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risc-v/espressif: Add High Resolution Timer driver

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Signed-off-by: Gustavo Henrique Nihei <gustavo.nihei@espressif.com>
This commit is contained in:
Gustavo Henrique Nihei 2023-03-29 16:12:14 -03:00 committed by Alan Carvalho de Assis
parent 6a799fef6c
commit ffef83c9a1
7 changed files with 1017 additions and 0 deletions
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29
arch/risc-v/src/espressif/Kconfig
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@ -213,6 +213,15 @@ config ESPRESSIF_UART1
select UART1_SERIALDRIVER
select ARCH_HAVE_SERIAL_TERMIOS
config ESPRESSIF_HR_TIMER
bool "High-Resolution Timer"
default n
---help---
A high-resolution hardware timer for supporting the management of
kernel events.
The HR Timer is built on top of the System Timer (SYSTIMER) peripheral.
Timer callbacks are dispatched from a high-priority kernel task.
config ESPRESSIF_BROWNOUT_DET
bool "Brownout Detector"
default y
@ -352,6 +361,26 @@ endchoice # ESPRESSIF_FLASH_FREQ
endmenu # SPI Flash Configuration
menu "High Resolution Timer"
depends on ESPRESSIF_HR_TIMER
config ESPRESSIF_HR_TIMER_TASK_NAME
string "High Resolution Timer task name"
default "hr_timer"
config ESPRESSIF_HR_TIMER_TASK_PRIORITY
int "High Resolution Timer task priority"
default 223
---help---
Priority level of the High Resolution Timer task.
Must be lower than the SCHED_HPWORKPRIORITY.
config ESPRESSIF_HR_TIMER_TASK_STACK_SIZE
int "High Resolution Timer task stack size"
default 2048
endmenu # High Resolution Timer
menu "Application Image Configuration"
config ESPRESSIF_PARTITION_TABLE_OFFSET

4
arch/risc-v/src/espressif/Make.defs
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@ -46,6 +46,10 @@ ifneq ($(CONFIG_DEV_RANDOM)$(CONFIG_DEV_URANDOM_ARCH),)
CHIP_CSRCS += esp_random.c
endif
ifeq ($(CONFIG_ESPRESSIF_HR_TIMER),y)
CHIP_CSRCS += esp_hr_timer.c
endif
#############################################################################
# Espressif HAL for 3rd Party Platforms
#############################################################################

716
arch/risc-v/src/espressif/esp_hr_timer.c Normal file
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@ -0,0 +1,716 @@
/****************************************************************************
* arch/risc-v/src/espressif/esp_hr_timer.c
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this args for additional information regarding copyright ownership. The
* ASF licenses this file to you 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.
*
****************************************************************************/
/****************************************************************************
* Included Files
****************************************************************************/
#include <nuttx/config.h>
#include <assert.h>
#include <debug.h>
#include <errno.h>
#include <fcntl.h>
#include <stdbool.h>
#include <stdint.h>
#include <string.h>
#include <sys/types.h>
#include <nuttx/irq.h>
#include <nuttx/kmalloc.h>
#include <nuttx/kthread.h>
#include <nuttx/semaphore.h>
#include "esp_irq.h"
#include "esp_hr_timer.h"
#include "esp_attr.h"
#include "hal/systimer_hal.h"
#include "hal/systimer_ll.h"
#include "periph_ctrl.h"
#include "systimer.h"
/****************************************************************************
* Pre-processor Definitions
****************************************************************************/
#if SOC_SYSTIMER_INT_LEVEL
# define SYSTIMER_TRIGGER_TYPE ESP_IRQ_TRIGGER_LEVEL
#else
# define SYSTIMER_TRIGGER_TYPE ESP_IRQ_TRIGGER_EDGE
#endif /* SOC_SYSTIMER_INT_LEVEL */
#ifdef CONFIG_SCHED_HPWORK
static_assert(CONFIG_ESPRESSIF_HR_TIMER_TASK_PRIORITY <
CONFIG_SCHED_HPWORKPRIORITY,
"High Resolution Timer task priority should be smaller than"
" High priority worker thread");
#endif
/****************************************************************************
* Private Types
****************************************************************************/
struct esp_hr_timer_context_s
{
pid_t pid;
sem_t toutsem;
struct list_node runlist;
struct list_node toutlist;
systimer_hal_context_t hal;
};
/****************************************************************************
* Private Function Prototypes
****************************************************************************/
static int esp_hr_timer_thread(int argc, char *argv[]);
static int esp_hr_timer_isr(int irq, void *context, void *arg);
/****************************************************************************
* Private Data
****************************************************************************/
static struct esp_hr_timer_context_s g_hr_timer_context =
{
.pid = INVALID_PROCESS_ID,
.toutsem = SEM_INITIALIZER(0),
};
/****************************************************************************
* Private Functions
****************************************************************************/
/****************************************************************************
* Name: esp_hr_timer_thread
*
* Description:
* HR Timer working thread: Waits for a timeout semaphore, scans
* the timeout list and processes all the timers in the list.
