which revision?

User	Revision	Line number	New contents of line
Suky	0:d0e0b38e5991	1	/*
Suky	0:d0e0b38e5991	2	\file PCA9538.h
Suky	0:d0e0b38e5991	3	\version: 1.0
Suky	0:d0e0b38e5991	4
Suky	0:d0e0b38e5991	5	\brief Este fichero contiene class para control de PCA9538 creando pin digitales
Suky	0:d0e0b38e5991	6	de salida o entrada, o control por registro (8-bits).
Suky	0:d0e0b38e5991	7
Suky	0:d0e0b38e5991	8	\web www.micros-designs.com.ar
Suky	0:d0e0b38e5991	9	\date 31/01/11
Suky	0:d0e0b38e5991	10
Suky	0:d0e0b38e5991	11	- Version Log --------------------------------------------------------------
Suky	0:d0e0b38e5991	12	* Fecha Autor Comentarios *
Suky	0:d0e0b38e5991	13	----------------------------------------------------------------------------
Suky	0:d0e0b38e5991	14	* 31/01/11 Suky Original *
Suky	0:d0e0b38e5991	15	----------------------------------------------------------------------------/
Suky	0:d0e0b38e5991	16	///////////////////////////////////////////////////////////////////////////
Suky	0:d0e0b38e5991	17	//// ////
Suky	0:d0e0b38e5991	18	//// ////
Suky	0:d0e0b38e5991	19	//// (C) Copyright 2011 www.micros-designs.com.ar ////
Suky	0:d0e0b38e5991	20	//// Este código puede ser usado, modificado y distribuido libremente ////
Suky	0:d0e0b38e5991	21	//// sin eliminar esta cabecera y sin garantía de ningún tipo. ////
Suky	0:d0e0b38e5991	22	//// ////
Suky	0:d0e0b38e5991	23	//// ////
Suky	0:d0e0b38e5991	24	///////////////////////////////////////////////////////////////////////////
Suky	0:d0e0b38e5991	25
Suky	0:d0e0b38e5991	26	/* EXAMPLE
Suky	0:d0e0b38e5991	27	#include "mbed.h"
Suky	0:d0e0b38e5991	28	#include "PCA9538.h"
Suky	0:d0e0b38e5991	29
Suky	0:d0e0b38e5991	30	//PCA9538 MyExpand(p9,p10,0x70,p21); // sda,scl,address,Interrupts
Suky	0:d0e0b38e5991	31	DigitalOut myled(LED1);
Suky	0:d0e0b38e5991	32	DigitalOut myled2(LED2);
Suky	0:d0e0b38e5991	33	PCA9538PinOut myled3(exp_p4,p9,p10,0x70); // pin del PCA,sda,scl,address
Suky	0:d0e0b38e5991	34	PCA9538PinOut myled4(exp_p7,p9,p10,0x70);
Suky	0:d0e0b38e5991	35	PCA9538PinIn mypuls(exp_p0,p9,p10,0x70);
Suky	0:d0e0b38e5991	36	//void vISRExpand(void);
Suky	0:d0e0b38e5991	37
Suky	0:d0e0b38e5991	38	int main() {
Suky	0:d0e0b38e5991	39	//MyExpand.vInit(0x0F,&vISRExpand);
Suky	0:d0e0b38e5991	40	//MyExpand.vWrite(0x00);
Suky	0:d0e0b38e5991	41	while(1) {
Suky	0:d0e0b38e5991	42	if(mypuls==0){
Suky	0:d0e0b38e5991	43	myled2=1;
Suky	0:d0e0b38e5991	44	wait(0.3);
Suky	0:d0e0b38e5991	45	myled2=0;
Suky	0:d0e0b38e5991	46	wait(0.3);
Suky	0:d0e0b38e5991	47	}else{
Suky	0:d0e0b38e5991	48	myled3=1;
Suky	0:d0e0b38e5991	49	myled4=1;
Suky	0:d0e0b38e5991	50	myled=myled3;
