#include "main.h"
// HANDLE
ADC_HandleTypeDef hadc1;
TIM_HandleTypeDef htim3;
// VARIABLE
volatile uint8_t emergency_mode = 0;
uint32_t last_motion_time = 0;
// fallback tombol
uint8_t last_button_state = 1;
// PARAMETER
#define LDR_THRESHOLD 2000
#define MOTION_TIMEOUT 5000
#define LED_OFF 0
#define LED_DIM 100
#define LED_FULL 1000
// ================= 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;
HAL_RCC_OscConfig(&RCC_OscInitStruct);
RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK |
RCC_CLOCKTYPE_SYSCLK;
RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_HSI;
RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_0);
}
// ================= GPIO =================
void MX_GPIO_Init(void)
{
__HAL_RCC_GPIOA_CLK_ENABLE();
__HAL_RCC_GPIOB_CLK_ENABLE();
GPIO_InitTypeDef GPIO_InitStruct = {0};
// PIR → PA1
GPIO_InitStruct.Pin = GPIO_PIN_1;
GPIO_InitStruct.Mode = GPIO_MODE_INPUT;
GPIO_InitStruct.Pull = GPIO_NOPULL;
HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
// BUTTON → PB1 (PULL-UP + INTERRUPT)
GPIO_InitStruct.Pin = GPIO_PIN_1;
GPIO_InitStruct.Mode = GPIO_MODE_IT_FALLING;
GPIO_InitStruct.Pull = GPIO_PULLUP;
HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);
// LED PWM → PA6
GPIO_InitStruct.Pin = GPIO_PIN_6;
GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
GPIO_InitStruct.Pull = GPIO_NOPULL;
GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
GPIO_InitStruct.Alternate = GPIO_AF1_TIM3;
HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
// IRQ untuk PB1 (EXTI0_1)
HAL_NVIC_SetPriority(EXTI0_1_IRQn, 0, 0);
HAL_NVIC_EnableIRQ(EXTI0_1_IRQn);
}
// ================= ADC =================
void MX_ADC1_Init(void)
{
__HAL_RCC_ADC_CLK_ENABLE();
hadc1.Instance = ADC1;
hadc1.Init.Resolution = ADC_RESOLUTION_12B;
hadc1.Init.DataAlign = ADC_DATAALIGN_RIGHT;
hadc1.Init.ScanConvMode = ADC_SCAN_DISABLE;
hadc1.Init.ContinuousConvMode = DISABLE;
HAL_ADC_Init(&hadc1);
ADC_ChannelConfTypeDef sConfig = {0};
sConfig.Channel = ADC_CHANNEL_0;
sConfig.Rank = ADC_REGULAR_RANK_1;
HAL_ADC_ConfigChannel(&hadc1, &sConfig);
}
// ================= PWM =================
void MX_TIM3_Init(void)
{
__HAL_RCC_TIM3_CLK_ENABLE();
htim3.Instance = TIM3;
htim3.Init.Prescaler = 64;
htim3.Init.Period = 1000;
htim3.Init.CounterMode = TIM_COUNTERMODE_UP;
HAL_TIM_PWM_Init(&htim3);
TIM_OC_InitTypeDef sConfigOC = {0};
sConfigOC.OCMode = TIM_OCMODE_PWM1;
sConfigOC.Pulse = 0;
HAL_TIM_PWM_ConfigChannel(&htim3, &sConfigOC, TIM_CHANNEL_1);
}
// ================= INTERRUPT =================
void HAL_GPIO_EXTI_Callback(uint16_t GPIO_Pin)
{
if (GPIO_Pin == GPIO_PIN_1)
{
emergency_mode = !emergency_mode;
}
}
// ================= HELPER =================
uint16_t read_LDR(void)
{
HAL_ADC_Start(&hadc1);
HAL_ADC_PollForConversion(&hadc1, HAL_MAX_DELAY);
return HAL_ADC_GetValue(&hadc1);
}
void set_LED(uint16_t value)
{
__HAL_TIM_SET_COMPARE(&htim3, TIM_CHANNEL_1, value);
}
// ================= MAIN =================
int main(void)
{
HAL_Init();
SystemClock_Config();
MX_GPIO_Init();
MX_ADC1_Init();
MX_TIM3_Init();
HAL_TIM_PWM_Start(&htim3, TIM_CHANNEL_1);
while (1)
{
// ===== FALLBACK BUTTON =====
uint8_t current_button = HAL_GPIO_ReadPin(GPIOB, GPIO_PIN_1);
if (last_button_state == 1 && current_button == 0)
{
emergency_mode = !emergency_mode;
HAL_Delay(50);
}
last_button_state = current_button;
// ===== MODE DARURAT =====
if (emergency_mode)
{
set_LED(LED_OFF);
continue;
}
uint16_t ldr = read_LDR();
uint8_t pir = HAL_GPIO_ReadPin(GPIOA, GPIO_PIN_1);
// SIANG
if (ldr < LDR_THRESHOLD)
{
set_LED(LED_OFF);
}
else
{
// MALAM
if (pir == GPIO_PIN_SET)
{
last_motion_time = HAL_GetTick();
}
if (HAL_GetTick() - last_motion_time < MOTION_TIMEOUT)
{
set_LED(LED_FULL);
}
else
{
set_LED(LED_DIM);
}
}
HAL_Delay(100);
}
}
