AVR: Add the support of the Watchdog low level driver to the XMEGA128A4U.

git-svn-id: svn://svn.code.sf.net/p/chibios/svn/trunk@11513 35acf78f-673a-0410-8e92-d51de3d6d3f4

3 files changed, 416 insertions, 0 deletions

diff --git a/os/hal/ports/AVR/XMEGA/LLD/WDGv1/driver.mk b/os/hal/ports/AVR/XMEGA/LLD/WDGv1/driver.mk
new file mode 100644
index 000000000..70ba572bb
--- /dev/null
+++ b/os/hal/ports/AVR/XMEGA/LLD/WDGv1/driver.mk
@@ -0,0 +1,9 @@
+ifeq ($(USE_SMART_BUILD),yes)

+ifneq ($(findstring HAL_USE_WDG TRUE,$(HALCONF)),)

+PLATFORMSRC += $(CHIBIOS)/os/hal/ports/AVR/XMEGA/LLD/WDGv1/hal_wdg_lld.c

+endif

+else

+PLATFORMSRC += $(CHIBIOS)/os/hal/ports/AVR/XMEGA/LLD/WDGv1/hal_wdg_lld.c

+endif

+

+PLATFORMINC += $(CHIBIOS)/os/hal/ports/AVR/XMEGA/LLD/WDGv1

diff --git a/os/hal/ports/AVR/XMEGA/LLD/WDGv1/hal_wdg_lld.c b/os/hal/ports/AVR/XMEGA/LLD/WDGv1/hal_wdg_lld.c
new file mode 100644
index 000000000..505c20d72
--- /dev/null
+++ b/os/hal/ports/AVR/XMEGA/LLD/WDGv1/hal_wdg_lld.c
@@ -0,0 +1,268 @@
+/*

+    ChibiOS - Copyright (C) 2016..2018 Theodore Ateba

+

+    Licensed 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.

+*/

+

+/**

+ * @file    hal_wdg_lld.c

+ * @brief   AVR WDG Driver subsystem low level driver source.

+ *

+ * @addtogroup WDG

+ * @{

+ */

+

+#include "hal.h"

+

+#if (HAL_USE_WDG == TRUE) || defined(__DOXYGEN__)

+

+/*==========================================================================*/

+/* Driver local definitions.                                                */

+/*==========================================================================*/

+

+/*==========================================================================*/

+/* Driver exported variables.                                               */

+/*==========================================================================*/

+

+#if (AVR_WDG_USE_WDT == TRUE) || defined(__DOXYGEN__)

+WDGDriver WDTD1;

+#endif

+

+/*==========================================================================*/

+/* Driver local variables.                                                  */

+/*==========================================================================*/

+

+/*==========================================================================*/

+/* Driver local functions.                                                  */

+/*==========================================================================*/

+

+/**

+ * @brief   Check if Synchronisation busy flag is set.

+ *

+ * @param[in] wdgp      pointer to the @p WDGDriver object

+ * @return              synchronisazion busy flag value

+ * @retval    true      The synchronisation is in process.

+ * @retval    false     The synchronisation is done.

+ */

+static bool wdg_get_sync_busy_flag(WDGDriver *wdgp) {

+

+  if (wdgp->wdg->STATUS & WDT_SYNCBUSY_bm)

+    return true;

+  else

+    return false;

+}

+

+/**

+ * @brief   Enable Watchdog module.

+ *

+ * @param[in] wdgp      pointer to the @p WDGDriver object

+ */

+static void wdg_enable(WDGDriver *wdgp) {

+

+	uint8_t cfg = wdgp->wdg->CTRL | WDT_ENABLE_bm | WDT_CEN_bm;

+	CCP = CCP_IOREG_gc;

+	wdgp->wdg->CTRL = cfg;

+

+	while (wdg_get_sync_busy_flag(wdgp));

+}

+

+/**

+ * @brief   Set the watchdog period for the reset operation.

+ *

+ * @param[in] wdgp      pointer to the @p WDGDriver object

+ */

+static void wdg_set_period(WDGDriver *wdgp) {

+

+	uint8_t cfg = WDT_ENABLE_bm | WDT_CEN_bm | wdgp->config->ntp;

+	CCP = CCP_IOREG_gc;

+	wdgp->wdg->CTRL = cfg;

+

+	while (wdg_get_sync_busy_flag(wdgp));

+}

+

+/**

+ * @brief   Disable Watchdog module.

+ *

+ * @param[in] wdgp      pointer to the @p WDGDriver object

+ */

+static void wdg_disable(WDGDriver *wdgp) {

+

+	uint8_t cfg = (wdgp->wdg->CTRL & ~WDT_ENABLE_bm) | WDT_CEN_bm;

+	CCP = CCP_IOREG_gc;

+	wdgp->wdg->CTRL = cfg;

+}

+

+/**

+ * @brief   Return status of window mode enable bit.

