#include "stm32f1xx_hal.h"
#include "liquidcrystal_i2c.h"
#include <stdio.h>
#include <string.h>

// Глобальные переменные
I2C_HandleTypeDef hi2c1;
ADC_HandleTypeDef hadc1;
char buffer[17];
uint32_t adc_value = 0;
float voltage = 0;

// Прототипы
static void SystemClock_Config(void);
static void MX_GPIO_Init(void);
static void MX_ADC1_Init(void);
static void MX_I2C1_Init(void);
static uint32_t Read_ADC(void);
static void LCD_Display_ADC(void);

// Функция чтения АЦП с PA0
static uint32_t Read_ADC(void)
{
    uint32_t value = 0;
    HAL_ADC_Start(&hadc1);
    if(HAL_ADC_PollForConversion(&hadc1, 100) == HAL_OK)
    {
        value = HAL_ADC_GetValue(&hadc1);
    }
    HAL_ADC_Stop(&hadc1);
    return value;
}

// Функция вывода на LCD
static void LCD_Display_ADC(void)
{
    adc_value = Read_ADC();
    voltage = (adc_value * 3.3f) / 4096.0f;
    
    // Первая строка
    HD44780_SetCursor(0, 0);
    sprintf(buffer, "ADC: %4lu", adc_value);
    HD44780_PrintStr(buffer);
    
    // Вторая строка
    HD44780_SetCursor(0, 1);
    sprintf(buffer, "U: %.2fV", (double)voltage);
    HD44780_PrintStr(buffer);
}

// Настройка системы
static void SystemClock_Config(void)
{
    RCC_OscInitTypeDef RCC_OscInitStruct = {0};
    RCC_ClkInitTypeDef RCC_ClkInitStruct = {0};

    RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE;
    RCC_OscInitStruct.HSEState = RCC_HSE_ON;
    RCC_OscInitStruct.HSEPredivValue = RCC_HSE_PREDIV_DIV1;
    RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
    RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE;
    RCC_OscInitStruct.PLL.PLLMUL = RCC_PLL_MUL9;
    HAL_RCC_OscConfig(&RCC_OscInitStruct);

    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;
    HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_2);
}

// Настройка I2C1 для LCD
static void MX_I2C1_Init(void)
{
    __HAL_RCC_I2C1_CLK_ENABLE();
    __HAL_RCC_GPIOB_CLK_ENABLE();
    
    GPIO_InitTypeDef GPIO_InitStruct = {0};
    GPIO_InitStruct.Pin = GPIO_PIN_6 | GPIO_PIN_7;
    GPIO_InitStruct.Mode = GPIO_MODE_AF_OD;
    GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_HIGH;
    HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);
    
    hi2c1.Instance = I2C1;
    hi2c1.Init.ClockSpeed = 100000;
    hi2c1.Init.DutyCycle = I2C_DUTYCYCLE_2;
    hi2c1.Init.OwnAddress1 = 0;
    hi2c1.Init.AddressingMode = I2C_ADDRESSINGMODE_7BIT;
    HAL_I2C_Init(&hi2c1);
}

// Настройка АЦП (PA0)
static void MX_ADC1_Init(void)
{
    __HAL_RCC_ADC1_CLK_ENABLE();
    __HAL_RCC_GPIOA_CLK_ENABLE();
    
    GPIO_InitTypeDef GPIO_InitStruct = {0};
    GPIO_InitStruct.Pin = GPIO_PIN_0;
    GPIO_InitStruct.Mode = GPIO_MODE_ANALOG;
    HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
    
    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;
    HAL_ADC_Init(&hadc1);
    
    ADC_ChannelConfTypeDef sConfig = {0};
    sConfig.Channel = ADC_CHANNEL_0;
    sConfig.Rank = 1;
    sConfig.SamplingTime = ADC_SAMPLETIME_55CYCLES_5;
    HAL_ADC_ConfigChannel(&hadc1, &sConfig);
}

// HAL MSP инициализация
void HAL_MspInit(void)
{
    __HAL_RCC_AFIO_CLK_ENABLE();
}

int main(void)
{
    HAL_Init();
    SystemClock_Config();
    MX_ADC1_Init();   // АЦП на PA0
    MX_I2C1_Init();   // I2C для LCD
    
    // Инициализация LCD
    HD44780_Init(2);
    HD44780_Backlight();
    HD44780_Clear();
    
    // Заголовок
    HD44780_SetCursor(0, 0);
    HD44780_PrintStr("ADC Ready");
    
    HAL_Delay(1000);
    HD44780_Clear();
    
    while(1)
    {
        LCD_Display_ADC();
        HAL_Delay(500);  // Обновление каждые 500 мс
    }
}