PWM Driver¶
PWM Driver interface provides functionality to control frequency and duty of pulse-width modulation (PWM) signal.
To use this library
Header: #include "drv_pwm.h"
memake: MikroSDK.Driver
PWM driver controls underlying timer or dedicated hardware of a microcontroller to generate a PWM signal. User can configure signal frequency, duty cycle, output pin and channel.
Initialization¶
In order to initialize the PWM driver, user must call the pwm_open() function,
before any other. It is required to specify signal frequency and output pin.
Example initialization procedure is shown below:
pwm_t pwm;
pwm_config_t pwm_cfg;
pwm_configure_default( &pwm_cfg );
pwm_cfg.pin = PA11;
pwm_cfg.freq_hz = 1000;
pwm_open( &pwm, &pwm_cfg );
PWM control¶
The driver provides two functions: pwm_start() and pwm_stop() for enabling
and disabling PWM signal generation, respectively. To change duty cycle, user
can use the pwm_set_duty() function.
Example procedure of controlling a PWM signal:
pwm_set_freq( &pwm, pwm_cfg.freq_hz );
pwm_start( &pwm );
pwm_set_duty( &pwm, 0.5 ); // 50% duty