em9304: add converter for .emp to .c

chipset/em9301/.gitignore

@@ -0,0 +1 @@
+*.emp

chipset/em9301/convert_emp.py

@@ -0,0 +1,81 @@
+#!/usr/bin/env python
+# BlueKitchen GmbH (c) 2018
+import sys
+
+usage = '''This script converts a set of configurations and patches in .emp format for EM9304
+into C files to be used with BTstack.
+
+Usage:
+$ ./convert_emp.py container.emp
+'''
+
+header = '''/** 
+ * BASENAME.h converted from BASENAME.emp
+ */
+
+#ifndef __BASENAME_H
+#define __BASENAME_H
+
+#include <stdint.h>
+extern const uint8_t  container_blob_data[];
+extern const uint32_t container_blob_size;
+extern const char *   container_blob_name;
+
+#endif
+'''
+
+code_start = '''/** 
+ * BASENAME.c converted from BASENAME.bin
+ * Size: SIZE bytes 
+ */
+
+#include <stdint.h>
+
+const char *   container_blob_name = "BASENAME";
+
+const uint8_t  container_blob_data[] = {
+'''
+
+code_end = '''
+};
+const uint32_t container_blob_size = sizeof(container_blob_data);
+'''
+
+def convert_emp(basename):
+	emp_name = basename + '.emp'
+	print ('Reading %s' % emp_name)
+
+	with open (emp_name, 'rb') as fin:
+		firm = fin.read()
+		size = len(firm)
+
+		# reduce size by 4 as it ends with four zero bytes that indicate the end of the file
+		size -= 4
+		print ('Size %u' % size)
+
+
+		# don't write .h file as we would need to store its name in btstack_chipset_em9301.c, too
+		# with open(basename + '.h', 'w') as fout:
+		# 	fout.write(header.replace('BASENAME',basename));
+
+		with open(basename + '.c', 'w') as fout:
+			fout.write(code_start.replace('BASENAME',basename).replace('SIZE',str(size)));
+			fout.write('    ')
+			for i in range(0,size):
+				if i % 1000 == 0:
+					print ('- Write %05u/%05u' % (i, size))
+				byte = ord(firm[i])
+				fout.write("0x{0:02x}, ".format(byte))
+				if (i & 0x0f) == 0x0f:
+					fout.write('\n    ')
+			fout.write(code_end);
+			print ('Done\n') 
+
+# check usage: 1 param
+if not len(sys.argv) == 2:
+    print(usage)
+    sys.exit(1)
+
+name = sys.argv[1]
+basename = name.replace('.emp','')
+convert_emp(basename)