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TinyML HelloWorld
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/* USER CODE BEGIN Header */ | |
/** | |
****************************************************************************** | |
* @file : main.c | |
* @brief : Main program body | |
****************************************************************************** | |
* @attention | |
* | |
* <h2><center>© Copyright (c) 2021 STMicroelectronics. | |
* All rights reserved.</center></h2> | |
* | |
* This software component is licensed by ST under Ultimate Liberty license | |
* SLA0044, the "License"; You may not use this file except in compliance with | |
* the License. You may obtain a copy of the License at: | |
* www.st.com/SLA0044 | |
* | |
****************************************************************************** | |
*/ | |
/* USER CODE END Header */ | |
/* Includes ------------------------------------------------------------------*/ | |
#include "main.h" | |
/* Private includes ----------------------------------------------------------*/ | |
/* USER CODE BEGIN Includes */ | |
#include "tensorflow/lite/micro/all_ops_resolver.h" | |
#include "tensorflow/lite/micro/micro_error_reporter.h" | |
#include "tensorflow/lite/micro/micro_interpreter.h" | |
/* USER CODE END Includes */ | |
/* Private typedef -----------------------------------------------------------*/ | |
/* USER CODE BEGIN PTD */ | |
/* USER CODE END PTD */ | |
/* Private define ------------------------------------------------------------*/ | |
/* USER CODE BEGIN PD */ | |
#define TFLITE_SCHEMA_VERSION (3) | |
const int kInferencesPerCycle = 1000; | |
const float kXrange = 2.f * 3.14159265359f; | |
// 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; | |
TfLiteTensor* output = nullptr; | |
int inference_count = 0; | |
constexpr int kTensorArenaSize = 2000; | |
uint8_t tensor_arena[kTensorArenaSize]; | |
} | |
/* USER CODE END PD */ | |
/* Private macro -------------------------------------------------------------*/ | |
/* USER CODE BEGIN PM */ | |
/* USER CODE END PM */ | |
/* Private variables ---------------------------------------------------------*/ | |
/* USER CODE BEGIN PV */ | |
alignas(8) const unsigned char g_model[] = { | |
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0x34, 0x00, 0x00, 0x00, 0x2c, 0x00, 0x00, 0x00, 0x24, 0x00, 0x00, 0x00, | |
0x04, 0x00, 0x00, 0x00, 0xfa, 0xfd, 0xff, 0xff, 0x04, 0x00, 0x00, 0x00, | |
0x10, 0x00, 0x00, 0x00, 0x31, 0x2e, 0x35, 0x2e, 0x30, 0x00, 0x00, 0x00, | |
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x84, 0xfd, 0xff, 0xff, | |
0x88, 0xfd, 0xff, 0xff, 0x8c, 0xfd, 0xff, 0xff, 0x22, 0xfe, 0xff, 0xff, | |
0x04, 0x00, 0x00, 0x00, 0x10, 0x00, 0x00, 0x00, 0x21, 0xa5, 0x8b, 0xca, | |
0x5e, 0x1d, 0xce, 0x42, 0x9d, 0xce, 0x1f, 0xb0, 0xdf, 0x54, 0x2f, 0x81, | |
0x3e, 0xfe, 0xff, 0xff, 0x04, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, | |
0xee, 0xfc, 0x00, 0xec, 0x05, 0x17, 0xef, 0xec, 0xe6, 0xf8, 0x03, 0x01, | |
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0x24, 0x01, 0x00, 0x00, 0x98, 0x00, 0x00, 0x00, 0x04, 0x00, 0x00, 0x00, | |
0xf0, 0xfb, 0xff, 0xff, 0x18, 0x00, 0x00, 0x00, 0x20, 0x00, 0x00, 0x00, | |
0x54, 0x00, 0x00, 0x00, 0x0a, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x09, | |
