mirror of https://github.com/ARMmbed/mbed-os.git
99 lines
2.6 KiB
C
99 lines
2.6 KiB
C
/*
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* mbed Microcontroller Library
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* Copyright (c) 2017-2018 Future Electronics
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* Copyright (c) 2019, Arm Limited and affiliates.
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* SPDX-License-Identifier: Apache-2.0
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include "lp_ticker_api.h"
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#include "mbed_error.h"
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#include "cyhal_lptimer.h"
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#include "cycfg.h"
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#if DEVICE_LPTICKER
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#ifdef __cplusplus
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extern "C" {
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#endif
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static cyhal_lptimer_t cy_lptimer0;
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static bool cy_lptimer_initialized = false;
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static void cy_lp_ticker_handler(MBED_UNUSED void *unused1, MBED_UNUSED cyhal_lptimer_event_t unused2)
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{
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lp_ticker_irq_handler();
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}
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void lp_ticker_init(void)
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{
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// It should be safe to call this function more than once
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if (!cy_lptimer_initialized) {
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if (CY_RSLT_SUCCESS != cyhal_lptimer_init(&cy_lptimer0)) {
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MBED_ERROR(MBED_MAKE_ERROR(MBED_MODULE_DRIVER, MBED_ERROR_CODE_FAILED_OPERATION), "cyhal_lptimer_init");
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}
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cy_lptimer_initialized = true;
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}
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lp_ticker_disable_interrupt();
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cyhal_lptimer_register_callback(&cy_lptimer0, &cy_lp_ticker_handler, NULL);
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}
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void lp_ticker_free(void)
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{
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cyhal_lptimer_free(&cy_lptimer0);
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cy_lptimer_initialized = false;
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}
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uint32_t lp_ticker_read(void)
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{
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return cyhal_lptimer_read(&cy_lptimer0);
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}
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void lp_ticker_set_interrupt(timestamp_t timestamp)
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{
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if (CY_RSLT_SUCCESS != cyhal_lptimer_set_match(&cy_lptimer0, (uint32_t)timestamp)) {
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MBED_ERROR(MBED_MAKE_ERROR(MBED_MODULE_DRIVER, MBED_ERROR_CODE_FAILED_OPERATION), "cyhal_lptimer_set_match");
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}
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}
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void lp_ticker_disable_interrupt(void)
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{
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cyhal_lptimer_enable_event(&cy_lptimer0, CYHAL_LPTIMER_COMPARE_MATCH, CYHAL_ISR_PRIORITY_DEFAULT, false);
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}
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void lp_ticker_clear_interrupt(void)
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{
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// LPTIMER driver does this automatically; nothing to do
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}
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void lp_ticker_fire_interrupt(void)
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{
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cyhal_lptimer_irq_trigger(&cy_lptimer0);
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}
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const ticker_info_t *lp_ticker_get_info(void)
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{
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static const ticker_info_t info = {
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/* .frequency = */ CY_CFG_SYSCLK_CLKLF_FREQ_HZ,
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/* .bits = */ 32
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};
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return &info;
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}
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#ifdef __cplusplus
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}
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#endif
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#endif
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