1 /******************************************************************************
2 *
3 * Copyright (C) 2022-2023 Maxim Integrated Products, Inc. (now owned by
4 * Analog Devices, Inc.),
5 * Copyright (C) 2023-2024 Analog Devices, Inc.
6 *
7 * Licensed under the Apache License, Version 2.0 (the "License");
8 * you may not use this file except in compliance with the License.
9 * You may obtain a copy of the License at
10 *
11 * http://www.apache.org/licenses/LICENSE-2.0
12 *
13 * Unless required by applicable law or agreed to in writing, software
14 * distributed under the License is distributed on an "AS IS" BASIS,
15 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
16 * See the License for the specific language governing permissions and
17 * limitations under the License.
18 *
19 ******************************************************************************/
20
21 #include "mxc_device.h"
22 #include "rtc_regs.h"
23 #include "rtc.h"
24 #include "mxc_sys.h"
25 #include "mxc_delay.h"
26 #include "gpio_regs.h"
27 #include "mxc_errors.h"
28 #include "mcr_regs.h"
29 #include "rtc_reva.h"
30
31 /* ***** Functions ***** */
32
MXC_RTC_EnableInt(uint32_t mask)33 int MXC_RTC_EnableInt(uint32_t mask)
34 {
35 return MXC_RTC_RevA_EnableInt((mxc_rtc_reva_regs_t *)MXC_RTC, mask);
36 }
37
MXC_RTC_DisableInt(uint32_t mask)38 int MXC_RTC_DisableInt(uint32_t mask)
39 {
40 return MXC_RTC_RevA_DisableInt((mxc_rtc_reva_regs_t *)MXC_RTC, mask);
41 }
42
MXC_RTC_SetTimeofdayAlarm(uint32_t ras)43 int MXC_RTC_SetTimeofdayAlarm(uint32_t ras)
44 {
45 return MXC_RTC_RevA_SetTimeofdayAlarm((mxc_rtc_reva_regs_t *)MXC_RTC, ras);
46 }
47
MXC_RTC_SetSubsecondAlarm(uint32_t rssa)48 int MXC_RTC_SetSubsecondAlarm(uint32_t rssa)
49 {
50 return MXC_RTC_RevA_SetSubsecondAlarm((mxc_rtc_reva_regs_t *)MXC_RTC, rssa);
51 }
52
MXC_RTC_Start(void)53 int MXC_RTC_Start(void)
54 {
55 return MXC_RTC_RevA_Start((mxc_rtc_reva_regs_t *)MXC_RTC);
56 }
57
MXC_RTC_Stop(void)58 int MXC_RTC_Stop(void)
59 {
60 return MXC_RTC_RevA_Stop((mxc_rtc_reva_regs_t *)MXC_RTC);
61 }
62
MXC_RTC_Init(uint32_t sec,uint16_t ssec)63 int MXC_RTC_Init(uint32_t sec, uint16_t ssec)
64 {
65 // Enable clock
66 MXC_GCR->clkctrl |= MXC_F_GCR_CLKCTRL_ERTCO_EN;
67
68 return MXC_RTC_RevA_Init((mxc_rtc_reva_regs_t *)MXC_RTC, sec, (ssec & MXC_F_RTC_SSEC_SSEC));
69 }
70
MXC_RTC_SquareWave(mxc_rtc_reva_sqwave_en_t sqe,mxc_rtc_freq_sel_t ft)71 int MXC_RTC_SquareWave(mxc_rtc_reva_sqwave_en_t sqe, mxc_rtc_freq_sel_t ft)
72 {
73 MXC_GPIO_Config(&gpio_cfg_rtcsqw);
74
75 return MXC_RTC_RevA_SquareWave((mxc_rtc_reva_regs_t *)MXC_RTC, sqe, ft);
76 }
77
MXC_RTC_SquareWaveStart(mxc_rtc_freq_sel_t fq)78 int MXC_RTC_SquareWaveStart(mxc_rtc_freq_sel_t fq)
79 {
80 MXC_GPIO_Config(&gpio_cfg_rtcsqw);
81
82 return MXC_RTC_RevA_SquareWave((mxc_rtc_reva_regs_t *)MXC_RTC, MXC_RTC_REVA_SQUARE_WAVE_ENABLED,
83 fq);
84 }
85
