camera.h

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/* USER CODE BEGIN Header */
#ifndef INC_CAMERA_H_
#define INC_CAMERA_H_
 
#include "stm32f4xx_hal.h"
#include <cstring>
#include <cstdio>
 
#define BLUE_THRESHOLD 200   // Adjust based on lighting and distance
#define STEP 4               // Read every 2 bytes = 1 pixel, STEP=4 = every other pixel
#define ROW_WIDTH 160
#define SAMPLE_WIDTH (ROW_WIDTH / 2)  // Because we skip every other pixel

enum DominantColor {
    COLOR_UNKNOWN,  
    COLOR_RED,      
    COLOR_GREEN,    
    COLOR_BLUE      
};

class OV2640Camera {
public:
    OV2640Camera(I2C_HandleTypeDef* i2c, SPI_HandleTypeDef* spi, GPIO_TypeDef* cs_port, uint16_t cs_pin);
 
    bool initialize();
    bool captureFrame();
    void printCaptureReport(UART_HandleTypeDef* huart);
    void printBlueDetectionMap(UART_HandleTypeDef* huart);
    DominantColor analyzeColor();
    DominantColor analyzeColorCenter();
 
private:
    I2C_HandleTypeDef* i2c_;

    SPI_HandleTypeDef* spi_;

    GPIO_TypeDef* cs_port_;

    uint16_t cs_pin_;

    static constexpr size_t FRAME_SIZE = 160 * 120 * 2; // QQVGA RGB565

    uint8_t frame_buffer_[FRAME_SIZE];
 
    void writeRegister(uint8_t reg, uint8_t val);
    void csHigh();
    void csLow();
};
 
 
 
#endif /* INC_CAMERA_H_ */