main.cpp

00001 /**********************************************************************
00002 * Copyright (C) 2017 Maxim Integrated Products, Inc., All Rights Reserved.
00003 *
00004 * Permission is hereby granted, free of charge, to any person obtaining a
00005 * copy of this software and associated documentation files (the "Software"),
00006 * to deal in the Software without restriction, including without limitation
00007 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
00008 * and/or sell copies of the Software, and to permit persons to whom the
00009 * Software is furnished to do so, subject to the following conditions:
00010 *
00011 * The above copyright notice and this permission notice shall be included
00012 * in all copies or substantial portions of the Software.
00013 *
00014 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
00015 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
00016 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
00017 * IN NO EVENT SHALL MAXIM INTEGRATED BE LIABLE FOR ANY CLAIM, DAMAGES
00018 * OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
00019 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
00020 * OTHER DEALINGS IN THE SOFTWARE.
00021 *
00022 * Except as contained in this notice, the name of Maxim Integrated
00023 * Products, Inc. shall not be used except as stated in the Maxim Integrated
00024 * Products, Inc. Branding Policy.
00025 *
00026 * The mere transfer of this software does not imply any licenses
00027 * of trade secrets, proprietary technology, copyrights, patents,
00028 * trademarks, maskwork rights, or any other form of intellectual
00029 * property whatsoever. Maxim Integrated Products, Inc. retains all
00030 * ownership rights.
00031 **********************************************************************/
00032 
00033 
00034 #include "mbed.h"
00035 #include "max77801.h"
00036 #include "USBSerial.h"
00037 
00038 // Virtual serial port over USB
00039 USBSerial microUSB; 
00040 
00041 int main()
00042 {
00043     int c;    
00044     int32_t rData;
00045     double vout_l = 3.3000;
00046     double vout_h = 3.7500;
00047     
00048     DigitalOut rLED(LED1, LED_OFF);
00049     DigitalOut gLED(LED2, LED_OFF);
00050     DigitalOut bLED(LED3, LED_OFF);
00051     
00052     I2C i2cBus(P5_7, P6_0);
00053     i2cBus.frequency(400000);
00054     
00055     MAX77801 max77801(&i2cBus);
00056     wait_ms(100);    
00057     
00058     rData = max77801.init();
00059     if(rData<0)
00060     {
00061         microUSB.printf("MAX77801 Fail to Init. Stopped\r\n");        
00062         rLED = true;
00063     }
00064     else
00065     {
00066         microUSB.printf("MAX77801 Init Done\r\n");
00067     }
00068   
00069     while(1)
00070     {        
00071         gLED = true;rLED = false;
00072         microUSB.printf("----- [ MAX77801 DEMO ] Usage -----  \r\n");  
00073         microUSB.printf("i : Set Registers to POR Staus \r\n");  
00074         microUSB.printf("+ : Increase VOUT L&H \r\n");  
00075         microUSB.printf("- : Dncrease VOUT L&H \r\n");  
00076         microUSB.printf("s : Read Status Registser \r\n");  
00077         microUSB.printf("e : Enable Buck Boost \r\n");  
00078         microUSB.printf("d : Disable Buck Boost \r\n"); 
00079         microUSB.printf("\r\nInput >> ");  
00080         
00081         c = microUSB.getc();
00082         
00083         gLED = false;rLED = true;
00084         switch(c)
00085         {
00086             // ReInit
00087             case 'i': 
00088                 microUSB.printf("Init to POR Status\r\n");   
00089                 //Set to POR Status
00090                 max77801.init();
00091                 vout_l = 3.3000;
00092                 rData = max77801.write_register(MAX77801::REG_VOUT_DVS_L, 0x38);
00093                 if(rData < 0)                    
00094                     microUSB.printf("Error: to access data\r\n");  
00095                 vout_h = 3.7500; //WLP
00096                 rData = max77801.write_register(MAX77801::REG_VOUT_DVS_H, 0x40);
00097                 if(rData < 0)                    
00098                     microUSB.printf("Error: to access data\r\n"); 
00099             break;
00100             
00101             //Control VOUT
00102             case '+':
00103                 microUSB.printf("Increase VOUT\r\n");   
00104                 vout_l += 0.0125;
00105                 rData = max77801.set_vout(vout_l, MAX77801::VAL_LOW); 
00106                 if(rData < 0)                    
00107                     microUSB.printf("Error: to access data\r\n");  
00108                 vout_h += 0.0125;
00109                 rData = max77801.set_vout(vout_h, MAX77801::VAL_HIGH);
00110                 if(rData < 0)                    
00111                     microUSB.printf("Error: to access data\r\n");                  
00112             break;
00113             
00114             case '-':
00115                 microUSB.printf("Decrease VOUT\r\n");    
00116                 vout_l -= 0.0125;
00117                 rData = max77801.set_vout(vout_l, MAX77801::VAL_LOW); 
00118                 if(rData < 0)                    
00119                     microUSB.printf("Error: to access data\r\n");  
00120                 vout_h -= 0.0125;
00121                 rData = max77801.set_vout(vout_h, MAX77801::VAL_HIGH);
00122                 if(rData < 0)                    
00123                     microUSB.printf("Error: to access data\r\n");                  
00124             break;
00125             
00126             //Read Status Register
00127             case 's':
00128                 microUSB.printf("Read Status\r\n");  
00129                 rData = max77801.get_status(); 
00130                 if(rData < 0)                    
00131                     microUSB.printf("Error: to access data\r\n");  
00132                 else                
00133                     microUSB.printf("Status 0x%2X\r\n",rData); 
00134             break;
00135             
00136             //Buck Boost Enable/Disable            
00137             case 'e':
00138                 microUSB.printf("Enable Buck Boost\r\n");  
00139                 rData = max77801.config_enable(MAX77801::BUCK_BOOST_OUTPUT, 
00140                                                MAX77801::VAL_ENABLE); 
00141                 if(rData < 0)                    
00142                     microUSB.printf("Error: to access data\r\n");  
00143             break;
00144             
00145             case 'd':
00146                 microUSB.printf("Disable Buck Boost\r\n");  
00147                 rData = max77801.config_enable(MAX77801::BUCK_BOOST_OUTPUT, 
00148                                                MAX77801::VAL_DISABLE); 
00149                 if(rData < 0)                    
00150                     microUSB.printf("Error: to access data\r\n");  
00151             break;
00152             
00153             
00154             default:                
00155                 microUSB.printf("Unknown Command\r\n");
00156             break;            
00157         }
00158         
00159         wait_ms(1000);
00160     }
00161 }