kopia lustrzana https://github.com/espressif/esp-idf
51 wiersze
1.9 KiB
C
51 wiersze
1.9 KiB
C
// Copyright 2020 Espressif Systems (Shanghai) PTE LTD
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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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#include "test_utils.h"
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#include "driver/periph_ctrl.h"
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#include "soc/periph_defs.h"
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#include "hal/timer_hal.h"
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#define TIMER_GROUP_ID (1)
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#define TIMER_ID (0)
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static timer_hal_context_t timer_hal;
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void ref_clock_init(void)
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{
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periph_module_enable(PERIPH_TIMG1_MODULE);
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timer_hal_init(&timer_hal, TIMER_GROUP_ID, TIMER_ID);
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timer_hal_set_use_xtal(&timer_hal, true); // Select XTAL, so ref_clock is independent of the APL clock
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timer_hal_set_divider(&timer_hal, 40); // Resolution is configured to 1MHz
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timer_hal_set_counter_increase(&timer_hal, true); // increase mode
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timer_hal_set_counter_enable(&timer_hal, false); // stop timer from running
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timer_hal_set_counter_value(&timer_hal, 0); // initial count value to zero
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timer_hal_intr_disable(&timer_hal); // disable interrupt
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timer_hal_set_alarm_enable(&timer_hal, false); // we don't need to generate any interrupt
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timer_hal_set_auto_reload(&timer_hal, false);
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timer_hal_set_counter_enable(&timer_hal, true); // start counter
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}
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void ref_clock_deinit(void)
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{
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timer_hal_set_counter_enable(&timer_hal, false); // stop timer from running
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periph_module_disable(PERIPH_TIMG1_MODULE);
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}
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uint64_t ref_clock_get(void)
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{
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uint64_t count_value = 0;
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timer_hal_get_counter_value(&timer_hal, &count_value);
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return count_value;
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}
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