contiki/cpu/arm/stm32l152/rtimer-arch.c

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2015-10-09 17:40:39 +00:00
/*
* Copyright (c) 2012, STMicroelectronics.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the Institute nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
*
*/
/*---------------------------------------------------------------------------*/
#include "contiki.h"
#include "platform-conf.h"
#include "sys/rtimer.h"
#include "sys/process.h"
#include "dev/watchdog.h"
#include "stm32l1xx.h"
#include "stm32l1xx_hal_gpio.h"
#include "stm32l1xx_hal_rcc.h"
#include "stm32l1xx_hal_tim.h"
#include "stm32l1xx_hal_cortex.h"
#include "st-lib.h"
/*---------------------------------------------------------------------------*/
volatile uint32_t rtimer_clock = 0uL;
/*---------------------------------------------------------------------------*/
st_lib_tim_handle_typedef htim2;
/*---------------------------------------------------------------------------*/
void
st_lib_tim2_irq_handler(void)
{
/* clear interrupt pending flag */
st_lib_hal_tim_clear_it(&htim2, TIM_IT_UPDATE);
rtimer_clock++;
}
/*---------------------------------------------------------------------------*/
void
rtimer_arch_init(void)
{
st_lib_tim_clock_config_typedef s_clock_source_config;
st_lib_tim_oc_init_typedef s_config_oc;
st_lib_tim2_clk_enable();
htim2.Instance = TIM2;
htim2.Init.Prescaler = PRESCALER;
htim2.Init.CounterMode = TIM_COUNTERMODE_UP;
htim2.Init.Period = 1;
st_lib_hal_tim_base_init(&htim2);
st_lib_hal_tim_base_start_it(&htim2);
s_clock_source_config.ClockSource = TIM_CLOCKSOURCE_INTERNAL;
st_lib_hal_tim_config_clock_source(&htim2, &s_clock_source_config);
st_lib_hal_tim_oc_init(&htim2);
s_config_oc.OCMode = TIM_OCMODE_TIMING;
s_config_oc.Pulse = 0;
s_config_oc.OCPolarity = TIM_OCPOLARITY_HIGH;
st_lib_hal_tim_oc_config_channel(&htim2, &s_config_oc, TIM_CHANNEL_1);
st_lib_hal_tim_clear_flag(&htim2, TIM_FLAG_UPDATE);
/* Enable TIM2 Update interrupt */
st_lib_hal_tim_enable_it(&htim2, TIM_IT_UPDATE);
st_lib_hal_tim_enable(&htim2);
st_lib_hal_nvic_set_priority((st_lib_irq_n_type)TIM2_IRQn, 0, 0);
st_lib_hal_nvic_enable_irq((st_lib_irq_n_type)(TIM2_IRQn));
}
/*---------------------------------------------------------------------------*/
rtimer_clock_t
rtimer_arch_now(void)
{
return rtimer_clock;
}
/*---------------------------------------------------------------------------*/
void
rtimer_arch_schedule(rtimer_clock_t t)
{
}
/*---------------------------------------------------------------------------*/