Module atmega32u4_hal::timer

Timers

PWM

atmega32u4_hal currently only implements timers for PWM. Different uses might get added later on. To configure a timer for PWM, create a new corresponding Timer#Pwm object:

let dp = atmega32u4::Peripherals::take().unwrap();
let mut pwm4 = atmega32u4_hal::timer::Timer4Pwm::new(dp.TIMER4);

Next up, convert your pin into a PWM output. You can only configure PWM for pins already configured as outputs:

let mut pin = portc.pc7.into_output(&mut portc.ddr).into_pwm(&mut pwm4);

Pins supporting PWM

Only the following pins support PWM:

Timer	Channel	Port	Pin
atmega32u4::TIMER0	OC0A	atmega32u4::PORTB	PB7
atmega32u4::TIMER0	OC0B	atmega32u4::PORTD	PD0
atmega32u4::TIMER1	OC1A	atmega32u4::PORTB	PB5
atmega32u4::TIMER1	OC1B	atmega32u4::PORTB	PB6
atmega32u4::TIMER1	OC1C	atmega32u4::PORTB	PB7
atmega32u4::TIMER3	OC3A	atmega32u4::PORTC	PC6
atmega32u4::TIMER4	OC4A	atmega32u4::PORTC	PC7
atmega32u4::TIMER4	OC4B	atmega32u4::PORTC	PB6
atmega32u4::TIMER4	OC4D	atmega32u4::PORTD	PD7

Example

let dp = atmega32u4::Peripherals::take().unwrap();

// According to the manual, PC7(D13) is connected to Timer/Counter4
let mut pwm4 = atmega32u4_hal::timer::Timer4Pwm::new(dp.TIMER4);

// Split portc into 8 pins
let mut portc = dp.PORTC.split();

// First make the pin an output, then enable the PWM timer
let mut pin = portc.pc7.into_output(&mut portc.ddr).into_pwm(&mut pwm4);

// Set a duty cycle
pin.set_duty(pin.get_max_duty() / 2);

Structs

Timer0Pwm	PWM Timer
Timer1Pwm	PWM Timer
Timer3Pwm	PWM Timer
Timer4Pwm	PWM Timer