*
* Input Parameters:
* argc - Not used.
* argv - Not used.
*
* Returned Value:
* Zero (OK) is returned on success; a negated errno value is returned on
* any failure.
*
****************************************************************************/
static int esp_hr_timer_thread(int argc, char *argv[])
{
struct esp_hr_timer_context_s *priv = &g_hr_timer_context;
while (true)
{
/* Waiting for all timers to time out */
VERIFY(nxsem_wait_uninterruptible(&priv->toutsem));
irqstate_t flags = enter_critical_section();
/* Process all the timers in list */
while (!list_is_empty(&priv->toutlist))
{
struct esp_hr_timer_s *timer;
enum esp_hr_timer_state_e raw_state;
/* Get the first timer in the list */
timer = container_of(priv->toutlist.next,
struct esp_hr_timer_s, list);
/* Cache the raw state to decide how to deal with this timer */
raw_state = timer->state;
/* Delete the timer from the list */
list_delete(&timer->list);
/* Set timer's state to idle so it can be restarted by the user. */
timer->state = HR_TIMER_IDLE;
leave_critical_section(flags);
if (raw_state == HR_TIMER_TIMEOUT)
{
timer->callback(timer->arg);
}
else if (raw_state == HR_TIMER_DELETE)
{
kmm_free(timer);
}
/* Enter critical section for next scanning list */
flags = enter_critical_section();
if (raw_state == HR_TIMER_TIMEOUT)
{
/* Check if the timer is in "repeat" mode */
if (timer->flags & HR_TIMER_REPEAT)
{
esp_hr_timer_start(timer, timer->timeout, true);
}
}
}
leave_critical_section(flags);
}
return 0;
}
/****************************************************************************
* Name: esp_hr_timer_isr
*
* Description:
* Handler to be executed by the Systimer ISR.
*
* Input Parameters:
* irq - IRQ associated to that interrupt.
* context - Interrupt register state save info.
* arg - A pointer to the argument provided when the interrupt
* was registered.
*
* Returned Value:
* Zero (OK) is returned on success; a negated errno value is returned on
* any failure.
*
****************************************************************************/
static int IRAM_ATTR esp_hr_timer_isr(int irq, void *context, void *arg)
{
struct esp_hr_timer_context_s *priv = &g_hr_timer_context;
bool wake = false;
irqstate_t flags;
/* Clear interrupt register status */
systimer_ll_clear_alarm_int(priv->hal.dev, SYSTIMER_ALARM_ESPTIMER);
flags = enter_critical_section();
/* Check if there is a timer running */
if (!list_is_empty(&priv->runlist))
{
struct esp_hr_timer_s *timer;
uint64_t counter;
/* When stop/delete timer, in the same time the hardware timer
* interrupt triggers, function "stop/delete" remove the timer
* from running list, so the 1st timer is not which triggers.
*/
timer = container_of(priv->runlist.next, struct esp_hr_timer_s, list);
counter = systimer_hal_get_time(&priv->hal, SYSTIMER_COUNTER_ESPTIMER);
if (timer->alarm <= counter)
{
/* Remove the first timer from the running list and add it to
* the timeout list.
