From a44c307f54dc56acd03c8b61eb4432bca1fbc086 Mon Sep 17 00:00:00 2001
From: Adam Wisher <37659188+mrwish7@users.noreply.github.com>
Date: Sun, 27 Aug 2023 13:12:39 +0100
Subject: [PATCH] Fix OIRT step rounding

Frequency modulo 3 should always equal 2 for the correct OIRT 30kHz steps with plus 20kHz offset.
---
 TEF6686_ESP32.ino | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/TEF6686_ESP32.ino b/TEF6686_ESP32.ino
index 6ddb358..d8e9979 100644
--- a/TEF6686_ESP32.ino
+++ b/TEF6686_ESP32.ino
@@ -454,7 +454,7 @@ void setup() {
       }
       break;
     case BAND_OIRT:
-      if (frequency % FREQ_OIRT_STEP_30K != 0) {
+      if (frequency % FREQ_OIRT_STEP_30K != 2) {
         Round30K(frequency_OIRT);
       }
       break;
@@ -1853,8 +1853,11 @@ void ShowStepSize() {
 }
 
 void Round30K(unsigned int freq) {
-  if (freq % FREQ_OIRT_STEP_30K < FREQ_OIRT_STEP_30K) {
-    frequency_OIRT = (freq - freq % FREQ_OIRT_STEP_30K);
+  if (freq % FREQ_OIRT_STEP_30K == 1) {
+    frequency_OIRT = (freq + 1);
+  }
+  else if (freq % FREQ_OIRT_STEP_30K == 0) {
+    frequency_OIRT = (freq - 1);
   }
 }