From 1b9ddfb1aecb4c57812db79e5336b07362755796 Mon Sep 17 00:00:00 2001
From: Tom Pittenger <tom.pittenger@krausaerospace.com>
Date: Fri, 15 Mar 2024 21:19:54 -0700
Subject: [PATCH] AP_DAC: apply unity gain

---
 libraries/AP_DAC/AP_DAC_DACx0501.cpp | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/libraries/AP_DAC/AP_DAC_DACx0501.cpp b/libraries/AP_DAC/AP_DAC_DACx0501.cpp
index 1cb2cf6d28ff34..dcb5be6a79262b 100644
--- a/libraries/AP_DAC/AP_DAC_DACx0501.cpp
+++ b/libraries/AP_DAC/AP_DAC_DACx0501.cpp
@@ -74,7 +74,15 @@ void AP_DAC_DACx0501::init()
         return;
     }
 
+    _dev->set_retries(10);
+    // Set gain to unity
+    uint8_t buf[3];
+    buf[0] = DACx0501_REG_GAIN;
+    buf[1] = 0;
+    buf[2] = 0;
+    UNUSED_RESULT(_dev->transfer(buf, sizeof(buf), nullptr, 0));
     _dev->set_retries(3);
+
     _dev->register_periodic_callback(20 * 1000, FUNCTOR_BIND_MEMBER(&AP_DAC_DACx0501::thread, void));
 }