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147 lines
4.5 KiB
147 lines
4.5 KiB
/*!
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\file gd32vf103_wwdgt.c
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\brief WWDGT driver
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\version 2019-06-05, V1.0.0, firmware for GD32VF103
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*/
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/*
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Copyright (c) 2019, GigaDevice Semiconductor Inc.
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Redistribution and use in source and binary forms, with or without modification,
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are permitted provided that the following conditions are met:
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1. Redistributions of source code must retain the above copyright notice, this
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list of conditions and the following disclaimer.
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2. Redistributions in binary form must reproduce the above copyright notice,
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this list of conditions and the following disclaimer in the documentation
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and/or other materials provided with the distribution.
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3. Neither the name of the copyright holder nor the names of its contributors
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may be used to endorse or promote products derived from this software without
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specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
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INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
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OF SUCH DAMAGE.
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*/
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#include "gd32vf103_wwdgt.h"
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/* write value to WWDGT_CTL_CNT bit field */
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#define CTL_CNT(regval) (BITS(0,6) & ((uint32_t)(regval) << 0))
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/* write value to WWDGT_CFG_WIN bit field */
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#define CFG_WIN(regval) (BITS(0,6) & ((uint32_t)(regval) << 0))
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/*!
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\brief reset the window watchdog timer configuration
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\param[in] none
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\param[out] none
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\retval none
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*/
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void wwdgt_deinit(void)
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{
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rcu_periph_reset_enable(RCU_WWDGTRST);
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rcu_periph_reset_disable(RCU_WWDGTRST);
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}
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/*!
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\brief start the window watchdog timer counter
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\param[in] none
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\param[out] none
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\retval none
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*/
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void wwdgt_enable(void)
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{
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WWDGT_CTL |= WWDGT_CTL_WDGTEN;
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}
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/*!
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\brief configure the window watchdog timer counter value
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\param[in] counter_value: 0x00 - 0x7F
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\param[out] none
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\retval none
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*/
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void wwdgt_counter_update(uint16_t counter_value)
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{
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uint32_t reg = 0U;
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reg = (WWDGT_CTL & (~WWDGT_CTL_CNT));
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reg |= CTL_CNT(counter_value);
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WWDGT_CTL = reg;
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}
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/*!
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\brief configure counter value, window value, and prescaler divider value
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\param[in] counter: 0x00 - 0x7F
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\param[in] window: 0x00 - 0x7F
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\param[in] prescaler: wwdgt prescaler value
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only one parameter can be selected which is shown as below:
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\arg WWDGT_CFG_PSC_DIV1: the time base of window watchdog counter = (PCLK1/4096)/1
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\arg WWDGT_CFG_PSC_DIV2: the time base of window watchdog counter = (PCLK1/4096)/2
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\arg WWDGT_CFG_PSC_DIV4: the time base of window watchdog counter = (PCLK1/4096)/4
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\arg WWDGT_CFG_PSC_DIV8: the time base of window watchdog counter = (PCLK1/4096)/8
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\param[out] none
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\retval none
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*/
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void wwdgt_config(uint16_t counter, uint16_t window, uint32_t prescaler)
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{
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uint32_t reg_cfg = 0U, reg_ctl = 0U;
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/* clear WIN and PSC bits, clear CNT bit */
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reg_cfg = (WWDGT_CFG &(~(WWDGT_CFG_WIN|WWDGT_CFG_PSC)));
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reg_ctl = (WWDGT_CTL &(~WWDGT_CTL_CNT));
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/* configure WIN and PSC bits, configure CNT bit */
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reg_cfg |= CFG_WIN(window);
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reg_cfg |= prescaler;
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reg_ctl |= CTL_CNT(counter);
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WWDGT_CTL = reg_ctl;
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WWDGT_CFG = reg_cfg;
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}
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/*!
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\brief enable early wakeup interrupt of WWDGT
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\param[in] none
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\param[out] none
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\retval none
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*/
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void wwdgt_interrupt_enable(void)
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{
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WWDGT_CFG |= WWDGT_CFG_EWIE;
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}
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/*!
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\brief check early wakeup interrupt state of WWDGT
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\param[in] none
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\param[out] none
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\retval FlagStatus: SET or RESET
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*/
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FlagStatus wwdgt_flag_get(void)
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{
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if(WWDGT_STAT & WWDGT_STAT_EWIF){
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return SET;
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}
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return RESET;
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}
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/*!
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\brief clear early wakeup interrupt state of WWDGT
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\param[in] none
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\param[out] none
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\retval none
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*/
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void wwdgt_flag_clear(void)
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{
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WWDGT_STAT &= (~WWDGT_STAT_EWIF);
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}
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