Diff: max7300.cpp

Revision:

0:350a850a7191

Child:

1:e1ee2549a047

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/max7300.cpp	Wed Jul 15 15:10:04 2015 +0000
@@ -0,0 +1,267 @@
+/******************************************************************//**
+* @file max7300.h
+*
+* @author Justin Jordan
+*
+* @version 0.0
+*
+* Started: 14JUL15
+*
+* Updated: 
+*
+* @brief Source file for Max7300 class
+***********************************************************************
+* Copyright (C) 2015 Maxim Integrated Products, Inc., All Rights Reserved.
+*
+* Permission is hereby granted, free of charge, to any person obtaining a
+* copy of this software and associated documentation files (the "Software"),
+* to deal in the Software without restriction, including without limitation
+* the rights to use, copy, modify, merge, publish, distribute, sublicense,
+* and/or sell copies of the Software, and to permit persons to whom the
+* Software is furnished to do so, subject to the following conditions:
+*
+* The above copyright notice and this permission notice shall be included
+* in all copies or substantial portions of the Software.
+*
+* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+* IN NO EVENT SHALL MAXIM INTEGRATED BE LIABLE FOR ANY CLAIM, DAMAGES
+* OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+* OTHER DEALINGS IN THE SOFTWARE.
+*
+* Except as contained in this notice, the name of Maxim Integrated
+* Products, Inc. shall not be used except as stated in the Maxim Integrated
+* Products, Inc. Branding Policy.
+*
+* The mere transfer of this software does not imply any licenses
+* of trade secrets, proprietary technology, copyrights, patents,
+* trademarks, maskwork rights, or any other form of intellectual
+* property whatsoever. Maxim Integrated Products, Inc. retains all
+* ownership rights.
+**********************************************************************/
+
+
+#include "max7300.h"
+
+
+//*********************************************************************
+Max7300::Max7300(I2C *i2c_bus, max7300_i2c_adrs_t i2c_adrs): _p_i2c(i2c_bus)
+{
+    _i2c_owner = false;
+    
+    _r_adrs = ((i2c_adrs << 1) | 1);
+    _w_adrs = (i2c_adrs << 1);
+}
+
+
+//*********************************************************************
+Max7300::Max7300(PinName sda, PinName scl, max7300_i2c_adrs_t i2c_adrs)
+{
+    _p_i2c = new I2C(sda, scl);
+    _i2c_owner = true;
+    
+    _r_adrs = ((i2c_adrs << 1) | 1);
+    _w_adrs = (i2c_adrs << 1);
+}
+
+
+//*********************************************************************
+Max7300::~Max7300()
+{
+    if(_i2c_owner) 
+    {
+        delete _p_i2c;
+    }
+}
+
+
+//*********************************************************************
+int16_t Max7300::enable_ports(void)
+{
+    int16_t result = -1;
+    char data[] = {MAX7300_CONFIGURATION, 0};
+    
+    //set internal register pointer to configuration register
+    result = _p_i2c->write(_w_adrs, data, 1, true);
+    if(!result)
+    {
+        //get current configuration register
+        result = _p_i2c->read(_w_adrs, (data +1 ), 1, true);
+        
+        if(!result)
+        {
+            //set 'S' bit
+            data[1] |= 0x01;
+            
+            //write back to device
+            result = result = _p_i2c->write(_w_adrs, data, 2, false);
+        } 
+    }
+
+    return result;
+}
+
+
+//*********************************************************************
+int16_t Max7300::disable_ports(void)
+{
+    int16_t result = -1;
+    char data[] = {MAX7300_CONFIGURATION, 0};
+    
+    //set internal register pointer to configuration register
+    result = _p_i2c->write(_w_adrs, data, 1, true);
+    if(!result)
+    {
+        //get current configuration register
+        result = _p_i2c->read(_w_adrs, (data +1 ), 1, true);
+        
+        if(!result)
+        {
+            //clear 'S' bit
+            data[1] &= ~0x01;
+            
+            //write back to device
+            result = result = _p_i2c->write(_w_adrs, data, 2, false);
+        } 
+    }
+
+    return result;
+}
+
+
+//*********************************************************************
+int16_t Max7300::config_port(max7300_port_number_t port_num, max7300_port_type_t port_type)
+{
+    int16_t result = -1;
+    char data[2];
+    
+    //get address of port configuration register 
+    data[0]  = ((port_num/4) + 8);
+    
+    //get port config bits offset in that register
+    uint8_t offset = (port_num % 4);
+    
+    //set internal register pointer to port configuration register
+    result = _p_i2c->write(_w_adrs, data, 1, true);
+    if(!result)
+    {
+        //get current port configuration register
+        result = _p_i2c->read(_w_adrs, (data +1 ), 1, true);
+        
+        if(!result)
+        {
+            //clear old port configuration
+            data[1] &= ~(0x03 << (offset*2));
+            //set port configuration bits
+            data[1] |= ((port_type & 0x03) << (offset*2));
+            
+            //write back to device
+            result = result = _p_i2c->write(_w_adrs, data, 2, false);
+        } 
+    }
+    
+    return result;
+}
+
+
+//*********************************************************************
+int16_t Max7300::config_ports(max7300_registers_t reg, uint8_t data)
+{
+    int16_t result = -1;
+    char local_data[] = {reg, data};
+    
+    //no need for read, modify, write.  
+    //Fx is intended to write whole register
+    result = _p_i2c->write(_w_adrs, local_data, 2, false);
+    
+    return result;
+}
+
+
+//*********************************************************************
+int16_t Max7300::read_port(max7300_port_number_t port_num)
+{
+    int16_t result = -1;
+    char data[2];
+    
+    data[0] = (port_num + 0x20);
+    
+    //set internal register pointer to port data register
+    result = _p_i2c->write(_w_adrs, data, 1, true);
+    if(!result)
+    {
+        //get port data
+        result = _p_i2c->read(_w_adrs, (data +1 ), 1, false);
+        if(!result)
+        {
+            result = data[1];
+        }
+        else
+        {
+            result = -1;
+        }
+    }
+     
+    return result;
+}
+
+
+//*********************************************************************
+int16_t Max7300::write_port(max7300_port_number_t port_num, uint8_t data)
+{
+    int16_t result = -1;
+    char local_data[] = {(port_num + 0x20), data};
+    
+    //no need for read, modify, write.  
+    //Fx is intended to write whole register
+    result = _p_i2c->write(_w_adrs, local_data, 2, false);
+    
+    return result;
+}
+
+
+//*********************************************************************
+int16_t Max7300::read_eight_ports(max7300_registers_t reg)
+{
+    int16_t result = -1;
+    char data[2];
+    
+    data[0] = reg;
+    
+    //set internal register pointer to port data register
+    result = _p_i2c->write(_w_adrs, data, 1, true);
+    if(!result)
+    {
+        //get port data
+        result = _p_i2c->read(_w_adrs, (data +1 ), 1, false);
+        if(!result)
+        {
+            result = data[1];
+        }
+        else
+        {
+            result = -1;
+        }
+    }
+     
+    return result;
+}
+
+
+//*********************************************************************
+int16_t Max7300::write_eight_ports(max7300_registers_t reg, uint8_t data)
+{
+    int16_t result = -1;
+    char local_data[] = {reg, data};
+    
+    //no need for read, modify, write.  
+    //Fx is intended to write whole register
+    result = _p_i2c->write(_w_adrs, local_data, 2, false);
+    
+    return result;
+}
+
+
+