Diff: max7219.cpp

Revision:

0:798fb343e022

Child:

1:90a7cf4e7d26

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/max7219.cpp	Tue Jan 12 23:40:36 2016 +0000
@@ -0,0 +1,552 @@
+/******************************************************************//**
+* @file max7219.cpp
+*
+* @author Justin Jordan
+*
+* @version 0.0
+*
+* Started: 08JAN16
+*
+* Updated: 
+*
+* @brief Source file for Max7219 class
+***********************************************************************
+* Copyright (C) 2016 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 "max7219.h"
+
+
+//*********************************************************************
+Max7219::Max7219(SPI *spi_bus, PinName cs): _p_spi(spi_bus)
+{
+    _num_devices = 1;
+    
+    _p_cs = new DigitalOut(cs, 1);
+    _spi_owner = false;
+}
+
+
+//*********************************************************************
+Max7219::Max7219(PinName mosi, PinName miso, PinName sclk, PinName cs)
+{
+    _num_devices = 1;
+    
+    _p_spi = new SPI(mosi, miso, sclk);
+    _p_cs = new DigitalOut(cs, 1);
+    
+    _spi_owner = true;
+}
+
+
+//*********************************************************************
+Max7219::~Max7219()
+{
+    delete _p_cs;
+    
+    if(_spi_owner) 
+    {
+        delete _p_spi;
+    }
+}
+
+
+//*********************************************************************
+int32_t Max7219::set_num_devices(uint8_t num_devices)
+{
+    int32_t rtn_val = -1;
+    
+    if(num_devices > 0)
+    {
+        _num_devices = num_devices;
+        rtn_val = _num_devices;
+    }
+    
+    return(rtn_val);
+}
+
+
+//*********************************************************************
+void Max7219::set_display_test(void)
+{
+    uint8_t idx = 0;
+    
+    _p_cs->write(0); 
+    for(idx = 0; idx < _num_devices; idx++)
+    {
+        _p_spi->write(MAX7219_DISPLAY_TEST);
+        _p_spi->write(1);
+    }
+    _p_cs->write(1); 
+}
+
+
+//*********************************************************************
+void Max7219::clear_display_test(void)
+{
+    uint8_t idx = 0;
+    
+    _p_cs->write(0); 
+    for(idx = 0; idx < _num_devices; idx++)
+    {
+        _p_spi->write(MAX7219_DISPLAY_TEST);
+        _p_spi->write(0);
+    }
+    _p_cs->write(1); 
+}
+
+
+//*********************************************************************
+int32_t Max7219::init_device(max7219_configuration_t config, uint8_t device_number)
+{
+    int32_t rtn_val = -1;
+    uint8_t idx = 0;
+    
+    if(config.device_number > _num_devices)
+    {
+        rtn_val = -1;
+    }
+    else if(config.device_number == 0)
+    {
+        //device numbering starts with index 1
+        rtn_val = -2;
+    }
+    else
+    {
+        //write DECODE_MODE register of device
+        _p_cs->write(0); 
+        for(idx = _num_devices; idx > 0; idx--)
+        {
+            if(config.device_number == idx)
+            {
+                _p_spi->write(MAX7219_DECODE_MODE);
+                _p_spi->write(config.decode_mode);
+            }
+            else
+            {
+                _p_spi->write(MAX7219_NO_OP);
+                _p_spi->write(0);
+            }
+        }
+        _p_cs->write(1); 
+        
+        wait_us(1);
+        
+        //write INTENSITY register of device
+        _p_cs->write(0); 
+        for(idx = _num_devices; idx > 0; idx--)
+        {
+            if(config.device_number == idx)
+            {
+                _p_spi->write(MAX7219_INTENSITY);
+                _p_spi->write(config.intensity);
+            }
+            else
+            {
+                _p_spi->write(MAX7219_NO_OP);
+                _p_spi->write(0);
+            }
+        }
+        _p_cs->write(1); 
+        
+        wait_us(1);
+        
+        //write SCAN_LIMT register of device
+        _p_cs->write(0); 
+        for(idx = _num_devices; idx > 0; idx--)
+        {
+            if(config.device_number == idx)
+            {
+                _p_spi->write(MAX7219_SCAN_LIMIT);
