1 /*!
2 \file gd32e10x_fwdgt.c
3 \brief FWDGT driver
4
5 \version 2017-12-26, V1.0.0, firmware for GD32E10x
6 \version 2020-09-30, V1.1.0, firmware for GD32E10x
7 \version 2020-12-31, V1.2.0, firmware for GD32E10x
8 \version 2022-06-30, V1.3.0, firmware for GD32E10x
9 */
10
11 /*
12 Copyright (c) 2022, GigaDevice Semiconductor Inc.
13
14 Redistribution and use in source and binary forms, with or without modification,
15 are permitted provided that the following conditions are met:
16
17 1. Redistributions of source code must retain the above copyright notice, this
18 list of conditions and the following disclaimer.
19 2. Redistributions in binary form must reproduce the above copyright notice,
20 this list of conditions and the following disclaimer in the documentation
21 and/or other materials provided with the distribution.
22 3. Neither the name of the copyright holder nor the names of its contributors
23 may be used to endorse or promote products derived from this software without
24 specific prior written permission.
25
26 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
27 AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
28 WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
29 IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
30 INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
31 NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
32 PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
33 WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
34 ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
35 OF SUCH DAMAGE.
36 */
37
38 #include "gd32e10x_fwdgt.h"
39
40 /*!
41 \brief enable write access to FWDGT_PSC and FWDGT_RLD
42 \param[in] none
43 \param[out] none
44 \retval none
45 */
fwdgt_write_enable(void)46 void fwdgt_write_enable(void)
47 {
48 FWDGT_CTL = FWDGT_WRITEACCESS_ENABLE;
49 }
50
51 /*!
52 \brief disable write access to FWDGT_PSC and FWDGT_RLD
53 \param[in] none
54 \param[out] none
55 \retval none
56 */
fwdgt_write_disable(void)57 void fwdgt_write_disable(void)
58 {
59 FWDGT_CTL = FWDGT_WRITEACCESS_DISABLE;
60 }
61
62 /*!
63 \brief start the free watchdog timer counter
64 \param[in] none
65 \param[out] none
66 \retval none
67 */
fwdgt_enable(void)68 void fwdgt_enable(void)
69 {
70 FWDGT_CTL = FWDGT_KEY_ENABLE;
71 }
72
73 /*!
74 \brief configure the free watchdog timer counter prescaler value
75 \param[in] prescaler_value: specify prescaler value
76 only one parameter can be selected which is shown as below:
77 \arg FWDGT_PSC_DIV4: FWDGT prescaler set to 4
78 \arg FWDGT_PSC_DIV8: FWDGT prescaler set to 8
79 \arg FWDGT_PSC_DIV16: FWDGT prescaler set to 16
80 \arg FWDGT_PSC_DIV32: FWDGT prescaler set to 32
81 \arg FWDGT_PSC_DIV64: FWDGT prescaler set to 64
82 \arg FWDGT_PSC_DIV128: FWDGT prescaler set to 128
83 \arg FWDGT_PSC_DIV256: FWDGT prescaler set to 256
84 \param[out] none
85 \retval ErrStatus: ERROR or SUCCESS
86 */
fwdgt_prescaler_value_config(uint16_t prescaler_value)87 ErrStatus fwdgt_prescaler_value_config(uint16_t prescaler_value)
88 {
89 uint32_t timeout = FWDGT_PSC_TIMEOUT;
90 uint32_t flag_status = RESET;
91
92 /* enable write access to FWDGT_PSC */
93 FWDGT_CTL = FWDGT_WRITEACCESS_ENABLE;
94
95 /* wait until the PUD flag to be reset */
96 do {
97 flag_status = FWDGT_STAT & FWDGT_STAT_PUD;
98 } while((--timeout > 0U) && ((uint32_t)RESET != flag_status));
99
100 if((uint32_t)RESET != flag_status) {
101 return ERROR;
102 }
103
104 /* configure FWDGT */
105 FWDGT_PSC = (uint32_t)prescaler_value;
106
107 return SUCCESS;
108 }
109
110 /*!
