Laporan Akhir 2
Laporan Akhir M2 Percobaan 4
a. Prosedur [Kembali]
- Buka web WOKWI.COM dan cari STM 32 NUCLEO C031C6
- Rangkai komponen sesuai dengan gambar rangkaian di modul
- Klik pada Library Manager untuk membuat file baru yang bernama main.h dan main.c
- Masukan program yang telah di buat sesuai kondisi pada kedua file tersebut
- Simulasikan
b. Hardware dan Diagram Blok [Kembali]
- Hardware
1. STM32 NUCLEO-G474RE
2. PIR Sensor
3. LDR Sensor
4. Driver Motor L298
5. Resistor 1k ohm
6. LED
7. Push Button
- Diagram Blog
c. Rangkaian Simulasi dan Prinsip Kerja [Kembali]
Rangkaian ini beroperasi sebagai sistem lampu otomatis cerdas yang mengutamakan efisiensi energi dengan menggabungkan sensor cahaya (LDR), sensor gerak (PIR), dan sakelar pengaman manual. Secara urutan logika, mikrokontroler pertama-tama mengecek status tombol (PB1); jika ditekan, sistem masuk ke mode darurat yang memaksa lampu mati total dan mengabaikan semua pembacaan sensor. Pada kondisi normal, sistem mengecek sensor LDR (PA0) terlebih dahulu; jika lingkungan terdeteksi siang/terang (nilai ADC < 2000), lampu dipastikan mati terlepas dari ada tidaknya orang. Namun, jika lingkungan terdeteksi malam/gelap (nilai ADC ≥ 2000), mikrokontroler baru mulai memantau sensor PIR (PA1), di mana lampu LED (PA6) hanya akan menyala penuh jika mendeteksi adanya gerakan manusia, dan mikrokontroler akan menunda pemadaman selama 5 detik sejak gerakan terakhir sebelum akhirnya mematikan lampu secara otomatis.
d. Flowchart dan Listing Program [Kembali]
- Flowchart
- Listing Program
- main.h
#ifndef __MAIN_H
#define __MAIN_H
#include "stm32c0xx_hal.h"
/* ================= PIN DEFINITIONS ================= */
/* LDR (ADC) */
#define LDR_PORT GPIOA
#define LDR_PIN GPIO_PIN_0 // PA0
/* PIR SENSOR */
#define PIR_PORT GPIOA
#define PIR_PIN GPIO_PIN_1 // PA1
/* PUSH BUTTON (INTERRUPT) */
#define BUTTON_PORT GPIOB
#define BUTTON_PIN GPIO_PIN_1 // PB1
/* LED PWM (TIM3 CH1) */
#define LED_PORT GPIOA
#define LED_PIN GPIO_PIN_6 // PA6
/* ================= FUNCTION PROTOTYPES ================= */
void SystemClock_Config(void);
void MX_GPIO_Init(void);
void MX_ADC1_Init(void);
void MX_TIM3_Init(void);
#endif
2. main.c
#include "main.h"
/* ================= HANDLE ================= */
ADC_HandleTypeDef hadc1;
TIM_HandleTypeDef htim3;
/* ================= VARIABLE ================= */
volatile uint8_t emergency_mode = 0;
uint32_t last_motion_time = 0;
/* fallback button */
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
/* ===================================================== */
/* ================= SYSTEM 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 INIT ========================== */
/* ===================================================== */
void MX_GPIO_Init(void)
{
__HAL_RCC_GPIOA_CLK_ENABLE();
__HAL_RCC_GPIOB_CLK_ENABLE();
GPIO_InitTypeDef GPIO_InitStruct = {0};
/* ===== PIR (INPUT) ===== */
GPIO_InitStruct.Pin = PIR_PIN;
GPIO_InitStruct.Mode = GPIO_MODE_INPUT;
GPIO_InitStruct.Pull = GPIO_NOPULL;
HAL_GPIO_Init(PIR_PORT, &GPIO_InitStruct);
/* ===== BUTTON (INTERRUPT FALLING) ===== */
GPIO_InitStruct.Pin = BUTTON_PIN;
GPIO_InitStruct.Mode = GPIO_MODE_IT_FALLING;
GPIO_InitStruct.Pull = GPIO_PULLUP;
HAL_GPIO_Init(BUTTON_PORT, &GPIO_InitStruct);
/* ===== LED PWM (AF) ===== */
GPIO_InitStruct.Pin = LED_PIN;
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(LED_PORT, &GPIO_InitStruct);
/* ===== INTERRUPT ENABLE ===== */
HAL_NVIC_SetPriority(EXTI0_1_IRQn, 0, 0);
HAL_NVIC_EnableIRQ(EXTI0_1_IRQn);
}
/* ===================================================== */
/* ================= ADC INIT =========================== */
/* ===================================================== */
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 INIT =========================== */
/* ===================================================== */
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 == BUTTON_PIN)
{
emergency_mode = !emergency_mode;
}
}
/* ===================================================== */
/* ================= HELPER FUNCTION ==================== */
/* ===================================================== */
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 PROGRAM ======================= */
/* ===================================================== */
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 (ANTI ERROR INTERRUPT) ===== */
uint8_t current_button = HAL_GPIO_ReadPin(BUTTON_PORT, BUTTON_PIN);
if (last_button_state == 1 && current_button == 0)
{
emergency_mode = !emergency_mode;
HAL_Delay(50); // debounce
}
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(PIR_PORT, PIR_PIN);
/* ===== 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);
}
}
e. Video Demo [Kembali]
f. Analisa [Kembali]
g. Download File [Kembali]
File Tugas Pendahuluan(.Zip) [Klik Disini]
Download File Analisa [Klik Disini]
Video Simulasi [Klik Disini]
Video Demo [Klik Disini]
Download Datasheet Pir Sensor (klik disini)
Download Datasheet Resistor (klik disini)
Download Datasheet LED (klik disini)
Download Datasheet STM32 Nucleo G474RE [Klik Disini]
Download Datasheet LDR Sensor [Klik Disini]
Download Datasheet Push Button [Klik Disini]