*
* Set the timer's state to be HR_TIMER_TIMEOUT to avoid
* other operations.
*/
list_delete(&timer->list);
timer->state = HR_TIMER_TIMEOUT;
list_add_after(&priv->toutlist, &timer->list);
wake = true;
/* Check if there is a timer running */
if (!list_is_empty(&priv->runlist))
{
/* Reset hardware timer alarm with next timer's alarm value */
timer = container_of(priv->runlist.next,
struct esp_hr_timer_s, list);
systimer_counter_value_t systimer_alarm =
{
.val = priv->hal.us_to_ticks(timer->alarm),
};
systimer_ll_enable_alarm(priv->hal.dev,
SYSTIMER_ALARM_ESPTIMER, false);
systimer_ll_set_alarm_target(priv->hal.dev,
SYSTIMER_ALARM_ESPTIMER,
systimer_alarm.val);
systimer_ll_apply_alarm_value(priv->hal.dev,
SYSTIMER_ALARM_ESPTIMER);
}
}
/* If there is a timer in the list, the alarm should be enabled */
systimer_ll_enable_alarm(priv->hal.dev, SYSTIMER_ALARM_ESPTIMER, true);
}
if (wake)
{
/* Wake up the thread to process timed-out timers */
int ret = nxsem_post(&priv->toutsem);
if (ret < 0)
{
tmrerr("Failed to post sem ret=%d\n", ret);
}
}
leave_critical_section(flags);
return OK;
}
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: esp_hr_timer_create
*
* Description:
* Create a High Resolution Timer from the provided arguments.
*
* Input Parameters:
* args - HR Timer creation arguments.
*
* Output Parameters:
* timer_handle - HR Timer handle pointer.
*
* Returned Value:
* Zero (OK) is returned on success; a negated errno value is returned on
* any failure.
*
****************************************************************************/
int esp_hr_timer_create(const struct esp_hr_timer_args_s *args,
struct esp_hr_timer_s **timer_handle)
{
struct esp_hr_timer_s *timer;
timer = (struct esp_hr_timer_s *)kmm_malloc(sizeof(*timer));
if (timer == NULL)
{
tmrerr("Failed to allocate %d bytes\n", sizeof(*timer));
return -ENOMEM;
}
timer->callback = args->callback;
timer->arg = args->arg;
timer->flags = HR_TIMER_NOFLAGS;
timer->state = HR_TIMER_IDLE;
list_initialize(&timer->list);
*timer_handle = timer;
return OK;
}
/****************************************************************************
* Name: esp_hr_timer_start
*
* Description:
* Start the High Resolution Timer.
*
* Input Parameters:
* timer - HR Timer pointer.
* timeout - Timeout value.
* repeat - Repeat mode (true: enabled, false: disabled).
*
* Returned Value:
* None.
*
****************************************************************************/
void esp_hr_timer_start(struct esp_hr_timer_s *timer,
uint64_t timeout,
bool repeat)
{
struct esp_hr_timer_context_s *priv = &g_hr_timer_context;
bool inserted = false;
uint64_t counter;
struct esp_hr_timer_s *p;
irqstate_t flags = enter_critical_section();
/* Only idle timer can be started */
if (timer->state != HR_TIMER_IDLE)
{
esp_hr_timer_stop(timer);
}
/* Calculate the timer's alarm value */
counter = systimer_hal_get_time(&priv->hal, SYSTIMER_COUNTER_ESPTIMER);
timer->timeout = timeout;
timer->alarm = timer->timeout + counter;
if (repeat)
{
timer->flags |= HR_TIMER_REPEAT;
}
else
{
timer->flags &= ~HR_TIMER_REPEAT;
}
/* Scan the timer list and insert the new timer into previous
* node of timer whose alarm value is larger than new one
*/
list_for_every_entry(&priv->runlist, p, struct esp_hr_timer_s, list)
{
if (p->alarm > timer->alarm)
{
list_add_before(&p->list, &timer->list);
inserted = true;
break;
}
}
/* If we didn't find a larger one, insert the new timer at the tail
* of the list.
