#include "iic.h"
#include "stm32f10x.h"


#include <stdint.h>





const uint8_t Font6x8[][6] = {
  // SPACE (0x20)
  {0x00,0x00,0x00,0x00,0x00,0x00}, // ' '
  {0x00,0x00,0x5F,0x00,0x00,0x00}, // '!'
  {0x00,0x07,0x00,0x07,0x00,0x00}, // '"'
  {0x14,0x7F,0x14,0x7F,0x14,0x00}, // '#'
  {0x24,0x2A,0x7F,0x2A,0x12,0x00}, // '$'
  {0x23,0x13,0x08,0x64,0x62,0x00}, // '%'
  {0x36,0x49,0x55,0x22,0x50,0x00}, // '&'
  {0x00,0x05,0x03,0x00,0x00,0x00}, // '''
  {0x00,0x1C,0x22,0x41,0x00,0x00}, // '('
  {0x00,0x41,0x22,0x1C,0x00,0x00}, // ')'
  {0x14,0x08,0x3E,0x08,0x14,0x00}, // '*'
  {0x08,0x08,0x3E,0x08,0x08,0x00}, // '+'
  {0x00,0x50,0x30,0x00,0x00,0x00}, // ','
  {0x08,0x08,0x08,0x08,0x08,0x00}, // '-'
  {0x00,0x60,0x60,0x00,0x00,0x00}, // '.'
  {0x20,0x10,0x08,0x04,0x02,0x00}, // '/'

  {0x3E,0x51,0x49,0x45,0x3E,0x00}, // '0' (0x30)
  {0x00,0x42,0x7F,0x40,0x00,0x00}, // '1'
  {0x42,0x61,0x51,0x49,0x46,0x00}, // '2'
  {0x21,0x41,0x45,0x4B,0x31,0x00}, // '3'
  {0x18,0x14,0x12,0x7F,0x10,0x00}, // '4'
  {0x27,0x45,0x45,0x45,0x39,0x00}, // '5'
  {0x3C,0x4A,0x49,0x49,0x30,0x00}, // '6'
  {0x01,0x71,0x09,0x05,0x03,0x00}, // '7'
  {0x36,0x49,0x49,0x49,0x36,0x00}, // '8'
  {0x06,0x49,0x49,0x29,0x1E,0x00}, // '9'

  {0x00,0x36,0x36,0x00,0x00,0x00}, // ':' (0x3A)
  {0x00,0x56,0x36,0x00,0x00,0x00}, // ';'
  {0x08,0x14,0x22,0x41,0x00,0x00}, // '<'
  {0x14,0x14,0x14,0x14,0x14,0x00}, // '='
  {0x00,0x41,0x22,0x14,0x08,0x00}, // '>'
  {0x02,0x01,0x51,0x09,0x06,0x00}, // '?'

  {0x32,0x49,0x79,0x41,0x3E,0x00}, // '@' (0x40)
  {0x7E,0x11,0x11,0x11,0x7E,0x00}, // 'A'
  {0x7F,0x49,0x49,0x49,0x36,0x00}, // 'B'
  {0x3E,0x41,0x41,0x41,0x22,0x00}, // 'C'
  {0x7F,0x41,0x41,0x22,0x1C,0x00}, // 'D'
  {0x7F,0x49,0x49,0x49,0x41,0x00}, // 'E'
  {0x7F,0x09,0x09,0x09,0x01,0x00}, // 'F'
  {0x3E,0x41,0x49,0x49,0x7A,0x00}, // 'G'
  {0x7F,0x08,0x08,0x08,0x7F,0x00}, // 'H'
  {0x00,0x41,0x7F,0x41,0x00,0x00}, // 'I'
  {0x20,0x40,0x41,0x3F,0x01,0x00}, // 'J'
  {0x7F,0x08,0x14,0x22,0x41,0x00}, // 'K'
  {0x7F,0x40,0x40,0x40,0x40,0x00}, // 'L'
  {0x7F,0x02,0x0C,0x02,0x7F,0x00}, // 'M'
  {0x7F,0x04,0x08,0x10,0x7F,0x00}, // 'N'
  {0x3E,0x41,0x41,0x41,0x3E,0x00}, // 'O'

