1 /*!
2 \file gd32e50x_fwdgt.c
3 \brief FWDGT driver
4
5 \version 2020-03-10, V1.0.0, firmware for GD32E50x
6 \version 2020-08-26, V1.1.0, firmware for GD32E50x
7 \version 2021-03-23, V1.2.0, firmware for GD32E50x
8 */
9
10 /*
11 Copyright (c) 2021, 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 "gd32e50x_fwdgt.h"
38
39 /* write value to FWDGT_CTL_CMD bit field */
40 #define CTL_CMD(regval) (BITS(0,15) & ((uint32_t)(regval) << 0))
41 /* write value to FWDGT_RLD_RLD bit field */
42 #define RLD_RLD(regval) (BITS(0,11) & ((uint32_t)(regval) << 0))
43
44 /*!
45 \brief enable write access to FWDGT_PSC and FWDGT_RLD
46 \param[in] none
47 \param[out] none
48 \retval none
49 */
fwdgt_write_enable(void)50 void fwdgt_write_enable(void)
51 {
52 FWDGT_CTL = FWDGT_WRITEACCESS_ENABLE;
53 }
54
55 /*!
56 \brief disable write access to FWDGT_PSC and FWDGT_RLD
57 \param[in] none
58 \param[out] none
59 \retval none
60 */
fwdgt_write_disable(void)61 void fwdgt_write_disable(void)
62 {
63 FWDGT_CTL = FWDGT_WRITEACCESS_DISABLE;
64 }
65
66 /*!
67 \brief start the free watchdog timer counter
68 \param[in] none
69 \param[out] none
70 \retval none
71 */
fwdgt_enable(void)72 void fwdgt_enable(void)
73 {
74 FWDGT_CTL = FWDGT_KEY_ENABLE;
75 }
76
77 /*!
78 \brief configure the FWDGT counter prescaler value
79 \param[in] prescaler_value: specify prescaler value
80 only one parameter can be selected which is shown as below:
81 \arg FWDGT_PSC_DIV4: FWDGT prescaler set to 4
82 \arg FWDGT_PSC_DIV8: FWDGT prescaler set to 8
83 \arg FWDGT_PSC_DIV16: FWDGT prescaler set to 16
84 \arg FWDGT_PSC_DIV32: FWDGT prescaler set to 32
85 \arg FWDGT_PSC_DIV64: FWDGT prescaler set to 64
86 \arg FWDGT_PSC_DIV128: FWDGT prescaler set to 128
87 \arg FWDGT_PSC_DIV256: FWDGT prescaler set to 256
88 \param[out] none
89 \retval ErrStatus: ERROR or SUCCESS
90 */
fwdgt_prescaler_value_config(uint16_t prescaler_value)91 ErrStatus fwdgt_prescaler_value_config(uint16_t prescaler_value)
92 {
93 uint32_t timeout = FWDGT_PSC_TIMEOUT;
94 uint32_t flag_status = RESET;
95
96 /* enable write access to FWDGT_PSC */
97 FWDGT_CTL = FWDGT_WRITEACCESS_ENABLE;
98
99 /* wait until the PUD flag to be reset */
100 do{
101 flag_status = FWDGT_STAT & FWDGT_STAT_PUD;
102 } while((--timeout > 0U) && (RESET != flag_status));
103
104 if(RESET != flag_status){
105 return ERROR;
106 }
107
108 /* configure FWDGT */
109 FWDGT_PSC = (uint32_t)prescaler_value;
110
111 return SUCCESS;
112 }
113
114 /*!
