OVMS3-idf/components/esp32/ets_timer_legacy.c
Angus Gratton 094cf4d79d wifi/bt coexistence: Fix disabled cache access race when writing to flash
Moves the ets_timer_arm() / ets_timer_disarm() code paths to RAM

Overhead is 740 bytes of IRAM, 0 bytes DRAM

(For comparison: If all of esp_timer.c is moved to RAM, overhead is 1068 bytes IRAM and 480 bytes DRAM.)
2017-10-16 19:47:33 +08:00

126 lines
4 KiB
C

// Copyright 2010-2017 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.
/*
* ets_timer module implements a set of legacy timer APIs which are
* used by the WiFi driver. This is done on top of the newer esp_timer APIs.
* Applications should not use ets_timer functions, as they may change without
* notice.
*/
#include <string.h>
#include "esp_types.h"
#include "esp_log.h"
#include "esp_attr.h"
#include "esp_intr_alloc.h"
#include "rom/ets_sys.h"
#include "soc/frc_timer_reg.h"
#include "freertos/FreeRTOS.h"
#include "freertos/task.h"
#include "freertos/semphr.h"
#include "freertos/xtensa_api.h"
#include "sdkconfig.h"
#include "esp_timer.h"
#include "esp_timer_impl.h"
/* We abuse 'timer_arg' field of ETSTimer structure to hold a pointer to esp_timer */
#define ESP_TIMER(p_ets_timer) ((esp_timer_handle_t) (p_ets_timer)->timer_arg)
/* We abuse 'timer_expire' field of ETSTimer structure to hold a magic value
* signifying that the contents of the timer was zeroed out.
*/
#define TIMER_INITIALIZED_FIELD(p_ets_timer) ((p_ets_timer)->timer_expire)
#define TIMER_INITIALIZED_VAL 0x12121212
static IRAM_ATTR bool timer_initialized(ETSTimer *ptimer)
{
return TIMER_INITIALIZED_FIELD(ptimer) == TIMER_INITIALIZED_VAL;
}
void ets_timer_setfn(ETSTimer *ptimer, ETSTimerFunc *pfunction, void *parg)
{
if (!timer_initialized(ptimer)) {
memset(ptimer, 0, sizeof(*ptimer));
TIMER_INITIALIZED_FIELD(ptimer) = TIMER_INITIALIZED_VAL;
}
if (ESP_TIMER(ptimer) == NULL) {
const esp_timer_create_args_t create_args = {
.callback = pfunction,
.arg = parg,
.name = "ETSTimer",
.dispatch_method = ESP_TIMER_TASK
};
ESP_ERROR_CHECK( esp_timer_create(&create_args, (esp_timer_handle_t*)&(ptimer->timer_arg)) );
}
}
void IRAM_ATTR ets_timer_arm_us(ETSTimer *ptimer, uint32_t time_us, bool repeat_flag)
{
assert(timer_initialized(ptimer));
esp_timer_stop(ESP_TIMER(ptimer)); // no error check
if (!repeat_flag) {
ESP_ERROR_CHECK( esp_timer_start_once(ESP_TIMER(ptimer), time_us) );
} else {
ESP_ERROR_CHECK( esp_timer_start_periodic(ESP_TIMER(ptimer), time_us) );
}
}
void IRAM_ATTR ets_timer_arm(ETSTimer *ptimer, uint32_t time_ms, bool repeat_flag)
{
uint64_t time_us = 1000LL * (uint64_t) time_ms;
assert(timer_initialized(ptimer));
esp_timer_stop(ESP_TIMER(ptimer)); // no error check
if (!repeat_flag) {
ESP_ERROR_CHECK( esp_timer_start_once(ESP_TIMER(ptimer), time_us) );
} else {
ESP_ERROR_CHECK( esp_timer_start_periodic(ESP_TIMER(ptimer), time_us) );
}
}
void ets_timer_done(ETSTimer *ptimer)
{
if (timer_initialized(ptimer)) {
esp_timer_delete(ESP_TIMER(ptimer));
ptimer->timer_arg = NULL;
TIMER_INITIALIZED_FIELD(ptimer) = 0;
}
}
void IRAM_ATTR ets_timer_disarm(ETSTimer *ptimer)
{
if (timer_initialized(ptimer)) {
esp_timer_stop(ESP_TIMER(ptimer));
}
}
void ets_timer_init(void)
{
}
void ets_timer_deinit(void)
{
}
void os_timer_setfn(ETSTimer *ptimer, ETSTimerFunc *pfunction, void *parg) __attribute__((alias("ets_timer_setfn")));
void os_timer_disarm(ETSTimer *ptimer) __attribute__((alias("ets_timer_disarm")));
void os_timer_arm_us(ETSTimer *ptimer,uint32_t u_seconds,bool repeat_flag) __attribute__((alias("ets_timer_arm_us")));
void os_timer_arm(ETSTimer *ptimer,uint32_t milliseconds,bool repeat_flag) __attribute__((alias("ets_timer_arm")));
void os_timer_done(ETSTimer *ptimer) __attribute__((alias("ets_timer_done")));