ERROR_CODE ineedmd_watchdog_debug_mode(void)
{
#ifdef USING_TIRTOS
ERROR_CODE eEC = ER_OK;
params.debugStallMode = Watchdog_DEBUG_STALL_ON;
return eEC;
#else
ERROR_CODE eEC = ER_OK;
MAP_WatchdogStallEnable(WD_BASE);
//todo: see if wd reg changes with the rom call and can be measured
return eEC;
#endif
}
void hw_watchdog_init()
{
// Startup watchdog timer
MAP_SysCtlPeripheralEnable(SYSCTL_PERIPH_WDOG0);
MAP_WatchdogReloadSet(WATCHDOG0_BASE, MAP_SysCtlClockGet() * 8); // 8s
MAP_WatchdogResetEnable(WATCHDOG0_BASE);
#ifdef DEBUG
MAP_WatchdogStallEnable(WATCHDOG0_BASE);
#endif // DEBUG
MAP_IntEnable(INT_WATCHDOG);
MAP_WatchdogEnable(WATCHDOG0_BASE); // can not be disabled
hw_watchdog_clear();
}
STATIC mp_obj_t pyb_wdt_make_new(const mp_obj_type_t *type, size_t n_args, size_t n_kw, const mp_obj_t *all_args) {
// check the arguments
mp_map_t kw_args;
mp_map_init_fixed_table(&kw_args, n_kw, all_args + n_args);
mp_arg_val_t args[MP_ARRAY_SIZE(pyb_wdt_init_args)];
mp_arg_parse_all(n_args, all_args, &kw_args, MP_ARRAY_SIZE(args), pyb_wdt_init_args, args);
if (args[0].u_obj != mp_const_none && mp_obj_get_int(args[0].u_obj) > 0) {
mp_raise_msg(&mp_type_OSError, mpexception_os_resource_not_avaliable);
}
uint timeout_ms = args[1].u_int;
if (timeout_ms < PYBWDT_MIN_TIMEOUT_MS) {
mp_raise_ValueError(mpexception_value_invalid_arguments);
}
if (pyb_wdt_obj.running) {
mp_raise_msg(&mp_type_OSError, mpexception_os_request_not_possible);
}
// Enable the WDT peripheral clock
MAP_PRCMPeripheralClkEnable(PRCM_WDT, PRCM_RUN_MODE_CLK | PRCM_SLP_MODE_CLK);
// Unlock to be able to configure the registers
MAP_WatchdogUnlock(WDT_BASE);
#ifdef DEBUG
// make the WDT stall when the debugger stops on a breakpoint
MAP_WatchdogStallEnable (WDT_BASE);
#endif
// set the watchdog timer reload value
// the WDT trigger a system reset after the second timeout
// so, divide by 2 the timeout value received
MAP_WatchdogReloadSet(WDT_BASE, PYBWDT_MILLISECONDS_TO_TICKS(timeout_ms / 2));
// start the timer. Once it's started, it cannot be disabled.
MAP_WatchdogEnable(WDT_BASE);
pyb_wdt_obj.base.type = &pyb_wdt_type;
pyb_wdt_obj.running = true;
return (mp_obj_t)&pyb_wdt_obj;
}
void
watchdog_init(void)
{
MAP_SysCtlPeripheralEnable(SYSCTL_PERIPH_WDOG0);
delay_us(5);
/*
* Check to see if the registers are locked, and if so, unlock them.
* Locking prevents stray access from modifying register content
*/
if(MAP_WatchdogLockState(WATCHDOG0_BASE) == true)
{
MAP_WatchdogUnlock(WATCHDOG0_BASE);
}
MAP_IntEnable(INT_WATCHDOG);
/* Prevent watchdog reset during debugging */
MAP_WatchdogStallEnable(WATCHDOG0_BASE);
/* 2 seconds */
MAP_WatchdogReloadSet(WATCHDOG0_BASE, (MAP_SysCtlClockGet() * 2));
MAP_WatchdogResetEnable(WATCHDOG0_BASE);
}
Thread::Error Watchdog::start() {
MAP_PRCMPeripheralClkEnable(PRCM_WDT, PRCM_RUN_MODE_CLK);
MAP_WatchdogUnlock(WDT_BASE);
MAP_WatchdogStallEnable(WDT_BASE);
MAP_IntPrioritySet(INT_WDT, INT_PRIORITY_LVL_1);
MAP_WatchdogIntRegister(WDT_BASE, isr);
MAP_WatchdogReloadSet(WDT_BASE, 240000000UL);
MAP_WatchdogEnable(WDT_BASE);
Thread::Error err = Thread::start();
if (err != Thread::kOK)
stop();
return err;
}