/* USER CODE BEGIN Header */
/**
******************************************************************************
* @file : main.c
* @brief : Main program body
******************************************************************************
* @attention
*
* Copyright (c) 2025 STMicroelectronics.
* All rights reserved.
*
* This software is licensed under terms that can be found in the LICENSE file
* in the root directory of this software component.
* If no LICENSE file comes with this software, it is provided AS-IS.
*
******************************************************************************
*/
/* USER CODE END Header */
/* Includes ------------------------------------------------------------------*/
#include "main.h"
/* Private includes ----------------------------------------------------------*/
/* USER CODE BEGIN Includes */
/* USER CODE END Includes */
/* Private typedef -----------------------------------------------------------*/
/* USER CODE BEGIN PTD */
/* USER CODE END PTD */
/* Private define ------------------------------------------------------------*/
/* USER CODE BEGIN PD */
/* USER CODE END PD */
/* Private macro -------------------------------------------------------------*/
/* USER CODE BEGIN PM */
/* USER CODE END PM */
/* Private variables ---------------------------------------------------------*/
ADC_HandleTypeDef hadc1;
/* USER CODE BEGIN PV */
/* USER CODE END PV */
/* Private function prototypes -----------------------------------------------*/
void SystemClock_Config(void);
static void MX_GPIO_Init(void);
static void MX_ADC1_Init(void);
/* USER CODE BEGIN PFP */
/* USER CODE END PFP */
/* Private user code ---------------------------------------------------------*/
/* USER CODE BEGIN 0 */
#define LCD_RS_GPIO_Port GPIOB
#define LCD_RS_Pin GPIO_PIN_9
#define LCD_E_GPIO_Port GPIOB
#define LCD_E_Pin GPIO_PIN_8
#define LCD_D4_GPIO_Port GPIOA
#define LCD_D4_Pin GPIO_PIN_5
#define LCD_D5_GPIO_Port GPIOA
#define LCD_D5_Pin GPIO_PIN_6
#define LCD_D6_GPIO_Port GPIOA
#define LCD_D6_Pin GPIO_PIN_7
#define LCD_D7_GPIO_Port GPIOB
#define LCD_D7_Pin GPIO_PIN_2
void lcd_enable_pulse() {
HAL_GPIO_WritePin(LCD_E_GPIO_Port, LCD_E_Pin, GPIO_PIN_SET);
HAL_Delay(1);
HAL_GPIO_WritePin(LCD_E_GPIO_Port, LCD_E_Pin, GPIO_PIN_RESET);
HAL_Delay(1);
}
void lcd_send_nibble(uint8_t nibble) {
HAL_GPIO_WritePin(LCD_D4_GPIO_Port, LCD_D4_Pin, (nibble >> 0) & 0x01);
HAL_GPIO_WritePin(LCD_D5_GPIO_Port, LCD_D5_Pin, (nibble >> 1) & 0x01);
HAL_GPIO_WritePin(LCD_D6_GPIO_Port, LCD_D6_Pin, (nibble >> 2) & 0x01);
HAL_GPIO_WritePin(LCD_D7_GPIO_Port, LCD_D7_Pin, (nibble >> 3) & 0x01);
lcd_enable_pulse();
}
void lcd_send_byte(uint8_t byte, uint8_t rs) {
HAL_GPIO_WritePin(LCD_RS_GPIO_Port, LCD_RS_Pin, rs);
lcd_send_nibble(byte >> 4);
lcd_send_nibble(byte & 0x0F);
HAL_Delay(2);
}
void lcd_send_command(uint8_t cmd) {
lcd_send_byte(cmd, 0);
}
void lcd_send_data(uint8_t data) {
lcd_send_byte(data, 1);
}
void lcd_init() {
HAL_Delay(50);
lcd_send_nibble(0x03); HAL_Delay(5);
lcd_send_nibble(0x03); HAL_Delay(1);
lcd_send_nibble(0x03); HAL_Delay(1);
lcd_send_nibble(0x02);
lcd_send_command(0x28);
lcd_send_command(0x0C);
lcd_send_command(0x06);
lcd_send_command(0x01);
HAL_Delay(2);
}
void lcd_set_cursor(uint8_t row, uint8_t col) {
uint8_t address = (row == 0) ? 0x00 : 0x40;
lcd_send_command(0x80 | (address + col));
}
void lcd_print(char* str) {
while (*str) {
lcd_send_data((uint8_t)(*str));
str++;
}
}
void delay_us(uint32_t us) {
uint32_t start_tick = HAL_GetTick();
while ((HAL_GetTick() - start_tick) < (us / 1000)) {
}
}
void delay_ms(uint32_t ms) {
HAL_Delay(ms);
}
void delay_s(uint8_t s) {
for (uint8_t i = 0; i < s; i++) {
delay_ms(1000);
}
}
/* USER CODE END 0 */
/**
* @brief The application entry point.