  {0x7F,0x09,0x09,0x09,0x06,0x00}, // 'P' (0x50)
  {0x3E,0x41,0x51,0x21,0x5E,0x00}, // 'Q'
  {0x7F,0x09,0x19,0x29,0x46,0x00}, // 'R'
  {0x46,0x49,0x49,0x49,0x31,0x00}, // 'S'
  {0x01,0x01,0x7F,0x01,0x01,0x00}, // 'T'
  {0x3F,0x40,0x40,0x40,0x3F,0x00}, // 'U'
  {0x1F,0x20,0x40,0x20,0x1F,0x00}, // 'V'
  {0x3F,0x40,0x38,0x40,0x3F,0x00}, // 'W'
  {0x63,0x14,0x08,0x14,0x63,0x00}, // 'X'
  {0x07,0x08,0x70,0x08,0x07,0x00}, // 'Y'
  {0x61,0x51,0x49,0x45,0x43,0x00}, // 'Z'

  {0x00,0x7F,0x41,0x41,0x00,0x00}, // '['
  {0x02,0x04,0x08,0x10,0x20,0x00}, // '\'
  {0x00,0x41,0x41,0x7F,0x00,0x00}, // ']'
  {0x04,0x02,0x01,0x02,0x04,0x00}, // '^'
  {0x80,0x80,0x80,0x80,0x80,0x00}, // '_'
  {0x00,0x03,0x05,0x00,0x00,0x00}, // '`'

  {0x20,0x54,0x54,0x54,0x78,0x00}, // 'a' (0x61)
  {0x7F,0x48,0x44,0x44,0x38,0x00}, // 'b'
  {0x38,0x44,0x44,0x44,0x20,0x00}, // 'c'
  {0x38,0x44,0x44,0x48,0x7F,0x00}, // 'd'
  {0x38,0x54,0x54,0x54,0x18,0x00}, // 'e'
  {0x08,0x7E,0x09,0x01,0x02,0x00}, // 'f'
  {0x0C,0x52,0x52,0x52,0x3E,0x00}, // 'g'
  {0x7F,0x08,0x04,0x04,0x78,0x00}, // 'h'
  {0x00,0x44,0x7D,0x40,0x00,0x00}, // 'i'
  {0x20,0x40,0x44,0x3D,0x00,0x00}, // 'j'
  {0x7F,0x10,0x28,0x44,0x00,0x00}, // 'k'
  {0x00,0x41,0x7F,0x40,0x00,0x00}, // 'l'
  {0x7C,0x04,0x18,0x04,0x78,0x00}, // 'm'
  {0x7C,0x08,0x04,0x04,0x78,0x00}, // 'n'
  {0x38,0x44,0x44,0x44,0x38,0x00}, // 'o'

  {0x7C,0x14,0x14,0x14,0x08,0x00}, // 'p' (0x70)
  {0x08,0x14,0x14,0x18,0x7C,0x00}, // 'q'
  {0x7C,0x08,0x04,0x04,0x08,0x00}, // 'r'
  {0x48,0x54,0x54,0x54,0x20,0x00}, // 's'
  {0x04,0x3F,0x44,0x40,0x20,0x00}, // 't'
  {0x3C,0x40,0x40,0x20,0x7C,0x00}, // 'u'
  {0x1C,0x20,0x40,0x20,0x1C,0x00}, // 'v'
  {0x3C,0x40,0x30,0x40,0x3C,0x00}, // 'w'
  {0x44,0x28,0x10,0x28,0x44,0x00}, // 'x'
  {0x0C,0x50,0x50,0x50,0x3C,0x00}, // 'y'
  {0x44,0x64,0x54,0x4C,0x44,0x00}, // 'z'

  {0x08,0x36,0x41,0x00,0x00,0x00}, // '{'
  {0x00,0x00,0x7F,0x00,0x00,0x00}, // '|'
  {0x00,0x41,0x36,0x08,0x00,0x00}, // '}'
  {0x02,0x01,0x02,0x04,0x02,0x00}, // '~'
};

#define OLED_WIDTH 128
#define OLED_HEIGHT 64

// OLED 显存，1bit 表示一个像素（黑白屏）
// 128 * 64 / 8 = 1024 字节
uint8_t OLED_GRAM[8][128];  // 8页，每页8行，共64行

#define SDA_PIN     GPIO_Pin_8
#define SCL_PIN     GPIO_Pin_9
#define I2C_PORT    GPIOB