MXC_RTC_SquareWaveStop(void)86 int MXC_RTC_SquareWaveStop(void)
87 {
88 return MXC_RTC_RevA_SquareWave((mxc_rtc_reva_regs_t *)MXC_RTC,
89 MXC_RTC_REVA_SQUARE_WAVE_DISABLED, 0);
90 }
91
MXC_RTC_Trim(int8_t trm)92 int MXC_RTC_Trim(int8_t trm)
93 {
94 return MXC_RTC_RevA_Trim((mxc_rtc_reva_regs_t *)MXC_RTC, trm);
95 }
96
MXC_RTC_GetFlags(void)97 int MXC_RTC_GetFlags(void)
98 {
99 return MXC_RTC_RevA_GetFlags((mxc_rtc_reva_regs_t *)MXC_RTC);
100 }
101
MXC_RTC_ClearFlags(int flags)102 int MXC_RTC_ClearFlags(int flags)
103 {
104 return MXC_RTC_RevA_ClearFlags((mxc_rtc_reva_regs_t *)MXC_RTC, flags);
105 }
106
MXC_RTC_GetSubSecond(void)107 int MXC_RTC_GetSubSecond(void)
108 {
109 return MXC_RTC_RevA_GetSubSecond((mxc_rtc_reva_regs_t *)MXC_RTC);
110 }
111
MXC_RTC_GetSecond(void)112 int MXC_RTC_GetSecond(void)
113 {
114 return MXC_RTC_RevA_GetSecond((mxc_rtc_reva_regs_t *)MXC_RTC);
115 }
116
MXC_RTC_GetSubSeconds(uint32_t * ssec)117 int MXC_RTC_GetSubSeconds(uint32_t *ssec)
118 {
119 MXC_RTC->ctrl &= ~MXC_F_RTC_CTRL_RDY; // Ensure valid data is in SSEC register
120 while (!(MXC_RTC->ctrl & MXC_F_RTC_CTRL_RDY)) {}
121
122 return MXC_RTC_RevA_GetSubSeconds((mxc_rtc_reva_regs_t *)MXC_RTC, ssec);
123 }
124
MXC_RTC_GetSeconds(uint32_t * sec)125 int MXC_RTC_GetSeconds(uint32_t *sec)
126 {
127 MXC_RTC->ctrl &= ~MXC_F_RTC_CTRL_RDY; // Ensure valid data is in SEC register
128 while (!(MXC_RTC->ctrl & MXC_F_RTC_CTRL_RDY)) {}
129
130 return MXC_RTC_RevA_GetSeconds((mxc_rtc_reva_regs_t *)MXC_RTC, sec);
131 }
132
MXC_RTC_GetTime(uint32_t * sec,uint32_t * subsec)133 int MXC_RTC_GetTime(uint32_t *sec, uint32_t *subsec)
134 {
135 return MXC_RTC_RevA_GetTime((mxc_rtc_reva_regs_t *)MXC_RTC, sec, subsec);
136 }
137
MXC_RTC_GetBusyFlag(void)138 int MXC_RTC_GetBusyFlag(void)
139 {
140 return MXC_RTC_RevA_GetBusyFlag((mxc_rtc_reva_regs_t *)MXC_RTC);
141 }
142
MXC_RTC_TrimCrystal(mxc_tmr_regs_t * tmr)143 int MXC_RTC_TrimCrystal(mxc_tmr_regs_t *tmr)
144 {
145 int err;
146 uint32_t sys_clk;
147
148 sys_clk = (MXC_GCR->clkctrl & MXC_F_GCR_CLKCTRL_SYSCLK_SEL) >>
149 MXC_F_GCR_CLKCTRL_SYSCLK_SEL_POS; // Save current system clock
150 if (sys_clk != MXC_SYS_CLOCK_ERFO) { // Change system clock to reference oscillator source
151 if ((err = MXC_SYS_Clock_Select(MXC_SYS_CLOCK_ERFO)) != E_NO_ERROR) {
152 return err;
153 }
154 }
155
156 mxc_tmr_cfg_t
157 tmr_cfg; // Configure timer to trigger each interrupt NUM_PERIOD number of times within a second
158 tmr_cfg.pres = TMR_PRES_1;
159 tmr_cfg.mode = TMR_MODE_CONTINUOUS;
160 tmr_cfg.cmp_cnt = PeripheralClock / MXC_RTC_REVA_TRIM_PERIODS;
161 tmr_cfg.pol = 0;
162 MXC_TMR_Init(tmr, &tmr_cfg);
163
164 err = MXC_RTC_RevA_TrimCrystal((mxc_rtc_reva_regs_t *)MXC_RTC, tmr);
165
166 if (sys_clk != MXC_SYS_CLOCK_ERFO) { // Restore previous system clock if we changed it
167 MXC_SYS_Clock_Select(sys_clk);
168 }
169
170 return err;
171 }
172
