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epd42/components/drivers_nrf/timer/nrf_drv_timer.c
Shuanglei Tao f353d23368 Initial commit
2024-11-11 15:35:36 +08:00

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/* Copyright (c) 2015 Nordic Semiconductor. All Rights Reserved.
*
* The information contained herein is property of Nordic Semiconductor ASA.
* Terms and conditions of usage are described in detail in NORDIC
* SEMICONDUCTOR STANDARD SOFTWARE LICENSE AGREEMENT.
*
* Licensees are granted free, non-transferable use of the information. NO
* WARRANTY of ANY KIND is provided. This heading must NOT be removed from
* the file.
*
*/
#include "nrf_drv_timer.h"
#include "nrf_assert.h"
#include "nrf_drv_common.h"
#include "app_util_platform.h"
/**@brief Timer control block. */
typedef struct
{
nrf_drv_state_t state;
} nrf_drv_timer_cb_t;
/**@brief Array for storing timers event handlers. */
static nrf_timer_event_handler_t m_timer_event_handlers[TIMER_COUNT];
static nrf_drv_timer_cb_t m_cb[TIMER_COUNT];
static void* mp_contexts[TIMER_COUNT];
static const nrf_drv_timer_config_t m_default_config[] = {
#if (TIMER0_ENABLED == 1)
NRF_DRV_TIMER_DEFAULT_CONFIG(0),
#endif
#if (TIMER1_ENABLED == 1)
NRF_DRV_TIMER_DEFAULT_CONFIG(1),
#endif
#if (TIMER2_ENABLED == 1)
NRF_DRV_TIMER_DEFAULT_CONFIG(2)
#endif
};
ret_code_t nrf_drv_timer_init(nrf_drv_timer_t const * const p_instance,
nrf_drv_timer_config_t const * p_config,
nrf_timer_event_handler_t timer_event_handler)
{
ASSERT((p_instance->instance_id) < TIMER_INSTANCE_NUMBER);
ASSERT(TIMER_IS_BIT_WIDTH_VALID(p_instance->instance_id, p_config->bit_width));
if (m_cb[p_instance->instance_id].state != NRF_DRV_STATE_UNINITIALIZED)
{
return NRF_ERROR_INVALID_STATE; // timer already initialized
}
if (p_config == NULL)
{
p_config = &m_default_config[p_instance->instance_id];
}
#ifdef SOFTDEVICE_PRESENT
if (p_instance->p_reg == NRF_TIMER0)
{
return NRF_ERROR_INVALID_PARAM;
}
#endif
nrf_drv_common_irq_enable(p_instance->irq, p_config->interrupt_priority);
mp_contexts[p_instance->instance_id] = p_config->p_context;
if (timer_event_handler != NULL)
{
m_timer_event_handlers[p_instance->instance_id] = timer_event_handler;
}
else
{
return NRF_ERROR_INVALID_PARAM;
}
nrf_timer_mode_set(p_instance->p_reg, p_config->mode);
nrf_timer_bit_width_set(p_instance->p_reg, p_config->bit_width);
nrf_timer_frequency_set(p_instance->p_reg, p_config->frequency);
m_cb[p_instance->instance_id].state = NRF_DRV_STATE_INITIALIZED;
return NRF_SUCCESS;
}
void nrf_drv_timer_uninit(nrf_drv_timer_t const * const p_instance)
{
uint32_t i;
nrf_drv_common_irq_disable(p_instance->irq);
m_timer_event_handlers[p_instance->instance_id] = NULL;
nrf_drv_timer_disable(p_instance);
//lint -save -e655
nrf_timer_shorts_disable(p_instance->p_reg, NRF_TIMER_SHORT_COMPARE0_STOP_MASK |
NRF_TIMER_SHORT_COMPARE1_STOP_MASK |
NRF_TIMER_SHORT_COMPARE2_STOP_MASK |
NRF_TIMER_SHORT_COMPARE3_STOP_MASK |
NRF_TIMER_SHORT_COMPARE0_CLEAR_MASK |
NRF_TIMER_SHORT_COMPARE1_CLEAR_MASK |
NRF_TIMER_SHORT_COMPARE2_CLEAR_MASK |
NRF_TIMER_SHORT_COMPARE3_CLEAR_MASK);
//lint -restore
for(i=0; i<TIMER_CHANNEL_NUMBER; i++)
{
nrf_timer_int_disable(p_instance->p_reg, NRF_TIMER_INT_COMPARE0_MASK << i);
}
m_cb[p_instance->instance_id].state = NRF_DRV_STATE_UNINITIALIZED;
}
void nrf_drv_timer_enable(nrf_drv_timer_t const * const p_instance)
{
ASSERT(m_cb[p_instance->instance_id].state == NRF_DRV_STATE_INITIALIZED);
nrf_timer_task_trigger(p_instance->p_reg, NRF_TIMER_TASK_START);
m_cb[p_instance->instance_id].state = NRF_DRV_STATE_POWERED_ON;
}
void nrf_drv_timer_disable(nrf_drv_timer_t const * const p_instance)
{