* @retval int
*/
int main(void)
{
/* USER CODE BEGIN 1 */
/* USER CODE END 1 */
/* MCU Configuration--------------------------------------------------------*/
/* Reset of all peripherals, Initializes the Flash interface and the Systick. */
HAL_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_GPIO_Init();
MX_ADC1_Init();
/* USER CODE BEGIN 2 */
/* USER CODE END 2 */
/* Infinite loop */
/* USER CODE BEGIN WHILE */
uint8_t segundos = 0;
char buffer[16];
lcd_init();
while (1)
{
/* USER CODE END WHILE */
/* USER CODE BEGIN 3 */
char buffer[16];
// Delay de microsegundos
lcd_set_cursor(0, 0);
lcd_print("Delay em us");
lcd_set_cursor(1, 0);
snprintf(buffer, sizeof(buffer), "Aguarde 500 us");
lcd_print(" "); // limpa linha
lcd_set_cursor(1, 0);
lcd_print(buffer);
delay_us(500); // meio milissegundo
// Delay de milissegundos
lcd_set_cursor(0, 0);
lcd_print("Delay em ms");
lcd_set_cursor(1, 0);
snprintf(buffer, sizeof(buffer), "Aguarde 200 ms");
lcd_print(" ");
lcd_set_cursor(1, 0);
lcd_print(buffer);
delay_ms(200);
// Delay de segundos
lcd_set_cursor(0, 0);
lcd_print("Delay em seg");
lcd_set_cursor(1, 0);
snprintf(buffer, sizeof(buffer), "Aguarde 2 seg");
lcd_print(" ");
lcd_set_cursor(1, 0);
lcd_print(buffer);
delay_s(2);
}
/* USER CODE END 3 */
}
/**
* @brief System Clock Configuration
* @retval None
*/
void SystemClock_Config(void)
{
RCC_OscInitTypeDef RCC_OscInitStruct = {0};
RCC_ClkInitTypeDef RCC_ClkInitStruct = {0};
__HAL_FLASH_SET_LATENCY(FLASH_LATENCY_1);
/** Initializes the RCC Oscillators according to the specified parameters
* in the RCC_OscInitTypeDef structure.
