Andriy Makukha / PCAL6416

The PCAL6416A is a low-voltage 16-bit general purpose I/O (GPIO) expander with interrupt. This component library is compatible to basic operation as GPIO expanders: PCAL6416A, PCAL9555, PCA9555, PCA9535, PCA9539, PCAL9554, PCA9554 and PCA9538. On addition to this, this library is including mbed-SDK-style APIs. APIs that similar to DigitaiInOut, DigitalOut, DigitalIn, BusInOUt, BusOut and BusIn are available.

This is a copy of the PCA9555 library by Akifumi "Tedd" OKANO, which is compatible with PCAL6416A chip.

base_classes/PCAL955x.h@0:035111d3d631, 2017-02-15 (annotated)

Committer:
andriym
Date:
Wed Feb 15 10:07:59 2017 +0000
Revision:
0:035111d3d631
A change of name for the PCAL955x library to make it searchable for people needing PCAL6416A library.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
andriym 0:035111d3d631 1 /** PCAL955x GPIO with Agile I/O, interrupt and weak pull-up family
andriym 0:035111d3d631 2 *
andriym 0:035111d3d631 3 * Abstract class for PCAL955x/PCAL6416 family
andriym 0:035111d3d631 4 * No instance can be made from this class
andriym 0:035111d3d631 5 *
andriym 0:035111d3d631 6 * @class PCAL955x
andriym 0:035111d3d631 7 * @author Akifumi (Tedd) OKANO, NXP Semiconductors
andriym 0:035111d3d631 8 * @version 0.5.1
andriym 0:035111d3d631 9 * @date 07-Mar-2015
andriym 0:035111d3d631 10 * @modified 15-Feb-2017, by Andriy Makukha, Shenzhen MZJ Technology Co.
andriym 0:035111d3d631 11 *
andriym 0:035111d3d631 12 * Released under the Apache 2 license
andriym 0:035111d3d631 13 */
andriym 0:035111d3d631 14
andriym 0:035111d3d631 15 #ifndef MBED_PCAL955x
andriym 0:035111d3d631 16 #define MBED_PCAL955x
andriym 0:035111d3d631 17
andriym 0:035111d3d631 18 #include "mbed.h"
andriym 0:035111d3d631 19 #include "CompGpioExp.h"
andriym 0:035111d3d631 20
andriym 0:035111d3d631 21 /** Abstract class for PCAL955x/PCAL6416 family
andriym 0:035111d3d631 22 *
andriym 0:035111d3d631 23 * No instance can be made from this class
andriym 0:035111d3d631 24 */
andriym 0:035111d3d631 25 class PCAL955x : public CompGpioExp
andriym 0:035111d3d631 26 {
andriym 0:035111d3d631 27 public:
andriym 0:035111d3d631 28 enum register_index {
andriym 0:035111d3d631 29 INPUT,
andriym 0:035111d3d631 30 OUTPUT,
andriym 0:035111d3d631 31 POLARITY,
andriym 0:035111d3d631 32 CONFIG,
andriym 0:035111d3d631 33 ODS0,
andriym 0:035111d3d631 34 ODS1,
andriym 0:035111d3d631 35 IN_LATCH,
andriym 0:035111d3d631 36 PULL_EN,
andriym 0:035111d3d631 37 PULL_SEL,
andriym 0:035111d3d631 38 INT_MASK,
andriym 0:035111d3d631 39 INT_STAT,
andriym 0:035111d3d631 40 OPC
andriym 0:035111d3d631 41 };
andriym 0:035111d3d631 42
andriym 0:035111d3d631 43 PCAL955x( PinName i2c_sda, PinName i2c_scl, char i2c_address = DEFAULT_I2C_ADDR );
andriym 0:035111d3d631 44 PCAL955x( I2C &i2c_obj, char i2c_address = DEFAULT_I2C_ADDR );
andriym 0:035111d3d631 45 virtual ~PCAL955x();
andriym 0:035111d3d631 46
andriym 0:035111d3d631 47 virtual void write( int pin, int value );
andriym 0:035111d3d631 48 virtual int read( int pin );
andriym 0:035111d3d631 49 virtual void configure( int pin, int value );
andriym 0:035111d3d631 50 virtual int read( void );
andriym 0:035111d3d631 51 virtual void write_with_mask( int bitpattern, int mask_bits );
andriym 0:035111d3d631 52 virtual void configure_with_mask( int bitpattern, int mask_bits );
andriym 0:035111d3d631 53
andriym 0:035111d3d631 54 void write( int bit_pattern );
andriym 0:035111d3d631 55 void polarity( int bit_pattern );
andriym 0:035111d3d631 56 void configure( int bit_pattern );
andriym 0:035111d3d631 57
andriym 0:035111d3d631 58 void interrupt_mask( int bit_pattern );
andriym 0:035111d3d631 59 int interrupt_status( void );
andriym 0:035111d3d631 60
andriym 0:035111d3d631 61 virtual int number_of_pins( void ) = 0;
andriym 0:035111d3d631 62 virtual void reg_index_write( char reg_addr, int data ) = 0;
andriym 0:035111d3d631 63 virtual int reg_index_read( char reg_addr ) = 0;
andriym 0:035111d3d631 64 operator int( void );
andriym 0:035111d3d631 65
andriym 0:035111d3d631 66 protected:
andriym 0:035111d3d631 67 enum {
andriym 0:035111d3d631 68 DEFAULT_I2C_ADDR = 0x40,
andriym 0:035111d3d631 69 };
andriym 0:035111d3d631 70
andriym 0:035111d3d631 71 void bus_write( char *dp, int length );
andriym 0:035111d3d631 72 void bus_read( char reg_addr, char *dp, int length );
andriym 0:035111d3d631 73
andriym 0:035111d3d631 74 private:
andriym 0:035111d3d631 75 I2C *i2c_p;
andriym 0:035111d3d631 76 I2C &i2c;
andriym 0:035111d3d631 77 char address; // I2C slave address
andriym 0:035111d3d631 78 int pin_state;
andriym 0:035111d3d631 79 int pin_direction;
andriym 0:035111d3d631 80 }
andriym 0:035111d3d631 81 ;
andriym 0:035111d3d631 82
andriym 0:035111d3d631 83 #endif // MBED_PCAL955x