lora-car/libopencm3/lib/efm32/common/timer_common.c

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/** @addtogroup timer_file TIMER peripheral API
* @ingroup peripheral_apis
*/
/*
* This file is part of the libopencm3 project.
*
* Copyright (C) 2015 Kuldeep Singh Dhaka <kuldeepdhaka9@gmail.com>
*
* This library is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this library. If not, see <http://www.gnu.org/licenses/>.
*/
#include <libopencm3/efm32/timer.h>
/**@{*/
#define HAS_DEAD_TIME_INSERTION(timer) (timer == TIMER0)
/**
* Start timer
* @param[in] timer Timer (use TIMERx)
*/
void timer_start(uint32_t timer)
{
TIMER_CMD(timer) = TIMER_CMD_START;
}
/**
* Stop timer
* @param[in] timer Timer (use TIMERx)
*/
void timer_stop(uint32_t timer)
{
TIMER_CMD(timer) = TIMER_CMD_STOP;
}
/** Clock division factor
* @param[in] timer Timer (use TIMERx)
* @param[in] presc Factor (use TIMER_CTRL_PRESC_DIV*)
* @note output-clock = input-clock / @a presc
*/
void timer_set_clock_prescaler(uint32_t timer, uint32_t presc)
{
TIMER_CTRL(timer) = (TIMER_CTRL(timer) & ~TIMER_CTRL_PRESC_MASK)
| TIMER_CTRL_PRESC(presc);
}
/**
* Start timer top value
* the timer reload after it reaches top value
* @param[in] timer Timer (use TIMERx)
* @param[in] top Top value
*/
void timer_set_top(uint32_t timer, uint32_t top)
{
TIMER_TOP(timer) = top;
}
/**@}*/