🤖 Adds tensorflow lite micro lib

esp32/lib/tfmicro/tensorflow/lite/micro/micro_profiler.cc

@@ -0,0 +1,42 @@
+/* Copyright 2020 The TensorFlow Authors. All Rights Reserved.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+==============================================================================*/
+
+#include "tensorflow/lite/micro/micro_profiler.h"
+
+#include "tensorflow/lite/kernels/internal/compatibility.h"
+#include "tensorflow/lite/micro/micro_time.h"
+
+namespace tflite {
+
+MicroProfiler::MicroProfiler(tflite::ErrorReporter* reporter)
+    : reporter_(reporter) {}
+
+uint32_t MicroProfiler::BeginEvent(const char* tag, EventType event_type,
+                                   int64_t event_metadata1,
+                                   int64_t event_metadata2) {
+  start_time_ = GetCurrentTimeTicks();
+  TFLITE_DCHECK(tag != nullptr);
+  event_tag_ = tag;
+  return 0;
+}
+
+void MicroProfiler::EndEvent(uint32_t event_handle) {
+#ifndef TF_LITE_STRIP_ERROR_STRINGS
+  int32_t end_time = GetCurrentTimeTicks();
+  TF_LITE_REPORT_ERROR(reporter_, "%s took %d cycles\n", event_tag_,
+                       end_time - start_time_);
+#endif
+}
+}  // namespace tflite