#define SDA_HIGH()  GPIO_SetBits(I2C_PORT, SDA_PIN)
#define SDA_LOW()   GPIO_ResetBits(I2C_PORT, SDA_PIN)
#define SCL_HIGH()  GPIO_SetBits(I2C_PORT, SCL_PIN)
#define SCL_LOW()   GPIO_ResetBits(I2C_PORT, SCL_PIN)

#define READ_SDA()  GPIO_ReadInputDataBit(I2C_PORT, SDA_PIN)


void delay(){
  __NOP();
   
}

void delay_us_simple(uint32_t us)
{
    uint32_t i;
    while(us--)
    {
        for(i = 0; i < 8; i++);  // 简单调整这个数字以匹配频率
    }
}

void delay_ms_simple(uint32_t ms)
{
    while(ms--)
    {
        delay_us_simple(1000);  // 1000 微秒 = 1 毫秒
    }
}



void IIC_GPIO_Init(void)
{
    RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB, ENABLE);

    GPIO_InitTypeDef GPIO_InitStructure;
    GPIO_InitStructure.GPIO_Pin = SDA_PIN | SCL_PIN;
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_OD; // ????
    GPIO_Init(I2C_PORT, &GPIO_InitStructure);

    SDA_HIGH();
    SCL_HIGH();
}


void IIC_Delay(void)
{
    //delay(1);  // 5us 延时，100kHz I2C
}

void IIC_Start(void)
{
    SDA_HIGH();
    SCL_HIGH();
    IIC_Delay();
    SDA_LOW();
    IIC_Delay();
    SCL_LOW();
    IIC_Delay();
}

void IIC_Stop(void)
{
    SDA_LOW();
    SCL_HIGH();
    IIC_Delay();
    SDA_HIGH();
    IIC_Delay();
}

void IIC_Send_Byte(uint8_t data)
{
    for (int i = 0; i < 8; i++) {
        if (data & 0x80)
            SDA_HIGH();
        else
            SDA_LOW();
        data <<= 1;

        IIC_Delay();
        SCL_HIGH();
        IIC_Delay();
        SCL_LOW();
        IIC_Delay();
    }
}

uint8_t IIC_Read_Byte(uint8_t ack)
{
    uint8_t data = 0;

    SDA_HIGH();  // 释放 SDA

    for (int i = 0; i < 8; i++) {
        data <<= 1;
        SCL_HIGH();
        IIC_Delay();
        if (READ_SDA()) data |= 1;
        SCL_LOW();
        IIC_Delay();
    }

    // 发送 ACK 或 NACK
    if (ack)
        SDA_LOW();
    else
        SDA_HIGH();

    IIC_Delay();
    SCL_HIGH();
    IIC_Delay();
    SCL_LOW();
    SDA_HIGH();  // 释放 SDA

    return data;
}

uint8_t IIC_Wait_Ack(void)
{
    uint8_t timeout = 0;

    SDA_HIGH();  // 释放 SDA
    IIC_Delay();
    SCL_HIGH();
    IIC_Delay();

    while (READ_SDA()) {
        timeout++;
        if (timeout > 250) {
            IIC_Stop();
            return 1;  // 失败
        }
    }

    SCL_LOW();
    return 0;  // 成功
}

void IIC_Ack(void)
{
    SDA_LOW();
    IIC_Delay();
    SCL_HIGH();
    IIC_Delay();
    SCL_LOW();
    SDA_HIGH();
}

void IIC_NAck(void)
{
    SDA_HIGH();
    IIC_Delay();
    SCL_HIGH();
    IIC_Delay();
    SCL_LOW();
}


void OLED_WriteCommand(uint8_t cmd)
{
    IIC_Start();
    IIC_Send_Byte(0x78);     // I2C 地址
    IIC_Wait_Ack();
    IIC_Send_Byte(0x00);     // 写命令
    IIC_Wait_Ack();
    IIC_Send_Byte(cmd);
    IIC_Wait_Ack();
    IIC_Stop();
}

void OLED_WriteData(uint8_t data)
{
    IIC_Start();
    IIC_Send_Byte(0x78);
    IIC_Wait_Ack();
    IIC_Send_Byte(0x40);     // 写数据
    IIC_Wait_Ack();
    IIC_Send_Byte(data);
    IIC_Wait_Ack();
    IIC_Stop();
}



void OLED_Fill(uint8_t data)
{
    for(uint8_t page = 0; page < 8; page++)
    {
        OLED_WriteCommand(0xB0 + page); // 页地址
        OLED_WriteCommand(0x00);        // 列低地址
        OLED_WriteCommand(0x10);        // 列高地址

        for(uint8_t col = 0; col < 128; col++)
        {
            OLED_WriteData(data);
        }
    }
}

void OLED_Init(void)
{
    delay_ms_simple(100); // 等待 OLED 上电稳定

    OLED_WriteCommand(0xAE); // 关闭显示

    OLED_WriteCommand(0x20); // 设置内存地址模式
    OLED_WriteCommand(0x10); // 00,水平地址模式; 01,垂直地址模式; 10,页地址模式（默认）

