pwm_input_arch.c File Reference

handling of smt32 PWM input using a timer with capture. More...

#include "mcu_periph/pwm_input.h"
#include <BOARD_CONFIG>
#include "generated/airframe.h"
#include <libopencm3/stm32/rcc.h>
#include <libopencm3/stm32/gpio.h>
#include <libopencm3/stm32/timer.h>
#include <libopencm3/cm3/nvic.h>
#include "mcu_periph/sys_time.h"
#include "mcu_periph/gpio.h"
#include "mcu_arch.h"

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Macros
#define	ONE_MHZ_CLK   1000000
#define	PWM_INPUT_IRQ_PRIO   2

Functions
static void	pwm_input_set_timer (uint32_t tim, uint32_t ticks_per_usec)
void	pwm_input_init (void)
uint32_t	get_pwm_input_duty_in_usec (uint32_t channel)
uint32_t	get_pwm_input_period_in_usec (uint32_t channel)

Variables
static const uint32_t	pwm_input_ticks_per_usec []

Detailed Description

handling of smt32 PWM input using a timer with capture.

Definition in file pwm_input_arch.c.

Macro Definition Documentation

#define ONE_MHZ_CLK   1000000

Definition at line 44 of file pwm_input_arch.c.

Referenced by pwm_input_set_timer().

#define PWM_INPUT_IRQ_PRIO   2

Definition at line 48 of file pwm_input_arch.c.

Referenced by pwm_input_init().

Function Documentation

uint32_t get_pwm_input_duty_in_usec

(

uint32_t

channel

)

Definition at line 189 of file pwm_input_arch.c.

References channel, pwm_input_duty_tics, and pwm_input_ticks_per_usec.

uint32_t get_pwm_input_period_in_usec

(

uint32_t

channel

)

Definition at line 193 of file pwm_input_arch.c.

References channel, pwm_input_period_tics, and pwm_input_ticks_per_usec.

void pwm_input_init

(

void

)

Configure timers

• timer clock enable
• base configuration
• enable counter

Definition at line 66 of file pwm_input_arch.c.

References FALSE, gpio_setup_pin_af(), PWM_INPUT1_CC_IE, PWM_INPUT1_CHANNEL_DUTY, PWM_INPUT1_CHANNEL_PERIOD, PWM_INPUT1_GPIO_AF, PWM_INPUT1_GPIO_PIN, PWM_INPUT1_GPIO_PORT, PWM_INPUT1_IRQ, PWM_INPUT1_IRQ2, PWM_INPUT1_SLAVE_TRIG, PWM_INPUT1_TIMER, PWM_INPUT1_TIMER_INPUT, PWM_INPUT2_CC_IE, PWM_INPUT2_CHANNEL_DUTY, PWM_INPUT2_CHANNEL_PERIOD, PWM_INPUT2_GPIO_AF, PWM_INPUT2_GPIO_PIN, PWM_INPUT2_GPIO_PORT, PWM_INPUT2_IRQ, PWM_INPUT2_SLAVE_TRIG, PWM_INPUT2_TIMER, PWM_INPUT2_TIMER_INPUT, pwm_input_duty_tics, pwm_input_duty_valid, PWM_INPUT_IRQ_PRIO, PWM_INPUT_NB, pwm_input_period_tics, pwm_input_period_valid, and pwm_input_set_timer().

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static void pwm_input_set_timer ( uint32_t  tim, uint32_t  ticks_per_usec  )

inlinestatic

Definition at line 56 of file pwm_input_arch.c.

References ONE_MHZ_CLK, and timer_get_frequency().

Referenced by pwm_input_init().

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Variable Documentation

const uint32_t pwm_input_ticks_per_usec[]

static

Initial value:

= {
  PWM_INPUT1_TICKS_PER_USEC,
  PWM_INPUT2_TICKS_PER_USEC
}

Definition at line 51 of file pwm_input_arch.c.

Referenced by get_pwm_input_duty_in_usec(), and get_pwm_input_period_in_usec().