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risc-v/esp32-c3: Adds freerun wrapper
This commit is contained in:
Sara Souza
committed by
Gustavo Henrique Nihei
Gustavo Henrique Nihei
parent
2c91805d8f
commit
b01ddef61b
@@ -403,6 +403,13 @@ config ESP32C3_ONESHOT
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Enable a wrapper around the low level timer/counter functions to
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support one-shot timer.
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config ESP32C3_FREERUN
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bool "TIM free-running wrapper"
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default n
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---help---
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Enable a wrapper around the low level timer/counter functions to
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support a free-running timer.
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endmenu # Timer/counter Configuration
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endif # ESP32C3_TIMER
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@@ -100,6 +100,10 @@ ifeq ($(CONFIG_ESP32C3_RT_TIMER),y)
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CHIP_CSRCS += esp32c3_rt_timer.c
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endif
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ifeq ($(CONFIG_ESP32C3_FREERUN),y)
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CHIP_CSRCS += esp32c3_freerun.c
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endif
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ifeq ($(CONFIG_ESP32C3_DISABLE_STDC_ATOMIC),)
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CHIP_CSRCS += esp32c3_std_atomic.c
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endif
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File diff suppressed because it is too large
Load Diff
@@ -0,0 +1,145 @@
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/****************************************************************************
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* arch/risc-v/src/esp32c3/esp32c3_freerun.h
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership. The
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* ASF licenses this file to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance with the
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* License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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*
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****************************************************************************/
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#ifndef __ARCH_RISCV_SRC_ESP32C3_FREERUN_H
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#define __ARCH_RISCV_SRC_ESP32C3_FREERUN_H
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#include <stdint.h>
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#include <time.h>
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#include "esp32c3_tim.h"
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#ifdef CONFIG_ESP32C3_FREERUN
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/****************************************************************************
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* Public Types
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****************************************************************************/
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/* The freerun client must allocate an instance of this structure and called
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* esp32c3_freerun_initialize() before using the freerun facilities. The
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* client should not access the contents of this structure directly since
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* the contents are subject to change.
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*/
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struct esp32c3_freerun_s
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{
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uint8_t chan; /* The timer/counter in use */
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uint32_t overflow; /* Timer counter overflow */
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uint16_t resolution; /* Timer resolution */
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uint64_t max_timeout; /* Maximum timeout to overflow */
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FAR struct esp32c3_tim_dev_s *tch; /* Handle returned by esp32c3_tim_init() */
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};
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/****************************************************************************
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* Public Data
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****************************************************************************/
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#undef EXTERN
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#if defined(__cplusplus)
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#define EXTERN extern "C"
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extern "C"
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{
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#else
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#define EXTERN extern
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#endif
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/****************************************************************************
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* Public Function Prototypes
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****************************************************************************/
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/****************************************************************************
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* Name: esp32c3_freerun_initialize
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*
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* Description:
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* Initialize the freerun timer wrapper.
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*
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* Input Parameters:
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* freerun - Caller allocated instance of the freerun
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* state structure
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* chan - Timer counter channel to be used.
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* resolution - The required resolution of the timer in units of
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* microseconds. NOTE that the range is restricted to
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* the range of uint16_t (excluding zero).
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*
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* Returned Value:
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* Zero (OK) is returned on success; a negated errno value is returned
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* on failure.
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*
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****************************************************************************/
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int esp32c3_freerun_initialize(struct esp32c3_freerun_s *freerun, int chan,
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uint16_t resolution);
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/****************************************************************************
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* Name: esp32c3_freerun_counter
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*
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* Description:
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* Read the counter register of the free-running timer.
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*
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* Input Parameters:
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* freerun - Caller allocated instance of the freerun state
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* structure. This structure must have been previously
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* initialized via a call to
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* esp32c3_freerun_initialize();
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* ts - The location in which to return the time from the
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* free-running timer.
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*
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* Returned Value:
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* Zero (OK) is returned on success; a negated errno value is returned
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* on failure.
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*
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****************************************************************************/
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int esp32c3_freerun_counter(struct esp32c3_freerun_s *freerun,
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struct timespec *ts);
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/****************************************************************************
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* Name: esp32c3_freerun_uninitialize
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*
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* Description:
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* Stop the free-running timer and release all resources that it uses.
