main.cpp

00001 #include "mbed.h"
00002 #include "MAX14720.h"
00003 
00004 // I2C Master 2
00005 I2C i2c2(I2C2_SDA, I2C2_SCL);
00006 
00007 #define  I2C_ADDR_PMIC   (0x54)
00008 MAX14720 max14720(&i2c2,I2C_ADDR_PMIC);
00009 
00010 DigitalOut led(LED1);
00011 InterruptIn button(SW1);
00012 
00013 void turnOff()
00014 {
00015     // Write the power down command to the PMIC
00016     max14720.shutdown();
00017 }
00018 
00019 int main()
00020 {
00021     // Assign turnOff function to falling edge of button
00022     button.fall(&turnOff);
00023 
00024     // Turn LED signal on to make buck-boost output visible
00025     led = 0;
00026 
00027     // Override the default value of boostEn to BOOST_ENABLED
00028     max14720.boostEn = MAX14720::BOOST_ENABLED;
00029     // Note that writing the local value does directly affect the part
00030     // The buck-boost regulator will remain off until init is called
00031 
00032     // Call init to apply all settings to the PMIC
00033     if (max14720.init() == MAX14720_ERROR) {
00034         printf("Error initializing MAX14720");
00035     }
00036 
00037     // Wait 1 second to see the buck-boost regulator turn on
00038     wait(1);
00039 
00040     while(1) {
00041         // Turn off the buck-boost regulators
00042         max14720.boostSetMode(MAX14720::BOOST_DISABLED);
00043         wait(0.5);
00044 
00045         // Change the voltage of the buck-boost regulator and enable it
00046         max14720.boostSetVoltage(2500);
00047         max14720.boostSetMode(MAX14720::BOOST_ENABLED);
00048         wait(0.5);
00049 
00050         // Change the voltage of the buck-boost regulator
00051         // Note that the MAX14720 cannot change the buck-boost voltage while
00052         // it is enabled so if boostEn is set to BOOST_ENABLED, this
00053         // function will disable it, change the voltage, and re-enable it.
00054         max14720.boostSetVoltage(5000);
00055         wait(0.5);
00056     }
00057 }