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_SOPT2: u32 = SIM_BASE + 0x1004;
33 const SIM_CLKDIV1: u32 = SIM_BASE + 0x1044;
35 const SIM_SOPT2_PLLFLLSEL: u32 = 1 << 16;
37 const SIM_CLKDIV1_OUTDIV4_SHIFT: u32 = 16;
38 const SIM_CLKDIV1_OUTDIV1_SHIFT: u32 = 28;
40 const MCG_BASE: u32 = 0x40064000;
42 const MCG_C1: u32 = MCG_BASE + 0;
43 const MCG_C2: u32 = MCG_BASE + 1;
44 const MCG_C4: u32 = MCG_BASE + 3;
45 const MCG_C5: u32 = MCG_BASE + 4;
46 const MCG_C6: u32 = MCG_BASE + 5;
47 const MCG_S : u32 = MCG_BASE + 6;
49 const MCG_C1_FRDIV_SHIFT: u32 = 3;
50 const MCG_C1_CLKS_SHIFT: u32 = 6;
52 const MCG_C2_IRCS: u8 = 1 << 0;
53 const MCG_C2_EREFS0: u8 = 1 << 2;
54 const MCG_C2_RANGE0_SHIFT: u32 = 4;
56 const MCG_C4_DMX32: u8 = 1 << 7;
57 const MCG_C4_DRST_DRS_MASK: u8 = 3 << 5;
59 const MCG_C5_PLLSTEN0: u8 = 1 << 5;
60 const MCG_C5_PRDIV0_SHIFT: u32 = 0;
62 const MCG_C6_VDIV0_SHIFT: u32 = 0;
63 const MCG_C6_CME0: u8 = 1 << 5;
64 const MCG_C6_PLLS: u8 = 1 << 6;
66 const MCG_S_CLKST_SHIFT: u32 = 2;
67 const MCG_S_CLKST_MASK: u8 = 3 << MCG_S_CLKST_SHIFT;
68 const MCG_S_IREFST: u8 = 1 << 4;
69 const MCG_S_LOCK0: u8 = 1 << 6;
71 fn configure_clkdiv() {
72 let mut clkdiv1 = Reg32::new(SIM_CLKDIV1);
74 clkdiv1.write(1 << SIM_CLKDIV1_OUTDIV4_SHIFT);
75 clkdiv1.modify(|v| v | (1 << SIM_CLKDIV1_OUTDIV1_SHIFT));
79 let mut c2 = Reg8::new(MCG_C2);
80 c2.write((2 << MCG_C2_RANGE0_SHIFT) | MCG_C2_EREFS0 | MCG_C2_IRCS);
82 let mut c1 = Reg8::new(MCG_C1);
83 c1.write((2 << MCG_C1_CLKS_SHIFT) | (3 << MCG_C1_FRDIV_SHIFT));
85 let mut c4 = Reg8::new(MCG_C4);
86 c4.modify(|v| v & !MCG_C4_DMX32 & !MCG_C4_DRST_DRS_MASK);
88 let mut c5 = Reg8::new(MCG_C5);
89 c5.write(MCG_C5_PLLSTEN0 | (11 << MCG_C5_PRDIV0_SHIFT));
91 let mut c6 = Reg8::new(MCG_C6);
92 c6.write(24 << MCG_C6_VDIV0_SHIFT);
94 let s = Reg8::new(MCG_S);
96 while (s.read() & MCG_S_IREFST) != 0 {
99 while (s.read() & MCG_S_CLKST_MASK) != (2 << MCG_S_CLKST_SHIFT) {
104 let mut c1 = Reg8::new(MCG_C1);
105 c1.write((2 << MCG_C1_CLKS_SHIFT) | (3 << MCG_C1_FRDIV_SHIFT));
107 let mut c2 = Reg8::new(MCG_C2);
108 c2.write((2 << MCG_C2_RANGE0_SHIFT) | MCG_C2_EREFS0 | MCG_C2_IRCS);
110 let mut c5 = Reg8::new(MCG_C5);
111 c5.write(MCG_C5_PLLSTEN0 | (11 << MCG_C5_PRDIV0_SHIFT));
113 let mut c6 = Reg8::new(MCG_C6);
114 c6.write(MCG_C6_PLLS | 24 << MCG_C6_VDIV0_SHIFT);
116 let s = Reg8::new(MCG_S);
118 while (s.read() & MCG_S_CLKST_MASK) != (2 << MCG_S_CLKST_SHIFT) {
121 while (s.read() & MCG_S_LOCK0) == 0 {
126 let mut c1 = Reg8::new(MCG_C1);
127 c1.write(3 << MCG_C1_FRDIV_SHIFT);
129 let mut c2 = Reg8::new(MCG_C2);
130 c2.write((2 << MCG_C2_RANGE0_SHIFT) | MCG_C2_EREFS0 | MCG_C2_IRCS);
132 let mut c5 = Reg8::new(MCG_C5);
133 c5.write(MCG_C5_PLLSTEN0 | (11 << MCG_C5_PRDIV0_SHIFT));
135 let mut c6 = Reg8::new(MCG_C6);
136 c6.write(MCG_C6_PLLS | 24 << MCG_C6_VDIV0_SHIFT);
138 let s = Reg8::new(MCG_S);
140 while (s.read() & MCG_S_CLKST_MASK) != (3 << MCG_S_CLKST_SHIFT) {
143 c6.modify(|v| v | MCG_C6_CME0);
146 pub unsafe fn configure() {
153 let mut sopt2 = Reg32::new(SIM_SOPT2);
156 v | SIM_SOPT2_PLLFLLSEL