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Tiva. WDG. Added watchdog low level driver.

This commit is contained in:
marcoveeneman 2016-04-06 21:20:35 +02:00
parent beff5671d4
commit eb960077b8
3 changed files with 430 additions and 1 deletions
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241
os/hal/ports/TIVA/LLD/hal_wdg_lld.c Normal file
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/*
Copyright (C) 2014 Marco Veeneman
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 TIVA/wdg_lld.c
* @brief WDG Driver subsystem low level driver source.
*
* @addtogroup WDG
* @{
*/
#include "hal.h"
#if HAL_USE_WDG || defined(__DOXYGEN__)
/*===========================================================================*/
/* Driver local definitions. */
/*===========================================================================*/
/*===========================================================================*/
/* Driver exported variables. */
/*===========================================================================*/
#if TIVA_WDG_USE_WDT0 || defined(__DOXYGEN__)
WDGDriver WDGD1;
#endif /* TIVA_WDG_USE_WDT0 */
#if TIVA_WDG_USE_WDT1 || defined(__DOXYGEN__)
WDGDriver WDGD2;
#endif /* TIVA_WDG_USE_WDT1 */
/*===========================================================================*/
/* Driver local variables. */
/*===========================================================================*/
/*===========================================================================*/
/* Driver local functions. */
/*===========================================================================*/
/**
* @brief Shared IRQ handler.
*
* @param[in] wdgp pointer to @p WDGDriver object.
*/
static void serve_interrupt(WDGDriver *wdgp)
{
uint32_t mis;
mis = wdgp->wdt->MIS;
if (mis & MIS_WDTMIS) {
/* Invoke callback, if any */
if (wdgp->config->callback) {
if (wdgp->config->callback(wdgp)) {
/* Clear interrupt */
wdgp->wdt->ICR = 0;
wdgTivaSyncWrite(wdgp);
}
}
}
}
/*===========================================================================*/
/* Driver interrupt handlers. */
/*===========================================================================*/
#if TIVA_WDG_USE_WDT0 || TIVA_WDG_USE_WDT1
/**
* @brief WDT0/WDT1 interrupt handler.
*
* @isr
*/
OSAL_IRQ_HANDLER(TIVA_WDT_HANDLER)
{
OSAL_IRQ_PROLOGUE();
#if TIVA_WDG_USE_WDT0
serve_interrupt(&WDGD1);
#endif
#if TIVA_WDG_USE_WDT1
serve_interrupt(&WDGD2);
#endif
OSAL_IRQ_EPILOGUE();
}
#endif /* TIVA_WDG_USE_WDT0 || TIVA_WDG_USE_WDT1 */
/*===========================================================================*/
/* Driver exported functions. */
/*===========================================================================*/
/**
* @brief Low level WDG driver initialization.
*
* @notapi
*/
void wdg_lld_init(void)
{
#if TIVA_WDG_USE_WDT0
WDGD1.state = WDG_STOP;
WDGD1.wdt = WDT0;
#endif /* TIVA_WDG_USE_WDT0 */
#if TIVA_WDG_USE_WDT1
WDGD2.state = WDG_STOP;
WDGD2.wdt = WDT1;
#endif /* TIVA_WDG_USE_WDT1 */
/* The shared vector is initialized on driver initialization and never
disabled because it is shared between the Watchdog Timers.*/
nvicEnableVector(TIVA_WDT_NUMBER, TIVA_WDG_WDT_IRQ_PRIORITY);
}
/**
* @brief Configures and activates the WDG peripheral.
