/* USER CODE BEGIN Header */
/*
Project : Sistem Kontrol Air Bersih Berbasis STM32
MCU : STM32F103C8T6 / Blue Pill
Pin:
PA0 = Turbidity Sensor OUT / ADC1_IN0
PA1 = HC-SR04 TRIG
PA2 = HC-SR04 ECHO
PA3 = Flow Sensor OUT / EXTI3
PB0 = LED Hijau
PB1 = LED Kuning
PB2 = LED Merah
PB10 = Buzzer
PB12 = Relay Pompa / Motor
Prioritas:
1. Ultrasonic
2. Turbidity
3. Flow
*/
/* USER CODE END Header */
#include "main.h"
#include <stdio.h>
#include <string.h>
/* ===================== HANDLE PERIPHERAL ===================== */
ADC_HandleTypeDef hadc1;
TIM_HandleTypeDef htim2;
/* ===================== SETTING BATAS SISTEM ===================== */
#define FLOW_LIMIT_LMIN 1.3f
#define TURBIDITY_LIMIT_NTU 25.0f
#define ULTRASONIC_LIMIT_CM 6.0f
#define ULTRASONIC_HYST_START_CM 8.0f
/*
Relay aktif HIGH:
1 = PB12 HIGH -> Pompa ON
PB12 LOW -> Pompa OFF
Kalau relay kamu aktif LOW, ubah menjadi 0.
*/
#define RELAY_ACTIVE_HIGH 1
/*
Flow sensor YF-S201:
Flow L/min = Frequency / 7.5
*/
#define FLOW_CALIBRATION_FACTOR 7.5f
/* ===================== VARIABEL GLOBAL ===================== */
volatile uint32_t flowPulseCount = 0;
uint32_t turbidityADC = 0;
float turbidityNTU = 0.0f;
float flowRate = 0.0f;
float distanceCM = 0.0f;
uint32_t lastFlowTick = 0;
uint8_t flowReady = 0;
uint8_t isTankFullFlag = 0;
char systemStatus[30];
/* ===================== PROTOTYPE FUNCTION ===================== */
void SystemClock_Config(void);
static void MX_GPIO_Init(void);
static void MX_ADC1_Init(void);
static void MX_TIM2_Init(void);
void delay_us(uint16_t us);
uint32_t Read_ADC_Turbidity(void);
float Read_Turbidity_NTU(void);
float Read_Ultrasonic_CM(void);
float Read_Flow_LMin(void);
void Pump_ON(void);
void Pump_OFF(void);
void Green_LED_ON(void);
void Green_LED_OFF(void);
void Yellow_LED_ON(void);
void Yellow_LED_OFF(void);
void Red_LED_ON(void);
void Red_LED_OFF(void);
void All_LED_OFF(void);
void Buzzer_ON(void);
void Buzzer_OFF(void);
void System_Logic(float flow, float turbidity, float distance);
void Error_Handler(void);
/* ===================== MAIN PROGRAM ===================== */
int main(void)
{
HAL_Init();
SystemClock_Config();
MX_GPIO_Init();
MX_ADC1_Init();
MX_TIM2_Init();
HAL_ADCEx_Calibration_Start(&hadc1);
HAL_TIM_Base_Start(&htim2);
Pump_OFF();
All_LED_OFF();
Buzzer_OFF();
strcpy(systemStatus, "START");
/* =================================================================
PROSES STABILISASI AWAL SIMULASI PROTEUS (ANTI-KEDIP STARTUP)
================================================================= */
HAL_Delay(100); // Berikan waktu model Proteus siap
lastFlowTick = HAL_GetTick(); // Inisialisasi sebelum loop
flowReady = 0;
while (1)
{
distanceCM = Read_Ultrasonic_CM();
turbidityNTU = Read_Turbidity_NTU();
if (HAL_GetTick() - lastFlowTick >= 1000)
{
flowRate = Read_Flow_LMin();
lastFlowTick = HAL_GetTick();
flowReady = 1;
}
if (flowReady == 1)
{
System_Logic(flowRate, turbidityNTU, distanceCM);
}
else
{
Pump_OFF();
All_LED_OFF();
Buzzer_OFF();
}
HAL_Delay(100);
}
}
/* ===================== DELAY MICROSECOND ===================== */
void delay_us(uint16_t us)
{
__HAL_TIM_SET_COUNTER(&htim2, 0);
while (__HAL_TIM_GET_COUNTER(&htim2) < us)
{
}
}
/* ===================== SENSOR TURBIDITY ===================== */
uint32_t Read_ADC_Turbidity(void)
{
uint32_t adcValue = 0;
HAL_ADC_Start(&hadc1);
if (HAL_ADC_PollForConversion(&hadc1, 100) == HAL_OK)
{
adcValue = HAL_ADC_GetValue(&hadc1);
}
HAL_ADC_Stop(&hadc1);
return adcValue;
}
float Read_Turbidity_NTU(void)
{
uint32_t adcValue;
float ntu;
adcValue = Read_ADC_Turbidity();
turbidityADC = adcValue;
/*
Mapping Proteus:
ADC 0 = 0 NTU -> air bersih
ADC 4095 = 100 NTU -> air sangat keruh
Jika sensor turbidity kamu terbaca terbalik, pakai rumus alternatif
yang ada di komentar bawah.
