From fa2d012fd3924318e4f1f713919bfdc0b964efe7 Mon Sep 17 00:00:00 2001
From: Rahix <rahix@rahix.de>
Date: Fri, 31 May 2024 22:23:35 +0200
Subject: [PATCH] Disallow automatic startup

If the start/stop switch is set before air pressure is present, do not
automatically start the process.  To start from such a situation, the
start/stop switch first needs to be turned off, then turned on again.
---
 src/main.rs | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/src/main.rs b/src/main.rs
index a10dfe8..5817cd6 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -41,13 +41,17 @@ pi::process_image! {
         pub running: (X, 200, 0),
         pub faulted: (X, 200, 1),
         pub state: (X, 200, 2),
+        pub pressure_ok: (X, 200, 3),
     }
 }
 
 fn program(inp: Pii, mut out: PiqMut, now: profirust::time::Instant) {
     let now = u64::try_from(now.total_millis()).unwrap();
 
-    let running = inp.want_run() && (*out.running() || inp.bpb1());
+    let pressure_ok = inp.bpb1() && (*out.pressure_ok() || !inp.want_run());
+    *out.pressure_ok() = pressure_ok;
+
+    let running = inp.want_run() && (*out.running() || *out.pressure_ok());
     let mut faulted = *out.faulted() && running;
     *out.pza1_orange() = faulted;
     *out.pza1_blue() = !running && !faulted;