*/
if (!inserted)
{
list_add_tail(&priv->runlist, &timer->list);
}
timer->state = HR_TIMER_READY;
/* If this timer is at the head of the list */
if (timer == container_of(priv->runlist.next,
struct esp_hr_timer_s, list))
{
/* Reset the hardware timer alarm */
systimer_hal_set_alarm_target(&priv->hal, SYSTIMER_ALARM_ESPTIMER,
timer->alarm);
}
leave_critical_section(flags);
}
/****************************************************************************
* Name: esp_hr_timer_stop
*
* Description:
* Stop the High Resolution Timer.
*
* Input Parameters:
* timer - HR Timer pointer.
*
* Returned Value:
* None.
*
****************************************************************************/
void esp_hr_timer_stop(struct esp_hr_timer_s *timer)
{
struct esp_hr_timer_context_s *priv = &g_hr_timer_context;
irqstate_t flags = enter_critical_section();
/* "start" function can set the timer's repeat flag, and "stop" function
* should remove this flag.
*/
timer->flags &= ~HR_TIMER_REPEAT;
/* Only timers in "ready" state can be stopped */
if (timer->state == HR_TIMER_READY)
{
bool ishead;
/* Check if the timer is at the head of the list */
if (timer == container_of(priv->runlist.next,
struct esp_hr_timer_s, list))
{
ishead = true;
}
else
{
ishead = false;
}
list_delete(&timer->list);
timer->state = HR_TIMER_IDLE;
/* If the timer is at the head of the list */
if (ishead)
{
if (!list_is_empty(&priv->runlist))
{
struct esp_hr_timer_s *next_timer;
/* Set the value from the next timer as the new hardware timer
* alarm value.
*/
next_timer = container_of(priv->runlist.next,
struct esp_hr_timer_s,
list);
systimer_hal_set_alarm_target(&priv->hal,
SYSTIMER_ALARM_ESPTIMER,
next_timer->alarm);
}
}
}
leave_critical_section(flags);
}
/****************************************************************************
* Name: esp_hr_timer_delete
*
* Description:
* Stop and delete the High Resolution Timer.
*
* Input Parameters:
* timer - HR Timer pointer.
*
* Returned Value:
* None.
*
****************************************************************************/
void esp_hr_timer_delete(struct esp_hr_timer_s *timer)
{
int ret;
irqstate_t flags;
struct esp_hr_timer_context_s *priv = &g_hr_timer_context;
flags = enter_critical_section();
if (timer->state == HR_TIMER_READY)
{
esp_hr_timer_stop(timer);
}
else if (timer->state == HR_TIMER_TIMEOUT)
{
list_delete(&timer->list);
}
else if (timer->state == HR_TIMER_DELETE)
{
goto exit;
}
list_add_after(&priv->toutlist, &timer->list);
timer->state = HR_TIMER_DELETE;
/* Wake up the thread to process deleted timers */
ret = nxsem_post(&priv->toutsem);
if (ret < 0)
{
tmrerr("Failed to post sem ret=%d\n", ret);
}
exit:
leave_critical_section(flags);
}
/****************************************************************************
* Name: esp_hr_timer_time_us
*
* Description:
* Get time of the High Resolution Timer in microseconds.
*
* Input Parameters:
* None.
*
* Returned Value:
* Time of the HR Timer in microseconds.
*
****************************************************************************/
uint64_t IRAM_ATTR esp_hr_timer_time_us(void)
{
struct esp_hr_timer_context_s *priv = &g_hr_timer_context;
return systimer_hal_get_time(&priv->hal, SYSTIMER_COUNTER_ESPTIMER);
}
/****************************************************************************
* Name: esp_hr_timer_get_alarm
*
* Description:
* Get the timestamp when the next timeout is expected to occur.
*
* Input Parameters:
* None.
*
* Returned Value:
* Timestamp of the nearest timer event in microseconds.
