5ab769516d
Note that with WiFi stack enabled, system_init will reset frequency to 240MHz. To make this setting useful, esp32-wifi-libs submodule needs to be updated.
68 lines
1.8 KiB
C
68 lines
1.8 KiB
C
// Copyright 2015-2016 Espressif Systems (Shanghai) PTE LTD
|
|
//
|
|
// Licensed under the Apache License, Version 2.0 (the "License");
|
|
// you may not use this file except in compliance with the License.
|
|
// You may obtain a copy of the License at
|
|
|
|
// http://www.apache.org/licenses/LICENSE-2.0
|
|
//
|
|
// Unless required by applicable law or agreed to in writing, software
|
|
// distributed under the License is distributed on an "AS IS" BASIS,
|
|
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
// See the License for the specific language governing permissions and
|
|
// limitations under the License.
|
|
|
|
#include <stdint.h>
|
|
#include "rom/ets_sys.h"
|
|
#include "sdkconfig.h"
|
|
|
|
typedef enum{
|
|
XTAL_40M = 40,
|
|
XTAL_26M = 26,
|
|
XTAL_24M = 24,
|
|
XTAL_AUTO = 0
|
|
} xtal_freq_t;
|
|
|
|
typedef enum{
|
|
CPU_80M = 1,
|
|
CPU_160M = 2,
|
|
CPU_240M = 3,
|
|
} cpu_freq_t;
|
|
|
|
extern void phy_get_romfunc_addr();
|
|
|
|
// TODO: these functions need to be moved from librtc to ESP-IDF
|
|
extern void rtc_init_lite();
|
|
extern void rtc_set_cpu_freq(xtal_freq_t xtal_freq, cpu_freq_t cpu_freq);
|
|
|
|
/*
|
|
* This function is not exposed as an API at this point,
|
|
* because FreeRTOS doesn't yet support dynamic changing of
|
|
* CPU frequency. Also we need to implement hooks for
|
|
* components which want to be notified of CPU frequency
|
|
* changes.
|
|
*/
|
|
void esp_set_cpu_freq()
|
|
{
|
|
uint32_t freq_mhz = CONFIG_ESP32_DEFAULT_CPU_FREQ_MHZ;
|
|
phy_get_romfunc_addr();
|
|
rtc_init_lite();
|
|
cpu_freq_t freq = CPU_80M;
|
|
switch(freq_mhz) {
|
|
case 240:
|
|
freq = CPU_240M;
|
|
break;
|
|
case 160:
|
|
freq = CPU_160M;
|
|
break;
|
|
default:
|
|
freq_mhz = 80;
|
|
/* no break */
|
|
case 80:
|
|
freq = CPU_80M;
|
|
break;
|
|
}
|
|
rtc_set_cpu_freq(XTAL_AUTO, freq);
|
|
ets_update_cpu_frequency(freq_mhz);
|
|
}
|
|
|