1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
#include "rtc.h"
#include "cgc.h"
/**
* @brief Start the RTC counter operation.
* @param None
* @retval None
*/
void RTC_Start(void)
{
INTC_ClearPendingIRQ(RTC_IRQn); // clear INTRTC interrupt flag
NVIC_ClearPendingIRQ(RTC_IRQn); // clear INTRTC interrupt flag
INTC_EnableIRQ(RTC_IRQn); // enable INTRTC interrupt
RTC->RTCC0 |= 0x80; // starts counter operation
/* confirm the RTC is running */
RTC->RTCC1 |= RTC_RTCC1_RWAIT_Msk; //stops SEC to YEAR counters. Mode to read or write counter value
while((RTC->RTCC1 & RTC_RTCC1_RWST_Msk) == 0); // wait RWST = 1
RTC->RTCC1 &= ~RTC_RTCC1_RWAIT_Msk; // sets counter operation
while((RTC->RTCC1 & RTC_RTCC1_RWST_Msk) != 0); // wait RWST = 0
}
/**
* @brief Stop the RTC counter operation.
* @param None
* @retval None
*/
void RTC_Stop(void)
{
RTC->RTCC0 = 0x00; /* stops counter operation */
INTC_DisableIRQ(RTC_IRQn); /* disable INTRTC interrupt */
INTC_ClearPendingIRQ(RTC_IRQn); /* clear INTRTC interrupt flag */
NVIC_ClearPendingIRQ(RTC_IRQn); /* clear INTRTC interrupt flag */
}
/**
* @brief Convert from 2 digit BCD to Binary.
* @param Value: BCD value to be converted.
* @retval Converted word
*/
static uint8_t RTC_Bcd2ToByte(uint8_t Value)
{
uint8_t tmp = 0;
tmp = ((uint8_t)(Value & (uint8_t)0xF0) >> (uint8_t)0x4) * 10;
return (tmp + (Value & (uint8_t)0x0F));
}
/**
* @brief Converts a 2 digit decimal to BCD format.
* @param Value: Byte to be converted.
* @retval Converted byte
*/
static uint8_t RTC_ByteToBcd2(uint8_t Value)
{
uint8_t bcdhigh = 0;
while (Value >= 10)
{
bcdhigh++;
Value -= 10;
}
return ((uint8_t)(bcdhigh << 4) | Value);
}
/**
* @brief Set the RTC hour format.
* @param RTC_HourFormat:
@arg RTC_HourFormat_12
@arg RTC_HourFormat_24
* @retval None
*/
void RTC_SetHourFormat(uint8_t RTC_HourFormat)
{
/* Check the parameters */
assert_param(IS_RTC_HOURFORMAT(RTC_HourFormat));
RTC->RTCC1 |= RTC_RTCC1_RWAIT_Msk; // stops SEC to YEAR counters. Mode to read or write counter value
RTC->RTCC0 |= RTC_HourFormat; // select counter hour format:24hour or 12hour
RTC->RTCC1 &= ~RTC_RTCC1_RWAIT_Msk; // sets counter operation
while((RTC->RTCC1 & RTC_RTCC1_RWST_Msk) != 0); // wait RWST = 0
}
/**
* @brief Set the RTC current time.
* @param RTC_TimeStruct: pointer to a RTC_TimeTypeDef structure that contains
* the time configuration information for the RTC.