0x6c, 0x00, 0x00, 0x00, 0x02, 0x00, 0x00, 0x00, 0xff, 0xff, 0xff, 0xff, | |
0x01, 0x00, 0x00, 0x00, 0xdc, 0xfb, 0xff, 0xff, 0x10, 0x00, 0x00, 0x00, | |
0x18, 0x00, 0x00, 0x00, 0x1c, 0x00, 0x00, 0x00, 0x20, 0x00, 0x00, 0x00, | |
0x01, 0x00, 0x00, 0x00, 0x04, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, | |
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0x34, 0x84, 0x85, 0x3f, 0x01, 0x00, 0x00, 0x00, 0xc5, 0x02, 0x8f, 0xbf, | |
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0x80, 0xfc, 0xff, 0xff, 0x18, 0x00, 0x00, 0x00, 0x20, 0x00, 0x00, 0x00, | |
0x54, 0x00, 0x00, 0x00, 0x09, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x09, | |
0x64, 0x00, 0x00, 0x00, 0x02, 0x00, 0x00, 0x00, 0xff, 0xff, 0xff, 0xff, | |
0x10, 0x00, 0x00, 0x00, 0x6c, 0xfc, 0xff, 0xff, 0x10, 0x00, 0x00, 0x00, | |
0x18, 0x00, 0x00, 0x00, 0x1c, 0x00, 0x00, 0x00, 0x20, 0x00, 0x00, 0x00, | |
0x01, 0x00, 0x00, 0x00, 0x80, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, | |
0x01, 0x00, 0x00, 0x00, 0x93, 0xd0, 0xc0, 0x3b, 0x01, 0x00, 0x00, 0x00, | |
0xc2, 0x0f, 0xc0, 0x3f, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, | |
0x14, 0x00, 0x00, 0x00, 0x74, 0x66, 0x6c, 0x2e, 0x66, 0x75, 0x6c, 0x6c, | |
0x79, 0x5f, 0x63, 0x6f, 0x6e, 0x6e, 0x65, 0x63, 0x74, 0x65, 0x64, 0x31, | |
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0x10, 0x00, 0x00, 0x00, 0x08, 0xfd, 0xff, 0xff, 0x18, 0x00, 0x00, 0x00, | |
0x20, 0x00, 0x00, 0x00, 0x58, 0x00, 0x00, 0x00, 0x08, 0x00, 0x00, 0x00, | |
0x00, 0x00, 0x00, 0x09, 0x64, 0x00, 0x00, 0x00, 0x02, 0x00, 0x00, 0x00, | |
0xff, 0xff, 0xff, 0xff, 0x10, 0x00, 0x00, 0x00, 0xf4, 0xfc, 0xff, 0xff, | |
0x10, 0x00, 0x00, 0x00, 0x1c, 0x00, 0x00, 0x00, 0x20, 0x00, 0x00, 0x00, | |
0x24, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x80, 0xff, 0xff, 0xff, | |
0xff, 0xff, 0xff, 0xff, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, | |
0xe0, 0xdb, 0x47, 0x3c, 0x01, 0x00, 0x00, 0x00, 0x04, 0x14, 0x47, 0x40, | |
0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x13, 0x00, 0x00, 0x00, | |
0x74, 0x66, 0x6c, 0x2e, 0x66, 0x75, 0x6c, 0x6c, 0x79, 0x5f, 0x63, 0x6f, | |
0x6e, 0x6e, 0x65, 0x63, 0x74, 0x65, 0x64, 0x00, 0x02, 0x00, 0x00, 0x00, | |
0x01, 0x00, 0x00, 0x00, 0x10, 0x00, 0x00, 0x00, 0x02, 0xfe, 0xff, 0xff, | |
0x14, 0x00, 0x00, 0x00, 0x48, 0x00, 0x00, 0x00, 0x07, 0x00, 0x00, 0x00, | |
0x00, 0x00, 0x00, 0x09, 0x50, 0x00, 0x00, 0x00, 0x6c, 0xfd, 0xff, 0xff, | |
0x10, 0x00, 0x00, 0x00, 0x18, 0x00, 0x00, 0x00, 0x1c, 0x00, 0x00, 0x00, | |
0x20, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, | |
0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0xfb, 0x4b, 0x0b, 0x3c, | |
0x01, 0x00, 0x00, 0x00, 0x40, 0x84, 0x4b, 0x3f, 0x01, 0x00, 0x00, 0x00, | |
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0x63, 0x6f, 0x6e, 0x73, 0x74, 0x61, 0x6e, 0x74, 0x32, 0x00, 0x00, 0x00, | |
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0x00, 0x00, 0x00, 0x02, 0x3c, 0x00, 0x00, 0x00, 0x44, 0xff, 0xff, 0xff, | |
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0x03, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0x38, 0x00, 0x00, 0x00, | |
0x9c, 0xff, 0xff, 0xff, 0x08, 0x00, 0x00, 0x00, 0x10, 0x00, 0x00, 0x00, | |
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0x01, 0x00, 0x00, 0x00, 0xdd, 0x9b, 0x21, 0x39, 0x0c, 0x00, 0x00, 0x00, | |
0x64, 0x65, 0x6e, 0x73, 0x65, 0x5f, 0x33, 0x2f, 0x62, 0x69, 0x61, 0x73, | |
