From 20ee5b2d3788d6c667baa7d779e7d7f3fda5c47f Mon Sep 17 00:00:00 2001
From: Thomas Watson <twatson52@icloud.com>
Date: Sun, 10 Dec 2023 11:29:32 -0600
Subject: [PATCH] AP_HAL_Empty: eliminate legacy UART ordering/references

Fourth serial port (SERIAL2) added purely for consistency.
---
 libraries/AP_HAL_Empty/HAL_Empty_Class.cpp | 29 +++++++++++-----------
 1 file changed, 15 insertions(+), 14 deletions(-)

diff --git a/libraries/AP_HAL_Empty/HAL_Empty_Class.cpp b/libraries/AP_HAL_Empty/HAL_Empty_Class.cpp
index a05acc59d0..9d03bcabf7 100644
--- a/libraries/AP_HAL_Empty/HAL_Empty_Class.cpp
+++ b/libraries/AP_HAL_Empty/HAL_Empty_Class.cpp
@@ -9,9 +9,10 @@
 
 using namespace Empty;
 
-static UARTDriver uartADriver;
-static UARTDriver uartBDriver;
-static UARTDriver uartCDriver;
+static UARTDriver serial0Driver;
+static UARTDriver serial1Driver;
+static UARTDriver serial2Driver;
+static UARTDriver serial3Driver;
 static SPIDeviceManager spiDeviceManager;
 static AnalogIn analogIn;
 static Storage storageDriver;
@@ -25,20 +26,20 @@ static Flash flashDriver;
 
 HAL_Empty::HAL_Empty() :
     AP_HAL::HAL(
-        &uartADriver,
-        &uartCDriver, // ordering captures the historical use of uartB as SERIAL3
-        nullptr,            /* no uartD */
-        &uartBDriver,
-        nullptr,            /* no uartE */
-        nullptr,            /* no uartF */
-        nullptr,            /* no uartG */
-        nullptr,            /* no uartH */
-        nullptr,            /* no uartI */
-        nullptr,            /* no uartJ */
+        &serial0Driver,
+        &serial1Driver,
+        &serial2Driver,
+        &serial3Driver,
+        nullptr,            /* no SERIAL4 */
+        nullptr,            /* no SERIAL5 */
+        nullptr,            /* no SERIAL6 */
+        nullptr,            /* no SERIAL7 */
+        nullptr,            /* no SERIAL8 */
+        nullptr,            /* no SERIAL9 */
         &spiDeviceManager,
         &analogIn,
         &storageDriver,
-        &uartADriver,
+        &serial0Driver,
         &gpioDriver,
         &rcinDriver,
         &rcoutDriver,