125 lines
2.7 KiB
C
125 lines
2.7 KiB
C
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/*
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* Copyright (C) 2018 Shanghai Eastsoft Microelectronics Co., Ltd.
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*
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* SPDX-License-Identifier: Apache-2.0
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*
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* Change Logs:
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* Date Author Notes
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* 2019-11-01 wangyq first version
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*/
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#include <board.h>
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#include <drv_lptim.h>
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#include <ald_lptim.h>
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static lptim_handle_t h_lptim;
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void LPTIM0_SPI2_Handler(void)
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{
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/* LPTIM Intetrupt */
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if (ald_lptim_get_it_status(&h_lptim, LPTIM_IT_ARRMAT) &&
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ald_lptim_get_flag_status(&h_lptim, LPTIM_FLAG_ARRMAT))
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{
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/* enter interrupt */
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rt_interrupt_enter();
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ald_lptim_clear_flag_status(&h_lptim, LPTIM_FLAG_ARRMAT);
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/* leave interrupt */
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rt_interrupt_leave();
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}
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}
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/**
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* This function get current count value of LPTIM
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*
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* @return the count vlaue
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*/
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rt_uint32_t es32f0_lptim_get_current_tick(void)
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{
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return READ_REG(h_lptim.perh->CNT);
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}
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/**
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* This function get the max value that LPTIM can count
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*
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* @return the max count
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*/
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rt_uint32_t es32f0_lptim_get_tick_max(void)
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{
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return (0xFFFF);
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}
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/**
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* This function start LPTIM with reload value
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*
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* @param reload The value that LPTIM count down from
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*
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* @return RT_EOK
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*/
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rt_err_t es32f0_lptim_start(rt_uint32_t reload)
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{
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h_lptim.init.arr = reload;
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ald_lptim_toggle_start_by_it(&h_lptim);
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return (RT_EOK);
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}
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/**
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* This function stop LPTIM
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*/
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void es32f0_lptim_stop(void)
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{
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ald_lptim_toggle_stop_by_it(&h_lptim);
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}
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/**
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* This function get the count clock of LPTIM
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*
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* @return the count clock frequency in Hz
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*/
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rt_uint32_t es32f0_lptim_get_countfreq(void)
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{
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return 1000000;
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}
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/**
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* This function initialize the lptim
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*/
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int es32f0_hw_lptim_init(void)
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{
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lptim_clock_source_init_t clock_config;
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lptim_trigger_init_t trigger_config;
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/* Enable LPTIM clock */
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ald_cmu_perh_clock_config(CMU_PERH_LPTIM0, ENABLE);
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/* LPTIM Configuration */
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h_lptim.perh = LPTIM0;
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h_lptim.init.psc = LPTIM_PRESC_1; // can not select other premeter
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h_lptim.init.arr = 0x0FFF;
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h_lptim.init.clock = CMU_LP_PERH_CLOCK_SEL_HRC_1M;
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h_lptim.init.mode = LPTIM_MODE_SINGLE;
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ald_lptim_toggle_init(&h_lptim);
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/* Initialize clock source */
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clock_config.sel = LPTIM_CKSEL_INTERNAL;
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clock_config.polarity = LPTIM_CKPOL_RISING;
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ald_lptim_clock_source_config(&h_lptim, &clock_config);
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/* Initialize toggle */
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trigger_config.mode = LPTIM_TRIGEN_SW;
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ald_lptim_trigger_config(&h_lptim, &trigger_config);
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ald_lptim_interrupt_config(&h_lptim, LPTIM_IT_ARRMAT, ENABLE);
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NVIC_ClearPendingIRQ(LPTIM0_SPI2_IRQn);
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NVIC_SetPriority(LPTIM0_SPI2_IRQn, 0);
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NVIC_EnableIRQ(LPTIM0_SPI2_IRQn);
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return 0;
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}
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INIT_DEVICE_EXPORT(es32f0_hw_lptim_init);
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