/******************** (C) COPYRIGHT 2023 GeekRebot *****************************
* File Name          : oled.c
* Current Version    : V1.0 & ST 3.5.0
* Author             : zhanli 719901725@qq.com
* Date of Issued     : 2024.01.09
* Comments           : oled的iic方式驱动
                       SCL -> PA10，SDA -> PA11
********************************************************************************/
#include "oled.h"
#include "stdlib.h"
#include "oledfont.h"
#include "delay.h"
#include "bsp_iic.h"
// OLED的显存
// 存放格式如下.
//[0]0 1 2 3 ... 127
//[1]0 1 2 3 ... 127
//[2]0 1 2 3 ... 127
//[3]0 1 2 3 ... 127
//[4]0 1 2 3 ... 127
//[5]0 1 2 3 ... 127
//[6]0 1 2 3 ... 127
//[7]0 1 2 3 ... 127

void Write_IIC_Command(unsigned char IIC_Command)
{
    IIC_Start();
    IIC_Send_Byte(0x78); // Slave address,SA0=0
    IIC_Wait_Ack();
    IIC_Send_Byte(0x00); // write command
    IIC_Wait_Ack();
    IIC_Send_Byte(IIC_Command);
    IIC_Wait_Ack();
    IIC_Stop();
}
/**********************************************
// IIC Write Data
**********************************************/
void Write_IIC_Data(unsigned char IIC_Data)
{
    IIC_Start();
    IIC_Send_Byte(0x78); // D/C#=0; R/W#=0
    IIC_Wait_Ack();
    IIC_Send_Byte(0x40); // write data
    IIC_Wait_Ack();
    IIC_Send_Byte(IIC_Data);
    IIC_Wait_Ack();
    IIC_Stop();
}

void OLED_WR_Byte(unsigned dat, unsigned cmd)
{
    if (cmd)
    {
        Write_IIC_Data(dat);
    }
    else
    {
        Write_IIC_Command(dat);
    }
}

/********************************************
// fill_Picture
********************************************/
void fill_picture(unsigned char fill_Data)
{
    unsigned char m, n;
    for (m = 0; m < 8; m++)
    {
        OLED_WR_Byte(0xb0 + m, 0); // page0-page1
        OLED_WR_Byte(0x00, 0);     // low column start address
        OLED_WR_Byte(0x10, 0);     // high column start address
        for (n = 0; n < 128; n++)
        {
            OLED_WR_Byte(fill_Data, 1);
        }
    }
}

/***********************Delay****************************************/
void Delay_50ms(unsigned int Del_50ms)
{
    unsigned int m;
    for (; Del_50ms > 0; Del_50ms--)
        for (m = 6245; m > 0; m--);
}

void Delay_1ms(unsigned int Del_1ms)
{
    unsigned char j;
    while (Del_1ms--)
    {
        for (j = 0; j < 123; j++);
    }
}

// 坐标设置

void OLED_Set_Pos(unsigned char x, unsigned char y)
{
    OLED_WR_Byte(0xb0 + y, OLED_CMD);
    OLED_WR_Byte(((x & 0xf0) >> 4) | 0x10, OLED_CMD);
    OLED_WR_Byte((x & 0x0f), OLED_CMD);
}
// 开启OLED显示
void OLED_Display_On(void)
{
    OLED_WR_Byte(0X8D, OLED_CMD); // SET DCDC命令
    OLED_WR_Byte(0X14, OLED_CMD); // DCDC ON
    OLED_WR_Byte(0XAF, OLED_CMD); // DISPLAY ON
}
// 关闭OLED显示
void OLED_Display_Off(void)
{
    OLED_WR_Byte(0X8D, OLED_CMD); // SET DCDC命令
    OLED_WR_Byte(0X10, OLED_CMD); // DCDC OFF
    OLED_WR_Byte(0XAE, OLED_CMD); // DISPLAY OFF
}

// 清屏函数,清完屏,整个屏幕是黑色的!和没点亮一样!!!
void OLED_Clear(void)
{
    u8 i, n;
    for (i = 0; i < 8; i++)
    {
        OLED_WR_Byte(0xb0 + i, OLED_CMD); // 设置页地址（0~7）
        OLED_WR_Byte(0x00, OLED_CMD);     // 设置显示位置—列低地址
        OLED_WR_Byte(0x10, OLED_CMD);     // 设置显示位置—列高地址
        for (n = 0; n < 128; n++)
            OLED_WR_Byte(0, OLED_DATA);
    } // 更新显示
}

