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grabber: refactor state machine

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This commit is contained in:
Robert Jördens 2018-08-07 17:27:36 +02:00
parent 6cd2432e30
commit f7678cc24a
1 changed files with 60 additions and 34 deletions
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94
artiq/firmware/libboard_artiq/grabber.rs
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@ -1,14 +1,21 @@
use board_misoc::csr;
#[derive(PartialEq)]
#[derive(PartialEq, Clone, Copy)]
enum State {
Down,
WaitResolution,
Up
Reset,
ExitReset,
Lock,
Align,
Watch
}
static mut GRABBER_STATE: [State; csr::GRABBER_LEN] = [State::Down; csr::GRABBER_LEN];
static mut GRABBER_RESOLUTION: [(u16, u16); csr::GRABBER_LEN] = [(0, 0); csr::GRABBER_LEN];
struct Info {
state: State,
frame_size: (u16, u16),
}
static mut INFO: [Info; csr::GRABBER_LEN] =
[Info { state: State::Reset, frame_size: (0, 0) }; csr::GRABBER_LEN];
fn get_pll_reset(g: usize) -> bool {
unsafe { (csr::GRABBER[g].pll_reset_read)() != 0 }
@ -16,7 +23,7 @@ fn get_pll_reset(g: usize) -> bool {
fn set_pll_reset(g: usize, reset: bool) {
let val = if reset { 1 } else { 0 };
unsafe { (csr::GRABBER[g].pll_reset_write)(val) }
unsafe { (csr::GRABBER[g].pll_reset_write)(val) }
}
fn pll_locked(g: usize) -> bool {
@ -86,43 +93,62 @@ fn get_video_clock(g: usize) -> u32 {
pub fn tick() {
for g in 0..csr::GRABBER.len() {
if unsafe { GRABBER_STATE[g] != State::Down } {
if !clock_pattern_ok(g) || !pll_locked(g) {
let next = match unsafe { INFO[g].state } {
State::Reset => {
set_pll_reset(g, true);
unsafe { GRABBER_STATE[g] = State::Down; }
info!("grabber{} is down", g);
unsafe { INFO[g].frame_size = (0, 0); }
State::ExitReset
}
if unsafe { GRABBER_STATE[g] == State::WaitResolution } {
let last_xy = get_last_pixels(g);
unsafe { GRABBER_RESOLUTION[g] = last_xy; }
info!("grabber{} frame size: {}x{}",
g, last_xy.0 + 1, last_xy.1 + 1);
info!("grabber{} video clock: {}MHz", g, get_video_clock(g));
unsafe { GRABBER_STATE[g] = State::Up; }
} else {
let last_xy = get_last_pixels(g);
if unsafe { last_xy != GRABBER_RESOLUTION[g] } {
info!("grabber{} frame size: {}x{}",
g, last_xy.0 + 1, last_xy.1 + 1);
unsafe { GRABBER_RESOLUTION[g] = last_xy; }
State::ExitReset => {
if get_pll_reset(g) {
set_pll_reset(g, false);
State::Lock
} else {
State::ExitReset
}
}
} else {
if get_pll_reset(g) {
set_pll_reset(g, false);
} else {
State::Lock => {
if pll_locked(g) {
info!("grabber{} locked: {}MHz", g, get_video_clock(g));
State::Align
} else {
State::Lock
}
}
State::Align => {
if pll_locked(g) {
info!("grabber{} PLL is locked", g);
if clock_align(g) {
info!("grabber{} is up", g);
unsafe { GRABBER_STATE[g] = State::WaitResolution; }
info!("grabber{} alignment success", g);
State::Watch
} else {
set_pll_reset(g, true);
info!("grabber{} alignment failure", g);
State::Reset
}
} else {
set_pll_reset(g, true);
info!("grabber{} lock lost", g);
State::Reset
}
}
}
State::Watch => {
if pll_locked(g) {
if clock_pattern_ok(g) {
let last_xy = get_last_pixels(g);
if last_xy != unsafe { INFO[g].frame_size } {
info!("grabber{} frame size: {}x{}",
g, last_xy.0 + 1, last_xy.1 + 1);
unsafe { INFO[g].frame_size = last_xy }
}
State::Watch
} else {
info!("grabber{} alignment lost", g);
State::Reset
}
} else {
info!("grabber{} lock lost", g);
State::Reset
}
}
};
unsafe { INFO[g].state = next; }
}
}