Darien Figueroa
repo time
Dependencies: mbed MAX14720 MAX30205 USBDevice
main.cpp@20:6d2af70c92ab, 2021-04-06 (annotated)
- Committer:
- darienf
- Date:
- Tue Apr 06 06:41:40 2021 +0000
- Revision:
- 20:6d2af70c92ab
- Parent:
- 18:b64938c813dc
another repo
Who changed what in which revision?
| User | Revision | Line number | New 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 | 17:9a467f9a0579 | 21 | // Assign turnOff function to falling edge of button |
| switches | 14:4c4094890fde | 22 | button.fall(&turnOff); |
| switches | 17:9a467f9a0579 | 23 | |
| switches | 17:9a467f9a0579 | 24 | // Turn LED signal on to make buck-boost output visible |
| switches | 14:4c4094890fde | 25 | led = 0; |
| switches | 17:9a467f9a0579 | 26 | |
| switches | 17:9a467f9a0579 | 27 | // Override the default value of boostEn to BOOST_ENABLED |
| switches | 14:4c4094890fde | 28 | max14720.boostEn = MAX14720::BOOST_ENABLED; |
| switches | 17:9a467f9a0579 | 29 | // Note that writing the local value does directly affect the part |
| switches | 17:9a467f9a0579 | 30 | // The buck-boost regulator will remain off until init is called |
| switches | 17:9a467f9a0579 | 31 | |
| switches | 17:9a467f9a0579 | 32 | // Call init to apply all settings to the PMIC |
| switches | 18:b64938c813dc | 33 | if (max14720.init() == MAX14720_ERROR) { |
| switches | 18:b64938c813dc | 34 | printf("Error initializing MAX14720"); |
| switches | 18:b64938c813dc | 35 | } |
| switches | 17:9a467f9a0579 | 36 | |
| switches | 17:9a467f9a0579 | 37 | // Wait 1 second to see the buck-boost regulator turn on |
| switches | 14:4c4094890fde | 38 | wait(1); |
| switches | 17:9a467f9a0579 | 39 | |
| dan | 0:7dec7e9ac085 | 40 | while(1) { |
| switches | 17:9a467f9a0579 | 41 | // Turn off the buck-boost regulators |
| switches | 14:4c4094890fde | 42 | max14720.boostSetMode(MAX14720::BOOST_DISABLED); |
| switches | 17:9a467f9a0579 | 43 | wait(0.5); |
| switches | 17:9a467f9a0579 | 44 | |
| switches | 17:9a467f9a0579 | 45 | // Change the voltage of the buck-boost regulator and enable it |
| switches | 17:9a467f9a0579 | 46 | max14720.boostSetVoltage(2500); |
| switches | 17:9a467f9a0579 | 47 | max14720.boostSetMode(MAX14720::BOOST_ENABLED); |
| switches | 14:4c4094890fde | 48 | wait(0.5); |
| switches | 17:9a467f9a0579 | 49 | |
| switches | 17:9a467f9a0579 | 50 | // Change the voltage of the buck-boost regulator |
| switches | 18:b64938c813dc | 51 | // Note that the MAX14720 cannot change the buck-boost voltage while |
| switches | 17:9a467f9a0579 | 52 | // it is enabled so if boostEn is set to BOOST_ENABLED, this |
| switches | 17:9a467f9a0579 | 53 | // function will disable it, change the voltage, and re-enable it. |
| switches | 14:4c4094890fde | 54 | max14720.boostSetVoltage(5000); |
| switches | 14:4c4094890fde | 55 | wait(0.5); |
| stevep | 4:81cea7a352b0 | 56 | } |
| dan | 0:7dec7e9ac085 | 57 | } |