* @retval None
*/
void RTC_SetTime(RTC_TimeTypeDef* RTC_TimeStruct)
{
/* Check the parameters */
assert_param(IS_RTC_HOUR24(RTC_TimeStruct->RTC_Hours));
assert_param(IS_RTC_MINUTES(RTC_TimeStruct->RTC_Minutes));
assert_param(IS_RTC_SECONDS(RTC_TimeStruct->RTC_Seconds));
RTC->RTCC1 |= RTC_RTCC1_RWAIT_Msk; // stops SEC to YEAR counters. Mode to read or write counter value
RTC->HOUR |= RTC_ByteToBcd2(RTC_TimeStruct->RTC_Hours);
RTC->MIN = RTC_ByteToBcd2(RTC_TimeStruct->RTC_Minutes);
RTC->SEC = RTC_ByteToBcd2(RTC_TimeStruct->RTC_Seconds);
if(RTC_TimeStruct->RTC_Hours >12)
{
RTC->RTCC0 |= RTC_HourFormat_24;
}
else
{
RTC->RTCC0 |= RTC_HourFormat_12;
RTC->HOUR |= RTC_TimeStruct->RTC_H12;
}
RTC->RTCC1 &= ~RTC_RTCC1_RWAIT_Msk; // sets counter operation
while((RTC->RTCC1 & RTC_RTCC1_RWST_Msk) != 0); // wait RWST = 0
}
/**
* @brief Set the RTC current date.
* @param RTC_DateStruct: pointer to a RTC_DateTypeDef structure that contains
* the date configuration information for the RTC.
* @retval None
*/
void RTC_SetDate(RTC_DateTypeDef* RTC_DateStruct)
{
assert_param(IS_RTC_YEAR(RTC_DateStruct->RTC_Year));
assert_param(IS_RTC_MONTH(RTC_DateStruct->RTC_Month));
assert_param(IS_RTC_DATE(RTC_DateStruct->RTC_Day));
assert_param(IS_RTC_DATE(RTC_DateStruct->RTC_WeekDay));
RTC->RTCC1 |= RTC_RTCC1_RWAIT_Msk; // stops SEC to YEAR counters. Mode to read or write counter value
RTC->DAY = RTC_ByteToBcd2(RTC_DateStruct->RTC_Day);
RTC->WEEK = RTC_ByteToBcd2(RTC_DateStruct->RTC_WeekDay);
RTC->MONTH = RTC_ByteToBcd2(RTC_DateStruct->RTC_Month);
RTC->YEAR = RTC_ByteToBcd2(RTC_DateStruct->RTC_Year);
RTC->RTCC1 &= ~RTC_RTCC1_RWAIT_Msk; // sets counter operation
while((RTC->RTCC1 & RTC_RTCC1_RWST_Msk) != 0); // wait RWST = 0
}
/**
* @brief Get the RTC current date and time.
* @param RTC_DateStruct: pointer to a RTC_DateTypeDef structure that contains
* the date configuration information for the RTC.
* @retval None
*/
void RTC_Get_CounterValue(RTC_CounterTypeDef *counter_val)
{
RTC->RTCC1 |= RTC_RTCC1_RWAIT_Msk; // stops SEC to YEAR counters. Mode to read or write counter value
while((RTC->RTCC1 & RTC_RTCC1_RWST_Msk) == 0); // wait RWST = 1
counter_val->time.RTC_Seconds = RTC->SEC;
counter_val->time.RTC_Minutes = RTC->MIN;
counter_val->time.RTC_Hours = RTC->HOUR;
counter_val->date.RTC_Day = RTC->DAY;
counter_val->date.RTC_WeekDay = RTC->WEEK;
counter_val->date.RTC_Month = RTC->MONTH;
counter_val->date.RTC_Year = RTC->YEAR;
RTC->RTCC1 &= ~RTC_RTCC1_RWAIT_Msk; // sets counter operation
while((RTC->RTCC1 & RTC_RTCC1_RWST_Msk) != 0); // wait RWST = 0
}
/**
* @brief Set the specified RTC Alarm.
* @note
* @param RTC_AlarmStruct: pointer to a RTC_AlarmTypeDef structure that
* contains the alarm configuration parameters.