*/
ntu = ((float)adcValue * 100.0f) / 4095.0f;
/*
Rumus alternatif jika sensor terbaca terbalik:
ntu = ((4095.0f - (float)adcValue) * 100.0f) / 4095.0f;
*/
if (ntu < 0.0f)
{
ntu = 0.0f;
}
if (ntu > 100.0f)
{
ntu = 100.0f;
}
return ntu;
}
/* ===================== SENSOR ULTRASONIC HC-SR04 (REVISI) ===================== */
float Read_Ultrasonic_CM(void)
{
uint32_t echoTime = 0;
float distance = 999.0f;
HAL_GPIO_WritePin(GPIOA, GPIO_PIN_1, GPIO_PIN_RESET);
delay_us(5);
HAL_GPIO_WritePin(GPIOA, GPIO_PIN_1, GPIO_PIN_SET);
delay_us(20);
HAL_GPIO_WritePin(GPIOA, GPIO_PIN_1, GPIO_PIN_RESET);
/*
Tunggu ECHO HIGH
*/
__HAL_TIM_SET_COUNTER(&htim2, 0);
while (HAL_GPIO_ReadPin(GPIOA, GPIO_PIN_2) == GPIO_PIN_RESET)
{
if (__HAL_TIM_GET_COUNTER(&htim2) > 30000)
{
return 999.0f;
}
}
/*
Hitung durasi ECHO HIGH
*/
__HAL_TIM_SET_COUNTER(&htim2, 0);
while (HAL_GPIO_ReadPin(GPIOA, GPIO_PIN_2) == GPIO_PIN_SET)
{
if (__HAL_TIM_GET_COUNTER(&htim2) > 30000)
{
return 999.0f;
}
}
echoTime = __HAL_TIM_GET_COUNTER(&htim2);
distance = echoTime / 58.0f;
return distance;
}
/* ===================== SENSOR FLOW ===================== */
void HAL_GPIO_EXTI_Callback(uint16_t GPIO_Pin)
{
if (GPIO_Pin == GPIO_PIN_3)
{
flowPulseCount++;
}
}
float Read_Flow_LMin(void)
{
uint32_t pulseCopy = 0;
float flow = 0.0f;
__disable_irq();
pulseCopy = flowPulseCount;
flowPulseCount = 0;
__enable_irq();
flow = (float)pulseCopy / FLOW_CALIBRATION_FACTOR;
return flow;
}
/* ===================== OUTPUT CONTROL ===================== */
void Pump_ON(void)
{
#if RELAY_ACTIVE_HIGH
HAL_GPIO_WritePin(GPIOB, GPIO_PIN_12, GPIO_PIN_SET);
#else
HAL_GPIO_WritePin(GPIOB, GPIO_PIN_12, GPIO_PIN_RESET);
#endif
}
void Pump_OFF(void)
{
#if RELAY_ACTIVE_HIGH
HAL_GPIO_WritePin(GPIOB, GPIO_PIN_12, GPIO_PIN_RESET);
#else
HAL_GPIO_WritePin(GPIOB, GPIO_PIN_12, GPIO_PIN_SET);
#endif
}
void Green_LED_ON(void)
{
HAL_GPIO_WritePin(GPIOB, GPIO_PIN_0, GPIO_PIN_SET);
}
void Green_LED_OFF(void)
{
HAL_GPIO_WritePin(GPIOB, GPIO_PIN_0, GPIO_PIN_RESET);
}
void Yellow_LED_ON(void)
{
HAL_GPIO_WritePin(GPIOB, GPIO_PIN_1, GPIO_PIN_SET);
}
void Yellow_LED_OFF(void)
{
HAL_GPIO_WritePin(GPIOB, GPIO_PIN_1, GPIO_PIN_RESET);
}
void Red_LED_ON(void)
{
HAL_GPIO_WritePin(GPIOB, GPIO_PIN_2, GPIO_PIN_SET);
}
void Red_LED_OFF(void)
{
HAL_GPIO_WritePin(GPIOB, GPIO_PIN_2, GPIO_PIN_RESET);
}
void All_LED_OFF(void)
{
Green_LED_OFF();
Yellow_LED_OFF();
Red_LED_OFF();
}
void Buzzer_ON(void)
{
HAL_GPIO_WritePin(GPIOB, GPIO_PIN_10, GPIO_PIN_SET);
}
void Buzzer_OFF(void)
{
HAL_GPIO_WritePin(GPIOB, GPIO_PIN_10, GPIO_PIN_RESET);
}
/* ===================== LOGIKA SISTEM PRIORITAS ===================== */
void System_Logic(float flow, float turbidity, float distance)
{
All_LED_OFF();
/*
PRIORITAS 1: ULTRASONIC
Jika jarak <= 3 cm:
Motor mati
LED merah ON
