Atmel Software Framework

pwm.h File Reference

PWM service for XMEGA.

Copyright (c) 2012-2015 Atmel Corporation. All rights reserved.

#include "tc.h"

Data Structures

struct  pwm_config
 PWM configuration. More...
 

Typedefs

typedef void(* pwm_callback_t )(void)
 Interrupt callback type. More...
 

Enumerations

enum  pwm_channel_t {
  PWM_CH_A = 1,
  PWM_CH_B = 2,
  PWM_CH_C = 3,
  PWM_CH_D = 4
}
 PWM compare channel index. More...
 
enum  pwm_clk_sel {
  PWM_CLK_OFF = TC_CLKSEL_OFF_gc,
  PWM_CLK_DIV1 = TC_CLKSEL_DIV1_gc,
  PWM_CLK_DIV2 = TC_CLKSEL_DIV2_gc,
  PWM_CLK_DIV4 = TC_CLKSEL_DIV4_gc,
  PWM_CLK_DIV8 = TC_CLKSEL_DIV8_gc,
  PWM_CLK_DIV64 = TC_CLKSEL_DIV64_gc,
  PWM_CLK_DIV256 = TC_CLKSEL_DIV256_gc,
  PWM_CLK_DIV1024 = TC_CLKSEL_DIV1024_gc
}
 Valid clock source indexes. More...
 
enum  pwm_tc_t {
  PWM_TCC0,
  PWM_TCC1,
  PWM_TCD0,
  PWM_TCD1,
  PWM_TCE0,
  PWM_TCE1,
  PWM_TCF0,
  PWM_TCF1
}
 Valid timer/counters to use. More...
 

Functions

static void pwm_disable (struct pwm_config *config)
 Disable the PWM timer. More...
 
void pwm_init (struct pwm_config *config, enum pwm_tc_t tc, enum pwm_channel_t channel, uint16_t freq_hz)
 Initialize PWM configuration struct and set correct I/O pin to output. More...
 
static void pwm_overflow_int_callback (struct pwm_config *config, pwm_callback_t callback)
 Callback function for timer overflow interrupts. More...
 
static void pwm_set_duty_cycle_percent (struct pwm_config *config, uint8_t duty_cycle_scale)
 Function to set PWM duty cycle. More...
 
void pwm_set_frequency (struct pwm_config *config, uint16_t freq_hz)
 Calculate TC settings from PWM frequency. More...
 
void pwm_start (struct pwm_config *config, uint8_t duty_cycle_scale)
 Start a PWM channel. More...
 
static void pwm_stop (struct pwm_config *config)
 Function that stops the PWM timer. More...
 
static void pwm_timer_reset (struct pwm_config *config)
 Function that resets the PWM timer. More...