* @retval None
*/
void RTC_SetAlarm( RTC_Alarm_t * RTC_AlarmStruct)
{
INTC_DisableIRQ(RTC_IRQn); // disable INTRTC interrupt
RTC->RTCC1 &= ~0x80;
RTC->RTCC1 |= 0x40;
RTC->ALARMWM = RTC_ByteToBcd2(RTC_AlarmStruct->Alarm_Minute);
RTC->ALARMWH = RTC_ByteToBcd2(RTC_AlarmStruct->Alarm_Hour);
RTC->ALARMWW = RTC_AlarmStruct->Alarm_Week;
RTC->RTCC1 |= 0x80;
RTC->RTCC1 &= ~0x10;//set alarm match-bit clear
INTC_ClearPendingIRQ(RTC_IRQn); // clear INTRTC interrupt flag
NVIC_ClearPendingIRQ(RTC_IRQn); // clear INTRTC interrupt flag
INTC_EnableIRQ(RTC_IRQn); // enable INTRTC interrupt
}
/**
* @brief Get the specified RTC Alarm Value.
* @note
* @param alarm_val: pointer to a RTC_Alarm_t structure that
* contains the alarm configuration parameters.
* @retval None
*/
void RTC_Get_AlarmValue(RTC_Alarm_t * alarm_val)
{
INTC_DisableIRQ(RTC_IRQn); // disable INTRTC interrupt
RTC->RTCC1 &= ~0x80;
alarm_val->Alarm_Minute = RTC->ALARMWM;
alarm_val->Alarm_Hour = RTC->ALARMWH;
alarm_val->Alarm_Week = RTC->ALARMWW;
RTC->RTCC1 |= 0x80;
RTC->RTCC1 &= ~0x10;//set alarm match-bit clear
INTC_ClearPendingIRQ(RTC_IRQn); // clear INTRTC interrupt flag
NVIC_ClearPendingIRQ(RTC_IRQn); // clear INTRTC interrupt flag
INTC_EnableIRQ(RTC_IRQn); // enable INTRTC interrupt
}
/**
* @brief Initializes the RTC registers according to the specified parameters
* in RTC_InitStruct.
* @param RTC_InitStruct: pointer to a RTC_InitTypeDef structure that contains
* the configuration information for the RTC peripheral.
* @note The RTC Prescaler register is write protected and can be written in
* initialization mode only.
* @retval None
*/
void RTC_Init(RTC_InitTypeDef *RTC_InitStruct)
{
/* Check the parameters */
assert_param(IS_RTC_HOURFORMAT(RTC_InitStruct->RTC_HourFormat));
assert_param(IS_RTC_MINUTES(RTC_InitStruct->RTC_Time.RTC_Minutes));
assert_param(IS_RTC_SECONDS(RTC_InitStruct->RTC_Time.RTC_Seconds));
assert_param(IS_RTC_DATE(RTC_InitStruct->RTC_Date.RTC_Day));
assert_param(IS_RTC_MONTH(RTC_InitStruct->RTC_Date.RTC_Month));
assert_param(IS_RTC_YEAR(RTC_InitStruct->RTC_Date.RTC_Year));
assert_param(IS_RTC_WEEKDAY(RTC_InitStruct->RTC_Date.RTC_WeekDay));
CGC_PER0PeriphClockCmd(CGC_PER0Periph_RTC,ENABLE);
if(RTC_InitStruct->RTC_Clk == RTC_FIL)
{
CGC->OSMC |= 1<<4;
}
MISC->RTCCL = RTC_InitStruct->RTC_Clk;
RTC->RTCC0 = 0x00; // stops counter operation
RTC->RTCC0 |= RTC_InitStruct->RTC_HourFormat; // select counter hour format:24hour or 12hour
if(RTC_InitStruct->RTC_1HZ_Output)
{
RTC->RTCC0 |= 0x20;
}
RTC->RTCC0 = (RTC->RTCC0 & (~0x07)) | RTC_InitStruct->RTC_Period;//set constant rtc period interrupt
RTC->RTCC1 &= (uint8_t)~0x08; //when generate period interrupt,bit-4 becomes 1; writing 0 to erase this flag
