CHIRP

After fiddling more with this, the "Special Channels" button seems to work sometimes. When it doesn't work, it shows status "[0] Getting Bank information for memory 2" on the bottom of the display and following text is printed on the debug (running in Linux, the Mercurial snapshot version, chirpw executed from command line):

---8<---8<---
Exception in thread Thread-3:
Traceback (most recent call last):
File "/usr/lib/python2.7/threading.py", line 801, in bootstrap_inner
self.run()
File "/home/ktuulos/dev/chirp.hg/chirp/ui/common.py", line 261, in run
job.execute(self.radio)
File "/home/ktuulos/dev/chirp.hg/chirp/ui/bankedit.py", line 138, in execute
mappings = self.model.get_memory_mappings(mem)
File "/home/ktuulos/dev/chirp.hg/chirp/drivers/ft7800.py", line 519, in get_memory_mappings
self.precache()
File "/home/ktuulos/dev/chirp.hg/chirp/drivers/ft7800.py", line 461, in __precache
self.b2m_cache[bank.index] = self.get_bank_memories(bank)
File "/home/ktuulos/dev/chirp.hg/chirp/drivers/ft7800.py", line 504, in _get_bank_memories
c = self._radio._memobj.bank_channels[bank.index]
File "/home/ktuulos/dev/chirp.hg/chirp/bitwise.py", line 688, in __getattr_
raise AttributeError("No attribute %s in struct" % name)
AttributeError: No attribute bank_channels in struct
---8<---8<---

And one more update. The error requires, that the "Banks" page is visited before pressing Special Channels button. The traceback is given from Banks page selection.

So, the updated steps to reproduce the problem is:
Step1: Open Chirpw from command line or from Windows menu
Step2: Open image file (attached)
Step3: Select Banks page.
--> the traceback is given
Step4: Select Memories page.
--> memories are still visible.
Step5: Press "Special Channels" button.
--> memories disappear

I studied the ft7800.py file, where FT-8900 memory is defined. The problem is, that MEM_FORMAT8900 does not have "bank_channels" definition.

MEM_FORMAT_8900 = """
#seekto 0x0708;
struct {
u8 used:1,
skip:2,
sub_used:1,
unknown2:1,
duplex:3;
bbcd freq[3];
u8 mode:2,
nameused:1,
unknown4:1,
power:2,
tmode:2;
bbcd split[3];
u8 unknown5:2,
tone:6;
u8 namevalid:1,
dtcs:7;
u8 name[6];
} memory[799];

#seekto 0x51C8;
struct {
u8 skip0:2,
skip1:2,
skip2:2,
skip3:2;
} flags[400];

#seekto 0x7B48;
u8 checksum;
"""

The correction for this problem is in the following diff output:

diff -r 62b4cbefa867 chirp/drivers/ft7800.py
--- a/chirp/drivers/ft7800.py   Mon Dec 03 08:31:11 2018 -0800
+++ b/chirp/drivers/ft7800.py   Tue Dec 11 22:54:42 2018 +0200
@@ -977,6 +977,8 @@
 
     MODES = ["FM", "NFM", "AM"]
 
+    del FT8800Radio.get_bank_model
+
     def process_mmap(self):
         self._memobj = bitwise.parse(MEM_FORMAT_8900, self._mmap)
 

I'll send this patch to the mailing list.