141 lines
4.3 KiB
C
141 lines
4.3 KiB
C
// Copyright 2016-2018 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 <esp_types.h>
|
|
#include <stdlib.h>
|
|
#include <ctype.h>
|
|
#include "esp_log.h"
|
|
#include "soc/rtc_periph.h"
|
|
#include "soc/sens_periph.h"
|
|
#include "soc/syscon_periph.h"
|
|
#include "soc/rtc.h"
|
|
#include "soc/periph_defs.h"
|
|
#include "freertos/FreeRTOS.h"
|
|
#include "freertos/xtensa_api.h"
|
|
#include "freertos/semphr.h"
|
|
#include "freertos/timers.h"
|
|
#include "esp_intr_alloc.h"
|
|
#include "sys/lock.h"
|
|
#include "driver/rtc_cntl.h"
|
|
#include "sdkconfig.h"
|
|
#if CONFIG_IDF_TARGET_ESP32
|
|
#include "esp32/rom/ets_sys.h"
|
|
#elif CONFIG_IDF_TARGET_ESP32S2
|
|
#include "esp32s2/rom/ets_sys.h"
|
|
#endif
|
|
|
|
#ifndef NDEBUG
|
|
// Enable built-in checks in queue.h in debug builds
|
|
#define INVARIANTS
|
|
#endif
|
|
#include "sys/queue.h"
|
|
|
|
portMUX_TYPE rtc_spinlock = portMUX_INITIALIZER_UNLOCKED;
|
|
|
|
/*---------------------------------------------------------------
|
|
INTERRUPT HANDLER
|
|
---------------------------------------------------------------*/
|
|
|
|
|
|
typedef struct rtc_isr_handler_ {
|
|
uint32_t mask;
|
|
intr_handler_t handler;
|
|
void* handler_arg;
|
|
SLIST_ENTRY(rtc_isr_handler_) next;
|
|
} rtc_isr_handler_t;
|
|
|
|
static SLIST_HEAD(rtc_isr_handler_list_, rtc_isr_handler_) s_rtc_isr_handler_list =
|
|
SLIST_HEAD_INITIALIZER(s_rtc_isr_handler_list);
|
|
portMUX_TYPE s_rtc_isr_handler_list_lock = portMUX_INITIALIZER_UNLOCKED;
|
|
static intr_handle_t s_rtc_isr_handle;
|
|
|
|
static void rtc_isr(void* arg)
|
|
{
|
|
uint32_t status = REG_READ(RTC_CNTL_INT_ST_REG);
|
|
rtc_isr_handler_t* it;
|
|
portENTER_CRITICAL_ISR(&s_rtc_isr_handler_list_lock);
|
|
SLIST_FOREACH(it, &s_rtc_isr_handler_list, next) {
|
|
if (it->mask & status) {
|
|
portEXIT_CRITICAL_ISR(&s_rtc_isr_handler_list_lock);
|
|
(*it->handler)(it->handler_arg);
|
|
portENTER_CRITICAL_ISR(&s_rtc_isr_handler_list_lock);
|
|
}
|
|
}
|
|
portEXIT_CRITICAL_ISR(&s_rtc_isr_handler_list_lock);
|
|
REG_WRITE(RTC_CNTL_INT_CLR_REG, status);
|
|
}
|
|
|
|
static esp_err_t rtc_isr_ensure_installed(void)
|
|
{
|
|
esp_err_t err = ESP_OK;
|
|
portENTER_CRITICAL(&s_rtc_isr_handler_list_lock);
|
|
if (s_rtc_isr_handle) {
|
|
goto out;
|
|
}
|
|
|
|
REG_WRITE(RTC_CNTL_INT_ENA_REG, 0);
|
|
REG_WRITE(RTC_CNTL_INT_CLR_REG, UINT32_MAX);
|
|
err = esp_intr_alloc(ETS_RTC_CORE_INTR_SOURCE, 0, &rtc_isr, NULL, &s_rtc_isr_handle);
|
|
if (err != ESP_OK) {
|
|
goto out;
|
|
}
|
|
|
|
out:
|
|
portEXIT_CRITICAL(&s_rtc_isr_handler_list_lock);
|
|
return err;
|
|
}
|
|
|
|
|
|
esp_err_t rtc_isr_register(intr_handler_t handler, void* handler_arg, uint32_t rtc_intr_mask)
|
|
{
|
|
esp_err_t err = rtc_isr_ensure_installed();
|
|
if (err != ESP_OK) {
|
|
return err;
|
|
}
|
|
|
|
rtc_isr_handler_t* item = malloc(sizeof(*item));
|
|
if (item == NULL) {
|
|
return ESP_ERR_NO_MEM;
|
|
}
|
|
item->handler = handler;
|
|
item->handler_arg = handler_arg;
|
|
item->mask = rtc_intr_mask;
|
|
portENTER_CRITICAL(&s_rtc_isr_handler_list_lock);
|
|
SLIST_INSERT_HEAD(&s_rtc_isr_handler_list, item, next);
|
|
portEXIT_CRITICAL(&s_rtc_isr_handler_list_lock);
|
|
return ESP_OK;
|
|
}
|
|
|
|
esp_err_t rtc_isr_deregister(intr_handler_t handler, void* handler_arg)
|
|
{
|
|
rtc_isr_handler_t* it;
|
|
rtc_isr_handler_t* prev = NULL;
|
|
bool found = false;
|
|
portENTER_CRITICAL(&s_rtc_isr_handler_list_lock);
|
|
SLIST_FOREACH(it, &s_rtc_isr_handler_list, next) {
|
|
if (it->handler == handler && it->handler_arg == handler_arg) {
|
|
if (it == SLIST_FIRST(&s_rtc_isr_handler_list)) {
|
|
SLIST_REMOVE_HEAD(&s_rtc_isr_handler_list, next);
|
|
} else {
|
|
SLIST_REMOVE_AFTER(prev, next);
|
|
}
|
|
found = true;
|
|
free(it);
|
|
break;
|
|
}
|
|
prev = it;
|
|
}
|
|
portEXIT_CRITICAL(&s_rtc_isr_handler_list_lock);
|
|
return found ? ESP_OK : ESP_ERR_INVALID_STATE;
|
|
}
|