RTC->SEC = RTC_ByteToBcd2(RTC_InitStruct->RTC_Time.RTC_Seconds);
RTC->MIN = RTC_ByteToBcd2(RTC_InitStruct->RTC_Time.RTC_Minutes);
RTC->HOUR = RTC_ByteToBcd2(RTC_InitStruct->RTC_Time.RTC_Hours);
if(RTC_InitStruct->RTC_HourFormat == RTC_HourFormat_12)
RTC->HOUR |= RTC_InitStruct->RTC_Time.RTC_H12;
RTC->DAY = RTC_ByteToBcd2(RTC_InitStruct->RTC_Date.RTC_Day);
RTC->WEEK = RTC_ByteToBcd2(RTC_InitStruct->RTC_Date.RTC_WeekDay);
RTC->MONTH = RTC_ByteToBcd2(RTC_InitStruct->RTC_Date.RTC_Month);
RTC->YEAR = RTC_ByteToBcd2(RTC_InitStruct->RTC_Date.RTC_Year);
RTC->RTCC1 &= (uint8_t)~0x80;//When set alarm registor, it must set RTCC1 wale-bit(bit-8) 0
if(RTC_InitStruct->RTC_Alarm_Onoff)
{
RTC->RTCC1 |= 0x40;
}
else
{
RTC->RTCC1 |= 0x00;
}
RTC->ALARMWM = RTC_ByteToBcd2(RTC_InitStruct->RTC_Alarm.Alarm_Minute);
RTC->ALARMWH = RTC_ByteToBcd2(RTC_InitStruct->RTC_Alarm.Alarm_Hour);
RTC->ALARMWW = RTC_InitStruct->RTC_Alarm.Alarm_Week;
RTC->RTCC1 &= ~0x10;//set alarm match-bit clear
}
/**
* @brief Enable the specified RTC Alarm function .
* @param
* @retval None
*/
void RTC_Set_AlarmOn(void)
{
volatile uint16_t w_count;
INTC_DisableIRQ(RTC_IRQn); // disable INTRTC interrupt
RTC->RTCC1 |= 0x80; //RTC_ALARM_ENABLE
for (w_count = 0U; w_count < 2; w_count++)
{
__NOP();
}
RTC->RTCC1 &= ~0x10;//set alarm match-bit clear
INTC_ClearPendingIRQ(RTC_IRQn); // clear INTRTC interrupt flag
NVIC_ClearPendingIRQ(RTC_IRQn); // clear INTRTC interrupt flag
INTC_EnableIRQ(RTC_IRQn); // enable INTRTC interrupt
}
/**
* @brief Disable the specified RTC Alarm function .
* @param
* @retval None
*/
void RTC_Set_AlarmOff(void)
{
INTC_DisableIRQ(RTC_IRQn); // disable INTRTC interrupt
RTC->RTCC1 &= ~0x80;
RTC->RTCC1 &= ~0x10;
INTC_ClearPendingIRQ(RTC_IRQn); // clear INTRTC interrupt flag
NVIC_ClearPendingIRQ(RTC_IRQn); // clear INTRTC interrupt flag
}
/**
* @brief Enable the specified RTC constant period interrupt function .
* @param period ：set the constant period interrupt
* @arg Half_Second
* @arg One_Second
* @arg One_Minute
* @arg One_Hour
* @arg One_Month
* @retval None
*/
void RTC_Set_ConstPeriodInterruptOn(RTC_Period_t period)
{
INTC_DisableIRQ(RTC_IRQn); // disable INTRTC interrupt */
RTC->RTCC0 = (RTC->RTCC0 & (~0x07)) | period;
RTC->RTCC1 &=~0x08;
INTC_ClearPendingIRQ(RTC_IRQn); // clear INTRTC interrupt flag
NVIC_ClearPendingIRQ(RTC_IRQn); // clear INTRTC interrupt flag
INTC_EnableIRQ(RTC_IRQn); // enable INTRTC interrupt
}
/**
* @brief Disable the specified RTC constant period interrupt function .
* @param
* @retval None
*/
void RTC_Set_ConstPeriodInterruptOff(void)
{
RTC->RTCC0 &= (uint8_t)~(0x07);
RTC->RTCC1 &=~0x08;
INTC_ClearPendingIRQ(RTC_IRQn); // clear INTRTC interrupt flag
NVIC_ClearPendingIRQ(RTC_IRQn); // clear INTRTC interrupt flag
}