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xtensa/esp32: timer driver refactor

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This commit is contained in:
Sara Souza
2021-03-03 16:32:45 -03:00
committed by Alan Carvalho de Assis
parent d889350822
commit 4ca0c6e3c8
3 changed files with 177 additions and 430 deletions
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arch/xtensa/src/esp32/esp32_tim.c
+69 -269
View File
File diff suppressed because it is too large Load Diff
arch/xtensa/src/esp32/esp32_tim.h
+17 -28
View File
@@ -40,10 +40,8 @@
#define ESP32_TIM_START(d) ((d)->ops->start(d))
#define ESP32_TIM_STOP(d) ((d)->ops->stop(d))
#define ESP32_TIM_CLEAR(d) ((d)->ops->clear(d))
#define ESP32_TIM_CONFIGURE(d, p, m, c, av, a, ar) ((d)->ops->configure(d, m, c, av, a, ar))
#define ESP32_TIM_SETMODE(d, m) ((d)->ops->setmode(d, m))
#define ESP32_TIM_SETPRE(d, p) ((d)->ops->setpre(d, p))
#define ESP32_TIM_GETCONFIG(d, v) ((d)->ops->getconfig(d, v))
#define ESP32_TIM_GETCTR(d, v) ((d)->ops->getcounter(d, v))
#define ESP32_TIM_SETCTR(d, v) ((d)->ops->setcounter(d, v))
#define ESP32_TIM_RLD_NOW(d) ((d)->ops->reloadnow(d))
@@ -54,7 +52,6 @@
#define ESP32_TIM_SETISR(d, hnd, arg) ((d)->ops->setisr(d, hnd, arg))
#define ESP32_TIM_ENABLEINT(d) ((d)->ops->enableint(d))
#define ESP32_TIM_DISABLEINT(d) ((d)->ops->disableint(d))
#define ESP32_TIM_CHECKINT(d) ((d)->ops->checkint(d))
#define ESP32_TIM_ACKINT(d) ((d)->ops->ackint(d))
/****************************************************************************
@@ -84,39 +81,31 @@ struct esp32_tim_ops_s
{
/* Timer tasks */
CODE int (*start)(FAR struct esp32_tim_dev_s *dev);
CODE int (*stop)(FAR struct esp32_tim_dev_s *dev);
CODE int (*clear)(FAR struct esp32_tim_dev_s *dev);
/* Timer configuration */
CODE int (*configure)(FAR struct esp32_tim_dev_s *dev, uint16_t pre,
uint8_t mode, uint64_t counter_value,
uint64_t alarm_value, bool alarm,
bool autoreload);
CODE void (*start)(FAR struct esp32_tim_dev_s *dev);
CODE void (*stop)(FAR struct esp32_tim_dev_s *dev);
CODE void (*clear)(FAR struct esp32_tim_dev_s *dev);
/* Timer operations */
CODE int (*setmode)(FAR struct esp32_tim_dev_s *dev, uint8_t mode);
CODE int (*setpre)(FAR struct esp32_tim_dev_s *dev, uint16_t pre);
CODE int (*getconfig)(FAR struct esp32_tim_dev_s *dev, uint32_t *value);
CODE int (*getcounter)(FAR struct esp32_tim_dev_s *dev, uint64_t *value);
CODE int (*setcounter)(FAR struct esp32_tim_dev_s *dev, uint64_t value);
CODE int (*reloadnow)(FAR struct esp32_tim_dev_s *dev);
CODE int (*getalarmvalue)(FAR struct esp32_tim_dev_s *dev,
CODE void (*setmode)(FAR struct esp32_tim_dev_s *dev, uint8_t mode);
CODE void (*setpre)(FAR struct esp32_tim_dev_s *dev, uint16_t pre);
CODE void (*getcounter)(FAR struct esp32_tim_dev_s *dev, uint64_t *value);
CODE void (*setcounter)(FAR struct esp32_tim_dev_s *dev, uint64_t value);
CODE void (*reloadnow)(FAR struct esp32_tim_dev_s *dev);
CODE void (*getalarmvalue)(FAR struct esp32_tim_dev_s *dev,
uint64_t *value);
