aboutsummaryrefslogtreecommitdiff
path: root/lib/rcc.c
blob: 47bcafb177bcc8b0a3319e65ff81cbbb78b409b4 (plain)
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
/*
 * This file is part of the libopenstm32 project.
 *
 * Copyright (C) 2009 Federico Ruiz-Ugalde <memeruiz at gmail dot com>
 * Copyright (C) 2009 Uwe Hermann <uwe@hermann-uwe.de>
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

#include <libopenstm32.h>

void rcc_osc_ready_int_clear(osc_t osc)
{
	switch (osc) {
	case PLL:
		RCC_CR |= PLLRDYC;
		break;
	case HSE:
		RCC_CR |= HSERDYC;
		break;
	case HSI:
		RCC_CR |= HSIRDYC;
		break;
	case LSE:
		RCC_CIR |= LSERDYC;
		break;
	case LSI:
		RCC_CIR |= LSIRDYC;
		break;
	}
}

void rcc_osc_ready_int_enable(osc_t osc)
{
	switch (osc) {
	case PLL:
		RCC_CR |= PLLRDYIE;
		break;
	case HSE:
		RCC_CR |= HSERDYIE;
		break;
	case HSI:
		RCC_CR |= HSIRDYIE;
		break;
	case LSE:
		RCC_CIR |= LSERDYIE;
		break;
	case LSI:
		RCC_CIR |= LSIRDYIE;
		break;
	}
}

void rcc_osc_ready_int_disable(osc_t osc)
{
	switch (osc) {
	case PLL:
		RCC_CR &= ~PLLRDYIE;
		break;
	case HSE:
		RCC_CR &= ~HSERDYIE;
		break;
	case HSI:
		RCC_CR &= ~HSIRDYIE;
		break;
	case LSE:
		RCC_CIR &= ~LSERDYIE;
		break;
	case LSI:
		RCC_CIR &= ~LSIRDYIE;
		break;
	}
}

int rcc_osc_ready_int_flag(osc_t osc)
{
	switch (osc) {
	case PLL:
		return ((RCC_CR & PLLRDYF) != 0);
		break;
	case HSE:
		return ((RCC_CR & HSERDYF) != 0);
		break;
	case HSI:
		return ((RCC_CR & HSIRDYF) != 0);
		break;
	case LSE:
		return ((RCC_CIR & LSERDYF) != 0);
		break;
	case LSI:
		return ((RCC_CIR & LSIRDYF) != 0);
		break;
	}

	/* Shouldn't be reached. */
	return -1;
}

void rcc_css_int_clear(void)
{
	RCC_CIR |= CSSC;
}

int rcc_css_int_flag(void)
{
	return ((RCC_CIR & CSSF) != 0);
}

void rcc_wait_for_osc_ready(osc_t osc)
{
	switch (osc) {
	case PLL:
		while ((RCC_CR & PLLRDY) != 0);
		break;
	case HSE:
		while ((RCC_CR & HSERDY) != 0);
		break;
	case HSI:
		while ((RCC_CR & HSIRDY) != 0);
		break;
	case LSE:
		while ((RCC_BDCR & LSERDY) != 0);
		break;
	case LSI:
		while ((RCC_CSR & LSIRDY) != 0);
		break;
	}
}

void rcc_osc_on(osc_t osc)
{
	switch (osc) {
	case PLL:
		RCC_CR |= PLLON;
		break;
	case HSE:
		RCC_CR |= HSEON;
		break;
	case HSI:
		RCC_CR |= HSION;
		break;
	case LSE:
		RCC_BDCR |= LSEON;
		break;
	case LSI:
		RCC_CSR |= LSION;
		break;
	}
}

void rcc_osc_off(osc_t osc)
{
	switch (osc) {
	case PLL:
		RCC_CR &= ~PLLON;
		break;
	case HSE:
		RCC_CR &= ~HSEON;
		break;
	case HSI:
		RCC_CR &= ~HSION;
		break;
	case LSE:
		RCC_BDCR &= ~LSEON;
		break;
	case LSI:
		RCC_CSR &= ~LSION;
		break;
	}
}

void rcc_css_enable(void)
{
	RCC_CR |= CSSON;
}

void rcc_css_disable(void)
{
	RCC_CR &= ~CSSON;
}

void rcc_osc_bypass_enable(osc_t osc)
{
	switch (osc) {
	case HSE:
		RCC_CR |= HSEBYP;
		break;
	case LSE:
		RCC_BDCR |= LSEBYP;
		break;
	case PLL:
	case HSI:
	case LSI:
		/* Do nothing, only HSE/LSE allowed here. */
		break;
	}
}

void rcc_osc_bypass_disable(osc_t osc)
{
	switch (osc) {
	case HSE:
		RCC_CR &= ~HSEBYP;
		break;
	case LSE:
		RCC_BDCR &= ~LSEBYP;
		break;
	case PLL:
	case HSI:
	case LSI:
		/* Do nothing, only HSE/LSE allowed here. */
		break;
	}
}