void OLED_On(void)
{
    u8 i, n;
    for (i = 0; i < 8; i++)
    {
        OLED_WR_Byte(0xb0 + i, OLED_CMD); // 设置页地址（0~7）
        OLED_WR_Byte(0x00, OLED_CMD);     // 设置显示位置—列低地址
        OLED_WR_Byte(0x10, OLED_CMD);     // 设置显示位置—列高地址
        for (n = 0; n < 128; n++)
            OLED_WR_Byte(1, OLED_DATA);
    } // 更新显示
}
// 在指定位置显示一个字符,包括部分字符
// x:0~127
// y:0~63
// mode:0,反白显示;1,正常显示
// size:选择字体 16/12
void OLED_ShowChar(u8 x, u8 y, u8 chr, u8 Char_Size)
{
    unsigned char c = 0, i = 0;
    c = chr - ' '; // 得到偏移后的值
    if (x > Max_Column - 1)
    {
        x = 0;
        y = y + 2;
    }
    if (Char_Size == 16)
    {
        OLED_Set_Pos(x, y);
        for (i = 0; i < 8; i++)
            OLED_WR_Byte(F8X16[c * 16 + i], OLED_DATA);
        OLED_Set_Pos(x, y + 1);
        for (i = 0; i < 8; i++)
            OLED_WR_Byte(F8X16[c * 16 + i + 8], OLED_DATA);
    }
    else
    {
        OLED_Set_Pos(x, y);
        for (i = 0; i < 6; i++)
            OLED_WR_Byte(F6x8[c][i], OLED_DATA);
    }
}
// m^n函数
u32 oled_pow(u8 m, u8 n)
{
    u32 result = 1;
    while (n--)
        result *= m;
    return result;
}
// 显示2个数字
// x,y :起点坐标
// len :数字的位数
// size:字体大小
// mode:模式	0,填充模式;1,叠加模式
// num:数值(0~4294967295);
void OLED_ShowNum(u8 x, u8 y, u32 num, u8 len, u8 size2)
{
    u8 t, temp;
    u8 enshow = 0;
    for (t = 0; t < len; t++)
    {
        temp = (num / oled_pow(10, len - t - 1)) % 10;
        if (enshow == 0 && t < (len - 1))
        {
            if (temp == 0)
            {
                OLED_ShowChar(x + (size2 / 2) * t, y, ' ', size2);
                continue;
            }
            else
                enshow = 1;
        }
        OLED_ShowChar(x + (size2 / 2) * t, y, temp + '0', size2);
    }
}
// 显示一个字符号串
void OLED_ShowString(u8 x, u8 y, u8 *chr, u8 Char_Size)
{
    unsigned char j = 0;
    while (chr[j] != '\0')
    {
        OLED_ShowChar(x, y, chr[j], Char_Size);
        x += 8;
        if (x > 120)
        {
            x = 0;
            y += 2;
        }
        j++;
    }
}
// 显示汉字
void OLED_ShowCHinese(u8 x, u8 y, u8 no)
{
    u8 t, adder = 0;
    OLED_Set_Pos(x, y);
    for (t = 0; t < 16; t++)
    {
        OLED_WR_Byte(Hzk[2 * no][t], OLED_DATA);
        adder += 1;
    }
    OLED_Set_Pos(x, y + 1);
    for (t = 0; t < 16; t++)
    {
        OLED_WR_Byte(Hzk[2 * no + 1][t], OLED_DATA);
        adder += 1;
    }
}
/***********功能描述：显示显示BMP图片128×64起始点坐标(x,y),x的范围0～127，y为页的范围0～7*****************/
void OLED_DrawBMP(unsigned char x0, unsigned char y0, unsigned char x1, unsigned char y1, unsigned char BMP[])
{
    unsigned int j = 0;
    unsigned char x, y;
    if (y1 % 8 == 0)
        y = y1 / 8;
    else
        y = y1 / 8 + 1;
    for (y = y0; y < y1; y++)
    {
        OLED_Set_Pos(x0, y);
        for (x = x0; x < x1; x++)
        {
            OLED_WR_Byte(BMP[j++], OLED_DATA);
        }
    }
}

// 初始化SSD1306
void OLED_Init(void)
{
    IIC_Init();
    Delay_ms(800);
    OLED_WR_Byte(0xAE, OLED_CMD); // Display off
    OLED_WR_Byte(0x00, OLED_CMD); // set low column address
    OLED_WR_Byte(0x10, OLED_CMD); // set high column address
    OLED_WR_Byte(0x40, OLED_CMD); // set start line address
    OLED_WR_Byte(0xB0, OLED_CMD); // set page address
    OLED_WR_Byte(0x81, OLED_CMD); // contract control
    OLED_WR_Byte(0xFF, OLED_CMD); // 128
    OLED_WR_Byte(0xA1, OLED_CMD); // set segment remap
    OLED_WR_Byte(0xA6, OLED_CMD); // normal / reverse
    OLED_WR_Byte(0xA8, OLED_CMD); // set multiplex ratio(1 to 64)
    OLED_WR_Byte(0x3F, OLED_CMD); // 1/32 duty
    OLED_WR_Byte(0xC8, OLED_CMD); // Com scan direction
    OLED_WR_Byte(0xD3, OLED_CMD); // Set display offset
    OLED_WR_Byte(0x00, OLED_CMD);

    OLED_WR_Byte(0xD5, OLED_CMD); // set osc division
    OLED_WR_Byte(0x80, OLED_CMD); //

    OLED_WR_Byte(0xD8, OLED_CMD); // set area color mode off
    OLED_WR_Byte(0x05, OLED_CMD); //

    OLED_WR_Byte(0xD9, OLED_CMD); // Set Pre-Charge Period
    OLED_WR_Byte(0xF1, OLED_CMD); //

    OLED_WR_Byte(0xDA, OLED_CMD); // set com pin configuartion
    OLED_WR_Byte(0x12, OLED_CMD); //

    OLED_WR_Byte(0xDB, OLED_CMD); // set Vcomh
    OLED_WR_Byte(0x30, OLED_CMD); //

    OLED_WR_Byte(0x8D, OLED_CMD); // set charge pump enable
    OLED_WR_Byte(0x14, OLED_CMD);

    OLED_WR_Byte(0xAF, OLED_CMD); // turn on oled panel
}