/******************************************************************************* * Copyright (c) Maxim Integrated Products, Inc., All Rights Reserved. * * 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 MAXIM INTEGRATED 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. * * Except as contained in this notice, the name of Maxim Integrated * Products, Inc. shall not be used except as stated in the Maxim Integrated * Products, Inc. Branding Policy. * * The mere transfer of this software does not imply any licenses * of trade secrets, proprietary technology, copyrights, patents, * trademarks, maskwork rights, or any other form of intellectual * property whatsoever. Maxim Integrated Products, Inc. retains all * ownership rights. ******************************************************************************* */ #ifdef DEVICE_WATCHDOG #include "watchdog_api.h" #include "mbed_error.h" #include "mxc_sys.h" #include "wdt_regs.h" #include "wdt.h" #include "system_max32660.h" watchdog_status_t hal_watchdog_init(const watchdog_config_t *config) { int i; // WDT Disable MXC_WDT_Disable(MXC_WDT0); uint32_t number_of_tick = ( (float)config->timeout_ms * (float)PeripheralClock) /1000; // Find top bit index for (i=31; i >= 16; i--) { if ( number_of_tick & (1<<i) ) { if (number_of_tick & ~(1<<i)) { i+=1; // round up if is there any more tick } break; } } if (i > 31) { i = 31; // max } else if (i < 16) { i = 16; // min } MXC_WDT_SetResetPeriod(MXC_WDT0, (mxc_wdt_period_t)(31-i) ); hal_watchdog_kick(); // WDT Enable RESET MXC_WDT_EnableReset(MXC_WDT0); //NVIC_SetVector(WDT0_IRQn, WDT0_IRQHandler); //NVIC_EnableIRQ(WDT0_IRQn); // WDT Enable MXC_WDT_Enable(MXC_WDT0); return WATCHDOG_STATUS_OK; } void hal_watchdog_kick(void) { MXC_WDT0->rst = 0x00A5; MXC_WDT0->rst = 0x005A; } watchdog_status_t hal_watchdog_stop(void) { MXC_WDT_Disable(MXC_WDT0); return WATCHDOG_STATUS_OK; } uint32_t hal_watchdog_get_reload_value(void) { uint32_t rst_period = (MXC_WDT0->ctrl & MXC_F_WDT_CTRL_RST_PERIOD) >> MXC_F_WDT_CTRL_RST_PERIOD_POS; uint32_t val = (1<<(31-rst_period)); return ( (float)val / (float)PeripheralClock) * 1000; } watchdog_features_t hal_watchdog_get_platform_features(void) { uint32_t max_wdt_val = 1<<31; // max val watchdog_features_t features; features.max_timeout = ((float)max_wdt_val / (float)PeripheralClock)*1000; features.update_config = true; features.disable_watchdog = true; features.clock_typical_frequency = PeripheralClock; features.clock_max_frequency = PeripheralClock; return features; } #endif // DEVICE_WATCHDOG