+ *

+ * @param[in] wdgp      pointer to the @p WDGDriver object

+ * @return              The status of the watchdog module

+ * @retval    true      The WD Window Mode is enabled.

+ * @retval    false     The WD Eindow Mode is not enabled.

+ */

+/*static bool wdg_is_window_mode_enabled(WDGDriver *wdgp) {

+

+  if (wdgp->wdg->WINCTRL & WDT_WEN_bm)

+    return true;

+  else

+    return false;

+}

+*/

+

+/**

+ * @brief Enable watchdog window mode.

+ *

+ * @param[in] wdgp      pointer to the @p WDGDriver object

+ * @return    wd_enble  status of the watchdog before the operation

+ * @retval    true      The WD is enabled before enabling window mode.

+ * @retval    false     The WD is not enabled before enabling window mode.

+ */

+static bool wdg_enable_window_mode(WDGDriver *wdgp) {

+

+	uint8_t wdStatus = wdgp->wdg->CTRL & WDT_ENABLE_bm;

+	uint8_t cfg = wdgp->wdg->WINCTRL | WDT_WEN_bm | WDT_WCEN_bm;

+

+  CCP = CCP_IOREG_gc;

+	wdgp->wdg->WINCTRL = cfg;

+

+	while (wdg_get_sync_busy_flag(wdgp));

+

+	return wdStatus;

+}

+

+/**

+ * @brief Enable window mode and set period.

+ *

+ * @param[in] wdgp      pointer to the @p WDGDriver object

+ * @return              The satus of the watchdog before this operation

+ * @retval    true      The WD is enabled before enabling window mode.

+ * @retval    false     The WD is not enabled before enabling window mode.

+ */

+static bool wdg_set_window_period(WDGDriver *wdgp) {

+

+	uint8_t wdStatus = wdgp->wdg->CTRL & WDT_ENABLE_bm;

+	uint8_t cfg = WDT_WEN_bm | WDT_WCEN_bm | wdgp->config->ntp;

+

+	CCP = CCP_IOREG_gc;

+	wdgp->wdg->WINCTRL = cfg;

+

+	while (wdg_get_sync_busy_flag(wdgp));

+

+	return wdStatus;

+}

+

+/**

+ * @brief   Disable window mode.

+ *

+ * @param[in] wdgp      pointer to the @p WDGDriver object

+ */

+static void wdg_disable_window_mode(WDGDriver *wdgp) {

+

+	uint8_t cfg = (wdgp->wdg->WINCTRL & ~WDT_WEN_bm) | WDT_WCEN_bm;

+

+	CCP = CCP_IOREG_gc;

+  wdgp->wdg->WINCTRL = cfg;

+}

+

+/**

+ * @brief   Low level reset of the Watchgot timer by software.

+ *

+ * @param[in] wdgp      pointer to the @p WDGDriver object

+ */

+static void wdg_reset(WDGDriver *wdgp) {

+

+  (void)wdgp;

+  asm("wdr"); /* The reset is made by calling WDR instruction. */

+}

+

+/*==========================================================================*/

+/* Driver interrupt handlers.                                               */

+/*==========================================================================*/

+

+/*==========================================================================*/

+/* Driver exported functions.                                               */

+/*==========================================================================*/

+

+/**

+ * @brief   Low level WDG driver initialization.

+ *

+ * @notapi

+ */

+void wdg_lld_init(void) {

+

+#if AVR_WDG_USE_WDT

+  WDTD1.state = WDG_STOP;

+  WDTD1.wdg   = &WDT;

+#endif

+  /*  TODO: See if the configuration of the watchgod must

+   * be done with a default configuration.

+   */

+}

+

+/**

+ * @brief   Configures and activates the WDG peripheral.

+ *

+ * @param[in] wdgp      pointer to the @p WDGDriver object

+ *

+ * @notapi

+ */

+void wdg_lld_start(WDGDriver *wdgp) {

+

+  /* TODO: Use the wdgp->state to see if it is a start or a restart

+   * and look what to do

+   */

+

+  if (wdgp->config->mode) {

+    wdg_set_window_period(wdgp);

+    wdg_enable_window_mode(wdgp);

+  }

+  else {

+    wdg_set_period(wdgp);

+    wdg_enable(wdgp);

+  }

+

+	while (wdg_get_sync_busy_flag(wdgp));

+}

+

+/**

+ * @brief   Deactivates the WDG peripheral.