0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x10, 0x00, 0x00, 0x00, | |
0x00, 0x00, 0x0e, 0x00, 0x18, 0x00, 0x14, 0x00, 0x13, 0x00, 0x0c, 0x00, | |
0x08, 0x00, 0x04, 0x00, 0x0e, 0x00, 0x00, 0x00, 0x20, 0x00, 0x00, 0x00, | |
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0x08, 0x00, 0x04, 0x00, 0x0c, 0x00, 0x00, 0x00, 0x08, 0x00, 0x00, 0x00, | |
0x14, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, | |
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0x65, 0x5f, 0x34, 0x2f, 0x62, 0x69, 0x61, 0x73, 0x00, 0x00, 0x00, 0x00, | |
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0xff, 0xff, 0xff, 0xff, 0x01, 0x00, 0x00, 0x00, 0x0c, 0x00, 0x14, 0x00, | |
0x10, 0x00, 0x0c, 0x00, 0x08, 0x00, 0x04, 0x00, 0x0c, 0x00, 0x00, 0x00, | |
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0xff, 0xff, 0xff, 0xff, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, | |
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0x01, 0x00, 0x00, 0x00, 0x03, 0x00, 0x00, 0x00, 0x40, 0x00, 0x00, 0x00, | |
0x24, 0x00, 0x00, 0x00, 0x04, 0x00, 0x00, 0x00, 0xd8, 0xff, 0xff, 0xff, | |
0x06, 0x00, 0x00, 0x00, 0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x06, | |
0x0c, 0x00, 0x0c, 0x00, 0x0b, 0x00, 0x00, 0x00, 0x00, 0x00, 0x04, 0x00, | |
0x0c, 0x00, 0x00, 0x00, 0x72, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x72, | |
0x0c, 0x00, 0x10, 0x00, 0x0f, 0x00, 0x00, 0x00, 0x08, 0x00, 0x04, 0x00, | |
0x0c, 0x00, 0x00, 0x00, 0x09, 0x00, 0x00, 0x00, 0x04, 0x00, 0x00, 0x00, | |
0x00, 0x00, 0x00, 0x09}; | |
const int g_model_len = 2488; | |
/* USER CODE END PV */ | |
/* Private function prototypes -----------------------------------------------*/ | |
void SystemClock_Config(void); | |
static void MX_CRC_Init(void); | |
/* USER CODE BEGIN PFP */ | |
/* USER CODE END PFP */ | |
/* Private user code ---------------------------------------------------------*/ | |
/* USER CODE BEGIN 0 */ | |
void DebugLog(const char* s){ | |
__nop(); | |
} | |
void HandleOutput(tflite::ErrorReporter* error_reporter, float x_value, | |
float y_value) { | |
// Log the current X and Y values | |
TF_LITE_REPORT_ERROR(error_reporter, "x_value: %f, y_value: %f\n", | |
static_cast<double>(x_value), | |
static_cast<double>(y_value)); | |
} | |
// The name of this function is important for Arduino compatibility. | |
void setup() { | |
// 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 = µ_error_reporter; | |
// Map the model into a usable data structure. This doesn't involve any | |
// copying or parsing, it's a very lightweight operation. | |
model = tflite::GetModel(g_model); | |
if (model->version() != TFLITE_SCHEMA_VERSION) { | |
TF_LITE_REPORT_ERROR(error_reporter, | |
"Model provided is schema version %d not equal " | |
"to supported version %d.", | |
model->version(), TFLITE_SCHEMA_VERSION); | |
return; | |
} | |
// This pulls in all the operation implementations we need. | |
// NOLINTNEXTLINE(runtime-global-variables) | |
static tflite::AllOpsResolver resolver; | |
// Build an interpreter to run the model with. | |
static tflite::MicroInterpreter static_interpreter( | |
model, resolver, tensor_arena, kTensorArenaSize, error_reporter); | |
interpreter = &static_interpreter; | |
// Allocate memory from the tensor_arena for the model's tensors. | |