Suky	0:d0e0b38e5991	51	wait(0.5);
Suky	0:d0e0b38e5991	52	myled = 0;
Suky	0:d0e0b38e5991	53	myled3=0;
Suky	0:d0e0b38e5991	54	myled4=0;
Suky	0:d0e0b38e5991	55	wait(0.5);
Suky	0:d0e0b38e5991	56	}
Suky	0:d0e0b38e5991	57	}
Suky	0:d0e0b38e5991	58	}
Suky	0:d0e0b38e5991	59
Suky	0:d0e0b38e5991	60
Suky	0:d0e0b38e5991	61	//void vISRExpand(void){
Suky	0:d0e0b38e5991	62	//
Suky	0:d0e0b38e5991	63	// myled2=!myled2;
Suky	0:d0e0b38e5991	64	// MyExpand.vWrite(MyExpand.cRead()<<4);
Suky	0:d0e0b38e5991	65	//}
Suky	0:d0e0b38e5991	66	*/
Suky	0:d0e0b38e5991	67	#include "mbed.h"
Suky	0:d0e0b38e5991	68
Suky	0:d0e0b38e5991	69	enum ExpPinName{
Suky	0:d0e0b38e5991	70	exp_p0=0,
Suky	0:d0e0b38e5991	71	exp_p1,
Suky	0:d0e0b38e5991	72	exp_p2,
Suky	0:d0e0b38e5991	73	exp_p3,
Suky	0:d0e0b38e5991	74	exp_p4,
Suky	0:d0e0b38e5991	75	exp_p5,
Suky	0:d0e0b38e5991	76	exp_p6,
Suky	0:d0e0b38e5991	77	exp_p7,
Suky	0:d0e0b38e5991	78	};
Suky	0:d0e0b38e5991	79
Suky	0:d0e0b38e5991	80	class PCA9538PinOut{
Suky	0:d0e0b38e5991	81	public:
Suky	0:d0e0b38e5991	82	PCA9538PinOut(ExpPinName Pin,PinName PIN_SDA,PinName PIN_SCL,unsigned char Address);
Suky	0:d0e0b38e5991	83	void vWrite(int value);
Suky	0:d0e0b38e5991	84	int read();
Suky	0:d0e0b38e5991	85	#ifdef MBED_OPERATORS
Suky	0:d0e0b38e5991	86	PCA9538PinOut& operator= (int value);
Suky	0:d0e0b38e5991	87	operator int();
Suky	0:d0e0b38e5991	88	#endif
Suky	0:d0e0b38e5991	89	protected:
Suky	0:d0e0b38e5991	90	ExpPinName _Pin;
Suky	0:d0e0b38e5991	91	unsigned char _Address;
Suky	0:d0e0b38e5991	92	I2C Bus;
Suky	0:d0e0b38e5991	93	};
Suky	0:d0e0b38e5991	94
Suky	0:d0e0b38e5991	95	PCA9538PinOut::PCA9538PinOut(ExpPinName Pin,PinName PIN_SDA,PinName PIN_SCL,unsigned char Address)
Suky	0:d0e0b38e5991	96	:Bus(PIN_SDA,PIN_SCL),_Pin(Pin),_Address(Address<<1){
Suky	0:d0e0b38e5991	97	unsigned char Temp;
Suky	0:d0e0b38e5991	98
Suky	0:d0e0b38e5991	99	Bus.start();
Suky	0:d0e0b38e5991	100	Bus.write(_Address & 0xFE);
Suky	0:d0e0b38e5991	101	Bus.write(0x03);
Suky	0:d0e0b38e5991	102	Bus.start();
Suky	0:d0e0b38e5991	103	Bus.write(_Address \| 0x01);
Suky	0:d0e0b38e5991	104	Temp=Bus.read(0);
Suky	0:d0e0b38e5991	105	Bus.stop();
Suky	0:d0e0b38e5991	106
Suky	0:d0e0b38e5991	107	Bus.start();
Suky	0:d0e0b38e5991	108	Bus.write(_Address & 0xFE);
Suky	0:d0e0b38e5991	109	Bus.write(0x03);
Suky	0:d0e0b38e5991	110	Bus.write((~(0x01<<_Pin))&Temp);
Suky	0:d0e0b38e5991	111	Bus.stop();
Suky	0:d0e0b38e5991	112	}
Suky	0:d0e0b38e5991	113
Suky	0:d0e0b38e5991	114	void PCA9538PinOut::vWrite(int value){
Suky	0:d0e0b38e5991	115	unsigned char Temp;
Suky	0:d0e0b38e5991	116
Suky	0:d0e0b38e5991	117	Bus.start();
Suky	0:d0e0b38e5991	118	Bus.write(_Address & 0xFE);
