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author | Stephane D'Alu <sdalu@sdalu.com> | 2016-02-06 20:11:26 +0100 |
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committer | Stephane D'Alu <sdalu@sdalu.com> | 2016-02-06 20:11:26 +0100 |
commit | 9740836e615a24d6053f1a858ce27f62697da13c (patch) | |
tree | 74d230d1dc6827a40ba5fd0a787f928af924e08d /os/hal/ports/NRF51 | |
parent | 5af8452153646009731c11dd92a8634695b60d55 (diff) | |
download | ChibiOS-Contrib-9740836e615a24d6053f1a858ce27f62697da13c.tar.gz ChibiOS-Contrib-9740836e615a24d6053f1a858ce27f62697da13c.tar.bz2 ChibiOS-Contrib-9740836e615a24d6053f1a858ce27f62697da13c.zip |
Added watchdog WDT
Diffstat (limited to 'os/hal/ports/NRF51')
-rw-r--r-- | os/hal/ports/NRF51/NRF51822/wdg_lld.c | 150 | ||||
-rw-r--r-- | os/hal/ports/NRF51/NRF51822/wdg_lld.h | 127 |
2 files changed, 277 insertions, 0 deletions
diff --git a/os/hal/ports/NRF51/NRF51822/wdg_lld.c b/os/hal/ports/NRF51/NRF51822/wdg_lld.c new file mode 100644 index 0000000..bd17ef7 --- /dev/null +++ b/os/hal/ports/NRF51/NRF51822/wdg_lld.c @@ -0,0 +1,150 @@ +/*
+ ChibiOS - Copyright (C) 2006..2015 Giovanni Di Sirio
+
+ 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 templates/wdg_lld.c
+ * @brief WDG Driver subsystem low level driver source template.
+ *
+ * @addtogroup WDG
+ * @{
+ */
+
+#include "hal.h"
+
+#if HAL_USE_WDG || defined(__DOXYGEN__)
+
+/*===========================================================================*/
+/* Driver local definitions. */
+/*===========================================================================*/
+
+#define RELOAD_REQUEST_VALUE 0x6E524635
+
+/*===========================================================================*/
+/* Driver exported variables. */
+/*===========================================================================*/
+
+WDGDriver WDGD1;
+
+/*===========================================================================*/
+/* Driver local variables. */
+/*===========================================================================*/
+
+/*===========================================================================*/
+/* Driver local functions. */
+/*===========================================================================*/
+
+/*===========================================================================*/
+/* Driver interrupt handlers. */
+/*===========================================================================*/
+
+#if WDG_USE_TIMEOUT_CALLBACK == TRUE
+/**
+ * @brief Watchdog vector.
+ * @details This interrupt is used when watchdog timeout.
+ *
+ * @note Only 2 cycles at NRF51_LFCLK_FREQUENCY are available
+ * to they good bye.
+ *
+ * @isr
+ */
+OSAL_IRQ_HANDLER(Vector84) {
+
+ OSAL_IRQ_PROLOGUE();
+ osalSysLockFromISR();
+
+ /* Notify */
+ if (WDGD1.config->callback)
+ WDGD1.config->callback();
+
+ /* Wait for reboot */
+ while (1) { /* */ }
+
+ osalSysUnlockFromISR();
+ OSAL_IRQ_EPILOGUE();
+}
+#endif
+
+/*===========================================================================*/
+/* Driver exported functions. */
+/*===========================================================================*/
+
+/**
+ * @brief Low level WDG driver initialization.
+ *
+ * @notapi
+ */
+void wdg_lld_init(void) {
+ WDGD1.state = WDG_STOP;
+ WDGD1.wdt = NRF_WDT;
+}
+
+/**
+ * @brief Configures and activates the WDG peripheral.
+ *
+ * @note Once started there is now way out.