TfLiteStatus allocate_status = interpreter->AllocateTensors(); | |
if (allocate_status != kTfLiteOk) { | |
TF_LITE_REPORT_ERROR(error_reporter, "AllocateTensors() failed"); | |
return; | |
} | |
// Obtain pointers to the model's input and output tensors. | |
input = interpreter->input(0); | |
output = interpreter->output(0); | |
// Keep track of how many inferences we have performed. | |
inference_count = 0; | |
} | |
// The name of this function is important for Arduino compatibility. | |
void loop() { | |
// Calculate an x value to feed into the model. We compare the current | |
// inference_count to the number of inferences per cycle to determine | |
// our position within the range of possible x values the model was | |
// trained on, and use this to calculate a value. | |
float position = static_cast<float>(inference_count) / | |
static_cast<float>(kInferencesPerCycle); | |
float x = position * kXrange; | |
// Quantize the input from floating-point to integer | |
int8_t x_quantized = x / input->params.scale + input->params.zero_point; | |
// Place the quantized input in the model's input tensor | |
input->data.int8[0] = x_quantized; | |
// Run inference, and report any error | |
TfLiteStatus invoke_status = interpreter->Invoke(); | |
if (invoke_status != kTfLiteOk) { | |
TF_LITE_REPORT_ERROR(error_reporter, "Invoke failed on x: %f\n", | |
static_cast<double>(x)); | |
return; | |
} | |
// Obtain the quantized output from model's output tensor | |
int8_t y_quantized = output->data.int8[0]; | |
// Dequantize the output from integer to floating-point | |
float y = (y_quantized - output->params.zero_point) * output->params.scale; | |
// Output the results. A custom HandleOutput function can be implemented | |
// for each supported hardware target. | |
HandleOutput(error_reporter, x, y); | |
// Increment the inference_counter, and reset it if we have reached | |
// the total number per cycle | |
inference_count += 1; | |
if (inference_count >= kInferencesPerCycle) inference_count = 0; | |
} | |
/* USER CODE END 0 */ | |
/** | |
* @brief The application entry point. | |
* @retval int | |
*/ | |
int main(void) | |
{ | |
/* USER CODE BEGIN 1 */ | |
/* USER CODE END 1 */ | |
/* Enable I-Cache---------------------------------------------------------*/ | |
SCB_EnableICache(); | |
/* Enable D-Cache---------------------------------------------------------*/ | |
SCB_EnableDCache(); | |
/* MCU Configuration--------------------------------------------------------*/ | |
/* Reset of all peripherals, Initializes the Flash interface and the Systick. */ | |
LL_APB4_GRP1_EnableClock(LL_APB4_GRP1_PERIPH_SYSCFG); | |
NVIC_SetPriorityGrouping(NVIC_PRIORITYGROUP_4); | |
/* System interrupt init*/ | |
/* USER CODE BEGIN Init */ | |
/* USER CODE END Init */ | |
/* Configure the system clock */ | |
SystemClock_Config(); | |
/* USER CODE BEGIN SysInit */ | |
/* USER CODE END SysInit */ | |
/* Initialize all configured peripherals */ | |
MX_CRC_Init(); | |
/* USER CODE BEGIN 2 */ | |
setup(); | |
/* USER CODE END 2 */ | |
/* Infinite loop */ | |
/* USER CODE BEGIN WHILE */ | |
while (1) | |
{ | |
/* USER CODE END WHILE */ | |
loop(); | |
/* USER CODE BEGIN 3 */ | |
} | |
/* USER CODE END 3 */ | |
} | |
/** | |
* @brief System Clock Configuration | |
* @retval None | |
*/ | |
void SystemClock_Config(void) | |
{ | |