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*
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* Input Parameters:
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* freerun - Caller allocated instance of the freerun state
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* structure. This structure must have been previously
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* initialized via a call to
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* esp32c3_freerun_initialize();
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*
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* Returned Value:
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* Zero (OK) is returned on success; a negated errno value is returned
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* on failure.
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*
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****************************************************************************/
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int esp32c3_freerun_uninitialize(struct esp32c3_freerun_s *freerun);
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#undef EXTERN
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#ifdef __cplusplus
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}
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#endif
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#endif /* CONFIG_ESP32C3_FREERUN */
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#endif /* __ARCH_RISCV_SRC_ESP32C3_FREERUN_H */
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@@ -34,6 +34,7 @@
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#include "esp32c3_tim.h"
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#include "esp32c3_irq.h"
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#include "esp32c3_gpio.h"
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/****************************************************************************
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* Private Types
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@@ -82,6 +83,7 @@ static int esp32c3_tim_setisr(FAR struct esp32c3_tim_dev_s *dev,
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static void esp32c3_tim_enableint(FAR struct esp32c3_tim_dev_s *dev);
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static void esp32c3_tim_disableint(FAR struct esp32c3_tim_dev_s *dev);
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static void esp32c3_tim_ackint(FAR struct esp32c3_tim_dev_s *dev);
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static int esp32c3_tim_checkint(FAR struct esp32c3_tim_dev_s *dev);
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/****************************************************************************
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* Private Data
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@@ -107,7 +109,8 @@ struct esp32c3_tim_ops_s esp32c3_tim_ops =
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.setisr = esp32c3_tim_setisr,
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.enableint = esp32c3_tim_enableint,
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.disableint = esp32c3_tim_disableint,
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.ackint = esp32c3_tim_ackint
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.ackint = esp32c3_tim_ackint,
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.checkint = esp32c3_tim_checkint
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};
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#ifdef CONFIG_ESP32C3_TIMER0
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@@ -654,6 +657,31 @@ static void esp32c3_tim_ackint(FAR struct esp32c3_tim_dev_s *dev)
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modifyreg32(TIMG_INT_CLR_TIMERS_REG(priv->id), 0, TIMG_T0_INT_CLR_M);
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}
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/****************************************************************************
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* Name: esp32c3_tim_checkint
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*
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* Description:
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* Check the interrupt status bit.
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*
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* Parameters:
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* dev - Pointer to the timer driver struct.
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*
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* Returned Values:
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* Return 1 in case of an interrupt is triggered, otherwise 0.
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*
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****************************************************************************/
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static int esp32c3_tim_checkint(FAR struct esp32c3_tim_dev_s *dev)
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{
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struct esp32c3_tim_priv_s *priv = (struct esp32c3_tim_priv_s *)dev;
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uint32_t reg_value;
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DEBUGASSERT(dev != NULL);
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reg_value = getreg32(TIMG_INT_ST_TIMERS_REG(priv->id));
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return ((reg_value & TIMG_T0_INT_ST_V) >> TIMG_T0_INT_ST_S);
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}
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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@@ -53,6 +53,7 @@
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#define ESP32C3_TIM_ENABLEINT(d) ((d)->ops->enableint(d))
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#define ESP32C3_TIM_DISABLEINT(d) ((d)->ops->disableint(d))
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#define ESP32C3_TIM_ACKINT(d) ((d)->ops->ackint(d))
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#define ESP32C3_TIM_CHECKINT(d) ((d)->ops->checkint(d))
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/****************************************************************************
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* Public Types
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@@ -126,6 +127,7 @@ struct esp32c3_tim_ops_s
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CODE void (*enableint)(FAR struct esp32c3_tim_dev_s *dev);
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CODE void (*disableint)(FAR struct esp32c3_tim_dev_s *dev);
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CODE void (*ackint)(FAR struct esp32c3_tim_dev_s *dev);
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CODE int (*checkint)(FAR struct esp32c3_tim_dev_s *dev);
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};
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/****************************************************************************
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@@ -72,7 +72,7 @@
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/* Maximum value in the high 22 bits from timer counters */
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#define LOW_32_MASK 0xffffffff
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#define LOW_22_MASK 0x3fffff
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#define LOW_22_MASK 0x003fffff
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#define SHIFT_32 32
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#define TIMG_T0CONFIG_REG(i) (REG_TIMG_BASE(i) + 0x0000)
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