unleashed-firmware/applications/ibutton/helpers/pulse-sequencer.cpp
2021-08-08 21:03:25 +03:00

88 lines
2.4 KiB
C++

#include "pulse-sequencer.h"
#include <furi.h>
#include <callback-connector.h>
#include <furi-hal-resources.h>
void PulseSequencer::set_periods(
uint32_t* _periods,
uint16_t _periods_count,
bool _pin_start_state) {
periods = _periods;
periods_count = _periods_count;
pin_start_state = _pin_start_state;
}
void PulseSequencer::start() {
callback_pointer = cbc::obtain_connector(this, &PulseSequencer::timer_elapsed_callback);
api_interrupt_add(callback_pointer, InterruptTypeTimerUpdate, this);
period_index = 1;
init_timer(periods[period_index]);
pin_state = pin_start_state;
hal_gpio_write(&ibutton_gpio, pin_state);
pin_state = !pin_state;
HAL_TIM_Base_Start_IT(&htim1);
}
void PulseSequencer::stop() {
HAL_TIM_Base_Stop_IT(&htim1);
api_interrupt_remove(callback_pointer, InterruptTypeTimerUpdate);
deinit_timer();
}
PulseSequencer::~PulseSequencer() {
stop();
}
void PulseSequencer::init_timer(uint32_t period) {
TIM_ClockConfigTypeDef sClockSourceConfig = {0};
htim1.Instance = TIM1;
htim1.Init.Prescaler = 0;
htim1.Init.CounterMode = TIM_COUNTERMODE_UP;
htim1.Init.Period = period;
htim1.Init.ClockDivision = TIM_CLOCKDIVISION_DIV1;
htim1.Init.RepetitionCounter = 0;
htim1.Init.AutoReloadPreload = TIM_AUTORELOAD_PRELOAD_DISABLE;
if(HAL_TIM_Base_Init(&htim1) != HAL_OK) {
Error_Handler();
}
sClockSourceConfig.ClockSource = TIM_CLOCKSOURCE_INTERNAL;
if(HAL_TIM_ConfigClockSource(&htim1, &sClockSourceConfig) != HAL_OK) {
Error_Handler();
}
HAL_NVIC_SetPriority(TIM1_UP_TIM16_IRQn, 5, 0);
HAL_NVIC_EnableIRQ(TIM1_UP_TIM16_IRQn);
hal_gpio_init(&ibutton_gpio, GpioModeOutputOpenDrain, GpioPullNo, GpioSpeedLow);
}
void PulseSequencer::deinit_timer() {
}
void PulseSequencer::timer_elapsed_callback(void* hw, void* context) {
PulseSequencer* _this = static_cast<PulseSequencer*>(context);
TIM_HandleTypeDef* htim = static_cast<TIM_HandleTypeDef*>(hw);
if(htim->Instance == TIM1) {
htim->Instance->ARR = _this->periods[_this->period_index];
if(_this->period_index == 0) {
_this->pin_state = _this->pin_start_state;
} else {
_this->pin_state = !_this->pin_state;
}
hal_gpio_write(&ibutton_gpio, _this->pin_state);
_this->period_index++;
if(_this->period_index == _this->periods_count) {
_this->period_index = 0;
}
}
}