+ *
+ * @param[in] wdgp pointer to the @p WDGDriver object
+ *
+ * @notapi
+ */
+void wdg_lld_start(WDGDriver *wdgp) {
+#if WDG_USE_TIMEOUT_CALLBACK == TRUE
+ wdgp->wdt->INTENSET = WDT_INTENSET_TIMEOUT_Msk;
+#endif
+
+ /* When to pause? (halt, sleep) */
+ wdgp->wdt->CONFIG =
+ (wdgp->config->flags.pause_on_sleep * WDT_CONFIG_SLEEP_Msk) |
+ (wdgp->config->flags.pause_on_halt * WDT_CONFIG_HALT_Msk );
+
+ /* Timeout in milli-seconds */
+ uint64_t tout = (NRF51_LFCLK_FREQUENCY * wdgp->config->timeout_ms / 1000) - 1;
+ osalDbgAssert(tout <= 0xFFFFFFFF, "watchdog timout value exceeded");
+ wdgp->wdt->CRV = (uint32_t)tout;
+
+ /* Reload request (using RR0) */
+ wdgp->wdt->RREN = WDT_RREN_RR0_Msk;
+
+ /* Say your prayers, little one. */
+ wdgp->wdt->TASKS_START = 1;
+}
+
+/**
+ * @brief Deactivates the WDG peripheral.
+ *
+ * @param[in] wdgp pointer to the @p WDGDriver object
+ *
+ * @api
+ */
+void wdg_lld_stop(WDGDriver *wdgp) {
+ (void)wdgp;
+ osalDbgAssert(false, "WDG cannot be stopped once activated");
+}
+
+/**
+ * @brief Reloads WDG's counter.
+ *
+ * @param[in] wdgp pointer to the @p WDGDriver object
+ *
+ * @notapi
+ */
+void wdg_lld_reset(WDGDriver * wdgp) {
+ wdgp->wdt->RR[0] = RELOAD_REQUEST_VALUE;
+}
+
+#endif /* HAL_USE_WDG */
+
+/** @} */
diff --git a/os/hal/ports/NRF51/NRF51822/wdg_lld.h b/os/hal/ports/NRF51/NRF51822/wdg_lld.h new file mode 100644 index 0000000..8a3f97d --- /dev/null +++ b/os/hal/ports/NRF51/NRF51822/wdg_lld.h @@ -0,0 +1,127 @@ +/*
+ ChibiOS - Copyright (C) 2006 Stephane D'Alu
+
+ 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 templates/wdg_lld.h
+ * @brief WDG Driver subsystem low level driver header template.
+ *
+ * @addtogroup WDG
+ * @{
+ */
+
+#ifndef _WDG_LLD_H_
+#define _WDG_LLD_H_
+
+#if (HAL_USE_WDG == TRUE) || defined(__DOXYGEN__)
+
+/*===========================================================================*/
+/* Driver constants. */
+/*===========================================================================*/
+
+#define WDG_MAX_TIMEOUT_MS \
+ ((uint32_t)(0xFFFFFFFFu * 1000 / NRF51_LFCLK_FREQUENCY))
+
+/*===========================================================================*/
+/* Driver pre-compile time settings. */
+/*===========================================================================*/
+
+/**
+ * @name Configuration options
+ * @{
+ */
+
+/**
+ * @brief WDG driver implement timeout callback.
+ * @note The default is @p FALSE.
+ */
+#if !defined(WDG_USE_TIMEOUT_CALLBACK) || defined(__DOXYGEN__)
+#define WDG_USE_TIMEOUT_CALLBACK FALSE
+#endif
+/** @} */
+
+
+/*===========================================================================*/
+/* Derived constants and error checks. */
+/*===========================================================================*/
+
+/*===========================================================================*/
+/* 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 {
+ struct {
+ uint8_t pause_on_sleep : 1;
+ uint8_t pause_on_halt : 1;
+ } flags;
+ uint32_t timeout_ms;
+#if WDG_USE_TIMEOUT_CALLBACK == TRUE
+ void (*callback)(void);
+#endif
+} 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.*/
+ NRF_WDT_Type *wdt;
+};
+
+/*===========================================================================*/
+/* Driver macros. */
+/*===========================================================================*/
+
+/*===========================================================================*/
+/* External declarations. */
+/*===========================================================================*/
+
+extern WDGDriver WDGD1;
+
+#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 /* _WDG_LLD_H_ */
+
+/** @} */
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