TG12232 stm32f103并口驱动

TG12232 是一个 122x32 像素的图形液晶显示屏，可以通过 STM32F103 的并口来进行驱动。下面是一个简单的 STM32F103 并口驱动 TG12232 的示例代码：

#include "stm32f10x.h"
#include "tg12232.h"

#define TG12232_PORT    GPIOA
#define TG12232_PIN_RST GPIO_Pin_0
#define TG12232_PIN_CS  GPIO_Pin_1
#define TG12232_PIN_WR  GPIO_Pin_2
#define TG12232_PIN_RD  GPIO_Pin_3
#define TG12232_PIN_DAT GPIO_Pin_4

void TG12232_Init(void)
{
    RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE);

    GPIO_InitTypeDef GPIO_InitStructure;
    GPIO_InitStructure.GPIO_Pin = TG12232_PIN_RST | TG12232_PIN_CS | TG12232_PIN_WR | TG12232_PIN_RD | TG12232_PIN_DAT;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_10MHz;
    GPIO_Init(TG12232_PORT, &GPIO_InitStructure);

    TG12232_RST(1);
    TG12232_CS(1);
    TG12232_WR(1);
    TG12232_RD(1);
}

void TG12232_WriteByte(uint8_t data)
{
    TG12232_DAT(data);
    TG12232_WR(0);
    TG12232_WR(1);
}

void TG12232_WriteCmd(uint8_t cmd)
{
    TG12232_CS(0);
    TG12232_WriteByte(cmd);
    TG12232_CS(1);
}

void TG12232_SetPos(uint8_t x, uint8_t y)
{
    TG12232_WriteCmd(0xB0 | y);
    TG12232_WriteCmd((x & 0xF0) >> 4);
    TG12232_WriteCmd(0x10 | (x & 0x0F));
}

void TG12232_Clear(void)
{
    for (uint8_t y = 0; y < 4; y++)
    {
        TG12232_SetPos(0, y);
        for (uint8_t x = 0; x < 61; x++)
        {
            TG12232_WriteCmd(0x00);
            TG12232_WriteCmd(0x00);
        }
    }
}

void TG12232_DrawPixel(uint8_t x, uint8_t y, uint8_t color)
{
    TG12232_SetPos(x, y / 8);
    TG12232_WriteCmd(0x10 | (x & 0x0F));
    TG12232_WriteCmd(0x00);

    uint8_t data = 0x80 >> (y % 8);
    if (color == 0)
    {
        data = ~data;
    }
    TG12232_WriteCmd(data);
    TG12232_WriteCmd(data);
}

void TG12232_DrawLine(uint8_t x1, uint8_t y1, uint8_t x2, uint8_t y2, uint8_t color)
{
    int8_t dx = x2 - x1;
    int8_t dy = y2 - y1;
    int8_t stepx = 1, stepy = 1;

    if (dx < 0)
    {
        dx = -dx;
        stepx = -1;
    }
    if (dy < 0)
    {
        dy = -dy;
        stepy = -1;
    }

    int8_t x = x1, y = y1;
    TG12232_DrawPixel(x, y, color);

    if (dx > dy)
    {
        int8_t p = 2 * dy - dx;
        for (int8_t i = 0; i < dx; i++)
        {
            if (p < 0)
            {
                p += 2 * dy;
            }
            else
            {
                p += 2 * (dy - dx);
                y += stepy;
            }
            x += stepx;
            TG12232_DrawPixel(x, y, color);
        }
    }
    else
    {
        int8_t p = 2 * dx - dy;
        for (int8_t i = 0; i < dy; i++)
        {
            if (p < 0)
            {
                p += 2 * dx;
            }
            else
            {
                p += 2 * (dx - dy);
                x += stepx;
            }
            y += stepy;
            TG12232_DrawPixel(x, y, color);
        }
    }
}

void TG12232_DrawRect(uint8_t x1, uint8_t y1, uint8_t x2, uint8_t y2, uint8_t color)
{
    TG12232_DrawLine(x1, y1, x2, y1, color);
    TG12232_DrawLine(x1, y1, x1, y2, color);
    TG12232_DrawLine(x1, y2, x2, y2, color);
    TG12232_DrawLine(x2, y1, x2, y2, color);
}

void TG12232_DrawCircle(uint8_t x0, uint8_t y0, uint8_t r, uint8_t color)
{
    int8_t x = 0, y = r;
    int8_t d = 3 - 2 * r;
    while (x <= y)
    {
        TG12232_DrawPixel(x0 + x, y0 + y, color);
        TG12232_DrawPixel(x0 - x, y0 + y, color);
        TG12232_DrawPixel(x0 + x, y0 - y, color);
        TG12232_DrawPixel(x0 - x, y0 - y, color);
        TG12232_DrawPixel(x0 + y, y0 + x, color);
        TG12232_DrawPixel(x0 - y, y0 + x, color);
        TG12232_DrawPixel(x0 + y, y0 - x, color);
        TG12232_DrawPixel(x0 - y, y0 - x, color);
        if (d < 0)
        {
            d = d + 4 * x + 6;
        }
        else
        {
            d = d + 4 * (x - y) + 10;
            y--;
        }
        x++;
    }
}

在这个示例代码中，TG12232_Init() 函数用于初始化 TG12232 显示屏的并口引脚，TG12232_WriteByte() 函数用于写入一个字节的数据到 TG12232 显示屏，TG12232_WriteCmd() 函数用于写入一个命令到 TG12232 显示屏，TG12232_SetPos() 函数用于设置 TG12232 显示屏的写入位置，TG12232_Clear() 函数用于清空 TG12232 显示屏的内容，TG12232_DrawPixel() 函数用于在 TG12232 显示屏上绘制一个像素点，TG12232_DrawLine() 函数用于在 TG12232 显示屏上绘制一条直线，TG12232_DrawRect() 函数用于在 TG12232 显示屏上绘制一个矩形，TG12232_DrawCircle() 函数用于在 TG12232 显示屏上绘制一个圆形。

你可以根据自己的需要修改这个示例代码来驱动 TG12232 显示屏。