mirror of https://github.com/ARMmbed/mbed-os.git
118 lines
3.6 KiB
C
118 lines
3.6 KiB
C
/*******************************************************************************
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* Copyright (c) Maxim Integrated Products, Inc., All Rights Reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included
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* in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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* IN NO EVENT SHALL MAXIM INTEGRATED BE LIABLE FOR ANY CLAIM, DAMAGES
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* OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
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* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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* OTHER DEALINGS IN THE SOFTWARE.
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*
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* Except as contained in this notice, the name of Maxim Integrated
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* Products, Inc. shall not be used except as stated in the Maxim Integrated
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* Products, Inc. Branding Policy.
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*
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* The mere transfer of this software does not imply any licenses
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* of trade secrets, proprietary technology, copyrights, patents,
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* trademarks, maskwork rights, or any other form of intellectual
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* property whatsoever. Maxim Integrated Products, Inc. retains all
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* ownership rights.
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*******************************************************************************
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*/
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#ifdef DEVICE_WATCHDOG
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#include "watchdog_api.h"
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#include "mbed_error.h"
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#include "mxc_sys.h"
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#include "wdt_regs.h"
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#include "wdt.h"
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#include "system_max32660.h"
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watchdog_status_t hal_watchdog_init(const watchdog_config_t *config)
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{
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int i;
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// WDT Disable
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MXC_WDT_Disable(MXC_WDT0);
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uint32_t number_of_tick = ( (float)config->timeout_ms * (float)PeripheralClock) /1000;
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// Find top bit index
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for (i=31; i >= 16; i--) {
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if ( number_of_tick & (1<<i) ) {
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if (number_of_tick & ~(1<<i)) {
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i+=1; // round up if is there any more tick
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}
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break;
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}
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}
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if (i > 31) {
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i = 31; // max
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} else if (i < 16) {
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i = 16; // min
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}
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MXC_WDT_SetResetPeriod(MXC_WDT0, (mxc_wdt_period_t)(31-i) );
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hal_watchdog_kick();
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// WDT Enable RESET
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MXC_WDT_EnableReset(MXC_WDT0);
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// WDT Enable
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MXC_WDT_Enable(MXC_WDT0);
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return WATCHDOG_STATUS_OK;
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}
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void hal_watchdog_kick(void)
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{
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MXC_WDT0->rst = 0x00A5;
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MXC_WDT0->rst = 0x005A;
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}
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watchdog_status_t hal_watchdog_stop(void)
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{
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MXC_WDT_Disable(MXC_WDT0);
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return WATCHDOG_STATUS_OK;
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}
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uint32_t hal_watchdog_get_reload_value(void)
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{
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uint32_t rst_period = (MXC_WDT0->ctrl & MXC_F_WDT_CTRL_RST_PERIOD) >> MXC_F_WDT_CTRL_RST_PERIOD_POS;
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uint32_t val = (1<<(31-rst_period));
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return ( (float)val / (float)PeripheralClock) * 1000;
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}
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watchdog_features_t hal_watchdog_get_platform_features(void)
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{
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uint32_t max_wdt_val = 1<<31; // max val
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watchdog_features_t features;
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features.max_timeout = ((float)max_wdt_val / (float)PeripheralClock)*1000;
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features.update_config = true;
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features.disable_watchdog = true;
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features.clock_typical_frequency = PeripheralClock;
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features.clock_max_frequency = PeripheralClock;
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return features;
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}
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#endif // DEVICE_WATCHDOG
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