*
****************************************************************************/
uint64_t IRAM_ATTR esp_hr_timer_get_alarm(void)
{
struct esp_hr_timer_context_s *priv = &g_hr_timer_context;
uint64_t counter;
uint64_t alarm_value;
irqstate_t flags = enter_critical_section();
counter = systimer_hal_get_time(&priv->hal, SYSTIMER_COUNTER_ESPTIMER);
alarm_value = systimer_hal_get_alarm_value(&priv->hal,
SYSTIMER_ALARM_ESPTIMER);
alarm_value = priv->hal.ticks_to_us(alarm_value);
if (alarm_value <= counter)
{
alarm_value = 0;
}
else
{
alarm_value -= counter;
}
leave_critical_section(flags);
return alarm_value;
}
/****************************************************************************
* Name: esp_hr_timer_calibration
*
* Description:
* Adjust current High Resolution Timer by a certain value.
*
* Input Parameters:
* time_us - Adjustment to apply to the HR Timer in microseconds.
*
* Returned Value:
* None.
*
****************************************************************************/
void IRAM_ATTR esp_hr_timer_calibration(uint64_t time_us)
{
struct esp_hr_timer_context_s *priv = &g_hr_timer_context;
irqstate_t flags = enter_critical_section();
systimer_hal_counter_value_advance(&priv->hal, SYSTIMER_COUNTER_ESPTIMER,
time_us);
leave_critical_section(flags);
}
/****************************************************************************
* Name: esp_hr_timer_init
*
* Description:
* Initialize High Resolution Timer.
*
* Input Parameters:
* None.
*
* Returned Value:
* Zero (OK) is returned on success; a negated errno value is returned on
* any failure.
*
****************************************************************************/
int esp_hr_timer_init(void)
{
struct esp_hr_timer_context_s *priv = &g_hr_timer_context;
int pid = kthread_create(CONFIG_ESPRESSIF_HR_TIMER_TASK_NAME,
CONFIG_ESPRESSIF_HR_TIMER_TASK_PRIORITY,
CONFIG_ESPRESSIF_HR_TIMER_TASK_STACK_SIZE,
esp_hr_timer_thread,
NULL);
if (pid < 0)
{
tmrerr("Failed to create HR Timer task=%d\n", pid);
return pid;
}
list_initialize(&priv->runlist);
list_initialize(&priv->toutlist);
priv->pid = (pid_t)pid;
{
irqstate_t flags = enter_critical_section();
periph_module_enable(PERIPH_SYSTIMER_MODULE);
systimer_hal_init(&priv->hal);
systimer_hal_tick_rate_ops_t ops =
{
.ticks_to_us = systimer_ticks_to_us,
.us_to_ticks = systimer_us_to_ticks,
};
systimer_hal_set_tick_rate_ops(&priv->hal, &ops);
systimer_ll_set_counter_value(priv->hal.dev,
SYSTIMER_COUNTER_ESPTIMER,
0);
systimer_ll_apply_counter_value(priv->hal.dev,
SYSTIMER_COUNTER_ESPTIMER);
#if !SOC_SYSTIMER_FIXED_DIVIDER
ASSERT(esp_clk_xtal_freq() == (40 * 1000000));
systimer_hal_set_steps_per_tick(&priv->hal, 0, 2); /* For XTAL */
systimer_hal_set_steps_per_tick(&priv->hal, 1, 1); /* For PLL */
#endif
systimer_hal_enable_alarm_int(&priv->hal, SYSTIMER_ALARM_ESPTIMER);
systimer_hal_enable_counter(&priv->hal, SYSTIMER_COUNTER_ESPTIMER);
systimer_hal_select_alarm_mode(&priv->hal, SYSTIMER_ALARM_ESPTIMER,
SYSTIMER_ALARM_MODE_ONESHOT);
systimer_hal_connect_alarm_counter(&priv->hal, SYSTIMER_ALARM_ESPTIMER,
SYSTIMER_COUNTER_ESPTIMER);
leave_critical_section(flags);
}
esp_setup_irq(SYSTIMER_TARGET2_EDGE_INTR_SOURCE,
ESP_IRQ_PRIORITY_DEFAULT,
SYSTIMER_TRIGGER_TYPE);
/* Attach the systimer interrupt */
irq_attach(ESP_IRQ_SYSTIMER_TARGET2_EDGE, (xcpt_t)esp_hr_timer_isr, NULL);
/* Enable the allocated CPU interrupt */
up_enable_irq(ESP_IRQ_SYSTIMER_TARGET2_EDGE);
return 0;
}

232
arch/risc-v/src/espressif/esp_hr_timer.h Normal file
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@ -0,0 +1,232 @@
/****************************************************************************
* arch/risc-v/src/espressif/esp_hr_timer.h
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership. The
* ASF licenses this file to you 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.
