| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you 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. |
| */ |
| |
| #include <assert.h> |
| #include "hal/hal_watchdog.h" |
| #include "mcu/mcu.h" |
| |
| static uint32_t g_hal_watchdog_reload_val; |
| |
| int |
| hal_watchdog_init(uint32_t expire_msecs) |
| { |
| SYS_WDOG->WATCHDOG_CTRL_REG = SYS_WDOG_WATCHDOG_CTRL_REG_WDOG_FREEZE_EN_Msk; |
| GPREG->SET_FREEZE_REG |= GPREG_SET_FREEZE_REG_FRZ_SYS_WDOG_Msk; |
| |
| #if MYNEWT_VAL_CHOICE(MCU_LPCLK_SOURCE, RCX) |
| g_hal_watchdog_reload_val = expire_msecs / 21; |
| #else |
| g_hal_watchdog_reload_val = expire_msecs / 10; |
| #endif |
| assert((g_hal_watchdog_reload_val & 0xFFFFC000) == 0); |
| |
| while (SYS_WDOG->WATCHDOG_CTRL_REG & SYS_WDOG_WATCHDOG_CTRL_REG_WRITE_BUSY_Msk) { |
| /* wait */ |
| } |
| SYS_WDOG->WATCHDOG_REG = g_hal_watchdog_reload_val; |
| |
| return 0; |
| } |
| |
| void |
| hal_watchdog_enable(void) |
| { |
| GPREG->RESET_FREEZE_REG |= GPREG_RESET_FREEZE_REG_FRZ_SYS_WDOG_Msk; |
| } |
| |
| void |
| hal_watchdog_tickle(void) |
| { |
| while (SYS_WDOG->WATCHDOG_CTRL_REG & SYS_WDOG_WATCHDOG_CTRL_REG_WRITE_BUSY_Msk) { |
| /* wait */ |
| } |
| SYS_WDOG->WATCHDOG_REG = g_hal_watchdog_reload_val; |
| } |