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rt-thread-official/bsp/nuvoton/libraries/m480/rtt_port/drv_timer.c

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/**************************************************************************//**
*
* @copyright (C) 2020 Nuvoton Technology Corp. All rights reserved.
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
* 2020-2-7 YCHuang12 First version
*
******************************************************************************/
#include <rtconfig.h>
#if (defined(BSP_USING_TIMER) && defined(RT_USING_HWTIMER))
#include <rtdevice.h>
#include "NuMicro.h"
/* Private define ---------------------------------------------------------------*/
#define NU_TIMER_DEVICE(timer) (nu_timer_t *)(timer)
/* Private typedef --------------------------------------------------------------*/
typedef struct nu_timer
{
rt_hwtimer_t parent;
TIMER_T *timer_periph;
IRQn_Type IRQn;
} nu_timer_t;
/* Private functions ------------------------------------------------------------*/
static void nu_timer_init(rt_hwtimer_t *timer, rt_uint32_t state);
static rt_err_t nu_timer_start(rt_hwtimer_t *timer, rt_uint32_t cnt, rt_hwtimer_mode_t opmode);
static void nu_timer_stop(rt_hwtimer_t *timer);
static rt_uint32_t nu_timer_count_get(rt_hwtimer_t *timer);
static rt_err_t nu_timer_control(rt_hwtimer_t *timer, rt_uint32_t cmd, void *args);
/* Public functions -------------------------------------------------------------*/
/* Private variables ------------------------------------------------------------*/
#ifdef BSP_USING_TIMER0
static nu_timer_t nu_timer0;
#endif
#ifdef BSP_USING_TIMER1
static nu_timer_t nu_timer1;
#endif
#ifdef BSP_USING_TIMER2
static nu_timer_t nu_timer2;
#endif
#ifdef BSP_USING_TIMER3
static nu_timer_t nu_timer3;
#endif
static struct rt_hwtimer_info nu_timer_info =
{
12000000, /* maximum count frequency */
46875, /* minimum count frequency */
0xFFFFFF, /* the maximum counter value */
HWTIMER_CNTMODE_UP,/* Increment or Decreasing count mode */
};
static struct rt_hwtimer_ops nu_timer_ops =
{
nu_timer_init,
nu_timer_start,
nu_timer_stop,
nu_timer_count_get,
nu_timer_control
};
/* Functions define ------------------------------------------------------------*/
static void nu_timer_init(rt_hwtimer_t *timer, rt_uint32_t state)
{
RT_ASSERT(timer != RT_NULL);
nu_timer_t *nu_timer = NU_TIMER_DEVICE(timer->parent.user_data);
RT_ASSERT(nu_timer != RT_NULL);
RT_ASSERT(nu_timer->timer_periph != RT_NULL);
if (1 == state)
{
uint32_t timer_clk;
struct rt_hwtimer_info *info = &nu_timer_info;
timer_clk = TIMER_GetModuleClock(nu_timer->timer_periph);
info->maxfreq = timer_clk;
info->minfreq = timer_clk / 256;
TIMER_Open(nu_timer->timer_periph, TIMER_ONESHOT_MODE, 1);
TIMER_EnableInt(nu_timer->timer_periph);
NVIC_EnableIRQ(nu_timer->IRQn);
}
else
{
NVIC_DisableIRQ(nu_timer->IRQn);
TIMER_DisableInt(nu_timer->timer_periph);
TIMER_Close(nu_timer->timer_periph);
}
}
static rt_err_t nu_timer_start(rt_hwtimer_t *timer, rt_uint32_t cnt, rt_hwtimer_mode_t opmode)
{
rt_err_t err = RT_EOK;
RT_ASSERT(timer != RT_NULL);
nu_timer_t *nu_timer = NU_TIMER_DEVICE(timer->parent.user_data);
RT_ASSERT(nu_timer != RT_NULL);
RT_ASSERT(nu_timer->timer_periph != RT_NULL);
if (cnt > 1 && cnt <= 0xFFFFFF)
{
TIMER_SET_CMP_VALUE(nu_timer->timer_periph, cnt);
}
else
{
rt_kprintf("nu_timer_start set compared value failed\n");
err = RT_ERROR;
}
if (HWTIMER_MODE_PERIOD == opmode)
{
TIMER_SET_OPMODE(nu_timer->timer_periph, TIMER_PERIODIC_MODE);
}
else if (HWTIMER_MODE_ONESHOT == opmode)
{
TIMER_SET_OPMODE(nu_timer->timer_periph, TIMER_ONESHOT_MODE);
}
else
{
rt_kprintf("nu_timer_start set operation mode failed\n");
err = RT_ERROR;
}
TIMER_Start(nu_timer->timer_periph);
return err;
}
