123 lines
2.9 KiB
C
123 lines
2.9 KiB
C
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/*!
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\file gd32f4xx_wwdgt.c
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\brief WWDGT driver
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*/
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/*
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Copyright (C) 2016 GigaDevice
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2016-08-15, V1.0.0, firmware for GD32F4xx
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*/
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#include "gd32f4xx_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 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 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 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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\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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