Suky	0:d0e0b38e5991	119	Bus.write(0x01);
Suky	0:d0e0b38e5991	120	Bus.start();
Suky	0:d0e0b38e5991	121	Bus.write(_Address \| 0x01);
Suky	0:d0e0b38e5991	122	Temp=Bus.read(0);
Suky	0:d0e0b38e5991	123	Bus.stop();
Suky	0:d0e0b38e5991	124
Suky	0:d0e0b38e5991	125	Bus.start();
Suky	0:d0e0b38e5991	126	Bus.write(_Address & 0xFE);
Suky	0:d0e0b38e5991	127	Bus.write(0x01);
Suky	0:d0e0b38e5991	128	if(value==0){
Suky	0:d0e0b38e5991	129	Bus.write((~(0x01<<_Pin))&Temp);
Suky	0:d0e0b38e5991	130	}else{
Suky	0:d0e0b38e5991	131	Bus.write((0x01<<_Pin)\|Temp);
Suky	0:d0e0b38e5991	132	}
Suky	0:d0e0b38e5991	133	Bus.stop();
Suky	0:d0e0b38e5991	134	}
Suky	0:d0e0b38e5991	135
Suky	0:d0e0b38e5991	136	int PCA9538PinOut::read(){
Suky	0:d0e0b38e5991	137	unsigned char Temp;
Suky	0:d0e0b38e5991	138
Suky	0:d0e0b38e5991	139	Bus.start();
Suky	0:d0e0b38e5991	140	Bus.write(_Address & 0xFE);
Suky	0:d0e0b38e5991	141	Bus.write(0x01);
Suky	0:d0e0b38e5991	142	Bus.start();
Suky	0:d0e0b38e5991	143	Bus.write(_Address \| 0x01);
Suky	0:d0e0b38e5991	144	Temp=Bus.read(0);
Suky	0:d0e0b38e5991	145	Bus.stop();
Suky	0:d0e0b38e5991	146
Suky	0:d0e0b38e5991	147	return((Temp>>_Pin)&0x01);
Suky	0:d0e0b38e5991	148	}
Suky	0:d0e0b38e5991	149
Suky	0:d0e0b38e5991	150	PCA9538PinOut& PCA9538PinOut::operator= (int value){
Suky	0:d0e0b38e5991	151	vWrite(value);
Suky	0:d0e0b38e5991	152	}
Suky	0:d0e0b38e5991	153
Suky	0:d0e0b38e5991	154	PCA9538PinOut::operator int(){
Suky	0:d0e0b38e5991	155
Suky	0:d0e0b38e5991	156	return(read());
Suky	0:d0e0b38e5991	157	}
Suky	0:d0e0b38e5991	158	//*****************************************************************************
Suky	0:d0e0b38e5991	159	class PCA9538PinIn{
Suky	0:d0e0b38e5991	160	public:
Suky	0:d0e0b38e5991	161	PCA9538PinIn(ExpPinName Pin,PinName PIN_SDA,PinName PIN_SCL,unsigned char Address);
Suky	0:d0e0b38e5991	162	int read();
Suky	0:d0e0b38e5991	163	#ifdef MBED_OPERATORS
Suky	0:d0e0b38e5991	164	operator int();
Suky	0:d0e0b38e5991	165	#endif
Suky	0:d0e0b38e5991	166	protected:
Suky	0:d0e0b38e5991	167	ExpPinName _Pin;
Suky	0:d0e0b38e5991	168	unsigned char _Address;
Suky	0:d0e0b38e5991	169	I2C Bus;
Suky	0:d0e0b38e5991	170	};
Suky	0:d0e0b38e5991	171
Suky	0:d0e0b38e5991	172	PCA9538PinIn::PCA9538PinIn(ExpPinName Pin,PinName PIN_SDA,PinName PIN_SCL,unsigned char Address)
Suky	0:d0e0b38e5991	173	:Bus(PIN_SDA,PIN_SCL),_Pin(Pin),_Address(Address<<1){
Suky	0:d0e0b38e5991	174	unsigned char Temp;
Suky	0:d0e0b38e5991	175
Suky	0:d0e0b38e5991	176	Bus.start();
Suky	0:d0e0b38e5991	177	Bus.write(_Address & 0xFE);
Suky	0:d0e0b38e5991	178	Bus.write(0x03);
Suky	0:d0e0b38e5991	179	Bus.start();
Suky	0:d0e0b38e5991	180	Bus.write(_Address \| 0x01);
