pkg/tflite-micro: Update tflite-micro to latest version

pkg/tflite-micro/Makefile

@@ -1,7 +1,7 @@
 PKG_NAME=tflite-micro
 PKG_URL=https://github.com/tensorflow/tflite-micro
-# sync from 2022.04.07
-PKG_VERSION=1501b574b74fd7877aba30aa9d8b667f41b139c3
+# sync from 2024.05.21
+PKG_VERSION=8e22946b3faa51564df5dd9194f7540b2694892c
 PKG_LICENSE=Apache 2.0
 
 include $(RIOTBASE)/pkg/pkg.mk
@@ -14,23 +14,29 @@ CFLAGS += -Wno-unused-parameter
 TFLITE_MODULES := \
     tflite-c \
     tflite-core-api \
+    tflite-core-c \
     tflite-kernels \
     tflite-kernels-internal \
     tflite-kernels-internal-reference \
     tflite-micro \
+    tflite-micro-arena_allocator \
     tflite-micro-kernels \
     tflite-micro-memory-planner \
+    tflite-micro-tflite_bridge \
     tflite-schema \
     #
 
 DIR_tflite-c                            := tensorflow/lite/c
 DIR_tflite-core-api                     := tensorflow/lite/core/api
+DIR_tflite-core-c                       := tensorflow/lite/core/c
 DIR_tflite-kernels                      := tensorflow/lite/kernels
 DIR_tflite-kernels-internal             := tensorflow/lite/kernels/internal
 DIR_tflite-kernels-internal-reference   := tensorflow/lite/kernels/internal/reference
 DIR_tflite-micro                        := tensorflow/lite/micro
+DIR_tflite-micro-arena_allocator        := tensorflow/lite/micro/arena_allocator
 DIR_tflite-micro-kernels                := tensorflow/lite/micro/kernels
 DIR_tflite-micro-memory-planner         := tensorflow/lite/micro/memory_planner
+DIR_tflite-micro-tflite_bridge          := tensorflow/lite/micro/tflite_bridge
 DIR_tflite-schema                       := tensorflow/lite/schema
 
 TFLITE_MODULES_USED := $(filter $(TFLITE_MODULES),$(USEMODULE))
@@ -40,5 +46,13 @@ all: $(TFLITE_MODULES_USED)
 
 .PHONY: tflite-%
 
-tflite-%:
+# .PHONY: $(PKG_SOURCE_DIR)/tensorflow/lite/schema/schema_generated.h
+
+$(PKG_SOURCE_DIR)/tensorflow/lite/schema/schema_generated.h: $(PKG_SOURCE_DIR)/tensorflow/lite/schema/schema.fbs $(FLATC)
+	$(FLATC) --cpp -o "$(dir $@)" "$<"
+
+tflite-%: $(PKG_SOURCE_DIR)/tensorflow/lite/schema/schema_generated.h
 	$(QQ)"$(MAKE)" -C $(PKG_SOURCE_DIR)/$(DIR_$@) -f $(CURDIR)/$@.mk
+
+$(FLATC):
+	$(Q)make -C "$(dir $@)"

pkg/tflite-micro/Makefile.dep

@@ -6,12 +6,15 @@ USEPKG += ruy
 
 USEMODULE += tflite-c
 USEMODULE += tflite-core-api
+USEMODULE += tflite-core-c
 USEMODULE += tflite-kernels
 USEMODULE += tflite-kernels-internal
 USEMODULE += tflite-kernels-internal-reference
 USEMODULE += tflite-micro
+USEMODULE += tflite-micro-arena_allocator
 USEMODULE += tflite-micro-kernels
 USEMODULE += tflite-micro-memory-planner
+USEMODULE += tflite-micro-tflite_bridge
 USEMODULE += tflite-schema
 
