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
|
/******************************************************************************
* The MIT License
*
* Copyright (c) 2010 Perry Hung.
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*****************************************************************************/
/**
* @file rcc.h
* @brief reset and clock control definitions and prototypes
*/
#ifndef _RCC_H_
#define _RCC_H_
/* registers */
#define RCC_BASE 0x40021000
#define RCC_CR (RCC_BASE + 0x0)
#define RCC_CFGR (RCC_BASE + 0x4)
#define RCC_CIR (RCC_BASE + 0x8)
#define RCC_APB2RSTR (RCC_BASE + 0xC)
#define RCC_APB1RSTR (RCC_BASE + 0x10)
#define RCC_AHBENR (RCC_BASE + 0x14)
#define RCC_APB2ENR (RCC_BASE + 0x18)
#define RCC_APB1ENR (RCC_BASE + 0x1C)
#define RCC_BDCR (RCC_BASE + 0x20)
#define RCC_CSR (RCC_BASE + 0x24)
#define RCC_AHBSTR (RCC_BASE + 0x28)
#define RCC_CFGR2 (RCC_BASE + 0x2C)
#define RCC_CFGR_USBPRE (0x1 << 22)
#define RCC_CFGR_ADCPRE (0x3 << 14)
#define RCC_CFGR_PPRE1 (0x7 << 8)
#define RCC_CFGR_PPRE2 (0x7 << 11)
#define RCC_CFGR_HPRE (0xF << 4)
#define RCC_CFGR_PLLSRC (0x1 << 16)
#define RCC_CFGR_SWS (0x3 << 2)
#define RCC_CFGR_SWS_PLL (0x2 << 2)
#define RCC_CFGR_SWS_HSE (0x1 << 2)
#define RCC_CFGR_SW (0x3 << 0)
#define RCC_CFGR_SW_PLL (0x2 << 0)
#define RCC_CFGR_SW_HSE (0x1 << 0)
/* CR status bits */
#define RCC_CR_HSEON (0x1 << 16)
#define RCC_CR_HSERDY (0x1 << 17)
#define RCC_CR_PLLON (0x1 << 24)
#define RCC_CR_PLLRDY (0x1 << 25)
#define RCC_WRITE_CFGR(val) __write(RCC_CFGR, val)
#define RCC_READ_CFGR() __read(RCC_CFGR)
#define RCC_WRITE_CR(val) __write(RCC_CR, val)
#define RCC_READ_CR() __read(RCC_CR)
/* sysclk source */
#define RCC_CLKSRC_HSI (0x0)
#define RCC_CLKSRC_HSE (0x1)
#define RCC_CLKSRC_PLL (0x2)
/* pll entry clock source */
#define RCC_PLLSRC_HSE (0x1 << 16)
#define RCC_PLLSRC_HSI_DIV_2 (0x0 << 16)
/* adc prescaler dividers */
#define RCC_ADCPRE_PCLK_DIV_2 (0x0 << 14)
#define RCC_ADCPRE_PCLK_DIV_4 (0x1 << 14)
#define RCC_ADCPRE_PCLK_DIV_6 (0x2 << 14)
#define RCC_ADCPRE_PCLK_DIV_8 (0x3 << 14)
/* apb1 prescaler dividers */
#define RCC_APB1_HCLK_DIV_1 (0x0 << 8)
#define RCC_APB1_HCLK_DIV_2 (0x4 << 8)
#define RCC_APB1_HCLK_DIV_4 (0x5 << 8)
#define RCC_APB1_HCLK_DIV_8 (0x6 << 8)
#define RCC_APB1_HCLK_DIV_16 (0x7 << 8)
/* apb2 prescaler dividers */
#define RCC_APB2_HCLK_DIV_1 (0x0 << 11)
#define RCC_APB2_HCLK_DIV_2 (0x4 << 11)
#define RCC_APB2_HCLK_DIV_4 (0x5 << 11)
#define RCC_APB2_HCLK_DIV_8 (0x6 << 11)
#define RCC_APB2_HCLK_DIV_16 (0x7 << 11)
/* ahb prescaler dividers */
#define RCC_AHB_SYSCLK_DIV_1 (0x0 << 4)
#define RCC_AHB_SYSCLK_DIV_2 (0x8 << 4)
#define RCC_AHB_SYSCLK_DIV_4 (0x9 << 4)
#define RCC_AHB_SYSCLK_DIV_8 (0xA << 4)
#define RCC_AHB_SYSCLK_DIV_16 (0xB << 4)
#define RCC_AHB_SYSCLK_DIV_32 (0xC << 4)
#define RCC_AHB_SYSCLK_DIV_64 (0xD << 4)
#define RCC_AHB_SYSCLK_DIV_128 (0xD << 4)
#define RCC_AHB_SYSCLK_DIV_256 (0xE << 4)
#define RCC_AHB_SYSCLK_DIV_512 (0xF << 4)
/* pll multipliers */
#define RCC_PLLMUL_2 (0x0 << 18)
#define RCC_PLLMUL_3 (0x1 << 18)
#define RCC_PLLMUL_4 (0x2 << 18)
#define RCC_PLLMUL_5 (0x3 << 18)
#define RCC_PLLMUL_6 (0x4 << 18)
#define RCC_PLLMUL_7 (0x5 << 18)
#define RCC_PLLMUL_8 (0x6 << 18)
#define RCC_PLLMUL_9 (0x7 << 18)
#define RCC_PLLMUL_10 (0x8 << 18)
#define RCC_PLLMUL_11 (0x9 << 18)
#define RCC_PLLMUL_12 (0xA << 18)
#define RCC_PLLMUL_13 (0xB << 18)
#define RCC_PLLMUL_14 (0xC << 18)
#define RCC_PLLMUL_15 (0xD << 18)
#define RCC_PLLMUL_16 (0xE << 18)
/* prescalers */
enum {
RCC_PRESCALER_AHB,
RCC_PRESCALER_APB1,
RCC_PRESCALER_APB2,
RCC_PRESCALER_USB,
RCC_PRESCALER_ADC
};
// RCC Devices
enum {
RCC_GPIOA,
RCC_GPIOB,
RCC_GPIOC,
RCC_GPIOD,
RCC_GPIOE, // High-density devices only (Maple Native)
RCC_GPIOF, // High-density devices only (Maple Native)
RCC_GPIOG, // High-density devices only (Maple Native)
RCC_AFIO,
RCC_ADC1,
RCC_ADC2,
RCC_USART1,
RCC_USART2,
RCC_USART3,
RCC_USART4, // High-density devices only (Maple Native)
RCC_USART5, // High-density devices only (Maple Native)
RCC_TIMER1,
RCC_TIMER2,
RCC_TIMER3,
RCC_TIMER4,
RCC_TIMER5, // High-density devices only (Maple Native)
RCC_TIMER6, // High-density devices only (Maple Native)
RCC_TIMER7, // High-density devices only (Maple Native)
RCC_TIMER8, // High-density devices only (Maple Native)
RCC_SPI1,
RCC_SPI2,
RCC_FSMC, // High-density devices only (Maple Native)
RCC_DAC, // High-density devices only (Maple Native)
};
void rcc_clk_init(uint32 sysclk_src, uint32 pll_src, uint32 pll_mul);
void rcc_clk_enable(uint32 dev);
void rcc_reset_dev(uint32 dev);
void rcc_set_prescaler(uint32 prescaler, uint32 divider);
#endif
|