*
****************************************************************************/
#ifndef __ARCH_RISCV_SRC_ESPRESSIF_ESP_HR_TIMER_H
#define __ARCH_RISCV_SRC_ESPRESSIF_ESP_HR_TIMER_H
/****************************************************************************
* Included Files
****************************************************************************/
#include <nuttx/config.h>
#include <stdint.h>
#include <nuttx/list.h>
/****************************************************************************
* Pre-processor Definitions
****************************************************************************/
#define HR_TIMER_NOFLAGS (0) /* Timer supports no feature */
#define HR_TIMER_REPEAT (1 << 0) /* Timer supports repeat mode */
/****************************************************************************
* Public Types
****************************************************************************/
/* HR Timer state */
enum esp_hr_timer_state_e
{
HR_TIMER_IDLE, /* Timer is not counting */
HR_TIMER_READY, /* Timer is counting */
HR_TIMER_TIMEOUT, /* Timer timed out */
HR_TIMER_DELETE /* Timer is to be delete */
};
/* HR Timer data structure */
struct esp_hr_timer_s
{
uint64_t timeout; /* Timeout value */
uint64_t alarm; /* Timeout period */
void (*callback)(void *arg); /* Callback function */
void *arg; /* Private data */
uint16_t flags; /* Supported features */
enum esp_hr_timer_state_e state; /* Timer state */
struct list_node list; /* Working list */
};
/* HR Timer creation arguments data structure */
struct esp_hr_timer_args_s
{
void (*callback)(void *arg); /* Callback function */
void *arg; /* Private data */
};
#undef EXTERN
#if defined(__cplusplus)
#define EXTERN extern "C"
extern "C"
{
#else
#define EXTERN extern
#endif
/****************************************************************************
* Public Function Prototypes
****************************************************************************/
/****************************************************************************
* Name: esp_hr_timer_create
*
* Description:
* Create a High Resolution Timer from the provided arguments.
*
* Input Parameters:
* args - HR Timer creation arguments.
*
* Output Parameters:
* timer_handle - HR Timer handle pointer.
*
* Returned Value:
* Zero (OK) is returned on success; a negated errno value is returned on
* any failure.
*
****************************************************************************/
int esp_hr_timer_create(const struct esp_hr_timer_args_s *args,
struct esp_hr_timer_s **timer_handle);
/****************************************************************************
* Name: esp_hr_timer_start
*
* Description:
* Start the High Resolution Timer.
*
* Input Parameters:
* timer - HR Timer pointer.
* timeout - Timeout value.
* repeat - Repeat mode (true: enabled, false: disabled).
*
* Returned Value:
* None.
*
****************************************************************************/
void esp_hr_timer_start(struct esp_hr_timer_s *timer,
uint64_t timeout,
bool repeat);
/****************************************************************************
* Name: esp_hr_timer_stop
*
* Description:
* Stop the High Resolution Timer.
*
* Input Parameters:
* timer - HR Timer pointer.
*
* Returned Value:
* None.
*
****************************************************************************/
void esp_hr_timer_stop(struct esp_hr_timer_s *timer);
/****************************************************************************
* Name: esp_hr_timer_delete
*
* Description:
* Stop and delete the High Resolution Timer.
*
* Input Parameters:
* timer - HR Timer pointer.