Suky	0:d0e0b38e5991	181	Temp=Bus.read(0);
Suky	0:d0e0b38e5991	182	Bus.stop();
Suky	0:d0e0b38e5991	183
Suky	0:d0e0b38e5991	184	Bus.start();
Suky	0:d0e0b38e5991	185	Bus.write(_Address & 0xFE);
Suky	0:d0e0b38e5991	186	Bus.write(0x03);
Suky	0:d0e0b38e5991	187	Bus.write((0x01<<_Pin)\|Temp);
Suky	0:d0e0b38e5991	188	Bus.stop();
Suky	0:d0e0b38e5991	189	}
Suky	0:d0e0b38e5991	190
Suky	0:d0e0b38e5991	191	int PCA9538PinIn::read(){
Suky	0:d0e0b38e5991	192	unsigned char Temp;
Suky	0:d0e0b38e5991	193
Suky	0:d0e0b38e5991	194	Bus.start();
Suky	0:d0e0b38e5991	195	Bus.write(_Address & 0xFE);
Suky	0:d0e0b38e5991	196	Bus.write(0x00);
Suky	0:d0e0b38e5991	197	Bus.start();
Suky	0:d0e0b38e5991	198	Bus.write(_Address \| 0x01);
Suky	0:d0e0b38e5991	199	Temp=Bus.read(0);
Suky	0:d0e0b38e5991	200	Bus.stop();
Suky	0:d0e0b38e5991	201
Suky	0:d0e0b38e5991	202	return((Temp>>_Pin)&0x01);
Suky	0:d0e0b38e5991	203	}
Suky	0:d0e0b38e5991	204
Suky	0:d0e0b38e5991	205	PCA9538PinIn::operator int(){
Suky	0:d0e0b38e5991	206
Suky	0:d0e0b38e5991	207	return(read());
Suky	0:d0e0b38e5991	208	}
Suky	0:d0e0b38e5991	209	//*****************************************************************************
Suky	0:d0e0b38e5991	210	class PCA9538{
Suky	0:d0e0b38e5991	211	public:
Suky	0:d0e0b38e5991	212	PCA9538(PinName PIN_SDA,PinName PIN_SCL,unsigned char Address,PinName PIN_INT=NC);
Suky	0:d0e0b38e5991	213	void vInit(unsigned char Dir,void (*fptr)(void));
Suky	0:d0e0b38e5991	214	void vSetConfiguration(unsigned char Dir);
Suky	0:d0e0b38e5991	215	void vSetPolarity(unsigned char Pol);
Suky	0:d0e0b38e5991	216	unsigned char cRead(void);
Suky	0:d0e0b38e5991	217	void vWrite(unsigned char Data);
Suky	0:d0e0b38e5991	218	void vEnableSetInterrupt(void (*fptr)(void));
Suky	0:d0e0b38e5991	219	void vDisableInterrupt(void);
Suky	0:d0e0b38e5991	220	bool bReadPinINT(void);
Suky	0:d0e0b38e5991	221	protected:
Suky	0:d0e0b38e5991	222	I2C Bus;
Suky	0:d0e0b38e5991	223	InterruptIn PCA9538_Event;
Suky	0:d0e0b38e5991	224	DigitalIn _PIN_INT;
Suky	0:d0e0b38e5991	225	unsigned char _Address;
Suky	0:d0e0b38e5991	226	};
Suky	0:d0e0b38e5991	227
Suky	0:d0e0b38e5991	228	PCA9538::PCA9538(PinName PIN_SDA,PinName PIN_SCL,unsigned char Address,PinName PIN_INT)
Suky	0:d0e0b38e5991	229	: Bus(PIN_SDA,PIN_SCL),_PIN_INT(PIN_INT),PCA9538_Event(PIN_INT){
Suky	0:d0e0b38e5991	230	_Address=Address<<1;
Suky	0:d0e0b38e5991	231	}
Suky	0:d0e0b38e5991	232
Suky	0:d0e0b38e5991	233	void PCA9538::vInit(unsigned char Dir,void (*fptr)(void)){
Suky	0:d0e0b38e5991	234
Suky	0:d0e0b38e5991	235	//Bus.frequency(400000);
Suky	0:d0e0b38e5991	236
Suky	0:d0e0b38e5991	237	Bus.start();
Suky	0:d0e0b38e5991	238	Bus.write(_Address & 0xFE);
