#include "stm32c0xx_hal.h"
// --- DEFINISI PIN ---
#define BUTTON_REVERSE_Pin GPIO_PIN_0
#define BUTTON_REVERSE_GPIO_Port GPIOA
#define IR_SENSOR_Pin GPIO_PIN_1
#define IR_SENSOR_GPIO_Port GPIOA
#define LED_GREEN_Pin GPIO_PIN_0
#define LED_GREEN_GPIO_Port GPIOB
#define LED_RED_Pin GPIO_PIN_1
#define LED_RED_GPIO_Port GPIOB
#define BUZZER_Pin GPIO_PIN_2
#define BUZZER_GPIO_Port GPIOB
void SystemClock_Config(void);
static void MX_GPIO_Init(void);
// --- PROGRAM UTAMA ---
int main(void)
{
HAL_Init();
SystemClock_Config();
MX_GPIO_Init();
while (1)
{
// Cek switch (ON = HIGH)
if (HAL_GPIO_ReadPin(GPIOA, BUTTON_REVERSE_Pin) == GPIO_PIN_SET)
{
// Cek IR (LOW = deteksi)
if (HAL_GPIO_ReadPin(GPIOA, IR_SENSOR_Pin) == GPIO_PIN_RESET)
{
// ✅ KONDISI UTAMA (SOAL)
HAL_GPIO_WritePin(GPIOB, LED_GREEN_Pin, GPIO_PIN_SET); // Hijau nyala
HAL_GPIO_WritePin(GPIOB, LED_RED_Pin, GPIO_PIN_RESET); // Merah mati
HAL_GPIO_WritePin(GPIOB, BUZZER_Pin, GPIO_PIN_SET); // (opsional)
}
else
{
// Tidak deteksi
HAL_GPIO_WritePin(GPIOB, LED_GREEN_Pin, GPIO_PIN_RESET);
HAL_GPIO_WritePin(GPIOB, LED_RED_Pin, GPIO_PIN_SET);
HAL_GPIO_WritePin(GPIOB, BUZZER_Pin, GPIO_PIN_RESET);
}
}
else
{
// Switch OFF
HAL_GPIO_WritePin(GPIOB, LED_GREEN_Pin | LED_RED_Pin | BUZZER_Pin, GPIO_PIN_RESET);
}
HAL_Delay(50);
}
}
// --- CLOCK ---
void SystemClock_Config(void)
{
RCC_OscInitTypeDef RCC_OscInitStruct = {0};
RCC_ClkInitTypeDef RCC_ClkInitStruct = {0};
RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSI;
RCC_OscInitStruct.HSIState = RCC_HSI_ON;
RCC_OscInitStruct.HSICalibrationValue = RCC_HSICALIBRATION_DEFAULT;
if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
{
Error_Handler();
}
RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK | RCC_CLOCKTYPE_SYSCLK | RCC_CLOCKTYPE_PCLK1;
RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_HSI;
RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV1;
if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_0) != HAL_OK)
{
Error_Handler();
}
}
// --- GPIO ---
static void MX_GPIO_Init(void)
{
GPIO_InitTypeDef GPIO_InitStruct = {0};
__HAL_RCC_GPIOA_CLK_ENABLE();
__HAL_RCC_GPIOB_CLK_ENABLE();
// INPUT (tanpa pull biar ikut rangkaian kamu)
GPIO_InitStruct.Pin = BUTTON_REVERSE_Pin | IR_SENSOR_Pin;
GPIO_InitStruct.Mode = GPIO_MODE_INPUT;
GPIO_InitStruct.Pull = GPIO_NOPULL;
HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
// OUTPUT
GPIO_InitStruct.Pin = LED_GREEN_Pin | LED_RED_Pin | BUZZER_Pin;
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);
HAL_GPIO_WritePin(GPIOB, LED_GREEN_Pin | LED_RED_Pin | BUZZER_Pin, GPIO_PIN_RESET);
}