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Merge pull request #1195 from bkozak-scanimetrics/cc26xx_improve_watchdog

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CC26xx - various fixes and improvements for the watchdog module
This commit is contained in:
George Oikonomou 2015-09-04 17:20:50 +01:00
commit dd640cd229
1 changed files with 75 additions and 2 deletions
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77
cpu/cc26xx-cc13xx/dev/contiki-watchdog.c
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@ -42,8 +42,61 @@
* \file
* Implementation of the CC13xx/CC26xx watchdog driver.
*/
#include "watchdog.h"
#include "contiki.h"
#include "dev/watchdog.h"
#include "ti-lib.h"
#include <stdbool.h>
#include <stdint.h>
/*---------------------------------------------------------------------------*/
#ifdef CONTIKI_WATCHDOG_CONF_TIMER_TOP
#define CONTIKI_WATCHDOG_TIMER_TOP CONTIKI_WATCHDOG_CONF_TIMER_TOP
#else
#define CONTIKI_WATCHDOG_TIMER_TOP 0xFFFFF
#endif
#ifdef CONTIKI_WATCHDOG_CONF_LOCK_CONFIG
#define CONTIKI_WATCHDOG_LOCK_CONFIG CONTIKI_WATCHDOG_CONF_LOCK_CONFIG
#else
#define CONTIKI_WATCHDOG_LOCK_CONFIG 1
#endif
#define LOCK_INTERRUPTS_DISABLED 0x01
#define LOCK_REGISTERS_UNLOCKED 0x02
/*---------------------------------------------------------------------------*/
static uint32_t
unlock_config(void)
{
uint32_t ret = 0;
bool int_status;
if(CONTIKI_WATCHDOG_LOCK_CONFIG) {
int_status = ti_lib_int_master_disable();
if(ti_lib_watchdog_lock_state()) {
ret |= LOCK_REGISTERS_UNLOCKED;
ti_lib_watchdog_unlock();
}
ret |= (int_status) ? (0) : (LOCK_INTERRUPTS_DISABLED);
}
return ret;
}
/*---------------------------------------------------------------------------*/
static void
lock_config(uint32_t status)
{
if(CONTIKI_WATCHDOG_LOCK_CONFIG) {
if(status & LOCK_REGISTERS_UNLOCKED) {
ti_lib_watchdog_lock();
}
if(status & LOCK_INTERRUPTS_DISABLED) {
ti_lib_int_master_enable();
}
}
}
/*---------------------------------------------------------------------------*/
/**
* \brief Initialises the CC26xx WDT
@ -54,7 +107,8 @@
void
watchdog_init(void)
{
ti_lib_watchdog_reload_set(0xFFFFF);
ti_lib_watchdog_reload_set(CONTIKI_WATCHDOG_TIMER_TOP);
lock_config(LOCK_REGISTERS_UNLOCKED);
}
/*---------------------------------------------------------------------------*/
/**
@ -63,7 +117,12 @@ watchdog_init(void)
void
watchdog_start(void)
{
uint32_t lock_status = unlock_config();
watchdog_periodic();
ti_lib_watchdog_reset_enable();
lock_config(lock_status);
}
/*---------------------------------------------------------------------------*/
/**
@ -72,9 +131,23 @@ watchdog_start(void)
void
watchdog_periodic(void)
{
ti_lib_watchdog_reload_set(CONTIKI_WATCHDOG_TIMER_TOP);
ti_lib_watchdog_int_clear();
}
/*---------------------------------------------------------------------------*/
/**
* \brief Stops the WDT such that it won't timeout and cause MCU reset
*/
void
watchdog_stop(void)
{
uint32_t lock_status = unlock_config();
ti_lib_watchdog_reset_disable();
lock_config(lock_status);
}
/*---------------------------------------------------------------------------*/
/**
* \brief Manually trigger a WDT reboot
*/