+                _p_spi->write(config.scan_limit);
+            }
+            else
+            {
+                _p_spi->write(MAX7219_NO_OP);
+                _p_spi->write(0);
+            }
+        }
+        _p_cs->write(1); 
+        
+        wait_us(1);
+        
+        rtn_val = 0;
+    }
+    
+    return(rtn_val);
+}
+
+
+//*********************************************************************
+void Max7219::init_display(max7219_configuration_t config)
+{
+    uint8_t idx = 0;
+    
+    //write DECODE_MODE register of all devices
+    _p_cs->write(0); 
+    for(idx = 0; idx < _num_devices; idx++)
+    {
+        _p_spi->write(MAX7219_DECODE_MODE);
+        _p_spi->write(config.decode_mode);
+    }
+    _p_cs->write(1); 
+    
+    wait_us(1);
+    
+    //write INTENSITY register of all devices
+    _p_cs->write(0); 
+    for(idx = 0; idx < _num_devices; idx++)
+    {
+        _p_spi->write(MAX7219_INTENSITY);
+        _p_spi->write(config.intensity);
+    }
+    _p_cs->write(1); 
+    
+    wait_us(1);
+    
+    //write SCAN_LIMT register of all devices
+    _p_cs->write(0); 
+    for(idx = 0; idx < _num_devices; idx++)
+    {
+        _p_spi->write(MAX7219_SCAN_LIMIT);
+        _p_spi->write(config.scan_limit);
+    }
+    _p_cs->write(1); 
+    
+    wait_us(1);
+}
+
+
+//*********************************************************************
+int32_t Max7219::enable_device(uint8_t device_number)
+{
+    int32_t rtn_val = -1;
+    uint8_t idx = 0;
+    
+    if(device_number > _num_devices)
+    {
+        rtn_val = -1;
+    }
+    else if(device_number == 0)
+    {
+        //device numbering starts with index 1
+        rtn_val = -2;
+    }
+    else
+    {
+        _p_cs->write(0); 
+        for(idx = _num_devices; idx > 0; idx--)
+        {
+            if(device_number == idx)
+            {
+                _p_spi->write(MAX7219_SHUTDOWN);
+                _p_spi->write(1);
+            }
+            else
+            {
+                _p_spi->write(MAX7219_NO_OP);
+                _p_spi->write(0);
+            }
+        }
+        _p_cs->write(1); 
+        
+        rtn_val = 0;
+    }
+    
+    return(rtn_val);
+}
+
+
+//*********************************************************************
+void Max7219::enable_display(void)
+{
+    uint8_t idx = 0;
+    
+    _p_cs->write(0); 
+    for(idx = 0; idx < _num_devices; idx++)
+    {
+        _p_spi->write(MAX7219_SHUTDOWN);
+        _p_spi->write(1);
+    }
+    _p_cs->write(1); 
+}
+    
+
+//*********************************************************************    
+int32_t Max7219::disable_device(uint8_t device_number)
+{
+    int32_t rtn_val = -1;
+    uint8_t idx = 0;
+    
+    if(device_number > _num_devices)
+    {
+        rtn_val = -1;
+    }
+    else if(device_number == 0)
+    {
+        //device numbering starts with index 1
+        rtn_val = -2;
+    }
+    else
+    {
+        _p_cs->write(0); 
+        for(idx = _num_devices; idx > 0; idx--)
+        {
+            if(device_number == idx)
+            {
+                _p_spi->write(MAX7219_SHUTDOWN);
+                _p_spi->write(0);
+            }
+            else
+            {
+                _p_spi->write(MAX7219_NO_OP);
+                _p_spi->write(0);
+            }
+        }
+        _p_cs->write(1); 
+        
+        rtn_val = 0;
+    }
+    
+    return(rtn_val);
+}
+
+
+//*********************************************************************    
+void Max7219::disable_display(void)
+{
+    uint8_t idx = 0;
+    
+    _p_cs->write(0); 
+    for(idx = 0; idx < _num_devices; idx++)
+    {
+        _p_spi->write(MAX7219_SHUTDOWN);
+        _p_spi->write(0);
+    }
+    _p_cs->write(1); 
+}
+
+
+
+//********************************************************************* 
+int32_t Max7219::write_digit(uint8_t device_number, uint8_t digit, uint8_t data)
+{
+    int32_t rtn_val = -1;
+    uint8_t idx = 0;
+    
+    if(digit > MAX7219_DIGIT_7)
