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examples: shell: use 32-bit timer csr

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Signed-off-by: Sean Cross <sean@xobs.io>
This commit is contained in:
Sean Cross 2020-03-10 16:41:48 +08:00
parent 8b57b8c36b
commit c09b140306
1 changed files with 6 additions and 14 deletions
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20
examples/shell/src/timer.rs
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@ -6,7 +6,7 @@ fn timer_tick(_irq_no: usize, _arg: *mut usize) {
let ptr = TIMER_BASE as *mut usize;
// acknowledge the timer
unsafe { ptr.add(15).write_volatile(1) };
unsafe { ptr.add(6).write_volatile(1) };
}
pub fn init() {
@ -34,37 +34,29 @@ pub fn init() {
// Set EV_ENABLE
let ptr = TIMER_BASE as *mut usize;
unsafe { ptr.add(16).write_volatile(1) };
unsafe { ptr.add(7).write_volatile(1) };
}
pub fn load(value: u32) {
let buf = value.to_le_bytes();
let ptr = TIMER_BASE as *mut usize;
unsafe {
ptr.add(0).write_volatile(buf[0] as usize);
ptr.add(1).write_volatile(buf[1] as usize);
ptr.add(2).write_volatile(buf[2] as usize);
ptr.add(3).write_volatile(buf[3] as usize);
ptr.add(0).write_volatile(value as usize);
}
}
pub fn reload(value: u32) {
let buf = value.to_le_bytes();
let ptr = TIMER_BASE as *mut usize;
unsafe {
ptr.add(4).write_volatile(buf[0] as usize);
ptr.add(5).write_volatile(buf[1] as usize);
ptr.add(6).write_volatile(buf[2] as usize);
ptr.add(7).write_volatile(buf[3] as usize);
ptr.add(1).write_volatile(value as usize);
}
}
pub fn en(en: bool) {
let ptr = TIMER_BASE as *mut usize;
if en {
unsafe { ptr.add(8).write_volatile(1) };
unsafe { ptr.add(2).write_volatile(1) };
}
else {
unsafe { ptr.add(8).write_volatile(0) };
unsafe { ptr.add(2).write_volatile(0) };
}
}