Maxim Integrated / Mbed 2 deprecated HSP_PMIC_Demo

Program to demonstrate how to configure the PMIC on the MAX32620HSP (MAXREFDES100#)

Dependencies:   MAX14720 mbed

Fork of HSP_PMIC_Demo by Greg Steiert

main.cpp@17:9a467f9a0579, 2016-10-06 (annotated)

Committer:
switches
Date:
Thu Oct 06 17:11:37 2016 +0000
Revision:
17:9a467f9a0579
Parent:
14:4c4094890fde
Child:
18:b64938c813dc
Added comments to explain the code

Who changed what in which revision?

UserRevisionLine numberNew contents of line
dan 0:7dec7e9ac085 1 #include "mbed.h"
switches 14:4c4094890fde 2 #include "MAX14720.h"
switches 14:4c4094890fde 3
switches 14:4c4094890fde 4 // I2C Master 2
switches 14:4c4094890fde 5 I2C i2c2(I2C2_SDA, I2C2_SCL);
dan 0:7dec7e9ac085 6
switches 14:4c4094890fde 7 #define I2C_ADDR_PMIC (0x54)
switches 14:4c4094890fde 8 MAX14720 max14720(&i2c2,I2C_ADDR_PMIC);
switches 14:4c4094890fde 9
switches 14:4c4094890fde 10 DigitalOut led(LED1);
switches 14:4c4094890fde 11 InterruptIn button(SW1);
switches 14:4c4094890fde 12
switches 14:4c4094890fde 13 void turnOff()
switches 14:4c4094890fde 14 {
switches 17:9a467f9a0579 15 // Write the power down command to the PMIC
switches 14:4c4094890fde 16 max14720.shutdown();
switches 14:4c4094890fde 17 }
dan 0:7dec7e9ac085 18
switches 14:4c4094890fde 19 int main()
switches 14:4c4094890fde 20 {
switches 14:4c4094890fde 21 int result;
switches 17:9a467f9a0579 22
switches 17:9a467f9a0579 23 // Assign turnOff function to falling edge of button
switches 14:4c4094890fde 24 button.fall(&turnOff);
switches 17:9a467f9a0579 25
switches 17:9a467f9a0579 26 // Turn LED signal on to make buck-boost output visible
switches 14:4c4094890fde 27 led = 0;
switches 17:9a467f9a0579 28
switches 17:9a467f9a0579 29 // Override the default value of boostEn to BOOST_ENABLED
switches 14:4c4094890fde 30 max14720.boostEn = MAX14720::BOOST_ENABLED;
switches 17:9a467f9a0579 31 // Note that writing the local value does directly affect the part
switches 17:9a467f9a0579 32 // The buck-boost regulator will remain off until init is called
switches 17:9a467f9a0579 33
switches 17:9a467f9a0579 34 // Call init to apply all settings to the PMIC
switches 14:4c4094890fde 35 result = max14720.init();
switches 14:4c4094890fde 36 if (result == MAX14720_ERROR) printf("Error initializing MAX14720");
switches 17:9a467f9a0579 37
switches 17:9a467f9a0579 38 // Wait 1 second to see the buck-boost regulator turn on
switches 14:4c4094890fde 39 wait(1);
switches 17:9a467f9a0579 40
dan 0:7dec7e9ac085 41 while(1) {
switches 17:9a467f9a0579 42 // Turn off the buck-boost regulators
switches 14:4c4094890fde 43 max14720.boostSetMode(MAX14720::BOOST_DISABLED);
switches 17:9a467f9a0579 44 wait(0.5);
switches 17:9a467f9a0579 45
switches 17:9a467f9a0579 46 // Change the voltage of the buck-boost regulator and enable it
switches 17:9a467f9a0579 47 max14720.boostSetVoltage(2500);
switches 17:9a467f9a0579 48 max14720.boostSetMode(MAX14720::BOOST_ENABLED);
switches 14:4c4094890fde 49 wait(0.5);
switches 17:9a467f9a0579 50
switches 17:9a467f9a0579 51 // Change the voltage of the buck-boost regulator
switches 17:9a467f9a0579 52 // Note that the MAX14720 cannot change the buck-boost voltage while
switches 17:9a467f9a0579 53 // it is enabled so if boostEn is set to BOOST_ENABLED, this
switches 17:9a467f9a0579 54 // function will disable it, change the voltage, and re-enable it.
switches 14:4c4094890fde 55 max14720.boostSetVoltage(5000);
switches 14:4c4094890fde 56 wait(0.5);
stevep 4:81cea7a352b0 57 }
dan 0:7dec7e9ac085 58 }