ublox-gsm-config: Improve check of bridge and ecm modes

BugzID: 57325

recipes-connectivity/ublox-gsm-config/files/modem-config-dump.py

@@ -30,8 +30,7 @@ def default_parser(output):
     x = re.search('(.*)\n.*\nOK',output)
     return x.group(1)
 
-def read_config(ser, config_file, full_config_file, cmd, label='', parser=default_parser):
-
+def execute_command(ser, cmd):
     while True:
         try:
             ser.flushInput()
@@ -45,6 +44,13 @@ def read_config(ser, config_file, full_config_file, cmd, label='', parser=defaul
             print("Exception : " + str(e))
             time.sleep(1)
             continue
+    return s
+
+def read_config(ser, config_file, full_config_file, cmd, label='', parser=default_parser):
+    s = execute_command(ser, cmd)
+    if s is None:
+        print('Failed to execute command : ' + str(cmd))
+        return
 
     full_conf = label + '\n' + s.decode('utf-8').strip("OK")
     conf = (label + ':').ljust(20) + parser(s.decode('utf-8')) + '\n'
@@ -65,4 +71,19 @@ def dump_modem_config(ser):
 
     read_config(ser, config_file, full_config_file, b'AT+UCGDFLT?', 'Default APN', apn_parser)
     read_config(ser, config_file, full_config_file, b'AT+UBMCONF?', 'Mode', mode_parser)
-    read_config(ser, config_file, full_config_file, b'AT+UUSBCONF?', 'USBprofile', usb_profile_parser)
+    read_config(ser, config_file, full_config_file, b'AT+UUSBCONF?', 'USBprofile', usb_profile_parser)
+
+def get_usb_profile(ser):
+    s = execute_command(ser, b'AT+UUSBCONF?')
+    if s is None:
+        print('Failed to get UUSBCONF')
+        return None
+
+    return usb_profile_parser(s.decode('utf-8'))
+
+def get_mode(ser):
+    s = execute_command(ser, b'AT+UBMCONF?')
+    if s is None:
+        print('Failed to get UBMCONF')
+        return None
+    return mode_parser(s.decode('utf-8'))

recipes-connectivity/ublox-gsm-config/files/ublox-gsm-config.py

@@ -144,14 +144,19 @@ def main():
     ser = serial.Serial(SERIAL_DEV, 115200, timeout=0.5)
 
     rst = False
-    if not os.path.exists(WWAN_DEV):
+
+    if 'Bridge' !=  config_dump.get_mode(ser):
         print("Setting up bridge mode")
         execute_and_check(ser, b'AT+UBMCONF=2')
+        rst = True
 
+    if 'ECM' != config_dump.get_usb_profile(ser):
         print("Setting up USB mode to ECM")
         execute_and_check(ser, b'AT+UUSBCONF=2,"ECM",0')
         rst = True
+
     rst = sim_config(ser) or rst
+
     if rst:
         print("Resetting modem")
         ser.write(b'AT+CFUN=16\r')