Buzzer ON
*/
if (distance > 0.0f && distance <= ULTRASONIC_LIMIT_CM)
{
Pump_OFF();
Red_LED_ON();
Buzzer_ON();
strcpy(systemStatus, "Penuh");
return;
}
/*
PRIORITAS 2: TURBIDITY
Jika turbidity > 25 NTU:
Motor mati
LED kuning ON
Buzzer ON
*/
if (turbidity > TURBIDITY_LIMIT_NTU)
{
Pump_OFF();
Green_LED_OFF();
Yellow_LED_ON();
Red_LED_OFF();
Buzzer_ON();
strcpy(systemStatus, "AIR KERUH");
return;
}
/*
PRIORITAS 3: FLOW
Jika flow < 1.3 L/min:
Motor mati
LED merah ON
Buzzer ON
*/
if (flow < FLOW_LIMIT_LMIN)
{
Pump_OFF();
Green_LED_OFF();
Yellow_LED_OFF();
Red_LED_ON();
Buzzer_ON();
strcpy(systemStatus, "FLOW KECIL");
return;
}
/*
NORMAL
Jika ultrasonic > 3 cm,
turbidity <= 25 NTU,
flow >= 1.3 L/min
*/
Pump_ON();
Green_LED_ON();
Yellow_LED_OFF();
Red_LED_OFF();
Buzzer_OFF();
strcpy(systemStatus, "NORMAL");
}
/* ===================== CLOCK CONFIG ===================== */
void SystemClock_Config(void)
{
RCC_OscInitTypeDef RCC_OscInitStruct = {0};
RCC_ClkInitTypeDef RCC_ClkInitStruct = {0};
RCC_PeriphCLKInitTypeDef PeriphClkInit = {0};
/*
Menggunakan HSI internal.
Cocok untuk Proteus tanpa crystal eksternal.
HSI = 8 MHz
PLL Source = HSI / 2 = 4 MHz
PLL x16 = 64 MHz
SYSCLK = 64 MHz
*/
RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSI;
RCC_OscInitStruct.HSIState = RCC_HSI_ON;
RCC_OscInitStruct.HSICalibrationValue = RCC_HSICALIBRATION_DEFAULT;
RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSI_DIV2;
RCC_OscInitStruct.PLL.PLLMUL = RCC_PLL_MUL16;
if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
{
Error_Handler();
}
RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK |
RCC_CLOCKTYPE_SYSCLK |
RCC_CLOCKTYPE_PCLK1 |
RCC_CLOCKTYPE_PCLK2;
RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;
RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV2;
RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1;
if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_2) != HAL_OK)
{
Error_Handler();
}
/*
ADC Clock = 64 MHz / 6 = 10.67 MHz
*/
PeriphClkInit.PeriphClockSelection = RCC_PERIPHCLK_ADC;
PeriphClkInit.AdcClockSelection = RCC_ADCPCLK2_DIV6;
if (HAL_RCCEx_PeriphCLKConfig(&PeriphClkInit) != HAL_OK)
{
Error_Handler();
}
}
/* ===================== ADC1 INIT ===================== */
static void MX_ADC1_Init(void)
{
ADC_ChannelConfTypeDef sConfig = {0};
hadc1.Instance = ADC1;
hadc1.Init.ScanConvMode = ADC_SCAN_DISABLE;
hadc1.Init.ContinuousConvMode = DISABLE;
hadc1.Init.DiscontinuousConvMode = DISABLE;
hadc1.Init.ExternalTrigConv = ADC_SOFTWARE_START;
hadc1.Init.DataAlign = ADC_DATAALIGN_RIGHT;
hadc1.Init.NbrOfConversion = 1;
if (HAL_ADC_Init(&hadc1) != HAL_OK)
{
Error_Handler();
}
sConfig.Channel = ADC_CHANNEL_0;
sConfig.Rank = ADC_REGULAR_RANK_1;
sConfig.SamplingTime = ADC_SAMPLETIME_55CYCLES_5;
if (HAL_ADC_ConfigChannel(&hadc1, &sConfig) != HAL_OK)