115 \brief configure the FWDGT counter reload value
116 \param[in] reload_value: specify reload value(0x0000 - 0x0FFF)
117 \param[out] none
118 \retval ErrStatus: ERROR or SUCCESS
119 */
fwdgt_reload_value_config(uint16_t reload_value)120 ErrStatus fwdgt_reload_value_config(uint16_t reload_value)
121 {
122 uint32_t timeout = FWDGT_RLD_TIMEOUT;
123 uint32_t flag_status = RESET;
124
125 /* enable write access to FWDGT_RLD */
126 FWDGT_CTL = FWDGT_WRITEACCESS_ENABLE;
127
128 /* wait until the RUD flag to be reset */
129 do{
130 flag_status = FWDGT_STAT & FWDGT_STAT_RUD;
131 }while((--timeout > 0U) && ((uint32_t)RESET != flag_status));
132
133 if ((uint32_t)RESET != flag_status){
134 return ERROR;
135 }
136
137 FWDGT_RLD = RLD_RLD(reload_value);
138
139 return SUCCESS;
140 }
141
142 /*!
143 \brief configure counter reload value, and prescaler divider value
144 \param[in] reload_value: specify reload value(0x0000 - 0x0FFF)
145 \param[in] prescaler_div: FWDGT prescaler value
146 only one parameter can be selected which is shown as below:
147 \arg FWDGT_PSC_DIV4: FWDGT prescaler set to 4
148 \arg FWDGT_PSC_DIV8: FWDGT prescaler set to 8
149 \arg FWDGT_PSC_DIV16: FWDGT prescaler set to 16
150 \arg FWDGT_PSC_DIV32: FWDGT prescaler set to 32
151 \arg FWDGT_PSC_DIV64: FWDGT prescaler set to 64
152 \arg FWDGT_PSC_DIV128: FWDGT prescaler set to 128
153 \arg FWDGT_PSC_DIV256: FWDGT prescaler set to 256
154 \param[out] none
155 \retval ErrStatus: ERROR or SUCCESS
156 */
fwdgt_config(uint16_t reload_value,uint8_t prescaler_div)157 ErrStatus fwdgt_config(uint16_t reload_value, uint8_t prescaler_div)
158 {
159 uint32_t timeout = FWDGT_PSC_TIMEOUT;
160 uint32_t flag_status = RESET;
161
162 /* enable write access to FWDGT_PSC,and FWDGT_RLD */
163 FWDGT_CTL = FWDGT_WRITEACCESS_ENABLE;
164
165 /* wait until the PUD flag to be reset */
166 do{
167 flag_status = FWDGT_STAT & FWDGT_STAT_PUD;
168 }while((--timeout > 0U) && ((uint32_t)RESET != flag_status));
169
170 if ((uint32_t)RESET != flag_status){
171 return ERROR;
172 }
173
174 /* configure FWDGT */
175 FWDGT_PSC = (uint32_t)prescaler_div;
176
177 timeout = FWDGT_RLD_TIMEOUT;
178 /* wait until the RUD flag to be reset */
179 do{
180 flag_status = FWDGT_STAT & FWDGT_STAT_RUD;
181 }while((--timeout > 0U) && ((uint32_t)RESET != flag_status));
182
183 if ((uint32_t)RESET != flag_status){
184 return ERROR;
185 }
186
187 FWDGT_RLD = RLD_RLD(reload_value);
188
189 /* reload the counter */
190 FWDGT_CTL = FWDGT_KEY_RELOAD;
191
192 return SUCCESS;
193 }
194
195 /*!
196 \brief reload the counter of FWDGT
197 \param[in] none
198 \param[out] none
199 \retval none
200 */
fwdgt_counter_reload(void)201 void fwdgt_counter_reload(void)
202 {
203 FWDGT_CTL = FWDGT_KEY_RELOAD;
204 }
205
206 /*!
207 \brief get flag state of FWDGT
208 \param[in] flag: flag to get
209 only one parameter can be selected which is shown as below:
210 \arg FWDGT_FLAG_PUD: a write operation to FWDGT_PSC register is on going
211 \arg FWDGT_FLAG_RUD: a write operation to FWDGT_RLD register is on going
212 \param[out] none
213 \retval FlagStatus: SET or RESET
214 */
fwdgt_flag_get(uint16_t flag)215 FlagStatus fwdgt_flag_get(uint16_t flag)
216 {
217 if(RESET != (FWDGT_STAT & flag)){
218 return SET;
219 }
220
221 return RESET;
222 }
223
