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/*
* Copyright (c) 2006-2023, RT-Thread Development Team
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
* 2023-11-15 BetMul first version
*/
#include "drv_hwtimer.h"
#include <rtthread.h>
#include <rtdevice.h>
#include "driver/gptimer.h"
#include "sdkconfig.h"
#ifdef RT_USING_HWTIMER
/**
* handle interrupt for hwtimer.
*/
static bool mcu_hwtimer_intr_handler(gptimer_handle_t gptimer, const gptimer_alarm_event_data_t *edata, void *user_ctx)
{
rt_interrupt_enter();
rt_hwtimer_t *hwtimer = (rt_hwtimer_t *)user_ctx;
rt_device_hwtimer_isr(hwtimer);
rt_interrupt_leave();
return 0;
}
/**
* init the hwtimer
*/
static void mcu_hwtimer_init(rt_hwtimer_t *timer, rt_uint32_t state)
{
gptimer_handle_t gptimer = (gptimer_handle_t)timer->parent.user_data;
// let the gptimer into enable status
ESP_ERROR_CHECK(gptimer_enable(gptimer));
}
/**
* start the hwtimer, change status into running
*/
static rt_err_t mcu_hwtimer_start(rt_hwtimer_t *timer, rt_uint32_t cnt, rt_hwtimer_mode_t mode)
{
gptimer_handle_t gptimer = (gptimer_handle_t)timer->parent.user_data;
gptimer_alarm_config_t alarm_config = {
.alarm_count = cnt,
};
if (mode == HWTIMER_MODE_ONESHOT)
{
}
else
{
alarm_config.reload_count = 0;
alarm_config.flags.auto_reload_on_alarm = true;
}
ESP_ERROR_CHECK(gptimer_set_alarm_action(gptimer, &alarm_config));
ESP_ERROR_CHECK(gptimer_start(gptimer));
return RT_EOK;
}
/**
* stop the hwtimer, change the status from running into enable
*/
static void mcu_hwtimer_stop(rt_hwtimer_t *timer)
{
gptimer_handle_t gptimer = (gptimer_handle_t)timer->parent.user_data;
ESP_ERROR_CHECK(gptimer_stop(gptimer));
}
/**
* get count
*/
static rt_uint32_t mcu_hwtimer_count_get(rt_hwtimer_t *timer)
{
gptimer_handle_t gptimer = (gptimer_handle_t)timer->parent.user_data;
// get count number
uint64_t value;
ESP_ERROR_CHECK(gptimer_get_raw_count(gptimer, &value));
return (rt_uint32_t)value;
}
/**
* control the hwtimer
*/
static rt_err_t mcu_hwtimer_control(rt_hwtimer_t *timer, rt_uint32_t cmd, void *args)
{
rt_err_t err = RT_EOK;
switch (cmd)
{
case HWTIMER_CTRL_FREQ_SET:
err = -RT_ERROR;
break;
case HWTIMER_CTRL_INFO_GET:
err = -RT_ERROR;
break;
case HWTIMER_CTRL_MODE_SET:
timer->mode = *(rt_uint32_t *)args;
break;
case HWTIMER_CTRL_STOP:
mcu_hwtimer_stop(timer);
break;
}
return err;
}
static struct rt_hwtimer_device _hwtimer;
static const struct rt_hwtimer_ops _hwtimer_ops =
{
.init = mcu_hwtimer_init,
.start = mcu_hwtimer_start,
.stop = mcu_hwtimer_stop,
.count_get = mcu_hwtimer_count_get,
.control = mcu_hwtimer_control};
static const struct rt_hwtimer_info _hwtimer_info =
{
// TODO:what is the true max and min?
.maxfreq = 1000000UL,
.minfreq = 1000000UL,
.maxcnt = 0xFFFF,
.cntmode = HWTIMER_MODE_ONESHOT};
int rt_hw_hwtimer_init(void)
{
char *name = "timer0";
gptimer_handle_t gptimer = NULL;
gptimer_config_t timer_config = {
.clk_src = GPTIMER_CLK_SRC_DEFAULT,
.direction = GPTIMER_COUNT_UP,
.resolution_hz = 1 * 1000 * 1000,
};
gptimer_event_callbacks_t cbs = {
.on_alarm = mcu_hwtimer_intr_handler,
};
ESP_ERROR_CHECK(gptimer_new_timer(&timer_config, &gptimer));
ESP_ERROR_CHECK(gptimer_register_event_callbacks(gptimer, &cbs, &_hwtimer));
_hwtimer.info = &_hwtimer_info;
_hwtimer.ops = &_hwtimer_ops;
return rt_device_hwtimer_register(&_hwtimer, name, (void *)gptimer);
}
INIT_DEVICE_EXPORT(rt_hw_hwtimer_init);
#endif /* RT_USING_HWTIMER */
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