mirror of
https://github.com/jam422470459/EPD-nRF52-hema213.git
synced 2025-12-19 06:43:20 +08:00
move components to SDK dir
This commit is contained in:
Shuanglei Tao
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/**
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* Copyright (c) 2016 - 2017, Nordic Semiconductor ASA
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*
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without modification,
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* are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form, except as embedded into a Nordic
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* Semiconductor ASA integrated circuit in a product or a software update for
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* such product, must reproduce the above copyright notice, this list of
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* conditions and the following disclaimer in the documentation and/or other
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* materials provided with the distribution.
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*
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* 3. Neither the name of Nordic Semiconductor ASA nor the names of its
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* contributors may be used to endorse or promote products derived from this
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* software without specific prior written permission.
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*
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* 4. This software, with or without modification, must only be used with a
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* Nordic Semiconductor ASA integrated circuit.
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*
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* 5. Any software provided in binary form under this license must not be reverse
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* engineered, decompiled, modified and/or disassembled.
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*
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* THIS SOFTWARE IS PROVIDED BY NORDIC SEMICONDUCTOR ASA "AS IS" AND ANY EXPRESS
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* OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY, NONINFRINGEMENT, AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL NORDIC SEMICONDUCTOR ASA OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
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* GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
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* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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*/
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#include "sdk_common.h"
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#if NRF_MODULE_ENABLED(SYSTICK)
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#include "nrf_drv_systick.h"
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#include "nrf_systick.h"
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#include "nrf.h"
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#include "nrf_assert.h"
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/**
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* @brief Maximum number of ticks to delay
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*
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* The maximum number of ticks should be much lower than
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* Physical maximum count of the SysTick timer.
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* It is dictated by the fact that it would be impossible to detect delay
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* properly when the timer value warps around the starting point.
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*/
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#define NRF_DRV_SYSTICK_TICKS_MAX (NRF_SYSTICK_VAL_MASK / 2UL)
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/**
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* @brief Number of milliseconds in a second
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*/
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#define NRF_DRV_SYSTICK_MS (1000UL)
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/**
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* @brief Number of microseconds in a second
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*/
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#define NRF_DRV_SYSTICK_US (1000UL * NRF_DRV_SYSTICK_MS)
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/**
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* @brief Number of milliseconds to wait in single loop
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*
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* Constant used by @ref nrd_drv_systick_delay_ms function
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* to split waiting into loops and rest.
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*
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* It describes the number of milliseconds to wait in single loop.
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*
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* See @ref nrf_drv_systick_delay_ms source code for details.
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*/
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#define NRF_DRV_SYSTICK_MS_STEP (64U)
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/**
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* @brief Checks if the given time is in correct range
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*
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* Function tests given time is not to big for this library.
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* Assertion is used for testing.
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*
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* @param us Time in microseconds to check
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*/
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#define NRF_DRV_SYSTICK_ASSERT_TIMEOUT(us) \
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ASSERT(us <= (NRF_DRV_SYSTICK_TICKS_MAX / ((SystemCoreClock) / NRF_DRV_SYSTICK_US)));
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/**
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* @brief Function that converts microseconds to ticks
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*
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* Function converts from microseconds to CPU ticks.
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*
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* @param us Number of microseconds
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*
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* @return Number of ticks
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*
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* @sa nrf_drv_systick_ms_tick
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*/
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static inline uint32_t nrf_drv_systick_us_tick(uint32_t us)
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{
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return us * ((SystemCoreClock) / NRF_DRV_SYSTICK_US);
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}
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/**
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* @brief Function that converts milliseconds to ticks
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*
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* Function converts from milliseconds to CPU ticks.
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*
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* @param us Number of milliseconds
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*
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* @return Number of ticks
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*
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* @sa nrf_drv_systick_us_tick
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*/
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static inline uint32_t nrf_drv_systick_ms_tick(uint32_t ms)
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{
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return ms * ((SystemCoreClock) / NRF_DRV_SYSTICK_MS);
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}
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void nrf_drv_systick_init(void)
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{
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nrf_systick_load_set(NRF_SYSTICK_VAL_MASK);
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nrf_systick_csr_set(
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NRF_SYSTICK_CSR_CLKSOURCE_CPU |
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NRF_SYSTICK_CSR_TICKINT_DISABLE |
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NRF_SYSTICK_CSR_ENABLE);
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}
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void nrf_drv_systick_get(nrf_drv_systick_state_t * p_state)
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{
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p_state->time = nrf_systick_val_get();
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}
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bool nrf_drv_systick_test(nrf_drv_systick_state_t const * p_state, uint32_t us)
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{
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NRF_DRV_SYSTICK_ASSERT_TIMEOUT(us);
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const uint32_t diff = NRF_SYSTICK_VAL_MASK & ((p_state->time) - nrf_systick_val_get());
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return (diff >= nrf_drv_systick_us_tick(us));
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}
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void nrf_drv_systick_delay_ticks(uint32_t ticks)
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{
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ASSERT(ticks <= NRF_DRV_SYSTICK_TICKS_MAX)
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const uint32_t start = nrf_systick_val_get();
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while((NRF_SYSTICK_VAL_MASK & (start - nrf_systick_val_get())) < ticks)
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{
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/* Nothing to do */
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}
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}
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void nrf_drv_systick_delay_us(uint32_t us)
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{
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NRF_DRV_SYSTICK_ASSERT_TIMEOUT(us);
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nrf_drv_systick_delay_ticks(nrf_drv_systick_us_tick(us));
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}
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void nrf_drv_systick_delay_ms(uint32_t ms)
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{
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uint32_t n = ms / NRF_DRV_SYSTICK_MS_STEP;
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uint32_t r = ms % NRF_DRV_SYSTICK_MS_STEP;
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while(0 != (n--))
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{
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nrf_drv_systick_delay_ticks(nrf_drv_systick_ms_tick(NRF_DRV_SYSTICK_MS_STEP));
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}
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nrf_drv_systick_delay_ticks(nrf_drv_systick_ms_tick(r));
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}
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#endif // NRF_MODULE_ENABLED(SYSTICK)
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@@ -0,0 +1,133 @@
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/**
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* Copyright (c) 2016 - 2017, Nordic Semiconductor ASA
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*
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without modification,
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* are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice, this
|
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* list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form, except as embedded into a Nordic
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* Semiconductor ASA integrated circuit in a product or a software update for
|
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* such product, must reproduce the above copyright notice, this list of
|
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* conditions and the following disclaimer in the documentation and/or other
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* materials provided with the distribution.
