Add model data attribute: const (tensorflow#147)

On most Arduino platforms, this will ensure the model is stored in flash memory.

bug=fixes #142

Co-authored-by: Advait Jain <[email protected]>

Author: ddavis-2015

examples/magic_wand/magic_wand_model_data.cpp

@@ -10,7 +10,9 @@ See the License for the specific language governing permissions and
 limitations under the License.
 ==============================================================================*/
 
-unsigned char g_magic_wand_model_data[] = {
+#include "magic_wand_model_data.h"
+
+const unsigned char g_magic_wand_model_data[] = {
     0x20, 0x00, 0x00, 0x00, 0x54, 0x46, 0x4c, 0x33, 0x00, 0x00, 0x00, 0x00,
     0x14, 0x00, 0x20, 0x00, 0x04, 0x00, 0x08, 0x00, 0x0c, 0x00, 0x10, 0x00,
     0x14, 0x00, 0x00, 0x00, 0x18, 0x00, 0x1c, 0x00, 0x14, 0x00, 0x00, 0x00,
@@ -2585,4 +2587,5 @@ unsigned char g_magic_wand_model_data[] = {
     0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x80, 0x3f, 0x01, 0x00, 0x00, 0x00,
     0x80, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x04, 0x00, 0x04, 0x00,
     0x04, 0x00, 0x00, 0x00};
-unsigned int g_magic_wand_model_data_len = 30880;
+
+const int g_magic_wand_model_data_len = sizeof(g_magic_wand_model_data);

examples/magic_wand/magic_wand_model_data.h

@@ -21,4 +21,4 @@ limitations under the License.
 extern const unsigned char g_magic_wand_model_data[];
 extern const int g_magic_wand_model_data_len;
 
-#endif  // TENSORFLOW_LITE_MICRO_EXAMPLES_MAGIC_WAND_MAGIC_WAND_MODEL_DATA_H_
+#endif  // TENSORFLOW_LITE_MICRO_EXAMPLES_MAGIC_WAND_MAGIC_WAND_MODEL_DATA_H_