[chirp_devel] [PATCH] [vx8] Add support for 8.33kHz airband step. Fixes #3425

[Mario Haustein]

# HG changeset patch
# User Mario Haustein <dm5aha at darc.de>
# Date 1530460330 -7200
#      Sun Jul 01 17:52:10 2018 +0200
# Node ID 4f6978a84b3e461b13c6e0f996d3bec058431b70
# Parent  e57a01e2106af3cb98101e37ee164612fe2f0dad
[vx8] Add support for 8.33kHz airband step. Fixes #3425

diff -r e57a01e2106a -r 4f6978a84b3e chirp/chirp_common.py
--- a/chirp/chirp_common.py	Wed Jun 20 06:10:36 2018 -0700
+++ b/chirp/chirp_common.py	Sun Jul 01 17:52:10 2018 +0200
@@ -1286,6 +1286,11 @@
     return (freq % 2500) == 0
 
 
+def is_8_33(freq):
+    """Returns True if @freq is reachable by a 8.33kHz step"""
+    return (freq % 25000) in [ 0, 8330, 16660 ]
+
+
 def required_step(freq):
     """Returns the simplest tuning step that is required to reach @freq"""
     if is_5_0(freq):
@@ -1296,6 +1301,8 @@
         return 6.25
     elif is_2_5(freq):
         return 2.5
+    elif is_8_33(freq):
+        return 8.33
     else:
         raise errors.InvalidDataError("Unable to calculate the required " +
                                       "tuning step for %i.%5i" %
@@ -1329,6 +1336,18 @@
     except errors.InvalidDataError:
         pass
 
+    try:
+        required_step(freq + 330)
+        return float(freq + 330)
+    except errors.InvalidDataError:
+        pass
+
+    try:
+        required_step(freq + 660)
+        return float(freq + 660)
+    except errors.InvalidDataError:
+        pass
+
     raise errors.InvalidDataError("Unable to correct rounded frequency " +
                                   format_freq(freq))
 
diff -r e57a01e2106a -r 4f6978a84b3e chirp/drivers/vx8.py
--- a/chirp/drivers/vx8.py	Wed Jun 20 06:10:36 2018 -0700
+++ b/chirp/drivers/vx8.py	Sun Jul 01 17:52:10 2018 +0200
@@ -336,7 +336,7 @@
 STEPS = list(chirp_common.TUNING_STEPS)
 STEPS.remove(30.0)
 STEPS.append(100.0)
-STEPS.insert(2, 0.0)  # There is a skipped tuning step at index 2 (?)
+STEPS.insert(2, 8.33)  # Index 2 is 8.33kHz airband step
 SKIPS = ["", "S", "P"]
 VX8_DTMF_CHARS = list("0123456789ABCD*#-")