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stm32f0: stm32f1: buzzer: initial implementation

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S.J.R. van Schaik 2017-10-31 11:57:28 +01:00
parent 0fb4d67cce
commit 5730538c5f
3 changed files with 113 additions and 0 deletions
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13
include/buzzer.h Normal file
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#pragma once
#include <libopencm3/stm32/timer.h>
struct buzzer {
uint32_t timer;
enum tim_oc_id channel;
};
void buzzer_init(struct buzzer *buzzer);
void buzzer_enable(struct buzzer *buzzer);
void buzzer_disable(struct buzzer *buzzer);
void buzzer_set_freq(struct buzzer *buzzer, uint32_t freq);

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source/platform/stm32f0/buzzer.c Normal file
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#include <libopencm3/stm32/gpio.h>
#include <libopencm3/stm32/rcc.h>
#include <libopencm3/stm32/timer.h>
#include <buzzer.h>
#include <macros.h>
struct buzzer buzzers[] = {
{ TIM1, TIM_OC1 },
{ TIM2, TIM_OC2 },
{ TIM3, TIM_OC1 },
{ TIM14, TIM_OC1 },
};
size_t nbuzzers = count_of(buzzers);
void buzzer_init(struct buzzer *buzzer)
{
timer_reset(buzzer->timer);
timer_set_mode(buzzer->timer, TIM_CR1_CKD_CK_INT, TIM_CR1_CMS_EDGE, TIM_CR1_DIR_UP);
timer_set_prescaler(buzzer->timer, 48);
timer_set_repetition_counter(buzzer->timer, 0);
timer_enable_preload(buzzer->timer);
timer_enable_break_main_output(buzzer->timer);
timer_continuous_mode(buzzer->timer);
timer_disable_oc_output(buzzer->timer, buzzer->channel);
timer_set_oc_mode(buzzer->timer, buzzer->channel, TIM_OCM_PWM1);
timer_set_oc_value(buzzer->timer, buzzer->channel, 0);
timer_enable_oc_output(buzzer->timer, buzzer->channel);
}
void buzzer_enable(struct buzzer *buzzer)
{
timer_enable_counter(buzzer->timer);
}
void buzzer_disable(struct buzzer *buzzer)
{
timer_disable_counter(buzzer->timer);
}
void buzzer_set_freq(struct buzzer *buzzer, uint32_t freq)
{
uint32_t period = 1000000 / freq;
timer_set_period(buzzer->timer, period);
timer_set_oc_value(buzzer->timer, buzzer->channel, period / 2);
}

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source/platform/stm32f1/buzzer.c Normal file
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#include <libopencm3/stm32/gpio.h>
#include <libopencm3/stm32/rcc.h>
#include <libopencm3/stm32/timer.h>
#include <buzzer.h>
#include <macros.h>
struct buzzer buzzers[] = {
{ TIM2, TIM_OC3 },
{ TIM2, TIM_OC4 },
};
size_t nbuzzers = count_of(buzzers);
void buzzer_init(struct buzzer *buzzer)
{
timer_reset(buzzer->timer);
timer_set_mode(buzzer->timer, TIM_CR1_CKD_CK_INT, TIM_CR1_CMS_EDGE,
TIM_CR1_DIR_UP);
timer_set_prescaler(buzzer->timer, 72);
timer_set_repetition_counter(buzzer->timer, 0);
timer_enable_preload(buzzer->timer);
timer_enable_break_main_output(buzzer->timer);
timer_continuous_mode(buzzer->timer);
timer_disable_oc_output(buzzer->timer, buzzer->channel);
timer_set_oc_mode(buzzer->timer, buzzer->channel, TIM_OCM_PWM1);
timer_set_oc_value(buzzer->timer, buzzer->channel, 0);
timer_enable_oc_output(buzzer->timer, buzzer->channel);
}
void buzzer_enable(struct buzzer *buzzer)
{
timer_enable_counter(buzzer->timer);
}
void buzzer_disable(struct buzzer *buzzer)
{
timer_disable_counter(buzzer->timer);
}
void buzzer_set_freq(struct buzzer *buzzer, uint32_t freq)
{
uint32_t period = 1000000 / freq;
timer_set_period(buzzer->timer, period);
timer_set_oc_value(buzzer->timer, buzzer->channel, period / 2);
}