*
* @param[in] wdgp pointer to the @p WDGDriver object
*
* @notapi
*/
void wdg_lld_start(WDGDriver *wdgp)
{
#if TIVA_WDG_USE_WDT0
if (&WDGD1 == wdgp) {
SYSCTL->RCGCWD |= (1 << 0);
while (!(SYSCTL->PRWD & (1 << 0)))
;
}
#endif /* TIVA_WDG_USE_WDT0 */
#if TIVA_WDG_USE_WDT1
if (&WDGD2 == wdgp) {
SYSCTL->RCGCWD |= (1 << 1);
while (!(SYSCTL->PRWD & (1 << 1)))
;
}
#endif /* TIVA_WDG_USE_WDT1 */
wdgp->wdt->LOAD = wdgp->config->load;
wdgTivaSyncWrite(wdgp);
wdgp->wdt->TEST = wdgp->config->test;
wdgTivaSyncWrite(wdgp);
wdgp->wdt->CTL |= CTL_RESEN;
wdgTivaSyncWrite(wdgp);
wdgp->wdt->CTL |= CTL_INTEN;
wdgTivaSyncWrite(wdgp);
}
/**
* @brief Deactivates the WDG peripheral.
*
* @param[in] wdgp pointer to the @p WDGDriver object
*
* @api
*/
void wdg_lld_stop(WDGDriver *wdgp)
{
#if TIVA_WDG_USE_WDT0
if (&WDGD1 == wdgp) {
SYSCTL->SRWD |= (1 << 0);
SYSCTL->SRWD &= ~(1 << 0);
}
#endif /* TIVA_WDG_USE_WDT0 */
#if TIVA_WDG_USE_WDT1
if (&WDGD2 == wdgp) {
SYSCTL->SRWD |= (1 << 1);
SYSCTL->SRWD &= ~(1 << 1);
}
#endif /* TIVA_WDG_USE_WDT1 */
}
/**
* @brief Reloads WDG's counter.
*
* @param[in] wdgp pointer to the @p WDGDriver object
*
* @notapi
*/
void wdg_lld_reset(WDGDriver *wdgp)
{
#if defined(TM4C123_USE_REVISION_6_FIX) || defined(TM4C123_USE_REVISION_7_FIX)
#if TIVA_WDG_USE_WDT1
if (&WDGD2 == wdgp) {
/* Number: WDT#02
* Description: Periodically reloading the count value into the Watchdog
* Timer Load (WDTLOAD) register of the Watchdog Timer 1
* module will not restart the count, as specified in the data
* sheet.
* Workaround: Disable the Watchdog Timer 1 module by setting the
* appropriate bit in the Watchdog Timer Software Reset (SRWD)
* register before reprogramming the counter.*/
wdg_lld_stop(wdgp);
wdg_lld_start(wdgp);
return;
}
#endif /* TIVA_WDG_USE_WDT1 */
#endif /* defined(TM4C123_USE_REVISION_6_FIX) ||
defined(TM4C123_USE_REVISION_7_FIX) */
wdgp->wdt->LOAD = wdgp->config->load;
wdgTivaSyncWrite(wdgp);
}
#endif /* HAL_USE_WDG */
#if TIVA_WDG_USE_WDT1
/**
* @brief synchronize after a write to a watchdog register.
*
* @param[in] wdgp pointer to the @p WDGDriver object.
*/
void wdgTivaSyncWrite(WDGDriver *wdgp)
{
if (&WDGD2 == wdgp) {
while (!(wdgp->wdt->CTL & CTL_WRC)) {
;
}
}
}
#endif /* TIVA_WDG_USE_WDT1 */
/** @} */

187
os/hal/ports/TIVA/LLD/hal_wdg_lld.h Normal file
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/*
Copyright (C) 2014 Marco Veeneman
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 TIVA/wdg_lld.h
* @brief WDG Driver subsystem low level driver header.
*
* @addtogroup WDG
* @{
*/
#ifndef _WDG_LLD_H_
#define _WDG_LLD_H_
#if HAL_USE_WDG || defined(__DOXYGEN__)
/*===========================================================================*/
/* Driver constants. */
/*===========================================================================*/
#define LOCK_UNLOCK 0x1ACCE551U
#define LOCK_LOCK 0x00000000U
#define LOCK_IS_UNLOCKED 0U
#define LOCK_IS_LOCKED 1U
#define TEST_STALL (1 << 8)
#define MIS_WDTMIS (1 << 0)
#define RIS_WDTRIS (1 << 0)
#define ICR_WDTICR (1 << 0)
#define CTL_INTEN (1 << 0)
#define CTL_RESEN (1 << 1)
#define CTL_INTTYPE (1 << 2)
#define CTL_WRC (1 << 31)
/*===========================================================================*/
/* Driver pre-compile time settings. */
/*===========================================================================*/
/**
* @name Configuration options
* @{
*/
/**
* @brief WDT driver enable switch.