{
Error_Handler();
}
}
/* ===================== TIM2 INIT ===================== */
static void MX_TIM2_Init(void)
{
TIM_ClockConfigTypeDef sClockSourceConfig = {0};
TIM_MasterConfigTypeDef sMasterConfig = {0};
/*
SYSCLK = 64 MHz
TIM2 Prescaler = 63
Timer clock = 1 MHz
1 count = 1 us
*/
htim2.Instance = TIM2;
htim2.Init.Prescaler = 63;
htim2.Init.CounterMode = TIM_COUNTERMODE_UP;
htim2.Init.Period = 65535;
htim2.Init.ClockDivision = TIM_CLOCKDIVISION_DIV1;
htim2.Init.AutoReloadPreload = TIM_AUTORELOAD_PRELOAD_DISABLE;
if (HAL_TIM_Base_Init(&htim2) != HAL_OK)
{
Error_Handler();
}
sClockSourceConfig.ClockSource = TIM_CLOCKSOURCE_INTERNAL;
if (HAL_TIM_ConfigClockSource(&htim2, &sClockSourceConfig) != HAL_OK)
{
Error_Handler();
}
sMasterConfig.MasterOutputTrigger = TIM_TRGO_RESET;
sMasterConfig.MasterSlaveMode = TIM_MASTERSLAVEMODE_DISABLE;
if (HAL_TIMEx_MasterConfigSynchronization(&htim2, &sMasterConfig) != HAL_OK)
{
Error_Handler();
}
}
/* ===================== GPIO INIT ===================== */
static void MX_GPIO_Init(void)
{
GPIO_InitTypeDef GPIO_InitStruct = {0};
__HAL_RCC_GPIOA_CLK_ENABLE();
__HAL_RCC_GPIOB_CLK_ENABLE();
/*
Kondisi awal output
*/
HAL_GPIO_WritePin(GPIOA, GPIO_PIN_1, GPIO_PIN_RESET);
HAL_GPIO_WritePin(GPIOB,
GPIO_PIN_0 |
GPIO_PIN_1 |
GPIO_PIN_2 |
GPIO_PIN_10 |
GPIO_PIN_12,
GPIO_PIN_RESET);
/*
PA0 = Turbidity ADC input
*/
GPIO_InitStruct.Pin = GPIO_PIN_0;
GPIO_InitStruct.Mode = GPIO_MODE_ANALOG;
HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
/*
PA1 = Ultrasonic TRIG
*/
GPIO_InitStruct.Pin = GPIO_PIN_1;
GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
GPIO_InitStruct.Pull = GPIO_NOPULL;
GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_HIGH;
HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
/*
PA2 = Ultrasonic ECHO
*/
GPIO_InitStruct.Pin = GPIO_PIN_2;
GPIO_InitStruct.Mode = GPIO_MODE_INPUT;
GPIO_InitStruct.Pull = GPIO_PULLDOWN; /* ← ganti dari GPIO_NOPULL */
HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
/*
PA3 = Flow sensor interrupt
*/
GPIO_InitStruct.Pin = GPIO_PIN_3;
GPIO_InitStruct.Mode = GPIO_MODE_IT_RISING;
GPIO_InitStruct.Pull = GPIO_PULLUP;
HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
/*
PB0 = LED Hijau
PB1 = LED Kuning
PB2 = LED Merah
PB10 = Buzzer
PB12 = Relay Pompa
*/
GPIO_InitStruct.Pin = GPIO_PIN_0 |
GPIO_PIN_1 |
GPIO_PIN_2 |
GPIO_PIN_10 |
GPIO_PIN_12;
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);
/*
Interrupt PA3 untuk flow sensor
*/
HAL_NVIC_SetPriority(EXTI3_IRQn, 0, 0);
HAL_NVIC_EnableIRQ(EXTI3_IRQn);
}
/* ===================== ERROR HANDLER ===================== */
void Error_Handler(void)
{
__disable_irq();
while (1)
{
HAL_GPIO_TogglePin(GPIOB, GPIO_PIN_2);
HAL_Delay(300);
}
}
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