*
* Returned Value:
* None.
*
****************************************************************************/
void esp_hr_timer_delete(struct esp_hr_timer_s *timer);
/****************************************************************************
* Name: esp_hr_timer_time_us
*
* Description:
* Get time of the High Resolution Timer in microseconds.
*
* Input Parameters:
* None.
*
* Returned Value:
* Time of the HR Timer in microseconds.
*
****************************************************************************/
uint64_t esp_hr_timer_time_us(void);
/****************************************************************************
* Name: esp_hr_timer_get_alarm
*
* Description:
* Get the timestamp when the next timeout is expected to occur.
*
* Input Parameters:
* None.
*
* Returned Value:
* Timestamp of the nearest timer event in microseconds.
*
****************************************************************************/
uint64_t esp_hr_timer_get_alarm(void);
/****************************************************************************
* Name: esp_hr_timer_calibration
*
* Description:
* Adjust current High Resolution Timer by a certain value.
*
* Input Parameters:
* time_us - Adjustment to apply to the HR Timer in microseconds.
*
* Returned Value:
* None.
*
****************************************************************************/
void esp_hr_timer_calibration(uint64_t time_us);
/****************************************************************************
* Name: esp_hr_timer_init
*
* Description:
* Initialize High Resolution Timer.
*
* Input Parameters:
* None.
*
* Returned Value:
* Zero (OK) is returned on success; a negated errno value is returned on
* any failure.
*
****************************************************************************/
int esp_hr_timer_init(void);
#ifdef __cplusplus
}
#endif
#undef EXTERN
#endif /* __ARCH_RISCV_SRC_ESPRESSIF_ESP_HR_TIMER_H */

12
boards/risc-v/espressif/esp32c3-generic/src/esp32c3_bringup.c
View File

@ -38,6 +38,10 @@
# include "esp_wdt.h"
#endif
#ifdef CONFIG_ESPRESSIF_HR_TIMER
# include "esp_hr_timer.h"
#endif
#include "esp32c3-generic.h"
/****************************************************************************
@ -101,6 +105,14 @@ int esp_bringup(void)
}
#endif
#ifdef CONFIG_ESPRESSIF_HR_TIMER
ret = esp_hr_timer_init();
if (ret < 0)
{
_err("Failed to initialize HR timer: %d\n", ret);
}
#endif
/* If we got here then perhaps not all initialization was successful, but
* at least enough succeeded to bring-up NSH with perhaps reduced
* capabilities.

12
boards/risc-v/espressif/esp32c6-generic/src/esp32c6_bringup.c
View File

@ -38,6 +38,10 @@
# include "esp_wdt.h"
#endif
#ifdef CONFIG_ESPRESSIF_HR_TIMER
# include "esp_hr_timer.h"
#endif
#include "esp32c6-generic.h"
/****************************************************************************
@ -101,6 +105,14 @@ int esp_bringup(void)
}
#endif
#ifdef CONFIG_ESPRESSIF_HR_TIMER
ret = esp_hr_timer_init();
if (ret < 0)
{
_err("Failed to initialize HR timer: %d\n", ret);
}
#endif
/* If we got here then perhaps not all initialization was successful, but
* at least enough succeeded to bring-up NSH with perhaps reduced
* capabilities.

12
boards/risc-v/espressif/esp32h2-generic/src/esp32h2_bringup.c
View File

@ -38,6 +38,10 @@
# include "esp_wdt.h"
#endif
#ifdef CONFIG_ESPRESSIF_HR_TIMER
# include "esp_hr_timer.h"
#endif
#include "esp32h2-generic.h"
/****************************************************************************
@ -101,6 +105,14 @@ int esp_bringup(void)
}
#endif
#ifdef CONFIG_ESPRESSIF_HR_TIMER
ret = esp_hr_timer_init();
if (ret < 0)
{
_err("Failed to initialize HR timer: %d\n", ret);
}
#endif
/* If we got here then perhaps not all initialization was successful, but
* at least enough succeeded to bring-up NSH with perhaps reduced
* capabilities.