111 \brief configure the free watchdog timer counter reload value
112 \param[in] reload_value: specify reload value(0x0000 - 0x0FFF)
113 \param[out] none
114 \retval ErrStatus: ERROR or SUCCESS
115 */
fwdgt_reload_value_config(uint16_t reload_value)116 ErrStatus fwdgt_reload_value_config(uint16_t reload_value)
117 {
118 uint32_t timeout = FWDGT_RLD_TIMEOUT;
119 uint32_t flag_status = RESET;
120
121 /* enable write access to FWDGT_RLD */
122 FWDGT_CTL = FWDGT_WRITEACCESS_ENABLE;
123
124 /* wait until the RUD flag to be reset */
125 do {
126 flag_status = FWDGT_STAT & FWDGT_STAT_RUD;
127 } while((--timeout > 0U) && ((uint32_t)RESET != flag_status));
128
129 if((uint32_t)RESET != flag_status) {
130 return ERROR;
131 }
132
133 FWDGT_RLD = RLD_RLD(reload_value);
134
135 return SUCCESS;
136 }
137
138 /*!
139 \brief reload the counter of FWDGT
140 \param[in] none
141 \param[out] none
142 \retval none
143 */
fwdgt_counter_reload(void)144 void fwdgt_counter_reload(void)
145 {
146 FWDGT_CTL = FWDGT_KEY_RELOAD;
147 }
148
149 /*!
150 \brief configure counter reload value, and prescaler divider value
151 \param[in] reload_value: specify reload value(0x0000 - 0x0FFF)
152 \param[in] prescaler_div: FWDGT prescaler value
153 only one parameter can be selected which is shown as below:
154 \arg FWDGT_PSC_DIV4: FWDGT prescaler set to 4
155 \arg FWDGT_PSC_DIV8: FWDGT prescaler set to 8
156 \arg FWDGT_PSC_DIV16: FWDGT prescaler set to 16
157 \arg FWDGT_PSC_DIV32: FWDGT prescaler set to 32
158 \arg FWDGT_PSC_DIV64: FWDGT prescaler set to 64
159 \arg FWDGT_PSC_DIV128: FWDGT prescaler set to 128
160 \arg FWDGT_PSC_DIV256: FWDGT prescaler set to 256
161 \param[out] none
162 \retval ErrStatus: ERROR or SUCCESS
163 */
fwdgt_config(uint16_t reload_value,uint8_t prescaler_div)164 ErrStatus fwdgt_config(uint16_t reload_value, uint8_t prescaler_div)
165 {
166 uint32_t timeout = FWDGT_PSC_TIMEOUT;
167 uint32_t flag_status = RESET;
168
169 /* enable write access to FWDGT_PSC,and FWDGT_RLD */
170 FWDGT_CTL = FWDGT_WRITEACCESS_ENABLE;
171
172 /* wait until the PUD flag to be reset */
173 do {
174 flag_status = FWDGT_STAT & FWDGT_STAT_PUD;
175 } while((--timeout > 0U) && ((uint32_t)RESET != flag_status));
176
177 if((uint32_t)RESET != flag_status) {
178 return ERROR;
179 }
180
181 /* configure FWDGT */
182 FWDGT_PSC = (uint32_t)prescaler_div;
183
184 timeout = FWDGT_RLD_TIMEOUT;
185 /* wait until the RUD flag to be reset */
186 do {
187 flag_status = FWDGT_STAT & FWDGT_STAT_RUD;
188 } while((--timeout > 0U) && ((uint32_t)RESET != flag_status));
189
190 if((uint32_t)RESET != flag_status) {
191 return ERROR;
192 }
193
194 FWDGT_RLD = RLD_RLD(reload_value);
195
196 /* reload the counter */
197 FWDGT_CTL = FWDGT_KEY_RELOAD;
198
199 return SUCCESS;
200 }
201
202 /*!
203 \brief get flag state of FWDGT
204 \param[in] flag: flag to get
205 only one parameter can be selected which is shown as below:
206 \arg FWDGT_FLAG_PUD: a write operation to FWDGT_PSC register is on going
207 \arg FWDGT_FLAG_RUD: a write operation to FWDGT_RLD register is on going
208 \param[out] none
209 \retval FlagStatus: SET or RESET
210 */
fwdgt_flag_get(uint16_t flag)211 FlagStatus fwdgt_flag_get(uint16_t flag)
212 {
213 if(FWDGT_STAT & flag) {
214 return SET;
215 }
216
217 return RESET;
218 }
219