CODE int (*setalarmvalue)(FAR struct esp32_tim_dev_s *dev, uint64_t value);
CODE int (*setalarm)(FAR struct esp32_tim_dev_s *dev, bool enable);
CODE int (*setautoreload)(FAR struct esp32_tim_dev_s *dev, bool enable);
CODE void (*setalarmvalue)(FAR struct esp32_tim_dev_s *dev,
uint64_t value);
CODE void (*setalarm)(FAR struct esp32_tim_dev_s *dev, bool enable);
CODE void (*setautoreload)(FAR struct esp32_tim_dev_s *dev, bool enable);
/* Timer interrupts */
CODE int (*setisr)(FAR struct esp32_tim_dev_s *dev, xcpt_t handler,
FAR void * arg);
CODE int (*enableint)(FAR struct esp32_tim_dev_s *dev);
CODE int (*disableint)(FAR struct esp32_tim_dev_s *dev);
CODE int (*checkint)(FAR struct esp32_tim_dev_s *dev);
CODE int (*ackint)(FAR struct esp32_tim_dev_s *dev);
CODE void (*enableint)(FAR struct esp32_tim_dev_s *dev);
CODE void (*disableint)(FAR struct esp32_tim_dev_s *dev);
CODE void (*ackint)(FAR struct esp32_tim_dev_s *dev);
};
/****************************************************************************
@@ -124,7 +113,7 @@ struct esp32_tim_ops_s
****************************************************************************/
FAR struct esp32_tim_dev_s *esp32_tim_init(int timer);
int esp32_tim_deinit(FAR struct esp32_tim_dev_s *dev);
void esp32_tim_deinit(FAR struct esp32_tim_dev_s *dev);
FAR struct esp32_tim_dev_s *esp32_tim0_init(void);
#endif /* __ARCH_XTENSA_SRC_ESP32_ESP32_TIM_H */
arch/xtensa/src/esp32/esp32_tim_lowerhalf.c
+49 -91
View File
@@ -23,19 +23,18 @@
****************************************************************************/
#include <nuttx/config.h>
#include <nuttx/arch.h>
#include <nuttx/timers/timer.h>
#include <sys/types.h>
#include <stdbool.h>
#include <string.h>
#include <errno.h>
#include <debug.h>
#include <stdio.h>
#include <nuttx/arch.h>
#include <nuttx/timers/timer.h>
#include "xtensa.h"
#include "hardware/esp32_soc.h"
#include "esp32_tim.h"
#include "esp32_clockconfig.h"
@@ -45,13 +44,7 @@
/* TIMER configuration */
/* Lowest divider, Highest Frequency Best Resolution */
#define ESP32_TIMER_PRESCALER 2
/* Number of cycles to complete 1 microsecond */
#define ESP32_1USECOND ((esp_clk_apb_freq()/ESP32_TIMER_PRESCALER)/1000000)
#define ESP32_INIT_CNTR_VALUE 0 /* Initial counter value */
#define ESP32_TIMER_MAX_USECOND 0xffffffff
#define ESP32_TIMER_MAX (ESP32_1USECOND*ESP32_TIMER_MAX_USECOND)
/****************************************************************************
* Private Types
@@ -64,6 +57,7 @@ struct esp32_timer_lowerhalf_s
tccb_t callback; /* Current user interrupt callback */
FAR void *arg; /* Argument passed to upper half callback */
bool started; /* True: Timer has been started */
void *upper; /* Pointer to watchdog_upperhalf_s */
};
/****************************************************************************
@@ -160,15 +154,13 @@ static int esp32_timer_handler(int irq, void *context, void *arg)
(FAR struct esp32_timer_lowerhalf_s *)arg;
uint32_t next_interval_us = 0;
/* Clear Interrupt Bits */
if (priv->callback(&next_interval_us, priv->arg))
