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
This commit is contained in:
Theodore Ateba
parent
89821914a5
commit
18a083a0f2
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ifeq ($(USE_SMART_BUILD),yes)
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ifneq ($(findstring HAL_USE_WDG TRUE,$(HALCONF)),)
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PLATFORMSRC += $(CHIBIOS)/os/hal/ports/AVR/XMEGA/LLD/WDGv1/hal_wdg_lld.c
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endif
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else
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PLATFORMSRC += $(CHIBIOS)/os/hal/ports/AVR/XMEGA/LLD/WDGv1/hal_wdg_lld.c
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endif
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PLATFORMINC += $(CHIBIOS)/os/hal/ports/AVR/XMEGA/LLD/WDGv1
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/*
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ChibiOS - Copyright (C) 2016..2018 Theodore Ateba
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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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,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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/**
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* @file hal_wdg_lld.c
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* @brief AVR WDG Driver subsystem low level driver source.
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*
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* @addtogroup WDG
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* @{
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*/
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#include "hal.h"
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#if (HAL_USE_WDG == TRUE) || defined(__DOXYGEN__)
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/*==========================================================================*/
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/* Driver local definitions. */
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/*==========================================================================*/
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/*==========================================================================*/
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/* Driver exported variables. */
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/*==========================================================================*/
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#if (AVR_WDG_USE_WDT == TRUE) || defined(__DOXYGEN__)
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WDGDriver WDTD1;
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#endif
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/*==========================================================================*/
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/* Driver local variables. */
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/*==========================================================================*/
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/*==========================================================================*/
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/* Driver local functions. */
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/*==========================================================================*/
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/**
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* @brief Check if Synchronisation busy flag is set.
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*
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* @param[in] wdgp pointer to the @p WDGDriver object
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* @return synchronisazion busy flag value
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* @retval true The synchronisation is in process.
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* @retval false The synchronisation is done.
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*/
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static bool wdg_get_sync_busy_flag(WDGDriver *wdgp) {
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if (wdgp->wdg->STATUS & WDT_SYNCBUSY_bm)
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return true;
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else
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return false;
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}
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/**
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* @brief Enable Watchdog module.
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*
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* @param[in] wdgp pointer to the @p WDGDriver object
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*/
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static void wdg_enable(WDGDriver *wdgp) {
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uint8_t cfg = wdgp->wdg->CTRL | WDT_ENABLE_bm | WDT_CEN_bm;
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CCP = CCP_IOREG_gc;
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wdgp->wdg->CTRL = cfg;
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while (wdg_get_sync_busy_flag(wdgp));
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}
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/**
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* @brief Set the watchdog period for the reset operation.
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*
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* @param[in] wdgp pointer to the @p WDGDriver object
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*/
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static void wdg_set_period(WDGDriver *wdgp) {
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uint8_t cfg = WDT_ENABLE_bm | WDT_CEN_bm | wdgp->config->ntp;
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CCP = CCP_IOREG_gc;
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wdgp->wdg->CTRL = cfg;
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while (wdg_get_sync_busy_flag(wdgp));
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}
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/**
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* @brief Disable Watchdog module.
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*
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* @param[in] wdgp pointer to the @p WDGDriver object
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*/
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static void wdg_disable(WDGDriver *wdgp) {
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uint8_t cfg = (wdgp->wdg->CTRL & ~WDT_ENABLE_bm) | WDT_CEN_bm;
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CCP = CCP_IOREG_gc;
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wdgp->wdg->CTRL = cfg;
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}
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/**
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* @brief Return status of window mode enable bit.
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*
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* @param[in] wdgp pointer to the @p WDGDriver object
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* @return The status of the watchdog module
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* @retval true The WD Window Mode is enabled.
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* @retval false The WD Eindow Mode is not enabled.
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*/
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/*static bool wdg_is_window_mode_enabled(WDGDriver *wdgp) {
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if (wdgp->wdg->WINCTRL & WDT_WEN_bm)
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return true;
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else
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return false;
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}
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*/
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/**
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* @brief Enable watchdog window mode.
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*
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* @param[in] wdgp pointer to the @p WDGDriver object
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* @return wd_enble status of the watchdog before the operation
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* @retval true The WD is enabled before enabling window mode.
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* @retval false The WD is not enabled before enabling window mode.
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*/
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static bool wdg_enable_window_mode(WDGDriver *wdgp) {
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uint8_t wdStatus = wdgp->wdg->CTRL & WDT_ENABLE_bm;
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uint8_t cfg = wdgp->wdg->WINCTRL | WDT_WEN_bm | WDT_WCEN_bm;
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CCP = CCP_IOREG_gc;
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wdgp->wdg->WINCTRL = cfg;
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while (wdg_get_sync_busy_flag(wdgp));
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return wdStatus;
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}
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/**
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* @brief Enable window mode and set period.
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*
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* @param[in] wdgp pointer to the @p WDGDriver object
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* @return The satus of the watchdog before this operation
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* @retval true The WD is enabled before enabling window mode.
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* @retval false The WD is not enabled before enabling window mode.
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*/
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static bool wdg_set_window_period(WDGDriver *wdgp) {
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uint8_t wdStatus = wdgp->wdg->CTRL & WDT_ENABLE_bm;
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uint8_t cfg = WDT_WEN_bm | WDT_WCEN_bm | wdgp->config->ntp;
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CCP = CCP_IOREG_gc;
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wdgp->wdg->WINCTRL = cfg;
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while (wdg_get_sync_busy_flag(wdgp));
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return wdStatus;
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}
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/**
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* @brief Disable window mode.