+ *

+ * @param[in] wdgp      pointer to the @p WDGDriver object

+ *

+ * @notapi

+ */

+void wdg_lld_stop(WDGDriver *wdgp) {

+

+  if (wdgp->config->mode) {

+    wdg_disable_window_mode(wdgp);

+  }

+  else {

+    wdg_disable(wdgp);

+  }

+}

+

+/**

+ * @brief   Reloads WDG's counter.

+ *

+ * @param[in] wdgp      pointer to the @p WDGDriver object

+ *

+ * @notapi

+ */

+void wdg_lld_reset(WDGDriver *wdgp) {

+

+  wdg_reset(wdgp);

+}

+

+#endif /* HAL_USE_WDG */

+

+/** @} */

diff --git a/os/hal/ports/AVR/XMEGA/LLD/WDGv1/hal_wdg_lld.h b/os/hal/ports/AVR/XMEGA/LLD/WDGv1/hal_wdg_lld.h
new file mode 100644
index 000000000..594758c5b
--- /dev/null
+++ b/os/hal/ports/AVR/XMEGA/LLD/WDGv1/hal_wdg_lld.h
@@ -0,0 +1,139 @@
+/*

+    ChibiOS - Copyright (C) 2016..2018 Theodore Ateba

+

+    Licensed 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.

+*/

+

+/**

+ * @file    WDGv1/hal_wdg_lld.h

+ * @brief   WDG Driver subsystem low level driver header.

+ *

+ * @addtogroup WDG

+ * @{

+ */

+

+#ifndef HAL_WDG_LLD_H

+#define HAL_WDG_LLD_H

+

+#if (HAL_USE_WDG == TRUE) || defined(__DOXYGEN__)

+

+/*==========================================================================*/

+/* Driver constants.                                                        */

+/*==========================================================================*/

+

+/*==========================================================================*/

+/* Driver pre-compile time settings.                                        */

+/*==========================================================================*/

+

+/**

+ * @name    Configuration options

+ * @{

+ */

+/**

+ * @brief   WDT driver enable switch.

+ * @note    The default is @p FALSE.

+ */

+#if !defined(AVR_WDG_USE_WDT) || defined(__DOXYGEN__)

+#define AVR_WDG_USE_WDT                     FALSE

+#endif

+/** @} */

+

+/*==========================================================================*/

+/* Derived constants and error checks.                                      */

+/*==========================================================================*/

+

+#define AVR_HAS_WDG   TRUE

+

+#if AVR_WDG_USE_WDT && !AVR_HAS_WDG

+#error "WDT not present in the selected device"

+#endif

+

+#if !AVR_WDG_USE_WDT

+#error "WDT driver activated but no WDT peripheral assigned"

+#endif

+

+/*==========================================================================*/

+/* Driver data structures and types.                                        */

+/*==========================================================================*/

+

+/**

+ * @brief   Type of a structure representing an WDG driver.

+ */

+typedef struct WDGDriver WDGDriver;

+

+/**

+ * @brief   Driver configuration structure.

+ * @note    It could be empty on some architectures.

+ */

+typedef struct {

+  /**

+   * @brief   Configuration of the WDT driver mode.

+   */

+  bool        mode;

+  /**

+   * @brief   Configuration of the WDT driver Nomal timeout period.

+   */

+  WDT_PER_t   ntp;

+  /**

+   * @brief   Configuration of the WDT driver Closed timeout period.

+   */

+  WDT_WPER_t  ctp;

+} WDGConfig;

+

+/**

+ * @brief   Structure representing an WDG driver.

+ */

+struct WDGDriver {

+  /**

+   * @brief   Driver state.

+   */

+  wdgstate_t                state;

+  /**

+   * @brief   Current configuration data.

+   */

+  const WDGConfig           *config;

+  /* End of the mandatory fields. */

+  /**

+   * @brief   Pointer to the WDG*T registers block.

+   */

+  WDT_t                     *wdg;

+};

+

+/*==========================================================================*/

+/* Driver macros.                                                           */

+/*==========================================================================*/

+

+/*==========================================================================*/

+/* External declarations.                                                   */

+/*==========================================================================*/

+

+#if (AVR_WDG_USE_WDT == TRUE) && !defined(__DOXYGEN__)

+extern WDGDriver WDTD1;

+#endif

+

+#ifdef __cplusplus

+extern "C" {

+#endif

+  void wdg_lld_init(void);

+  void wdg_lld_start(WDGDriver *wdgp);

+  void wdg_lld_stop(WDGDriver *wdgp);

+  void wdg_lld_reset(WDGDriver *wdgp);

+#ifdef __cplusplus

+}

+#endif

+

+#endif /* HAL_USE_WDG == TRUE */

+

+#endif /* HAL_WDG_LLD_H */

+

+/** @} */