risc-v/espressif: Add support for Oneshot Timer

Signed-off-by: Gustavo Henrique Nihei <gustavo.nihei@espressif.com>

arch/risc-v/src/espressif/Make.defs

@@ -50,6 +50,10 @@ ifeq ($(CONFIG_TIMER),y)
 CHIP_CSRCS += esp_timer.c
 endif
 
+ifeq ($(CONFIG_ONESHOT),y)
+CHIP_CSRCS += esp_oneshot.c
+endif
+
 ifeq ($(CONFIG_ESPRESSIF_HR_TIMER),y)
 CHIP_CSRCS += esp_hr_timer.c
 endif

arch/risc-v/src/espressif/esp_oneshot.h

@@ -0,0 +1,51 @@
+/****************************************************************************
+ * arch/risc-v/src/espressif/esp_oneshot.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_ONESHOT_H
+#define __ARCH_RISCV_SRC_ESPRESSIF_ESP_ONESHOT_H
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+
+/****************************************************************************
+ * Public Function Prototypes
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: esp_oneshot_initialize
+ *
+ * Description:
+ *   Initialize a oneshot timer device.
+ *
+ * Input Parameters:
+ *   None.
+ *
+ * Returned Values:
+ *   Zero (OK) is returned on success; a negated errno value is returned on
+ *   any failure.
+ *
+ ****************************************************************************/
+
+int esp_oneshot_initialize(void);
+
+#endif /* __ARCH_RISCV_SRC_ESPRESSIF_ESP_ONESHOT_H */

boards/risc-v/espressif/esp32c3-generic/configs/timers/defconfig

@@ -19,6 +19,7 @@ CONFIG_ARCH_STACKDUMP=y
 CONFIG_BOARD_LOOPSPERMSEC=15000
 CONFIG_BUILTIN=y
 CONFIG_DEV_ZERO=y
+CONFIG_EXAMPLES_ONESHOT=y
 CONFIG_EXAMPLES_TIMER=y
 CONFIG_FS_PROCFS=y
 CONFIG_IDLETHREAD_STACKSIZE=2048
@@ -32,6 +33,7 @@ CONFIG_NSH_BUILTIN_APPS=y
 CONFIG_NSH_FILEIOSIZE=512
 CONFIG_NSH_READLINE=y
 CONFIG_NSH_STRERROR=y
+CONFIG_ONESHOT=y
 CONFIG_PREALLOC_TIMERS=0
 CONFIG_RR_INTERVAL=200
 CONFIG_SCHED_BACKTRACE=y

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

@@ -42,6 +42,10 @@
 #  include "esp_timer.h"
 #endif
 
+#ifdef CONFIG_ONESHOT
+#  include "esp_oneshot.h"
+#endif
+
 #ifdef CONFIG_ESPRESSIF_HR_TIMER
 #  include "esp_hr_timer.h"
 #endif
@@ -116,12 +120,22 @@ int esp_bringup(void)
       _err("Failed to initialize Timer 0: %d\n", ret);
     }
 
+#ifndef CONFIG_ONESHOT
   ret = esp_timer_initialize(1);
   if (ret < 0)
     {
       _err("Failed to initialize Timer 1: %d\n", ret);
     }
 #endif
+#endif
+
+#ifdef CONFIG_ONESHOT
+  ret = esp_oneshot_initialize();
+  if (ret < 0)
+    {
+      _err("Failed to initialize Oneshot Timer: %d\n", ret);
+    }
+#endif
 
 #ifdef CONFIG_ESPRESSIF_HR_TIMER
   ret = esp_hr_timer_init();

boards/risc-v/espressif/esp32c6-generic/configs/timers/defconfig

@@ -20,6 +20,7 @@ CONFIG_BOARD_LOOPSPERMSEC=15000
 CONFIG_BUILTIN=y
 CONFIG_DEV_ZERO=y
 CONFIG_ESPRESSIF_ESP32C6=y
+CONFIG_EXAMPLES_ONESHOT=y
 CONFIG_EXAMPLES_TIMER=y
 CONFIG_FS_PROCFS=y
 CONFIG_IDLETHREAD_STACKSIZE=2048
@@ -33,6 +34,7 @@ CONFIG_NSH_BUILTIN_APPS=y
 CONFIG_NSH_FILEIOSIZE=512
 CONFIG_NSH_READLINE=y
 CONFIG_NSH_STRERROR=y
+CONFIG_ONESHOT=y
 CONFIG_PREALLOC_TIMERS=0
 CONFIG_RR_INTERVAL=200
 CONFIG_SCHED_BACKTRACE=y

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

@@ -42,6 +42,10 @@
 #  include "esp_timer.h"
 #endif
 
+#ifdef CONFIG_ONESHOT
+#  include "esp_oneshot.h"
+#endif
+
 #ifdef CONFIG_ESPRESSIF_HR_TIMER
 #  include "esp_hr_timer.h"
 #endif
@@ -116,12 +120,22 @@ int esp_bringup(void)
       _err("Failed to initialize Timer 0: %d\n", ret);
     }
 
+#ifndef CONFIG_ONESHOT
   ret = esp_timer_initialize(1);
   if (ret < 0)
     {
       _err("Failed to initialize Timer 1: %d\n", ret);
     }
 #endif
+#endif
+
+#ifdef CONFIG_ONESHOT
+  ret = esp_oneshot_initialize();
+  if (ret < 0)
+    {
+      _err("Failed to initialize Oneshot Timer: %d\n", ret);
+    }
+#endif
 
 #ifdef CONFIG_ESPRESSIF_HR_TIMER
   ret = esp_hr_timer_init();

boards/risc-v/espressif/esp32h2-generic/configs/timers/defconfig

@@ -20,6 +20,7 @@ CONFIG_BOARD_LOOPSPERMSEC=15000
 CONFIG_BUILTIN=y
 CONFIG_DEV_ZERO=y
 CONFIG_ESPRESSIF_ESP32H2=y
+CONFIG_EXAMPLES_ONESHOT=y
 CONFIG_EXAMPLES_TIMER=y
 CONFIG_FS_PROCFS=y
 CONFIG_IDLETHREAD_STACKSIZE=2048
@@ -33,6 +34,7 @@ CONFIG_NSH_BUILTIN_APPS=y
 CONFIG_NSH_FILEIOSIZE=512
 CONFIG_NSH_READLINE=y
 CONFIG_NSH_STRERROR=y
+CONFIG_ONESHOT=y
 CONFIG_PREALLOC_TIMERS=0
 CONFIG_RR_INTERVAL=200
 CONFIG_SCHED_BACKTRACE=y

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

@@ -42,6 +42,10 @@
 #  include "esp_timer.h"
 #endif
 
+#ifdef CONFIG_ONESHOT
+#  include "esp_oneshot.h"
+#endif
+
 #ifdef CONFIG_ESPRESSIF_HR_TIMER
 #  include "esp_hr_timer.h"
 #endif
@@ -116,12 +120,22 @@ int esp_bringup(void)
       _err("Failed to initialize Timer 0: %d\n", ret);
     }
 
+#ifndef CONFIG_ONESHOT
   ret = esp_timer_initialize(1);
   if (ret < 0)
     {
       _err("Failed to initialize Timer 1: %d\n", ret);
     }
 #endif
+#endif
+
+#ifdef CONFIG_ONESHOT
+  ret = esp_oneshot_initialize();
+  if (ret < 0)
+    {
+      _err("Failed to initialize Oneshot Timer: %d\n", ret);
+    }
+#endif
 
 #ifdef CONFIG_ESPRESSIF_HR_TIMER
   ret = esp_hr_timer_init();