ASSERT(m_cb[p_instance->instance_id].state == NRF_DRV_STATE_POWERED_ON);
nrf_timer_task_trigger(p_instance->p_reg, NRF_TIMER_TASK_SHUTDOWN);
m_cb[p_instance->instance_id].state = NRF_DRV_STATE_INITIALIZED;
}
void nrf_drv_timer_resume(nrf_drv_timer_t const * const p_instance)
{
ASSERT(m_cb[p_instance->instance_id].state == NRF_DRV_STATE_POWERED_ON);
nrf_timer_task_trigger(p_instance->p_reg, NRF_TIMER_TASK_START);
}
void nrf_drv_timer_pause(nrf_drv_timer_t const * const p_instance)
{
ASSERT(m_cb[p_instance->instance_id].state == NRF_DRV_STATE_POWERED_ON);
nrf_timer_task_trigger(p_instance->p_reg, NRF_TIMER_TASK_STOP);
}
void nrf_drv_timer_clear(nrf_drv_timer_t const * const p_instance)
{
ASSERT(m_cb[p_instance->instance_id].state != NRF_DRV_STATE_UNINITIALIZED);
nrf_timer_task_trigger(p_instance->p_reg, NRF_TIMER_TASK_CLEAR);
}
void nrf_drv_timer_increment(nrf_drv_timer_t const * const p_instance)
{
ASSERT(m_cb[p_instance->instance_id].state == NRF_DRV_STATE_POWERED_ON);
ASSERT(nrf_timer_mode_get(p_instance->p_reg) == NRF_TIMER_MODE_COUNTER);
nrf_timer_task_trigger(p_instance->p_reg, NRF_TIMER_TASK_COUNT);
}
uint32_t nrf_drv_timer_task_address_get(nrf_drv_timer_t const * const p_instance,
nrf_timer_task_t timer_task)
{
return (uint32_t)nrf_timer_task_address_get(p_instance->p_reg, timer_task);
}
uint32_t nrf_drv_timer_event_address_get(nrf_drv_timer_t const * const p_instance,
nrf_timer_event_t timer_event)
{
return (uint32_t)nrf_timer_event_address_get(p_instance->p_reg, timer_event);
}
/**
* @brief Function for getting the specific timer capture task.
*
* @param[in] channel Capture channel number.
*
* @retval Capture task.
*/
__STATIC_INLINE nrf_timer_task_t nrf_drv_timer_capture_task_get(uint32_t channel)
{
/* nrf_timer_tasks_t stores offset value and distance between two tasks equals to sizeof(uint32_t) = 4 */
return (nrf_timer_task_t)((uint32_t) NRF_TIMER_TASK_CAPTURE0 + (channel * sizeof(uint32_t)));
}
/**
* @brief Function for getting the specific timer compare event.
*
* @param[in] channel Compare channel number.
*
* @retval Compare event.
*/
__STATIC_INLINE nrf_timer_event_t nrf_drv_timer_compare_event_get(uint32_t channel)
{
return (nrf_timer_event_t)((uint32_t) NRF_TIMER_EVENT_COMPARE0 + (channel * sizeof(uint32_t)));
}
uint32_t nrf_drv_timer_capture_task_address_get(nrf_drv_timer_t const * const p_instance,
uint32_t channel)
{
ASSERT(channel < TIMER_CHANNEL_NUMBER);
return (uint32_t)nrf_timer_task_address_get(p_instance->p_reg,
nrf_drv_timer_capture_task_get(channel));
}
uint32_t nrf_drv_timer_compare_event_address_get(nrf_drv_timer_t const * const p_instance,
uint32_t channel)
{
ASSERT(channel < TIMER_CHANNEL_NUMBER);
return (uint32_t)nrf_timer_event_address_get(p_instance->p_reg,
nrf_drv_timer_compare_event_get(channel) );
}
uint32_t nrf_drv_timer_capture(nrf_drv_timer_t const * const p_instance,
nrf_timer_cc_channel_t cc_channel)
{
ASSERT(m_cb[p_instance->instance_id].state == NRF_DRV_STATE_POWERED_ON);
ASSERT(cc_channel < TIMER_CHANNEL_NUMBER);
/*lint -save -e644*/
nrf_timer_task_trigger(p_instance->p_reg, nrf_drv_timer_capture_task_get(cc_channel));
/*lint -restore*/
return nrf_timer_cc_read(p_instance->p_reg, cc_channel);
}
uint32_t nrf_drv_timer_capture_get(nrf_drv_timer_t const * const p_instance,
nrf_timer_cc_channel_t cc_channel)
{
return nrf_timer_cc_read(p_instance->p_reg, cc_channel);
}
void nrf_drv_timer_compare(nrf_drv_timer_t const * const p_instance,
nrf_timer_cc_channel_t cc_channel,
uint32_t cc_value,
bool enable)
{
nrf_timer_int_mask_t timer_int;
timer_int = (nrf_timer_int_mask_t)((uint32_t)NRF_TIMER_INT_COMPARE0_MASK << cc_channel);
if (enable == true)
{
