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53 lines
1.4 KiB
C
53 lines
1.4 KiB
C
// Copyright 2015-2017 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 <stdint.h>
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#include <sys/param.h>
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#include "esp_attr.h"
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#include "soc/rtc.h"
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#include "esp32/clk.h"
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#define MHZ (1000000)
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// g_ticks_us defined in ROMs for PRO and APP CPU
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extern uint32_t g_ticks_per_us_pro;
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#ifndef CONFIG_FREERTOS_UNICORE
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extern uint32_t g_ticks_per_us_app;
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#endif
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int IRAM_ATTR esp_clk_cpu_freq(void)
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{
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return g_ticks_per_us_pro * MHZ;
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}
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int IRAM_ATTR esp_clk_apb_freq(void)
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{
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return MIN(g_ticks_per_us_pro, 80) * MHZ;
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}
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int IRAM_ATTR esp_clk_xtal_freq(void)
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{
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return rtc_clk_xtal_freq_get() * MHZ;
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}
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void IRAM_ATTR ets_update_cpu_frequency(uint32_t ticks_per_us)
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{
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/* Update scale factors used by esp_rom_delay_us */
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g_ticks_per_us_pro = ticks_per_us;
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#ifndef CONFIG_FREERTOS_UNICORE
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g_ticks_per_us_app = ticks_per_us;
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#endif
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}
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