#include "ssd096_oled.h"
static void i2c_start(void)
{
    GPIO_SET(SSD096_SDA_PORT, SSD096_SDA_PIN);
    GPIO_SET(SSD096_SCK_PORT, SSD096_SCK_PIN);
    GPIO_RESET(SSD096_SDA_PORT, SSD096_SDA_PIN);
    GPIO_RESET(SSD096_SCK_PORT, SSD096_SCK_PIN);
}

static void i2c_stop(void)
{
    GPIO_RESET(SSD096_SDA_PORT, SSD096_SDA_PIN);
    GPIO_SET(SSD096_SCK_PORT, SSD096_SCK_PIN);
    GPIO_SET(SSD096_SDA_PORT, SSD096_SDA_PIN);
}

void i2c_write_byte(uint8_t data)
{
    uint8_t i;
    for (i = 0; i < 8; i++)
    {
        if ((data & 0x80) >> i)
            GPIO_SET(SSD096_SDA_PORT, SSD096_SDA_PIN);
        else
            GPIO_RESET(SSD096_SDA_PORT, SSD096_SDA_PIN);
        data <<= 1;
        GPIO_SET(SSD096_SCK_PORT, SSD096_SCK_PIN);
        GPIO_RESET(SSD096_SCK_PORT, SSD096_SCK_PIN);
    }
    GPIO_SET(SSD096_SCK_PORT, SSD096_SCK_PIN); // 额外的一个时钟，不处理应答信号
    GPIO_RESET(SSD096_SCK_PORT, SSD096_SCK_PIN);
}

/**
 * @brief 向I2C设备写入命令
 *
 * 通过I2C接口向指定设备写入一个命令字节。
 *
 * @param command 要写入的命令字节
 */
static void i2c_write_command(uint8_t command)
{
    i2c_start();
    i2c_write_byte(0x78);
    i2c_write_byte(0x00);
    i2c_write_byte(command);
    i2c_stop();
}

/**
 * @brief 向I2C设备写入一个字节的数据
 *
 * 该函数通过I2C总线向指定设备写入一个字节的数据。
 *
 * @param data 要写入的数据字节
 */
static void i2c_write_data(uint8_t data)
{
    i2c_start();
    i2c_write_byte(0x78);
    i2c_write_byte(0x40);
    i2c_write_byte(data);
    i2c_stop();
}

/**
 * @brief 设置SSD096 OLED显示屏上的光标位置
 *
 * 设置SSD096 OLED显示屏上的光标位置到指定的x和y坐标。
 *
 * @param x 横向位置，取值范围为0到127
 * @param y 纵向位置，取值范围为0到63
 */
void ssd096_set_position(uint8_t x, uint8_t y)
{
    i2c_write_command(0xb0 | y);
    i2c_write_command(0x10 | ((x & 0xf0) >> 4));
    i2c_write_command(0x00 | (x & 0x0f));
}

/**
 * @brief 清空SSD096显示屏
 *
 * 该函数将SSD096显示屏的内容清空，即将所有像素点设置为关闭状态。
 *
 * @note 该函数通过I2C接口向SSD096发送数据，以实现清屏操作。
 */
void ssd096_clear(void)
{
    uint8_t i, j;
    for (i = 0; i < 8; i++)
    {
        ssd096_set_position(i, 0);
        for (j = 0; j < 128; j++)
        {
            i2c_write_data(0x00);
        }
    }
}
void ssd096_full(void)
{
    uint8_t i, j;
    for (i = 0; i < 8; i++)
    {
        ssd096_set_position(i, 0);
        for (j = 0; j < 128; j++)
        {
            i2c_write_data(0xff);
        }
    }
}

/**
 * @brief 初始化SSD096显示驱动
 *
 * 该函数用于初始化SSD096显示驱动，完成基本的配置和初始化工作。
 */
void ssd096_init(void)
{
    i2c_write_command(0xae);
    i2c_write_command(0xd5);
    i2c_write_command(0x80);
    i2c_write_command(0xa8);
    i2c_write_command(0x3f);
    i2c_write_command(0xd3);
    i2c_write_command(0x00);
    i2c_write_command(0x40);
    i2c_write_command(0xa1);
    i2c_write_command(0xc8);
    i2c_write_command(0xda);
    i2c_write_command(0x12);
    i2c_write_command(0x81);
    i2c_write_command(0xcf);
    i2c_write_command(0xd9);
    i2c_write_command(0xf1);
    i2c_write_command(0xdb);
    i2c_write_command(0x30);
    i2c_write_command(0xa4);
    i2c_write_command(0xa6);
    i2c_write_command(0x8d);
    i2c_write_command(0x14);
    i2c_write_command(0xaf);

    ssd096_clear();

    ssd096_full();
}