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*
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* @param[in] wdgp pointer to the @p WDGDriver object
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*/
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static void wdg_disable_window_mode(WDGDriver *wdgp) {
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uint8_t cfg = (wdgp->wdg->WINCTRL & ~WDT_WEN_bm) | WDT_WCEN_bm;
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CCP = CCP_IOREG_gc;
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wdgp->wdg->WINCTRL = cfg;
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}
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/**
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* @brief Low level reset of the Watchgot timer by software.
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*
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* @param[in] wdgp pointer to the @p WDGDriver object
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*/
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static void wdg_reset(WDGDriver *wdgp) {
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(void)wdgp;
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asm("wdr"); /* The reset is made by calling WDR instruction. */
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}
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/*==========================================================================*/
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/* Driver interrupt handlers. */
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/*==========================================================================*/
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/*==========================================================================*/
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/* Driver exported functions. */
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/*==========================================================================*/
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/**
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* @brief Low level WDG driver initialization.
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*
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* @notapi
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*/
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void wdg_lld_init(void) {
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#if AVR_WDG_USE_WDT
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WDTD1.state = WDG_STOP;
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WDTD1.wdg = &WDT;
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#endif
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/* TODO: See if the configuration of the watchgod must
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* be done with a default configuration.
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*/
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}
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/**
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* @brief Configures and activates the WDG peripheral.
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*
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* @param[in] wdgp pointer to the @p WDGDriver object
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*
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* @notapi
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*/
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void wdg_lld_start(WDGDriver *wdgp) {
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/* TODO: Use the wdgp->state to see if it is a start or a restart
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* and look what to do
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*/
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if (wdgp->config->mode) {
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wdg_set_window_period(wdgp);
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wdg_enable_window_mode(wdgp);
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}
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else {
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wdg_set_period(wdgp);
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wdg_enable(wdgp);
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}
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while (wdg_get_sync_busy_flag(wdgp));
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}
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/**
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* @brief Deactivates the WDG peripheral.
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*
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* @param[in] wdgp pointer to the @p WDGDriver object
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*
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* @notapi
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*/
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void wdg_lld_stop(WDGDriver *wdgp) {
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if (wdgp->config->mode) {
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wdg_disable_window_mode(wdgp);
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}
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else {
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wdg_disable(wdgp);
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}
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}
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/**
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* @brief Reloads WDG's counter.
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*
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* @param[in] wdgp pointer to the @p WDGDriver object
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*
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* @notapi
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*/
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void wdg_lld_reset(WDGDriver *wdgp) {
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wdg_reset(wdgp);
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}
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#endif /* HAL_USE_WDG */
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/** @} */
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@ -0,0 +1,139 @@
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/*
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ChibiOS - Copyright (C) 2016..2018 Theodore Ateba
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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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,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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/**
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* @file WDGv1/hal_wdg_lld.h
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* @brief WDG Driver subsystem low level driver header.
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*
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* @addtogroup WDG
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* @{
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*/
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#ifndef HAL_WDG_LLD_H
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#define HAL_WDG_LLD_H
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#if (HAL_USE_WDG == TRUE) || defined(__DOXYGEN__)
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/*==========================================================================*/
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/* Driver constants. */
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/*==========================================================================*/
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/*==========================================================================*/
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/* Driver pre-compile time settings. */
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/*==========================================================================*/
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/**
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* @name Configuration options
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* @{
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*/
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/**
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* @brief WDT driver enable switch.
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* @note The default is @p FALSE.
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*/
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#if !defined(AVR_WDG_USE_WDT) || defined(__DOXYGEN__)
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#define AVR_WDG_USE_WDT FALSE
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#endif
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/** @} */
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/*==========================================================================*/
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/* Derived constants and error checks. */
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/*==========================================================================*/
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#define AVR_HAS_WDG TRUE
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#if AVR_WDG_USE_WDT && !AVR_HAS_WDG
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#error "WDT not present in the selected device"
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#endif
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#if !AVR_WDG_USE_WDT
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#error "WDT driver activated but no WDT peripheral assigned"
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#endif
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/*==========================================================================*/
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/* Driver data structures and types. */
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/*==========================================================================*/
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/**
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* @brief Type of a structure representing an WDG driver.
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*/
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typedef struct WDGDriver WDGDriver;
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/**
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* @brief Driver configuration structure.
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* @note It could be empty on some architectures.
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*/
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typedef struct {
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/**
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* @brief Configuration of the WDT driver mode.
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*/
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bool mode;
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/**
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* @brief Configuration of the WDT driver Nomal timeout period.
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*/
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WDT_PER_t ntp;
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/**
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* @brief Configuration of the WDT driver Closed timeout period.
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*/
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WDT_WPER_t ctp;
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} WDGConfig;
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/**
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* @brief Structure representing an WDG driver.
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*/
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struct WDGDriver {
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/**
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* @brief Driver state.
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*/
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wdgstate_t state;
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/**
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* @brief Current configuration data.
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*/
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const WDGConfig *config;
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/* End of the mandatory fields. */
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/**
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* @brief Pointer to the WDG*T registers block.
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*/
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WDT_t *wdg;
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};
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/*==========================================================================*/
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/* Driver macros. */
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/*==========================================================================*/
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/*==========================================================================*/
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/* External declarations. */
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/*==========================================================================*/
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#if (AVR_WDG_USE_WDT == TRUE) && !defined(__DOXYGEN__)
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extern WDGDriver WDTD1;
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#endif
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#ifdef __cplusplus
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extern "C" {
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#endif
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void wdg_lld_init(void);
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void wdg_lld_start(WDGDriver *wdgp);
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void wdg_lld_stop(WDGDriver *wdgp);
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void wdg_lld_reset(WDGDriver *wdgp);
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#ifdef __cplusplus
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}
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#endif
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#endif /* HAL_USE_WDG == TRUE */
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#endif /* HAL_WDG_LLD_H */
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/** @} */
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