static void nu_timer_stop(rt_hwtimer_t *timer)
{
RT_ASSERT(timer != RT_NULL);
nu_timer_t *nu_timer = NU_TIMER_DEVICE(timer->parent.user_data);
RT_ASSERT(nu_timer != RT_NULL);
RT_ASSERT(nu_timer->timer_periph != RT_NULL);
TIMER_Stop(nu_timer->timer_periph);
}
static rt_uint32_t nu_timer_count_get(rt_hwtimer_t *timer)
{
RT_ASSERT(timer != RT_NULL);
nu_timer_t *nu_timer = NU_TIMER_DEVICE(timer->parent.user_data);
RT_ASSERT(nu_timer != RT_NULL);
RT_ASSERT(nu_timer->timer_periph != RT_NULL);
return TIMER_GetCounter(nu_timer->timer_periph);
}
static rt_err_t nu_timer_control(rt_hwtimer_t *timer, rt_uint32_t cmd, void *args)
{
rt_err_t ret = RT_EOK;
RT_ASSERT(timer != RT_NULL);
nu_timer_t *nu_timer = NU_TIMER_DEVICE(timer->parent.user_data);
RT_ASSERT(nu_timer != RT_NULL);
RT_ASSERT(nu_timer->timer_periph != RT_NULL);
switch (cmd)
{
case HWTIMER_CTRL_FREQ_SET:
{
uint32_t clk;
uint32_t pre;
clk = TIMER_GetModuleClock(nu_timer->timer_periph);
pre = clk / *((uint32_t *)args) - 1;
TIMER_SET_PRESCALE_VALUE(nu_timer->timer_periph, pre);
*((uint32_t *)args) = clk / (pre + 1) ;
}
break;
case HWTIMER_CTRL_STOP:
TIMER_Stop(nu_timer->timer_periph);
break;
default:
ret = RT_EINVAL;
break;
}
return ret;
}
int rt_hw_timer_init(void)
{
rt_err_t ret = RT_EOK;
#ifdef BSP_USING_TIMER0
nu_timer0.timer_periph = TIMER0;
nu_timer0.parent.info = &nu_timer_info;
nu_timer0.parent.ops = &nu_timer_ops;
nu_timer0.IRQn = TMR0_IRQn;
ret = rt_device_hwtimer_register(&nu_timer0.parent, "timer0", &nu_timer0);
if (ret != RT_EOK)
{
rt_kprintf("timer0 register failed\n");
}
SYS_ResetModule(TMR0_RST);
CLK_EnableModuleClock(TMR0_MODULE);
#endif
#ifdef BSP_USING_TIMER1
nu_timer1.timer_periph = TIMER1;
nu_timer1.parent.info = &nu_timer_info;
nu_timer1.parent.ops = &nu_timer_ops;
nu_timer1.IRQn = TMR1_IRQn;
ret = rt_device_hwtimer_register(&nu_timer1.parent, "timer1", &nu_timer1);
if (ret != RT_EOK)
{
rt_kprintf("timer1 register failed\n");
}
SYS_ResetModule(TMR1_RST);
CLK_EnableModuleClock(TMR1_MODULE);
#endif
#ifdef BSP_USING_TIMER2
nu_timer2.timer_periph = TIMER2;
nu_timer2.parent.info = &nu_timer_info;
nu_timer2.parent.ops = &nu_timer_ops;
nu_timer2.IRQn = TMR2_IRQn;
ret = rt_device_hwtimer_register(&nu_timer2.parent, "timer2", &nu_timer2);
if (ret != RT_EOK)
{
rt_kprintf("timer2 register failed\n");
}
SYS_ResetModule(TMR2_RST);
CLK_EnableModuleClock(TMR2_MODULE);
#endif
#ifdef BSP_USING_TIMER3
nu_timer3.timer_periph = TIMER3;
nu_timer3.parent.info = &nu_timer_info;
nu_timer3.parent.ops = &nu_timer_ops;
nu_timer3.IRQn = TMR3_IRQn;
ret = rt_device_hwtimer_register(&nu_timer3.parent, "timer3", &nu_timer3);
if (ret != RT_EOK)
{
rt_kprintf("timer3 register failed\n");
}
SYS_ResetModule(TMR3_RST);
CLK_EnableModuleClock(TMR3_MODULE);
#endif
return ret;
}
INIT_BOARD_EXPORT(rt_hw_timer_init);
#ifdef BSP_USING_TIMER0
void TMR0_IRQHandler(void)
{
rt_interrupt_enter();
if (TIMER_GetIntFlag(TIMER0))
{
TIMER_ClearIntFlag(TIMER0);
rt_device_hwtimer_isr(&nu_timer0.parent);
}
rt_interrupt_leave();
}
#endif
#ifdef BSP_USING_TIMER1
void TMR1_IRQHandler(void)
{
rt_interrupt_enter();
if (TIMER_GetIntFlag(TIMER1))
{
TIMER_ClearIntFlag(TIMER1);
rt_device_hwtimer_isr(&nu_timer1.parent);
}
rt_interrupt_leave();
}
#endif
#ifdef BSP_USING_TIMER2
void TMR2_IRQHandler(void)
{
rt_interrupt_enter();
if (TIMER_GetIntFlag(TIMER2))
{
TIMER_ClearIntFlag(TIMER2);
rt_device_hwtimer_isr(&nu_timer2.parent);
}
rt_interrupt_leave();
}
#endif
#ifdef BSP_USING_TIMER3
void TMR3_IRQHandler(void)
{
rt_interrupt_enter();
if (TIMER_GetIntFlag(TIMER3))
{
TIMER_ClearIntFlag(TIMER3);
rt_device_hwtimer_isr(&nu_timer3.parent);
}
rt_interrupt_leave();
}
#endif
#endif //#if (defined(BSP_USING_TIMER) && defined(RT_USING_HWTIMER))
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