151 lines
4.4 KiB
C
151 lines
4.4 KiB
C
/*
|
|
ChibiOS - Copyright (C) 2016 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 NRF51822/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 NRF5_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 no 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 = (NRF5_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 */
|
|
|
|
/** @} */
|