* @details If set to @p TRUE the support for WDT is included.
* @note The default is @p FALSE.
*/
#if !defined(TIVA_WDG_USE_WDT) || defined(__DOXYGEN__)
#define TIVA_WDG_USE_WDT FALSE
#endif
/**
* @brief WDT interrupt priority level setting.
*/
#if !defined(TIVA_WDG_WDT_IRQ_PRIORITY) || defined(__DOXYGEN__)
#define TIVA_WDG_WDT_IRQ_PRIORITY 5
#endif
/** @} */
/*===========================================================================*/
/* Derived constants and error checks. */
/*===========================================================================*/
#if TIVA_WDG_USE_WDT0 && !TIVA_HAS_WDT0
#error "WDT0 not present in the selected device"
#endif
#if TIVA_WDG_USE_WDT1 && !TIVA_HAS_WDT1
#error "WDT1 not present in the selected device"
#endif
#if !TIVA_WDG_USE_WDT0 && !TIVA_WDG_USE_WDT1
#error "WDG 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 WDG timeout callback type.
*
* @param[in] wdgp pointer to the @p WDGDriver object triggering the callback.
*/
typedef bool (*wdgcallback_t)(WDGDriver *wdgp);
/**
* @brief Driver configuration structure.
* @note It could be empty on some architectures.
*/
typedef struct
{
/**
* @brief Interval value used by the WDT.
*/
uint32_t load;
/**
* @brief Timeout callback pointer.
* @note This callback is invoked on the first WDT timeout. If set to
* @p NULL then the callback is disabled.
*/
wdgcallback_t callback;
/**
* @brief Test register configuration value.
*/
uint16_t test;
} 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 WDT registers block.
*/
WDT_TypeDef *wdt;
};
/*===========================================================================*/
/* Driver macros. */
/*===========================================================================*/
#if !TIVA_WDG_USE_WDT1
#define wdgTivaSyncWrite(wdt)
#endif
/*===========================================================================*/
/* External declarations. */
/*===========================================================================*/
#if TIVA_WDG_USE_WDT0 && !defined(__DOXYGEN__)
extern WDGDriver WDGD1;
#endif
#if TIVA_WDG_USE_WDT1 && !defined(__DOXYGEN__)
extern WDGDriver WDGD2;
#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);
#if TIVA_WDG_USE_WDT1
void wdgTivaSyncWrite(WDGDriver *wdgp);
#endif
#ifdef __cplusplus
}
#endif
#endif /* HAL_USE_WDG */
#endif /* _WDG_LLD_H_ */
/** @} */

3
os/hal/ports/TIVA/TM4C123x/platform.mk
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@ -9,7 +9,8 @@ PLATFORMSRC = ${CHIBIOS}/os/hal/ports/common/ARMCMx/nvic.c \
${CHIBIOS_CONTRIB}/os/hal/ports/TIVA/LLD/hal_pwm_lld.c \
${CHIBIOS_CONTRIB}/os/hal/ports/TIVA/LLD/hal_spi_lld.c \
${CHIBIOS_CONTRIB}/os/hal/ports/TIVA/LLD/tiva_udma.c \
${CHIBIOS_CONTRIB}/os/hal/ports/TIVA/LLD/hal_ext_lld.c
${CHIBIOS_CONTRIB}/os/hal/ports/TIVA/LLD/hal_ext_lld.c \
${CHIBIOS_CONTRIB}/os/hal/ports/TIVA/LLD/hal_wdg_lld.c
# Required include directories
PLATFORMINC = ${CHIBIOS}/os/hal/ports/common/ARMCMx \