diff options
| author | Giovanni Di Sirio <gdisirio@gmail.com> | 2016-04-02 08:31:39 +0000 |
|---|---|---|
| committer | Giovanni Di Sirio <gdisirio@gmail.com> | 2016-04-02 08:31:39 +0000 |
| commit | a84c32523cb971505e03ae73409839637d8706a9 (patch) | |
| tree | 0fbdac64cba70108c3a6106e137cef741e1901ba /os/hal/ports/STM32/LLD/xWDGv1/hal_wdg_lld.c | |
| parent | f905d498c81714e5c846529a441ef6977908d39f (diff) | |
| download | ChibiOS-a84c32523cb971505e03ae73409839637d8706a9.tar.gz ChibiOS-a84c32523cb971505e03ae73409839637d8706a9.tar.bz2 ChibiOS-a84c32523cb971505e03ae73409839637d8706a9.zip | |
STM32 LLD renaming done.
git-svn-id: svn://svn.code.sf.net/p/chibios/svn/trunk@9208 35acf78f-673a-0410-8e92-d51de3d6d3f4
Diffstat (limited to 'os/hal/ports/STM32/LLD/xWDGv1/hal_wdg_lld.c')
| -rw-r--r-- | os/hal/ports/STM32/LLD/xWDGv1/hal_wdg_lld.c | 140 |
1 files changed, 140 insertions, 0 deletions
diff --git a/os/hal/ports/STM32/LLD/xWDGv1/hal_wdg_lld.c b/os/hal/ports/STM32/LLD/xWDGv1/hal_wdg_lld.c new file mode 100644 index 000000000..15cfefd72 --- /dev/null +++ b/os/hal/ports/STM32/LLD/xWDGv1/hal_wdg_lld.c @@ -0,0 +1,140 @@ +/*
+ ChibiOS - Copyright (C) 2006..2016 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 wdg_lld.c
+ * @brief WDG Driver subsystem low level driver source.
+ *
+ * @addtogroup WDG
+ * @{
+ */
+
+#include "hal.h"
+
+#if (HAL_USE_WDG == TRUE) || defined(__DOXYGEN__)
+
+/*===========================================================================*/
+/* Driver local definitions. */
+/*===========================================================================*/
+
+#define KR_KEY_RELOAD 0xAAAAU
+#define KR_KEY_ENABLE 0xCCCCU
+#define KR_KEY_WRITE 0x5555U
+#define KR_KEY_PROTECT 0x0000U
+
+/*===========================================================================*/
+/* Driver exported variables. */
+/*===========================================================================*/
+
+#if STM32_WDG_USE_IWDG || defined(__DOXYGEN__)
+WDGDriver WDGD1;
+#endif
+
+/*===========================================================================*/
+/* Driver local variables. */
+/*===========================================================================*/
+
+/*===========================================================================*/
+/* Driver local functions. */
+/*===========================================================================*/
+
+/*===========================================================================*/
+/* Driver interrupt handlers. */
+/*===========================================================================*/
+
+/*===========================================================================*/
+/* Driver exported functions. */
+/*===========================================================================*/
+
+/**
+ * @brief Low level WDG driver initialization.
+ *
+ * @notapi
+ */
+void wdg_lld_init(void) {
+
+#if STM32_WDG_USE_IWDG
+ WDGD1.state = WDG_STOP;
+ WDGD1.wdg = IWDG;
+#endif
+}
+
+/**
+ * @brief Configures and activates the WDG peripheral.
+ *
+ * @param[in] wdgp pointer to the @p WDGDriver object
+ *
+ * @notapi
+ */
+void wdg_lld_start(WDGDriver *wdgp) {
+
+#if STM32_IWDG_IS_WINDOWED
+ /* Enable IWDG and unlock for write.*/
+ wdgp->wdg->KR = KR_KEY_ENABLE;
+ wdgp->wdg->KR = KR_KEY_WRITE;
+
+ /* Write configuration.*/
+ wdgp->wdg->PR = wdgp->config->pr;
+ wdgp->wdg->RLR = wdgp->config->rlr;
+ while (wdgp->wdg->SR != 0)
+ ;
+
+ /* This also triggers a refresh.*/
+ wdgp->wdg->WINR = wdgp->config->winr;
+#else
+ /* Unlock IWDG.*/
+ wdgp->wdg->KR = KR_KEY_WRITE;
+
+ /* Write configuration.*/
+ while (wdgp->wdg->SR != 0)
+ ;
+ wdgp->wdg->PR = wdgp->config->pr;
+ wdgp->wdg->RLR = wdgp->config->rlr;
+
+ /* Start operations.*/
+ wdgp->wdg->KR = KR_KEY_RELOAD;
+ wdgp->wdg->KR = KR_KEY_ENABLE;
+#endif
+}
+
+/**
+ * @brief Deactivates the WDG peripheral.
+ *
+ * @param[in] wdgp pointer to the @p WDGDriver object
+ *
+ * @api
+ */
+void wdg_lld_stop(WDGDriver *wdgp) {
+
+ osalDbgAssert(wdgp->state == WDG_STOP,
+ "IWDG 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->wdg->KR = KR_KEY_RELOAD;
+}
+
+#endif /* HAL_USE_WDG == TRUE */
+
+/** @} */
|