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 Reg32 = register::Register<u32>;
28 const NVIC_BASE: u32 = 0xe000e100;
30 const NVIC_ISER: u32 = NVIC_BASE + 0x000;
31 const NVIC_ICER: u32 = NVIC_BASE + 0x080;
32 const NVIC_IP : u32 = NVIC_BASE + 0x300;
34 pub fn enable_irq(irq_number: u32) {
35 let mut iser = Reg32::new(NVIC_ISER);
37 iser.write(1 << irq_number);
40 pub fn disable_irq(irq_number: u32) {
41 let mut icer = Reg32::new(NVIC_ICER);
43 icer.write(1 << irq_number);
46 fn ip_offset(irq_number: u32) -> u32 {
50 fn ip_shift(irq_number: u32) -> u32 {
54 pub fn set_priority(irq_number: u32, priority: u32) {
55 let mut ip = Reg32::new(NVIC_IP + ip_offset(irq_number));
60 m &= !(0xff << ip_shift(irq_number));
61 m |= priority << ip_shift(irq_number);