2 * Copyright (c) 2019 Tilman Sauerbeck (tilman at code-monkey de)
4 * Permission is hereby granted, free of charge, to any person obtaining
5 * a copy of this software and associated documentation files (the
6 * "Software"), to deal in the Software without restriction, including
7 * without limitation the rights to use, copy, modify, merge, publish,
8 * distribute, sublicense, and/or sell copies of the Software, and to
9 * permit persons to whom the Software is furnished to do so, subject to
10 * the following conditions:
12 * The above copyright notice and this permission notice shall be
13 * included in all copies or substantial portions of the Software.
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
16 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
17 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
18 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
19 * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
20 * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
21 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
26 type Reg8 = register::Register<u8>;
27 type Reg32 = register::Register<u32>;
29 const SIM_BASE: u32 = 0x40047000;
31 const SIM_CLKDIV1: u32 = SIM_BASE + 0x1044;
33 const SIM_CLKDIV1_OUTDIV4_SHIFT: u32 = 16;
34 const SIM_CLKDIV1_OUTDIV1_SHIFT: u32 = 28;
36 const MCG_BASE: u32 = 0x40064000;
38 const MCG_C1: u32 = MCG_BASE + 0;
39 const MCG_C2: u32 = MCG_BASE + 1;
40 const MCG_C4: u32 = MCG_BASE + 3;
41 const MCG_C5: u32 = MCG_BASE + 4;
42 const MCG_C6: u32 = MCG_BASE + 5;
43 const MCG_S : u32 = MCG_BASE + 6;
45 const MCG_C1_FRDIV_SHIFT: u32 = 3;
46 const MCG_C1_CLKS_SHIFT: u32 = 6;
48 const MCG_C2_IRCS: u8 = 1 << 0;
49 const MCG_C2_EREFS0: u8 = 1 << 2;
50 const MCG_C2_RANGE0_SHIFT: u32 = 4;
52 const MCG_C4_DMX32: u8 = 1 << 7;
53 const MCG_C4_DRST_DRS_MASK: u8 = 3 << 5;
55 const MCG_C5_PLLSTEN0: u8 = 1 << 5;
56 const MCG_C5_PRDIV0_SHIFT: u32 = 0;
58 const MCG_C6_VDIV0_SHIFT: u32 = 0;
59 const MCG_C6_CME0: u8 = 1 << 5;
60 const MCG_C6_PLLS: u8 = 1 << 6;
62 const MCG_S_CLKST_SHIFT: u32 = 2;
63 const MCG_S_CLKST_MASK: u8 = 3 << MCG_S_CLKST_SHIFT;
64 const MCG_S_IREFST: u8 = 1 << 4;
65 const MCG_S_LOCK0: u8 = 1 << 6;
67 fn configure_clkdiv() {
68 let mut clkdiv1 = Reg32::new(SIM_CLKDIV1);
70 clkdiv1.write(1 << SIM_CLKDIV1_OUTDIV4_SHIFT);
71 clkdiv1.modify(|v| v | (1 << SIM_CLKDIV1_OUTDIV1_SHIFT));
75 let mut c2 = Reg8::new(MCG_C2);
76 c2.write((2 << MCG_C2_RANGE0_SHIFT) | MCG_C2_EREFS0 | MCG_C2_IRCS);
78 let mut c1 = Reg8::new(MCG_C1);
79 c1.write((2 << MCG_C1_CLKS_SHIFT) | (3 << MCG_C1_FRDIV_SHIFT));
81 let mut c4 = Reg8::new(MCG_C4);
82 c4.modify(|v| v & !MCG_C4_DMX32 & !MCG_C4_DRST_DRS_MASK);
84 let mut c5 = Reg8::new(MCG_C5);
85 c5.write(MCG_C5_PLLSTEN0 | (11 << MCG_C5_PRDIV0_SHIFT));
87 let mut c6 = Reg8::new(MCG_C6);
88 c6.write(24 << MCG_C6_VDIV0_SHIFT);
90 let s = Reg8::new(MCG_S);
92 while (s.read() & MCG_S_IREFST) != 0 {
95 while (s.read() & MCG_S_CLKST_MASK) != (2 << MCG_S_CLKST_SHIFT) {
100 let mut c1 = Reg8::new(MCG_C1);
101 c1.write((2 << MCG_C1_CLKS_SHIFT) | (3 << MCG_C1_FRDIV_SHIFT));
103 let mut c2 = Reg8::new(MCG_C2);
104 c2.write((2 << MCG_C2_RANGE0_SHIFT) | MCG_C2_EREFS0 | MCG_C2_IRCS);
106 let mut c5 = Reg8::new(MCG_C5);
107 c5.write(MCG_C5_PLLSTEN0 | (11 << MCG_C5_PRDIV0_SHIFT));
109 let mut c6 = Reg8::new(MCG_C6);
110 c6.write(MCG_C6_PLLS | 24 << MCG_C6_VDIV0_SHIFT);
112 let s = Reg8::new(MCG_S);
114 while (s.read() & MCG_S_CLKST_MASK) != (2 << MCG_S_CLKST_SHIFT) {
117 while (s.read() & MCG_S_LOCK0) == 0 {
122 let mut c1 = Reg8::new(MCG_C1);
123 c1.write(3 << MCG_C1_FRDIV_SHIFT);
125 let mut c2 = Reg8::new(MCG_C2);
126 c2.write((2 << MCG_C2_RANGE0_SHIFT) | MCG_C2_EREFS0 | MCG_C2_IRCS);
128 let mut c5 = Reg8::new(MCG_C5);
129 c5.write(MCG_C5_PLLSTEN0 | (11 << MCG_C5_PRDIV0_SHIFT));
131 let mut c6 = Reg8::new(MCG_C6);
132 c6.write(MCG_C6_PLLS | 24 << MCG_C6_VDIV0_SHIFT);
134 let s = Reg8::new(MCG_S);
136 while (s.read() & MCG_S_CLKST_MASK) != (3 << MCG_S_CLKST_SHIFT) {
139 c6.modify(|v| v | MCG_C6_CME0);
142 pub unsafe fn configure() {