Suky	0:d0e0b38e5991	239	Bus.write(0x03);
Suky	0:d0e0b38e5991	240	Bus.write(Dir);
Suky	0:d0e0b38e5991	241	Bus.stop();
Suky	0:d0e0b38e5991	242
Suky	0:d0e0b38e5991	243	if (fptr!=NULL){
Suky	0:d0e0b38e5991	244	PCA9538_Event.fall(fptr);
Suky	0:d0e0b38e5991	245	}
Suky	0:d0e0b38e5991	246	}
Suky	0:d0e0b38e5991	247
Suky	0:d0e0b38e5991	248	void PCA9538::vSetConfiguration(unsigned char Dir){
Suky	0:d0e0b38e5991	249
Suky	0:d0e0b38e5991	250	Bus.start();
Suky	0:d0e0b38e5991	251	Bus.write(_Address & 0xFE);
Suky	0:d0e0b38e5991	252	Bus.write(0x03);
Suky	0:d0e0b38e5991	253	Bus.write(Dir);
Suky	0:d0e0b38e5991	254	Bus.stop();
Suky	0:d0e0b38e5991	255	}
Suky	0:d0e0b38e5991	256
Suky	0:d0e0b38e5991	257	void PCA9538::vSetPolarity(unsigned char Pol){
Suky	0:d0e0b38e5991	258
Suky	0:d0e0b38e5991	259	Bus.start();
Suky	0:d0e0b38e5991	260	Bus.write(_Address & 0xFE);
Suky	0:d0e0b38e5991	261	Bus.write(0x02);
Suky	0:d0e0b38e5991	262	Bus.write(Pol);
Suky	0:d0e0b38e5991	263	Bus.stop();
Suky	0:d0e0b38e5991	264	}
Suky	0:d0e0b38e5991	265
Suky	0:d0e0b38e5991	266	unsigned char PCA9538::cRead(void){
Suky	0:d0e0b38e5991	267	unsigned char Temp;
Suky	0:d0e0b38e5991	268
Suky	0:d0e0b38e5991	269	Bus.start();
Suky	0:d0e0b38e5991	270	Bus.write(_Address & 0xFE);
Suky	0:d0e0b38e5991	271	Bus.write(0x00);
Suky	0:d0e0b38e5991	272	Bus.start();
Suky	0:d0e0b38e5991	273	Bus.write(_Address \| 0x01);
Suky	0:d0e0b38e5991	274	Temp=Bus.read(0);
Suky	0:d0e0b38e5991	275	Bus.stop();
Suky	0:d0e0b38e5991	276
Suky	0:d0e0b38e5991	277	return(Temp);
Suky	0:d0e0b38e5991	278	}
Suky	0:d0e0b38e5991	279
Suky	0:d0e0b38e5991	280	void PCA9538::vWrite(unsigned char Data){
Suky	0:d0e0b38e5991	281
Suky	0:d0e0b38e5991	282	Bus.start();
Suky	0:d0e0b38e5991	283	Bus.write(_Address & 0xFE);
Suky	0:d0e0b38e5991	284	Bus.write(0x01);
Suky	0:d0e0b38e5991	285	Bus.write(Data);
Suky	0:d0e0b38e5991	286	Bus.stop();
Suky	0:d0e0b38e5991	287	}
Suky	0:d0e0b38e5991	288
Suky	0:d0e0b38e5991	289	void PCA9538::vEnableSetInterrupt(void (*fptr)(void)){
Suky	0:d0e0b38e5991	290	PCA9538_Event.fall(fptr);
Suky	0:d0e0b38e5991	291	}
Suky	0:d0e0b38e5991	292
Suky	0:d0e0b38e5991	293	void PCA9538::vDisableInterrupt(void){
Suky	0:d0e0b38e5991	294	PCA9538_Event.fall(NULL);
Suky	0:d0e0b38e5991	295	}
Suky	0:d0e0b38e5991	296
Suky	0:d0e0b38e5991	297	bool PCA9538::bReadPinINT(void){
Suky	0:d0e0b38e5991	298	return(_PIN_INT);
Suky	0:d0e0b38e5991	299	}

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Type:	Library
Created:	02 Feb 2011
Imports:	48
Forks:	0
Commits:	1
Dependents:	2
Dependencies:	0
Followers:	3

PCA9538.h@0:d0e0b38e5991, 2011-02-02 (annotated)

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