Andriy Makukha
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.
Diff: base_classes/PCAL955x.h
- Revision:
- 0:035111d3d631
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/base_classes/PCAL955x.h Wed Feb 15 10:07:59 2017 +0000
@@ -0,0 +1,83 @@
+/** PCAL955x GPIO with Agile I/O, interrupt and weak pull-up family
+ *
+ * Abstract class for PCAL955x/PCAL6416 family
+ * No instance can be made from this class
+ *
+ * @class PCAL955x
+ * @author Akifumi (Tedd) OKANO, NXP Semiconductors
+ * @version 0.5.1
+ * @date 07-Mar-2015
+ * @modified 15-Feb-2017, by Andriy Makukha, Shenzhen MZJ Technology Co.
+ *
+ * Released under the Apache 2 license
+ */
+
+#ifndef MBED_PCAL955x
+#define MBED_PCAL955x
+
+#include "mbed.h"
+#include "CompGpioExp.h"
+
+/** Abstract class for PCAL955x/PCAL6416 family
+ *
+ * No instance can be made from this class
+ */
+class PCAL955x : public CompGpioExp
+{
+public:
+ enum register_index {
+ INPUT,
+ OUTPUT,
+ POLARITY,
+ CONFIG,
+ ODS0,
+ ODS1,
+ IN_LATCH,
+ PULL_EN,
+ PULL_SEL,
+ INT_MASK,
+ INT_STAT,
+ OPC
+ };
+
+ PCAL955x( PinName i2c_sda, PinName i2c_scl, char i2c_address = DEFAULT_I2C_ADDR );
+ PCAL955x( I2C &i2c_obj, char i2c_address = DEFAULT_I2C_ADDR );
+ virtual ~PCAL955x();
+
+ virtual void write( int pin, int value );
+ virtual int read( int pin );
+ virtual void configure( int pin, int value );
+ virtual int read( void );
+ virtual void write_with_mask( int bitpattern, int mask_bits );
+ virtual void configure_with_mask( int bitpattern, int mask_bits );
+
+ void write( int bit_pattern );
+ void polarity( int bit_pattern );
+ void configure( int bit_pattern );
+
+ void interrupt_mask( int bit_pattern );
+ int interrupt_status( void );
+
+ virtual int number_of_pins( void ) = 0;
+ virtual void reg_index_write( char reg_addr, int data ) = 0;
+ virtual int reg_index_read( char reg_addr ) = 0;
+ operator int( void );
+
+protected:
+ enum {
+ DEFAULT_I2C_ADDR = 0x40,
+ };
+
+ void bus_write( char *dp, int length );
+ void bus_read( char reg_addr, char *dp, int length );
+
+private:
+ I2C *i2c_p;
+ I2C &i2c;
+ char address; // I2C slave address
+ int pin_state;
+ int pin_direction;
+}
+;
+
+#endif // MBED_PCAL955x
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