1 /*!
2 \file gd32f3x0_wwdgt.c
3 \brief WWDGT driver
4
5 \version 2017-06-06, V1.0.0, firmware for GD32F3x0
6 \version 2019-06-01, V2.0.0, firmware for GD32F3x0
7 \version 2020-09-30, V2.1.0, firmware for GD32F3x0
8 */
9
10 /*
11 Copyright (c) 2020, GigaDevice Semiconductor Inc.
12
13 Redistribution and use in source and binary forms, with or without modification,
14 are permitted provided that the following conditions are met:
15
16 1. Redistributions of source code must retain the above copyright notice, this
17 list of conditions and the following disclaimer.
18 2. Redistributions in binary form must reproduce the above copyright notice,
19 this list of conditions and the following disclaimer in the documentation
20 and/or other materials provided with the distribution.
21 3. Neither the name of the copyright holder nor the names of its contributors
22 may be used to endorse or promote products derived from this software without
23 specific prior written permission.
24
25 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
26 AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
27 WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
28 IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
29 INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
30 NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
31 PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
32 WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
33 ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
34 OF SUCH DAMAGE.
35 */
36
37 #include "gd32f3x0_wwdgt.h"
38 #include "gd32f3x0_rcu.h"
39
40 /*!
41 \brief reset the window watchdog timer configuration
42 \param[in] none
43 \param[out] none
44 \retval none
45 */
wwdgt_deinit(void)46 void wwdgt_deinit(void)
47 {
48 rcu_periph_reset_enable(RCU_WWDGTRST);
49 rcu_periph_reset_disable(RCU_WWDGTRST);
50 }
51
52 /*!
53 \brief start the window watchdog timer counter
54 \param[in] none
55 \param[out] none
56 \retval none
57 */
wwdgt_enable(void)58 void wwdgt_enable(void)
59 {
60 WWDGT_CTL |= WWDGT_CTL_WDGTEN;
61 }
62
63 /*!
64 \brief configure the window watchdog timer counter value
65 \param[in] counter_value: 0x00 - 0x7F
66 \param[out] none
67 \retval none
68 */
wwdgt_counter_update(uint16_t counter_value)69 void wwdgt_counter_update(uint16_t counter_value)
70 {
71 uint32_t reg = 0x0U;
72
73 reg = WWDGT_CTL &(~(uint32_t)WWDGT_CTL_CNT);
74 reg |= (uint32_t)(CTL_CNT(counter_value));
75
76 WWDGT_CTL = (uint32_t)reg;
77 }
78
79 /*!
80 \brief configure counter value, window value, and prescaler divider value
81 \param[in] counter: 0x00 - 0x7F
82 \param[in] window: 0x00 - 0x7F
83 \param[in] prescaler: wwdgt prescaler value
84 only one parameter can be selected which is shown as below:
85 \arg WWDGT_CFG_PSC_DIV1: the time base of window watchdog counter = (PCLK1/4096)/1
86 \arg WWDGT_CFG_PSC_DIV2: the time base of window watchdog counter = (PCLK1/4096)/2
87 \arg WWDGT_CFG_PSC_DIV4: the time base of window watchdog counter = (PCLK1/4096)/4
88 \arg WWDGT_CFG_PSC_DIV8: the time base of window watchdog counter = (PCLK1/4096)/8
89 \param[out] none
90 \retval none
91 */
wwdgt_config(uint16_t counter,uint16_t window,uint32_t prescaler)92 void wwdgt_config(uint16_t counter, uint16_t window, uint32_t prescaler)
93 {
94 uint32_t reg_cfg = 0x0U, reg_ctl = 0x0U;
95
96 /* clear WIN and PSC bits, clear CNT bit */
97 reg_cfg = WWDGT_CFG &(~((uint32_t)WWDGT_CFG_WIN|(uint32_t)WWDGT_CFG_PSC));
98 reg_ctl = WWDGT_CTL &(~(uint32_t)WWDGT_CTL_CNT);
99
100 /* configure WIN and PSC bits, configure CNT bit */
101 reg_cfg |= (uint32_t)(CFG_WIN(window));
102 reg_cfg |= (uint32_t)(prescaler);
103 reg_ctl |= (uint32_t)(CTL_CNT(counter));
104
105 WWDGT_CFG = (uint32_t)reg_cfg;
106 WWDGT_CTL = (uint32_t)reg_ctl;
107 }
108
109 /*!
110 \brief enable early wakeup interrupt of WWDGT
111 \param[in] none
112 \param[out] none
113 \retval none
114 */
wwdgt_interrupt_enable(void)115 void wwdgt_interrupt_enable(void)
116 {
117 WWDGT_CFG |= WWDGT_CFG_EWIE;
118 }
119
120 /*!
121 \brief check early wakeup interrupt state of WWDGT
122 \param[in] none
123 \param[out] none
124 \retval FlagStatus: SET or RESET
125 */
wwdgt_flag_get(void)126 FlagStatus wwdgt_flag_get(void)
127 {
128 if(WWDGT_STAT & WWDGT_STAT_EWIF){
129 return SET;
130 }
131 return RESET;
132 }
133
134 /*!
135 \brief clear early wakeup interrupt state of WWDGT
136 \param[in] none
137 \param[out] none
138 \retval none
139 */
wwdgt_flag_clear(void)140 void wwdgt_flag_clear(void)
141 {
142 WWDGT_STAT &= (uint32_t)(~(uint32_t)WWDGT_STAT_EWIF);
143 }
144