if (priv->callback(&next_interval_us, priv->upper))
{
if (next_interval_us > 0)
{
/* Set a value to the alarm */
ESP32_TIM_SETALRVL(priv->tim, next_interval_us*ESP32_1USECOND);
ESP32_TIM_SETALRVL(priv->tim, next_interval_us);
}
}
else
@@ -177,7 +169,6 @@ static int esp32_timer_handler(int irq, void *context, void *arg)
}
ESP32_TIM_SETALRM(priv->tim, true); /* Re-enables the alarm */
ESP32_TIM_CLEAR(priv->tim); /* Reset the counter */
ESP32_TIM_ACKINT(priv->tim); /* Clear the Interrupt */
return OK;
}
@@ -202,6 +193,7 @@ static int esp32_timer_start(FAR struct timer_lowerhalf_s *lower)
FAR struct esp32_timer_lowerhalf_s *priv =
(FAR struct esp32_timer_lowerhalf_s *)lower;
int ret = OK;
uint16_t pre;
irqstate_t flags;
DEBUGASSERT(priv);
@@ -218,43 +210,33 @@ static int esp32_timer_start(FAR struct timer_lowerhalf_s *lower)
* unpredictable results, so it is disabled before configuring
*/
ret = ESP32_TIM_STOP(priv->tim);
if (ret != OK)
{
goto errout;
}
ESP32_TIM_STOP(priv->tim);
/* Calculate the suitable prescaler according to the current apb
* frequency to generate a period of 1 us.
*/
pre = esp_clk_apb_freq() / 1000000;
/* Configure TIMER prescaler */
ret = ESP32_TIM_SETPRE(priv->tim, ESP32_TIMER_PRESCALER);
if (ret != OK)
{
goto errout;
}
ESP32_TIM_SETPRE(priv->tim, pre);
/* Configure TIMER mode */
ret = ESP32_TIM_SETMODE(priv->tim, ESP32_TIM_MODE_UP);
if (ret != OK)
{
goto errout;
}
ESP32_TIM_SETMODE(priv->tim, ESP32_TIM_MODE_UP);
/* Clear TIMER counter value */
ret = ESP32_TIM_CLEAR(priv->tim);
if (ret != OK)
{
goto errout;
}
ESP32_TIM_CLEAR(priv->tim);
/* Enable autoreload */
ESP32_TIM_SETARLD(priv->tim, true);
/* Enable TIMER alarm */
ret = ESP32_TIM_SETALRM(priv->tim, true);
if (ret != OK)
{
goto errout;
}
ESP32_TIM_SETALRM(priv->tim, true);
/* Clear Interrupt Bits Status */
@@ -265,21 +247,19 @@ static int esp32_timer_start(FAR struct timer_lowerhalf_s *lower)
if (priv->callback != NULL)
{
flags = enter_critical_section();
ESP32_TIM_SETISR(priv->tim, esp32_timer_handler, priv);
ESP32_TIM_ENABLEINT(priv->tim);
ret = ESP32_TIM_SETISR(priv->tim, esp32_timer_handler, priv);
leave_critical_section(flags);
}
/* Finally, start the TIMER */
ret = ESP32_TIM_START(priv->tim);
if (ret != OK)
{
goto errout;
}
ESP32_TIM_ENABLEINT(priv->tim);
}
/* Finally, start the TIMER */
ESP32_TIM_START(priv->tim);
priv->started = true;
errout:
@@ -306,6 +286,7 @@ static int esp32_timer_stop(FAR struct timer_lowerhalf_s *lower)
FAR struct esp32_timer_lowerhalf_s *priv =
(FAR struct esp32_timer_lowerhalf_s *)lower;
int ret = OK;
irqstate_t flags;
DEBUGASSERT(priv);
@@ -318,7 +299,9 @@ static int esp32_timer_stop(FAR struct timer_lowerhalf_s *lower)
}
ESP32_TIM_DISABLEINT(priv->tim);
ESP32_TIM_SETISR(priv->tim, NULL, NULL);
flags = enter_critical_section();
ret = ESP32_TIM_SETISR(priv->tim, NULL, NULL);
leave_critical_section(flags);
ESP32_TIM_STOP(priv->tim);
priv->started = false;
@@ -378,25 +361,15 @@ static int esp32_timer_getstatus(FAR struct timer_lowerhalf_s *lower,
/* Get the current counter value */
