arduino-esp32/cores/esp32/esp32-hal-misc.c

100 lines
2.2 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 "esp32-hal.h"
#include "sdkconfig.h"
#include "freertos/FreeRTOS.h"
#include "freertos/task.h"
#include "esp_attr.h"
#include "nvs_flash.h"
#include <sys/time.h>
void yield()
{
vPortYield();
}
portMUX_TYPE microsMux = portMUX_INITIALIZER_UNLOCKED;
uint32_t IRAM_ATTR micros()
{
static uint32_t lccount = 0;
static uint32_t overflow = 0;
uint32_t ccount;
portENTER_CRITICAL_ISR(&microsMux);
__asm__ __volatile__ ( "rsr %0, ccount" : "=a" (ccount) );
if(ccount < lccount){
overflow += UINT32_MAX / CONFIG_ESP32_DEFAULT_CPU_FREQ_MHZ;
}
lccount = ccount;
portEXIT_CRITICAL_ISR(&microsMux);
return overflow + (ccount / CONFIG_ESP32_DEFAULT_CPU_FREQ_MHZ);
}
uint32_t IRAM_ATTR millis()
{
return xTaskGetTickCount() * portTICK_PERIOD_MS;
}
void delay(uint32_t ms)
{
vTaskDelay(ms / portTICK_PERIOD_MS);
}
void IRAM_ATTR delayMicroseconds(uint32_t us)
{
uint32_t m = micros();
if(us){
uint32_t e = (m + us);
if(m > e){ //overflow
while(micros() > e){
NOP();
}
}
while(micros() < e){
NOP();
}
}
}
void initVariant() __attribute__((weak));
void initVariant() {}
void init() __attribute__((weak));
void init() {}
void initArduino()
{
nvs_flash_init();
init();
initVariant();
}
//used by hal log
const char * IRAM_ATTR pathToFileName(const char * path)
{
size_t i = 0;
size_t pos = 0;
char * p = (char *)path;
while(*p){
i++;
if(*p == '/' || *p == '\\'){
pos = i;
}
p++;
}
return path+pos;
}