Make ArmPackManager cache a static variable (to avoid reading index.json for each target).

tools/export/cmsis/__init__.py

@@ -30,6 +30,7 @@ class DeviceCMSIS():
     """CMSIS Device class
 
     Encapsulates target information retrieved by arm-pack-manager"""
+    cache = Cache(True, False)
     def __init__(self, target):
         target_info = self.check_supported(target)
         if not target_info:
@@ -48,17 +49,16 @@ class DeviceCMSIS():
 
     @staticmethod
     def check_supported(target):
-        cache = Cache(True, False)
         t = TARGET_MAP[target]
         try:
             cpu_name = t.device_name
-            target_info = cache.index[cpu_name]
+            target_info = DeviceCMSIS.cache.index[cpu_name]
         # Target does not have device name or pdsc file
         except:
             try:
                 # Try to find the core as a generic CMSIS target
                 cpu_name = DeviceCMSIS.cpu_cmsis(t.core)
-                target_info = cache.index[cpu_name]
+                target_info = DeviceCMSIS.index[cpu_name]
             except:
                 return False
         target_info["_cpu_name"] = cpu_name

tools/project.py

@@ -234,7 +234,7 @@ def main():
         # Export to selected toolchain
     exporter, toolchain_name = get_exporter_toolchain(options.ide)
     if options.mcu not in exporter.TARGETS:
-        args_error(parser, "%s not supported by %s")
+        args_error(parser, "%s not supported by %s"%(options.mcu,options.ide))
     profile = extract_profile(parser, options, toolchain_name)
     export(options.mcu, options.ide, build=options.build,
            src=options.source_dir, macros=options.macros,