ret = ESP32_TIM_GETCTR(priv->tim, &current_counter_value);
if (ret != OK)
{
goto errout;
}
ESP32_TIM_GETCTR(priv->tim, &current_counter_value);
/* Get the current configured timeout */
ret = ESP32_TIM_GETALRVL(priv->tim, &alarm_value);
if (ret != OK)
{
goto errout;
}
ESP32_TIM_GETALRVL(priv->tim, &alarm_value);
status->timeout = (uint32_t)(alarm_value / ESP32_1USECOND);
status->timeleft = (uint32_t)((alarm_value - current_counter_value)
/ ESP32_1USECOND);
status->timeout = (uint32_t)(alarm_value);
status->timeleft = (uint32_t)((alarm_value - current_counter_value));
errout:
return ret;
}
@@ -422,30 +395,13 @@ static int esp32_timer_settimeout(FAR struct timer_lowerhalf_s *lower,
FAR struct esp32_timer_lowerhalf_s *priv =
(FAR struct esp32_timer_lowerhalf_s *)lower;
int ret = OK;
uint64_t timeout_64;
DEBUGASSERT(priv);
/* Verify if it is already running (set timeout must be called
* before start)
*/
if (priv->started == true)
{
ret = -EPERM;
goto errout;
}
/* Set the timeout */
timeout_64 = timeout*ESP32_1USECOND;
ret = ESP32_TIM_SETALRVL(priv->tim, timeout_64);
if (ret != OK)
{
goto errout;
}
ESP32_TIM_SETALRVL(priv->tim, (uint64_t)timeout);
errout:
return ret;
}
@@ -468,7 +424,7 @@ errout:
static int esp32_timer_maxtimeout(FAR struct timer_lowerhalf_s *lower,
uint32_t *max_timeout)
{
DEBUGASSERT(priv);
DEBUGASSERT(max_timeout);
*max_timeout = ESP32_TIMER_MAX_USECOND;
@@ -501,30 +457,32 @@ static void esp32_timer_setcallback(FAR struct timer_lowerhalf_s *lower,
FAR struct esp32_timer_lowerhalf_s *priv =
(FAR struct esp32_timer_lowerhalf_s *)lower;
irqstate_t flags;
int ret = OK;
DEBUGASSERT(priv);
flags = enter_critical_section();
/* Save the new callback */
priv->callback = callback;
priv->arg = arg;
flags = enter_critical_section();
/* There is a user callback and the timer has already been started */
if (callback != NULL && priv->started == true)
{
ESP32_TIM_SETISR(priv->tim, esp32_timer_handler, priv);
ret = ESP32_TIM_SETISR(priv->tim, esp32_timer_handler, priv);
ESP32_TIM_ENABLEINT(priv->tim);
}
else
{
ESP32_TIM_DISABLEINT(priv->tim);
ESP32_TIM_SETISR(priv->tim, NULL, NULL);
ret = ESP32_TIM_SETISR(priv->tim, NULL, NULL);
}
leave_critical_section(flags);
assert(ret == OK);
}
/****************************************************************************
@@ -552,7 +510,6 @@ static void esp32_timer_setcallback(FAR struct timer_lowerhalf_s *lower,
int esp32_timer_initialize(FAR const char *devpath, uint8_t timer)
{
struct esp32_timer_lowerhalf_s *lower = NULL;
FAR void *drvr = NULL;
int ret = OK;
DEBUGASSERT(devpath);
@@ -623,8 +580,9 @@ int esp32_timer_initialize(FAR const char *devpath, uint8_t timer)
* REVISIT: The returned handle is discarded here.
*/
drvr = timer_register(devpath, (FAR struct timer_lowerhalf_s *)lower);
if (drvr == NULL)
lower->upper = timer_register(devpath,
(FAR struct timer_lowerhalf_s *)lower);
if (lower->upper == NULL)
{
/* The actual cause of the failure may have been a failure to allocate
* perhaps a failure to register the timer driver (such as if the