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*
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* 3. Neither the name of Nordic Semiconductor ASA nor the names of its
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* contributors may be used to endorse or promote products derived from this
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* software without specific prior written permission.
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*
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* 4. This software, with or without modification, must only be used with a
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* Nordic Semiconductor ASA integrated circuit.
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*
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* 5. Any software provided in binary form under this license must not be reverse
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* engineered, decompiled, modified and/or disassembled.
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*
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* THIS SOFTWARE IS PROVIDED BY NORDIC SEMICONDUCTOR ASA "AS IS" AND ANY EXPRESS
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* OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY, NONINFRINGEMENT, AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL NORDIC SEMICONDUCTOR ASA OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
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* GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
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* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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*/
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#ifndef NRF_DRV_SYSTICK_H__
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#define NRF_DRV_SYSTICK_H__
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#include <stdint.h>
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#include <stdbool.h>
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/**
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* @addtogroup nrf_systick SysTick HAL and driver
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* @ingroup nrf_drivers
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* @brief System Timer (SysTick) APIs
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*
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* The SysTick HAL provides basic APIs for accessing the registers of the system timer (SysTick).
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* The SysTick driver provides APIs on a higher level.
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*/
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/**
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* @defgroup nrf_drv_systick SysTick driver
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* @{
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* @ingroup nrf_systick
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*
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* This library configures SysTick as a free-running timer.
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* This timer is used to generate delays and pool for timeouts.
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* Only relatively short timeouts are supported.
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* The SysTick works on 64MHz and is 24-bits wide.
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* It means that it overflows around 4 times per second and around 250 ms
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* would be the highest supported time in the library.
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* But it would be really hard to detect if overflow was generated without
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* using interrupts. For safely we would limit the maximum delay range by half.
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*/
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/**
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* @brief The value type that holds the SysTick state
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*
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* This variable is used to count the requested timeout.
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* @sa nrf_drv_systick_get
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*/
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typedef struct {
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uint32_t time; //!< Registered time value
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}nrf_drv_systick_state_t;
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/**
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* @brief Configure and start the timer
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*
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* Function configures SysTick as a free-running timer without interrupt.
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*/
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void nrf_drv_systick_init(void);
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/**
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* @brief Get current SysTick state
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*
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* Function gets current state of the SysTick timer.
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* It can be used to check time-out by @ref nrf_drv_systick_test.
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*
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* @param[out] p_state The pointer to the state variable to be filled
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*/
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void nrf_drv_systick_get(nrf_drv_systick_state_t * p_state);
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/**
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* @brief Test if specified time is up in relation to remembered state
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*
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* @param[in] p_state Remembered state set by @ref nrf_drv_systick_get
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* @param[in] us Required time-out.
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*
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* @retval true If current time is higher than specified state plus given time-out.
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* @retval false If current time is lower than specified state plus given time-out
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*/
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bool nrf_drv_systick_test(nrf_drv_systick_state_t const * p_state, uint32_t us);
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/**
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* @brief Blocking delay in CPU ticks
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*
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* @param[in] ticks Number of CPU ticks to delay.
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*/
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void nrf_drv_systick_delay_ticks(uint32_t ticks);
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/**
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* @brief Blocking delay in us
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*
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* @param[in] us Number of microseconds to delay.
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*/
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void nrf_drv_systick_delay_us(uint32_t us);
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/**
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* @brief Blocking delay in ms
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*
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* This delay function removes the limits of the highest possible delay value.
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*
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* @param[in] ms Number of milliseconds to delay.
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*/
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void nrf_drv_systick_delay_ms(uint32_t ms);
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/** @} */
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#endif /* NRF_DRV_SYSTICK_H__ */
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