    OLED_WriteCommand(0xB0); // 设置页起始地址（0~7）

    OLED_WriteCommand(0xC8); // COM输出扫描方向：从 COM[N-1] 到 COM0

    OLED_WriteCommand(0x00); // 设置低列起始地址
    OLED_WriteCommand(0x10); // 设置高列起始地址

    OLED_WriteCommand(0x40); // 设置起始行地址（0~63）

    OLED_WriteCommand(0x81); // 对比度设置
    OLED_WriteCommand(0xFF); // 对比度值（0x00~0xFF）

    OLED_WriteCommand(0xA1); // 段重映射：正常（A0），反转（A1）

    OLED_WriteCommand(0xA6); // 显示正常（A6），反相显示（A7）

    OLED_WriteCommand(0xA8); // 多路复用率
    OLED_WriteCommand(0x3F); // 1/64 duty（0x3F）

    OLED_WriteCommand(0xA4); // 全局显示开启，输出跟随 RAM 内容

    OLED_WriteCommand(0xD3); // 设置显示偏移
    OLED_WriteCommand(0x00); // 无偏移

    OLED_WriteCommand(0xD5); // 设置显示时钟分频比/振荡器频率
    OLED_WriteCommand(0x80); // 推荐值

    OLED_WriteCommand(0xD9); // 设置预充电周期
    OLED_WriteCommand(0xF1); // 推荐值

    OLED_WriteCommand(0xDA); // 设置 COM 引脚配置
    OLED_WriteCommand(0x12);

    OLED_WriteCommand(0xDB); // 设置 VCOMH 电压倍率
    OLED_WriteCommand(0x40); // 推荐值

    OLED_WriteCommand(0x8D); // 使能电荷泵
    OLED_WriteCommand(0x14); // 开启

    OLED_WriteCommand(0xAF); // 开启显示

    OLED_Fill(0xFF);         // 清屏
}

void OLED_DrawPixel(uint8_t x, uint8_t y, uint8_t color) {
    if (x >= OLED_WIDTH || y >= OLED_HEIGHT) return;

    if (color)
        OLED_GRAM[y / 8][x] |=  (1 << (y % 8));
    else
        OLED_GRAM[y / 8][x] &= ~(1 << (y % 8));
}



void OLED_Refresh(void) {
    for (uint8_t page = 0; page < 8; page++) {
        OLED_WriteCommand(0xB0 + page); // 设置页地址
        OLED_WriteCommand(0x00);        // 设置低列地址
        OLED_WriteCommand(0x10);        // 设置高列地址

        for (uint8_t col = 0; col < OLED_WIDTH; col++) {
            OLED_WriteData(OLED_GRAM[page][col]);
        }
    }
}
void OLED_ShowChar(uint8_t x, uint8_t y, char chr) {
    if (x > OLED_WIDTH - 6 || y > 7) return;

    uint8_t c = chr - 32;  // ASCII偏移
    for (uint8_t i = 0; i < 6; i++) {
        OLED_GRAM[y][x + i] = Font6x8[c][i];
    }
}




void lcd_show_all_ascii_lowercase() {
    uint16_t x = 0, y = 0;
    char ch = 'a';

    for (int row = 0; row < 10; row++) {
        for (int col = 0; col < 16; col++) {
            OLED_ShowChar(x, y, ch);  // 白色
            x += 8;
            ch++;
            if (ch > 'z') ch = 'a';  // 循环 a-z
        }
        x = 0;
        y += 16;
    }
}

void test(){
	
	
	
	
		IIC_GPIO_Init();
	
     OLED_Init();
	
	lcd_show_all_ascii_lowercase();
	
	OLED_Refresh();
	
	while(1){
	
		//OLED_Fill(0xFF);         // 清屏
		//delay_ms_simple(1000);
		
	  //OLED_Fill(0x00);
		//delay_ms_simple(1000);

	
	
	}


}