esp-idf/components/bt/bluedroid/osi/alarm.c

191 lines
4.6 KiB
C

/******************************************************************************
*
* Copyright (C) 2014 Google, Inc.
*
* 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 <stdlib.h>
#include <string.h>
#include <stdbool.h>
#include "bt_defs.h"
#include "bt_trace.h"
#include "alarm.h"
#include "allocator.h"
#include "list.h"
#include "thread.h"
#include "freertos/FreeRTOSConfig.h"
#include "freertos/xtensa_api.h"
#include "rom/ets_sys.h"
#define RTC_TIMER_TICKS_TO_MS(ticks) ((ticks/625)<<1 + (ticks-(ticks/625)*625)/312)
#define BT_ALARM_START_WAIT_TICKS 100
#define BT_ALARM_STOP_WAIT_TICKS 100
#define BT_ALARM_FREE_WAIT_TICKS 100
#define BT_ALARM_CHG_PERIOD_WAIT_TICKS 100
static struct alarm_t alarm_cbs[ALARM_CBS_NUM];
void osi_alarm_init(void)
{
memset(&alarm_cbs[0], 0x00, sizeof(alarm_cbs));
}
static struct alarm_t *alarm_cbs_lookfor_available(void)
{
int i;
for (i = 0; i < ALARM_CBS_NUM; i++) {
if (alarm_cbs[i].alarm_hdl == NULL) { //available
LOG_DEBUG(">>>> %d %08x<<<<\n", i, &alarm_cbs[i]);
return &alarm_cbs[i];
}
}
return NULL;
}
static void alarm_cb_handler(TimerHandle_t xTimer)
{
struct alarm_t *alarm;
if (!xTimer) {
LOG_DEBUG("TimerName: NULL\n");
return;
}
alarm = pvTimerGetTimerID(xTimer);
LOG_DEBUG("TimerID %08x, Name %s\n", alarm, pcTimerGetTimerName(xTimer));
if (alarm->cb) {
alarm->cb(alarm->cb_data);
}
}
osi_alarm_t *osi_alarm_new(char *alarm_name, osi_alarm_callback_t callback, void *data, period_ms_t timer_expire)
{
struct alarm_t *timer_id;
TimerHandle_t t;
if (timer_expire == 0) {
timer_expire = 1000;
}
/* TODO mutex lock */
timer_id = alarm_cbs_lookfor_available();
if (!timer_id) {
LOG_ERROR("%s full\n", __func__);
return NULL;
}
t = xTimerCreate(alarm_name, timer_expire / portTICK_PERIOD_MS, pdFALSE, timer_id, alarm_cb_handler);
if (!t) {
LOG_ERROR("%s error\n", __func__);
return NULL;
}
timer_id->alarm_hdl = t;
timer_id->cb = callback;
timer_id->cb_data = data;
/* TODO mutex unlock */
return timer_id;
}
int osi_alarm_free(osi_alarm_t *alarm)
{
if (!alarm) {
LOG_ERROR("%s null\n", __func__);
return -1;
}
if (xTimerDelete(alarm->alarm_hdl, BT_ALARM_FREE_WAIT_TICKS) != pdPASS) {
LOG_ERROR("%s error\n", __func__);
return -2;
}
/* TODO mutex lock */
memset(alarm, 0x00, sizeof(osi_alarm_t));
/* TODO mutex unlock */
return 0;
}
int osi_alarm_set(osi_alarm_t *alarm, period_ms_t timeout)
{
if (!alarm) {
LOG_ERROR("%s null\n", __func__);
return -1;
}
if (xTimerChangePeriod(alarm->alarm_hdl, timeout / portTICK_PERIOD_MS, BT_ALARM_CHG_PERIOD_WAIT_TICKS) != pdPASS) {
LOG_ERROR("%s chg period error\n", __func__);
return -2;
}
if (xTimerStart(alarm->alarm_hdl, BT_ALARM_START_WAIT_TICKS) != pdPASS) {
LOG_ERROR("%s start error\n", __func__);
return -3;
}
return 0;
}
int osi_alarm_cancel(osi_alarm_t *alarm)
{
if (!alarm) {
LOG_ERROR("%s null\n", __func__);
return -1;
}
if (xTimerStop(alarm->alarm_hdl, BT_ALARM_STOP_WAIT_TICKS) != pdPASS) {
LOG_ERROR("%s error\n", __func__);
return -2;
}
return 0;
}
static uint32_t alarm_current_tick(void)
{
return xTaskGetTickCount();
}
// todo: this is not accurate
// max return value: 0xffffffff / 312 = 13765920 = 0xD20D20
period_ms_t osi_alarm_now(void)
{
return RTC_TIMER_TICKS_TO_MS((alarm_current_tick()));
}
period_ms_t osi_alarm_get_remaining_ms(const osi_alarm_t *alarm)
{
/* TODO: use FreeRTOS timer.c implement ??? */
return 0xffffffff;
}
// pre-condition: 0 <= t1, t2 <= 0xD20D20
// return value: 0<= ret <=0XD20D20
period_ms_t osi_alarm_time_diff(period_ms_t t1, period_ms_t t2)
{
#define MAX_ALARM_TIME_MS (0xD20D20)
int32_t diff = (int32_t)(t1) - (int32_t)(t2);
if (diff < 0) {
diff += MAX_ALARM_TIME_MS;
}
return (period_ms_t)diff;
}