*/
RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSI;
RCC_OscInitStruct.HSIState = RCC_HSI_ON;
RCC_OscInitStruct.HSIDiv = RCC_HSI_DIV1;
RCC_OscInitStruct.HSICalibrationValue = RCC_HSICALIBRATION_DEFAULT;
if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
{
Error_Handler();
}
/** Initializes the CPU, AHB and APB buses clocks
*/
RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK|RCC_CLOCKTYPE_SYSCLK
|RCC_CLOCKTYPE_PCLK1;
RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_HSI;
RCC_ClkInitStruct.SYSCLKDivider = RCC_SYSCLK_DIV1;
RCC_ClkInitStruct.AHBCLKDivider = RCC_HCLK_DIV1;
RCC_ClkInitStruct.APB1CLKDivider = RCC_APB1_DIV1;
if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_1) != HAL_OK)
{
Error_Handler();
}
}
/**
* @brief ADC1 Initialization Function
* @param None
* @retval None
*/
static void MX_ADC1_Init(void)
{
/* USER CODE BEGIN ADC1_Init 0 */
/* USER CODE END ADC1_Init 0 */
ADC_ChannelConfTypeDef sConfig = {0};
/* USER CODE BEGIN ADC1_Init 1 */
/* USER CODE END ADC1_Init 1 */
/** Configure the global features of the ADC (Clock, Resolution, Data Alignment and number of conversion)
*/
hadc1.Instance = ADC1;
hadc1.Init.ClockPrescaler = ADC_CLOCK_SYNC_PCLK_DIV2;
hadc1.Init.Resolution = ADC_RESOLUTION_12B;
hadc1.Init.DataAlign = ADC_DATAALIGN_RIGHT;
hadc1.Init.ScanConvMode = ADC_SCAN_SEQ_FIXED;
hadc1.Init.EOCSelection = ADC_EOC_SINGLE_CONV;
hadc1.Init.LowPowerAutoWait = DISABLE;
hadc1.Init.LowPowerAutoPowerOff = DISABLE;
hadc1.Init.ContinuousConvMode = DISABLE;
hadc1.Init.NbrOfConversion = 1;
hadc1.Init.DiscontinuousConvMode = DISABLE;
hadc1.Init.ExternalTrigConv = ADC_SOFTWARE_START;
hadc1.Init.ExternalTrigConvEdge = ADC_EXTERNALTRIGCONVEDGE_NONE;
hadc1.Init.DMAContinuousRequests = DISABLE;
hadc1.Init.Overrun = ADC_OVR_DATA_PRESERVED;
hadc1.Init.SamplingTimeCommon1 = ADC_SAMPLETIME_1CYCLE_5;
hadc1.Init.OversamplingMode = DISABLE;
hadc1.Init.TriggerFrequencyMode = ADC_TRIGGER_FREQ_HIGH;
if (HAL_ADC_Init(&hadc1) != HAL_OK)
{
Error_Handler();
}
/** Configure Regular Channel
*/
sConfig.Channel = ADC_CHANNEL_0;
sConfig.Rank = ADC_RANK_CHANNEL_NUMBER;
if (HAL_ADC_ConfigChannel(&hadc1, &sConfig) != HAL_OK)
{
Error_Handler();
}
/* USER CODE BEGIN ADC1_Init 2 */
/* USER CODE END ADC1_Init 2 */
}
/**
* @brief GPIO Initialization Function
* @param None
* @retval None
*/
static void MX_GPIO_Init(void)
{
GPIO_InitTypeDef GPIO_InitStruct = {0};
/* USER CODE BEGIN MX_GPIO_Init_1 */
/* USER CODE END MX_GPIO_Init_1 */
/* GPIO Ports Clock Enable */
__HAL_RCC_GPIOA_CLK_ENABLE();
__HAL_RCC_GPIOB_CLK_ENABLE();
/*Configure GPIO pin Output Level */
HAL_GPIO_WritePin(GPIOA, GPIO_PIN_5|GPIO_PIN_6|GPIO_PIN_7, GPIO_PIN_RESET);
/*Configure GPIO pin Output Level */
HAL_GPIO_WritePin(GPIOB, GPIO_PIN_2|GPIO_PIN_8|GPIO_PIN_9, GPIO_PIN_RESET);
/*Configure GPIO pins : PA5 PA6 PA7 */
GPIO_InitStruct.Pin = GPIO_PIN_5|GPIO_PIN_6|GPIO_PIN_7;
GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
GPIO_InitStruct.Pull = GPIO_NOPULL;
GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
/*Configure GPIO pins : PB2 PB8 PB9 */
GPIO_InitStruct.Pin = GPIO_PIN_2|GPIO_PIN_8|GPIO_PIN_9;
GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
GPIO_InitStruct.Pull = GPIO_NOPULL;
GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);
/* USER CODE BEGIN MX_GPIO_Init_2 */
/* USER CODE END MX_GPIO_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 */