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/*
* This file is part of the Micro Python project, http://micropython.org/
*
* The MIT License (MIT)
*
* Copyright (c) 2015 Daniel Campora
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#include <stdint.h>
#include "py/mpconfig.h"
#include MICROPY_HAL_H
#include "py/obj.h"
#include "py/runtime.h"
#include "inc/hw_types.h"
#include "inc/hw_gpio.h"
#include "inc/hw_ints.h"
#include "inc/hw_memmap.h"
#include "rom_map.h"
#include "wdt.h"
#include "prcm.h"
#include "utils.h"
#include "pybwdt.h"
/******************************************************************************
DECLARE CONSTANTS
******************************************************************************/
#define PYBWDT_MILLISECONDS_TO_TICKS(ms) ((80000000 / 1000) * (ms))
#define PYBWDT_MIN_TIMEOUT_MS (500)
/******************************************************************************
DECLARE TYPES
******************************************************************************/
typedef struct {
bool servers;
bool simplelink;
bool running;
}pybwdt_data_t;
/******************************************************************************
DECLARE PRIVATE DATA
******************************************************************************/
static pybwdt_data_t pybwdt_data;
/******************************************************************************
DEFINE PUBLIC FUNCTIONS
******************************************************************************/
// must be called in main.c just after initializing the hal
void pybwdt_init0 (void) {
pybwdt_data.running = false;
}
void pybwdt_check_reset_cause (void) {
// if we are recovering from a WDT reset, trigger
// a hibernate cycle for a clean boot
if (MAP_PRCMSysResetCauseGet() == PRCM_WDT_RESET) {
HWREG(0x400F70B8) = 1;
UtilsDelay(800000/5);
HWREG(0x400F70B0) = 1;
UtilsDelay(800000/5);
HWREG(0x4402E16C) |= 0x2;
UtilsDelay(800);
HWREG(0x4402F024) &= 0xF7FFFFFF;
MAP_PRCMHibernateWakeupSourceEnable(PRCM_HIB_SLOW_CLK_CTR);
// set the sleep interval to 10ms
MAP_PRCMHibernateIntervalSet(330);
MAP_PRCMHibernateEnter();
}
}
// minimum timeout value is 500ms
pybwdt_ret_code_t pybwdt_enable (uint32_t timeout) {
if (timeout >= PYBWDT_MIN_TIMEOUT_MS) {
if (!pybwdt_data.running) {
// 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);
// Make the WDT stall when the debugger stops on a breakpoint
MAP_WatchdogStallEnable (WDT_BASE);
// Set the watchdog timer reload value
// the WDT trigger a system reset after the second timeout
// so, divide by the 2 timeout value received
MAP_WatchdogReloadSet(WDT_BASE, PYBWDT_MILLISECONDS_TO_TICKS(timeout / 2));
// Start the timer. Once the timer is started, it cannot be disabled.
MAP_WatchdogEnable(WDT_BASE);
pybwdt_data.running = true;
return E_PYBWDT_OK;
}
return E_PYBWDT_IS_RUNNING;
}
return E_PYBWDT_INVALID_TIMEOUT;
}
void pybwdt_kick (void) {
// check that the servers and simplelink are running fine
if (pybwdt_data.servers && pybwdt_data.simplelink && pybwdt_data.running) {
pybwdt_data.servers = false;
pybwdt_data.simplelink = false;
MAP_WatchdogIntClear(WDT_BASE);
}
}
void pybwdt_srv_alive (void) {
pybwdt_data.servers = true;
}
void pybwdt_sl_alive (void) {
pybwdt_data.simplelink = true;
}
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