From 56a294123244114a52638d8ea8515b8f1c9f71f8 Mon Sep 17 00:00:00 2001
From: Bob Long <robertlong13@gmail.com>
Date: Tue, 10 Dec 2024 15:21:04 +1100
Subject: [PATCH] AP_ICEngine_TCA9554: add fuel pump power control

New aircraft have the fuel pump connected to the TCA9554 instead of the
ECU. This commit simply runs the fuel pump when the engine is running.
---
 libraries/AP_ICEngine/AP_ICEngine.cpp         | 4 ++++
 libraries/AP_ICEngine/AP_ICEngine_TCA9554.cpp | 3 +++
 libraries/AP_ICEngine/AP_ICEngine_TCA9554.h   | 2 ++
 3 files changed, 9 insertions(+)

diff --git a/libraries/AP_ICEngine/AP_ICEngine.cpp b/libraries/AP_ICEngine/AP_ICEngine.cpp
index 7863037460..d7785a32e7 100644
--- a/libraries/AP_ICEngine/AP_ICEngine.cpp
+++ b/libraries/AP_ICEngine/AP_ICEngine.cpp
@@ -643,6 +643,10 @@ void AP_ICEngine::set_ignition(bool on)
     }
 #endif // AP_RELAY_ENABLED
 
+#if AP_ICENGINE_TCA9554_STARTER_ENABLED
+    tca9554_starter.set_ignition(on);
+#endif
+
 }
 
 /*
diff --git a/libraries/AP_ICEngine/AP_ICEngine_TCA9554.cpp b/libraries/AP_ICEngine/AP_ICEngine_TCA9554.cpp
index dae3247ecc..a7a738d389 100644
--- a/libraries/AP_ICEngine/AP_ICEngine_TCA9554.cpp
+++ b/libraries/AP_ICEngine/AP_ICEngine_TCA9554.cpp
@@ -103,6 +103,9 @@ void AP_ICEngine_TCA9554::set_starter(bool on, AP_Int8 crank_direction)
     if (crank_direction) {
         value |= REVERSE;
     }
+    if (ignition_on) {
+        value |= FUEL_PUMP;
+    }
     TCA9554_set(value);
 }
 
diff --git a/libraries/AP_ICEngine/AP_ICEngine_TCA9554.h b/libraries/AP_ICEngine/AP_ICEngine_TCA9554.h
index 8740245b75..a31b54663a 100644
--- a/libraries/AP_ICEngine/AP_ICEngine_TCA9554.h
+++ b/libraries/AP_ICEngine/AP_ICEngine_TCA9554.h
@@ -9,6 +9,7 @@
 
 class AP_ICEngine_TCA9554 {
 public:
+    void set_ignition(bool on) { ignition_on = on; }
     void set_starter(bool on, AP_Int8 crank_direction);
 
 private:
@@ -17,6 +18,7 @@ class AP_ICEngine_TCA9554 {
     uint8_t last_state;
 
     bool initialised;
+    bool ignition_on;
 
     bool TCA9554_init();
     void TCA9554_set(uint8_t value);