disco_f746ng LCD support for TensorFlow Lite Micro micro_speech example

PiperOrigin-RevId: 262975460

tensorflow/lite/experimental/micro/examples/micro_speech/disco_f746ng/Makefile.inc

@@ -3,5 +3,6 @@ ifneq ($(filter disco_f746ng,$(ALL_TAGS)),)
   MBED_PROJECT_FILES += \
     AUDIO_DISCO_F746NG.lib \
     BSP_DISCO_F746NG.lib \
-    SDRAM_DISCO_F746NG.lib
+    SDRAM_DISCO_F746NG.lib \
+    LCD_DISCO_F746NG.lib
 endif

tensorflow/lite/experimental/micro/examples/micro_speech/disco_f746ng/command_responder.cc

+/* Copyright 2018 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/experimental/micro/examples/micro_speech/command_responder.h"
+
+#include "LCD_DISCO_F746NG.h"
+
+LCD_DISCO_F746NG lcd;
+
+// When a command is detected, write it to the display and log it to the
+// serial port.
+void RespondToCommand(tflite::ErrorReporter *error_reporter,
+                      int32_t current_time, const char *found_command,
+                      uint8_t score, bool is_new_command) {
+  if (is_new_command) {
+    error_reporter->Report("Heard %s (%d) @%dms", found_command, score,
+                           current_time);
+    if (*found_command == 'y') {
+      lcd.Clear(0xFF0F9D58);
+      lcd.DisplayStringAt(0, LINE(5), (uint8_t *)"Heard yes!", CENTER_MODE);
+    } else if (*found_command == 'n') {
+      lcd.Clear(0xFFDB4437);
+      lcd.DisplayStringAt(0, LINE(5), (uint8_t *)"Heard no :(", CENTER_MODE);
+    } else if (*found_command == 'u') {
+      lcd.Clear(0xFFF4B400);
+      lcd.DisplayStringAt(0, LINE(5), (uint8_t *)"Heard unknown", CENTER_MODE);
+    } else {
+      lcd.Clear(0xFF4285F4);
+      lcd.DisplayStringAt(0, LINE(5), (uint8_t *)"Heard silence", CENTER_MODE);
+    }
+  }
+}