esp32-hal-misc.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 "esp32-hal.h"
#include "sdkconfig.h"
#include "freertos/FreeRTOS.h"
#include "freertos/task.h"
#include "esp_attr.h"

uint32_t IRAM_ATTR micros()
{
    uint32_t ccount;
    __asm__ __volatile__ ( "rsr     %0, ccount" : "=a" (ccount) );
    return ccount / CONFIG_ESP32_DEFAULT_CPU_FREQ_MHZ;
    //return system_get_time();
}

uint32_t IRAM_ATTR millis()
{
    return xTaskGetTickCount() * portTICK_PERIOD_MS;
}

void delay(uint32_t ms)
{
    vTaskDelay(ms / portTICK_PERIOD_MS);
}

void delayMicroseconds(uint32_t us)
{
    if(us) {
        unsigned long endat = micros();
        endat += us;
        while(micros() < endat) {
            NOP();
        }
    }
}