added ignore freq compile option - use when frequency scanning, see README.md

freq_ignore.h

@@ -0,0 +1,30 @@
+/* Copyright 2023 One of Eleven
+ * https://github.com/DualTachyon
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *     Unless required by applicable law or agreed to in writing, software
+ *     distributed under the License is distributed on an "AS IS" BASIS,
+ *     WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *     See the License for the specific language governing permissions and
+ *     limitations under the License.
+ */
+
+#ifndef FREQ_IGNORE_H
+#define FREQ_IGNORE_H
+
+#include <stdint.h>
+
+#ifdef ENABLE_SCAN_IGNORE_LIST
+	void FI_clear_freq_ignored(void);
+	int  FI_freq_ignored(const uint32_t frequency);
+	void FI_add_freq_ignored(const uint32_t frequency);
+	void FI_sub_freq_ignored(const uint32_t frequency);
+#endif
+
+#endif
+