LL_FLASH_SetLatency(LL_FLASH_LATENCY_3); | |
while(LL_FLASH_GetLatency()!= LL_FLASH_LATENCY_3) | |
{ | |
} | |
LL_PWR_ConfigSupply(LL_PWR_LDO_SUPPLY); | |
LL_PWR_SetRegulVoltageScaling(LL_PWR_REGU_VOLTAGE_SCALE0); | |
LL_RCC_HSI_Enable(); | |
/* Wait till HSI is ready */ | |
while(LL_RCC_HSI_IsReady() != 1) | |
{ | |
} | |
LL_RCC_HSI_SetCalibTrimming(32); | |
LL_RCC_HSI_SetDivider(LL_RCC_HSI_DIV1); | |
LL_RCC_PLL_SetSource(LL_RCC_PLLSOURCE_HSI); | |
LL_RCC_PLL1P_Enable(); | |
LL_RCC_PLL1_SetVCOInputRange(LL_RCC_PLLINPUTRANGE_8_16); | |
LL_RCC_PLL1_SetVCOOutputRange(LL_RCC_PLLVCORANGE_WIDE); | |
LL_RCC_PLL1_SetM(4); | |
LL_RCC_PLL1_SetN(34); | |
LL_RCC_PLL1_SetP(1); | |
LL_RCC_PLL1_SetQ(2); | |
LL_RCC_PLL1_SetR(2); | |
LL_RCC_PLL1_SetFRACN(3072); | |
LL_RCC_PLL1FRACN_Enable(); | |
LL_RCC_PLL1_Enable(); | |
/* Wait till PLL is ready */ | |
while(LL_RCC_PLL1_IsReady() != 1) | |
{ | |
} | |
/* Intermediate AHB prescaler 2 when target frequency clock is higher than 80 MHz */ | |
LL_RCC_SetAHBPrescaler(LL_RCC_AHB_DIV_2); | |
LL_RCC_SetSysClkSource(LL_RCC_SYS_CLKSOURCE_PLL1); | |
LL_RCC_SetSysPrescaler(LL_RCC_SYSCLK_DIV_1); | |
LL_RCC_SetAHBPrescaler(LL_RCC_AHB_DIV_2); | |
LL_RCC_SetAPB1Prescaler(LL_RCC_APB1_DIV_2); | |
LL_RCC_SetAPB2Prescaler(LL_RCC_APB2_DIV_2); | |
LL_RCC_SetAPB3Prescaler(LL_RCC_APB3_DIV_2); | |
LL_RCC_SetAPB4Prescaler(LL_RCC_APB4_DIV_2); | |
LL_Init1msTick(550000000); | |
LL_SetSystemCoreClock(550000000); | |
} | |
/** | |
* @brief CRC Initialization Function | |
* @param None | |
* @retval None | |
*/ | |
static void MX_CRC_Init(void) | |
{ | |
/* USER CODE BEGIN CRC_Init 0 */ | |
/* USER CODE END CRC_Init 0 */ | |
/* Peripheral clock enable */ | |
LL_AHB4_GRP1_EnableClock(LL_AHB4_GRP1_PERIPH_CRC); | |
/* USER CODE BEGIN CRC_Init 1 */ | |
/* USER CODE END CRC_Init 1 */ | |
LL_CRC_SetInputDataReverseMode(CRC, LL_CRC_INDATA_REVERSE_NONE); | |
LL_CRC_SetOutputDataReverseMode(CRC, LL_CRC_OUTDATA_REVERSE_NONE); | |
LL_CRC_SetPolynomialCoef(CRC, LL_CRC_DEFAULT_CRC32_POLY); | |
LL_CRC_SetPolynomialSize(CRC, LL_CRC_POLYLENGTH_32B); | |
LL_CRC_SetInitialData(CRC, LL_CRC_DEFAULT_CRC_INITVALUE); | |
/* USER CODE BEGIN CRC_Init 2 */ | |
/* USER CODE END CRC_Init 2 */ | |
} | |
/* USER CODE BEGIN 4 */ | |
/* USER CODE END 4 */ | |
/** | |
* @brief This function is executed in case of error occurrence. | |
* @retval None | |
*/ | |
void Error_Handler(void) | |
{ | |
/* USER CODE BEGIN Error_Handler_Debug */ | |
/* User can add his own implementation to report the HAL error return state */ | |
__disable_irq(); | |
while (1) | |
{ | |
} | |
/* USER CODE END Error_Handler_Debug */ | |
} | |
#ifdef USE_FULL_ASSERT | |
/** | |
* @brief Reports the name of the source file and the source line number | |
* where the assert_param error has occurred. | |
* @param file: pointer to the source file name | |
* @param line: assert_param error line source number | |
* @retval None | |
*/ | |
void assert_failed(uint8_t *file, uint32_t line) | |
{ | |
/* USER CODE BEGIN 6 */ | |
/* User can add his own implementation to report the file name and line number, | |
ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */ | |
/* USER CODE END 6 */ | |
} | |
#endif /* USE_FULL_ASSERT */ | |
/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/ |
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