/*lint -save -e644*/
nrf_timer_int_enable(p_instance->p_reg, timer_int);
/*lint -restore*/
}
else
{
nrf_timer_int_disable(p_instance->p_reg, timer_int);
}
nrf_timer_cc_write(p_instance->p_reg, cc_channel, cc_value);
}
void nrf_drv_timer_extended_compare(nrf_drv_timer_t const * const p_instance,
nrf_timer_cc_channel_t cc_channel,
uint32_t cc_value,
nrf_timer_short_mask_t timer_short_mask,
bool enable)
{
nrf_timer_shorts_disable(p_instance->p_reg, TIMER_CC_SHORT(cc_channel));
nrf_timer_shorts_enable(p_instance->p_reg, timer_short_mask);
(void)nrf_drv_timer_compare(p_instance,
cc_channel,
cc_value,
enable);
}
uint32_t nrf_drv_timer_us_to_ticks(nrf_drv_timer_t const * const p_instance,
uint32_t time_us)
{
uint32_t multiplier = 512UL; //must be divisible by 2^(PRESCALER_MAX)
uint32_t prescaler_value = nrf_timer_frequency_get(p_instance->p_reg);
ASSERT(prescaler_value <= 9); //maximum prescaler value
ASSERT((UINT32_MAX / (multiplier >> prescaler_value)) > time_us);
return (((multiplier >> prescaler_value) * time_us) / 32UL); //32 -> multiplier divided by clock freq. in MHz
}
uint32_t nrf_drv_timer_ms_to_ticks(nrf_drv_timer_t const * const p_instance,
uint32_t time_ms)
{
uint32_t multiplier = 64000UL; //must be divisible by 2^(PRESCALER_MAX)
uint32_t prescaler_value = nrf_timer_frequency_get(p_instance->p_reg);
ASSERT(prescaler_value <= 9); //maximum prescaler value
ASSERT((UINT32_MAX / (multiplier >> prescaler_value)) > time_ms);
return (((multiplier >> prescaler_value) * time_ms) / 4UL); //4 -> multiplier divided by clock freq. in kHz
}
void nrf_drv_timer_compare_int_enable(nrf_drv_timer_t const * const p_instance,
uint32_t channel)
{
ASSERT(m_cb[p_instance->instance_id].state != NRF_DRV_STATE_UNINITIALIZED);
ASSERT(channel < TIMER_CHANNEL_NUMBER);
nrf_timer_event_clear(p_instance->p_reg, nrf_drv_timer_compare_event_get(channel));
nrf_timer_int_enable(p_instance->p_reg, (uint32_t) NRF_TIMER_INT_COMPARE0_MASK << channel);
}
void nrf_drv_timer_compare_int_disable(nrf_drv_timer_t const * const p_instance,
uint32_t channel)
{
ASSERT(m_cb[p_instance->instance_id].state != NRF_DRV_STATE_UNINITIALIZED);
ASSERT(channel < TIMER_CHANNEL_NUMBER);
nrf_timer_int_disable(p_instance->p_reg, (uint32_t) NRF_TIMER_INT_COMPARE0_MASK << channel);
}
/**
* @brief This function is generic interrupt handler
*
* @param[in] p_reg pointer to timer registers
* @param[in] timer_id specifies the timer id
*
* @return NRF_SUCCESS on success, otherwise an error code.
*/
static void nrf_drv_timer_interrupt_handle(NRF_TIMER_Type * p_reg, uint32_t timer_id)
{
uint32_t i;
for(i=0; i<TIMER_CHANNEL_NUMBER; i++)
{
nrf_timer_event_t event = nrf_drv_timer_compare_event_get(i);
if (nrf_timer_event_check(p_reg, event)
&& nrf_timer_int_enable_check(p_reg, (nrf_timer_int_mask_t) ((uint32_t )NRF_TIMER_INT_COMPARE0_MASK << i)))
{
nrf_timer_event_clear(p_reg, event);
(m_timer_event_handlers[timer_id])(event, mp_contexts[timer_id]);
}
}
}
#if TIMER0_ENABLED == 1
void TIMER0_IRQHandler(void)
{
nrf_drv_timer_interrupt_handle(NRF_TIMER0, TIMER0_INSTANCE_INDEX);
}
#endif
#if TIMER1_ENABLED == 1
void TIMER1_IRQHandler(void)
{
nrf_drv_timer_interrupt_handle(NRF_TIMER1, TIMER1_INSTANCE_INDEX);
}
#endif
#if TIMER2_ENABLED == 1
void TIMER2_IRQHandler(void)
{
nrf_drv_timer_interrupt_handle(NRF_TIMER2, TIMER2_INSTANCE_INDEX);
}
#endif
#if TIMER3_ENABLED == 1
void TIMER3_IRQHandler(void)
{
nrf_drv_timer_interrupt_handle(NRF_TIMER3, TIMER3_INSTANCE_INDEX);
}
#endif
#if TIMER4_ENABLED == 1
void TIMER4_IRQHandler(void)
{
nrf_drv_timer_interrupt_handle(NRF_TIMER4, TIMER4_INSTANCE_INDEX);
}
#endif
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