+    {
+        rtn_val = -3;
+    }
+    else if(digit < MAX7219_DIGIT_0)
+    {
+        rtn_val = -4;
+    }
+    else
+    {
+        if(device_number > _num_devices)
+        {
+            rtn_val = -1;
+        }
+        else if(device_number == 0)
+        {
+            rtn_val = -2;
+        }
+        else
+        {
+            _p_cs->write(0); 
+            for(idx = _num_devices; idx > 0; idx--)
+            {
+                if(idx == device_number)
+                {
+                    _p_spi->write(digit);
+                    _p_spi->write(data);
+                }
+                else
+                {
+                    _p_spi->write(MAX7219_NO_OP);
+                    _p_spi->write(0);
+                }
+            }
+            _p_cs->write(1); 
+            
+            rtn_val = 0;
+        }
+    }
+    
+    return(rtn_val);
+}
+    
+
+//*********************************************************************     
+int32_t Max7219::clear_digit(uint8_t device_number, uint8_t digit)
+{
+    int32_t rtn_val = -1;
+    uint8_t idx = 0;
+    
+    if(digit > MAX7219_DIGIT_7)
+    {
+        rtn_val = -3;
+    }
+    else if(digit < MAX7219_DIGIT_0)
+    {
+        rtn_val = -4;
+    }
+    else
+    {
+        if(device_number > _num_devices)
+        {
+            rtn_val = -1;
+        }
+        else if(device_number == 0)
+        {
+            rtn_val = -2;
+        }
+        else
+        {
+            _p_cs->write(0); 
+            for(idx = _num_devices; idx > 0; idx--)
+            {
+                if(idx == device_number)
+                {
+                    _p_spi->write(digit);
+                    _p_spi->write(0);
+                }
+                else
+                {
+                    _p_spi->write(MAX7219_NO_OP);
+                    _p_spi->write(0);
+                }
+            }
+            _p_cs->write(1); 
+            
+            rtn_val = 0;
+        }
+    }
+    
+    return(rtn_val);
+}
+
+
+//********************************************************************* 
+int32_t Max7219::device_all_on(uint8_t device_number)
+{
+    int32_t rtn_val = -1;
+    uint8_t idx = 0;
+    
+    if(device_number > _num_devices)
+    {
+        rtn_val = -1;
+    }
+    else if(device_number == 0)
+    {
+        rtn_val = -2;
+    }
+    else
+    {
+        rtn_val = 0;
+        
+        //writes every digit of given device to 0xFF
+        for(idx = 0; idx < 8; idx++)
+        {
+            if(rtn_val == 0)
+            {
+                rtn_val = write_digit(device_number, (idx + 1), 0xFF);
+            }
+        }
+    }
+    
+    return(rtn_val);
+}
+
+
+//********************************************************************* 
+int32_t Max7219::device_all_off(uint8_t device_number)
+{
+    int32_t rtn_val = -1;
+    uint8_t idx = 0;
+    
+    if(device_number > _num_devices)
+    {
+        rtn_val = -1;
+    }
+    else if(device_number == 0)
+    {
+        rtn_val = -2;
+    }
+    else
+    {
+        rtn_val = 0;
+        
+        //writes every digit of given device to 0
+        for(idx = 0; idx < 8; idx++)
+        {
+            if(rtn_val == 0)
+            {
+                rtn_val = write_digit(device_number, (idx + 1), 0);
+            }
+        }
+    }
+    
+    return(rtn_val);
+}
+
+
+void Max7219::display_all_on(void)
+{
+    uint8_t idx, idy;
+    
+    //writes every digit of every device to 0xFF
+    for(idx = 0; idx < _num_devices; idx++)
+    {
+        for(idy = 0; idy < MAX7219_DIGIT_7; idy++)
+        {
+            write_digit((idx + 1), (idy + 1), 0xFF);
+        }
+    }
+}
+    
+    
+void Max7219::display_all_off(void)
+{
+    uint8_t idx, idy;
+    
+    //writes every digit of every device to 0
+    for(idx = 0; idx < _num_devices; idx++)
+    {
+        for(idy = 0; idy < MAX7219_DIGIT_7; idy++)
+        {
+            write_digit((idx + 1), (idy + 1), 0);
+        }
+    }
+}
+