 # This package doesn't work on riscv

pkg/tflite-micro/tflite-core-c.mk

@@ -0,0 +1,5 @@
+MODULE = tflite-core-c
+
+SRCXXEXT = cc
+
+include $(RIOTBASE)/Makefile.base

pkg/tflite-micro/tflite-micro-arena_allocator.mk

@@ -0,0 +1,6 @@
+MODULE = tflite-micro-arena_allocator
+
+SRCXXEXT = cc
+SRCXXEXCLUDE = $(wildcard *_test.$(SRCXXEXT))
+
+include $(RIOTBASE)/Makefile.base

pkg/tflite-micro/tflite-micro-tflite_bridge.mk

@@ -0,0 +1,5 @@
+MODULE = tflite-micro-tflite_bridge
+
+SRCXXEXT = cc
+
+include $(RIOTBASE)/Makefile.base

tests/pkg/tflite-micro/external_modules/mnist/main_functions.cc

@@ -17,17 +17,11 @@
 
 #include <stdio.h>
 #include "kernel_defines.h"
-#if IS_USED(MODULE_TENSORFLOW_LITE)
-#include "tensorflow/lite/micro/kernels/all_ops_resolver.h"
-#include "tensorflow/lite/micro/micro_error_reporter.h"
-#include "tensorflow/lite/micro/micro_interpreter.h"
-#include "tensorflow/lite/version.h"
-#else
-#include "tensorflow/lite/micro/all_ops_resolver.h"
-#include "tensorflow/lite/micro/micro_error_reporter.h"
+
+#include "tensorflow/lite/micro/micro_mutable_op_resolver.h"
 #include "tensorflow/lite/micro/micro_interpreter.h"
 #include "tensorflow/lite/micro/system_setup.h"
-#endif
+
 #include "tensorflow/lite/schema/schema_generated.h"
 
 #include "blob/digit.h"
@@ -37,7 +31,6 @@
 
 // Globals, used for compatibility with Arduino-style sketches.
 namespace {
-    tflite::ErrorReporter* error_reporter = nullptr;
     const tflite::Model* model = nullptr;
     tflite::MicroInterpreter* interpreter = nullptr;
     TfLiteTensor* input = nullptr;
@@ -52,15 +45,6 @@ namespace {
 // The name of this function is important for Arduino compatibility.
 void setup()
 {
-#if IS_USED(MODULE_TFLITE_MICRO)
-    tflite::InitializeTarget();
-#endif
-
-    // Set up logging. Google style is to avoid globals or statics because of
-    // lifetime uncertainty, but since this has a trivial destructor it's okay.
-    // NOLINTNEXTLINE(runtime-global-variables)
-    static tflite::MicroErrorReporter micro_error_reporter;
-    error_reporter = &micro_error_reporter;
 
     // Map the model into a usable data structure. This doesn't involve any
     // copying or parsing, it's a very lightweight operation.
@@ -74,16 +58,23 @@ void setup()
     }
 
     // This pulls in all the operation implementations we need.
-    // NOLINTNEXTLINE(runtime-global-variables)
-#if IS_USED(MODULE_TFLITE_MICRO)
-    static tflite::AllOpsResolver resolver;
-#else
-    static tflite::ops::micro::AllOpsResolver resolver;
-#endif
+    static tflite::MicroMutableOpResolver<4> resolver;
+    if (resolver.AddFullyConnected() != kTfLiteOk) {
+        return;
+    }
+    if (resolver.AddQuantize() != kTfLiteOk) {
+        return;
+    }
+    if (resolver.AddDequantize() != kTfLiteOk) {
+        return;
+    }
+    if (resolver.AddSoftmax() != kTfLiteOk) {
+        return;
+    }
 
     // Build an interpreter to run the model with.
     static tflite::MicroInterpreter static_interpreter(
-        model, resolver, tensor_arena, kTensorArenaSize, error_reporter);
+        model, resolver, tensor_arena, kTensorArenaSize);
     interpreter = &static_interpreter;
 
     // Allocate memory from the tensor_arena for the model's tensors.