stm32f103并口驱动HG12232

HG12232是一种128x64点阵图形液晶显示器，可以使用STM32F103的并口驱动器连接。下面是一个基本的并口驱动程序，可以将其修改为适合您的应用程序。请注意，该代码仅提供参考。

#include "stm32f10x.h"
#include "delay.h"

#define LCD_DATA_PORT GPIOA
#define LCD_DATA_PIN GPIO_Pin_0|GPIO_Pin_1|GPIO_Pin_2|GPIO_Pin_3|\
                      GPIO_Pin_4|GPIO_Pin_5|GPIO_Pin_6|GPIO_Pin_7
#define LCD_CMD_PORT GPIOB
#define LCD_CMD_PIN_RS GPIO_Pin_8
#define LCD_CMD_PIN_RW GPIO_Pin_9
#define LCD_CMD_PIN_E  GPIO_Pin_10

void LcdWriteCmd(unsigned char cmd)
{
    GPIO_ResetBits(LCD_CMD_PORT, LCD_CMD_PIN_RS);
    GPIO_ResetBits(LCD_CMD_PORT, LCD_CMD_PIN_RW);
    GPIO_SetBits(LCD_CMD_PORT, LCD_CMD_PIN_E);
    GPIO_Write(LCD_DATA_PORT, cmd);
    Delay_us(1);
    GPIO_ResetBits(LCD_CMD_PORT, LCD_CMD_PIN_E);
    Delay_us(1);
}

void LcdWriteData(unsigned char data)
{
    GPIO_SetBits(LCD_CMD_PORT, LCD_CMD_PIN_RS);
    GPIO_ResetBits(LCD_CMD_PORT, LCD_CMD_PIN_RW);
    GPIO_SetBits(LCD_CMD_PORT, LCD_CMD_PIN_E);
    GPIO_Write(LCD_DATA_PORT, data);
    Delay_us(1);
    GPIO_ResetBits(LCD_CMD_PORT, LCD_CMD_PIN_E);
    Delay_us(1);
}

void LcdInit(void)
{
    RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA|RCC_APB2Periph_GPIOB, ENABLE);
    GPIO_InitTypeDef GPIO_InitStructure;
    GPIO_InitStructure.GPIO_Pin = LCD_DATA_PIN;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
    GPIO_Init(LCD_DATA_PORT, &GPIO_InitStructure);
    GPIO_InitStructure.GPIO_Pin = LCD_CMD_PIN_RS|LCD_CMD_PIN_RW|LCD_CMD_PIN_E;
    GPIO_Init(LCD_CMD_PORT, &GPIO_InitStructure);
    Delay_ms(50);
    LcdWriteCmd(0x3f);
    Delay_ms(5);
    LcdWriteCmd(0xc0);
    Delay_ms(5);
    LcdWriteCmd(0x01);
    Delay_ms(5);
}

void LcdClear(void)
{
    LcdWriteCmd(0x01);
    Delay_ms(5);
}

void LcdSetPos(unsigned char x, unsigned char y)
{
    unsigned char pos;
    if(y==0) pos=x;
    else pos=x+0x40;
    LcdWriteCmd(pos|0x80);
}

void LcdDrawPixel(unsigned char x, unsigned char y, unsigned char color)
{
    LcdSetPos(x, y/8);
    LcdWriteData(1<<(y%8));
}

void LcdDrawLine(unsigned char x1, unsigned char y1, unsigned char x2, unsigned char y2, unsigned char color)
{
    int dx,dy,e;
    dx=x2-x1;
    dy=y2-y1;
    if(dx>=0)
    {
        if(dy>=0)
        {
            if(dx>=dy)
            {
                e=dy-dx/2;
                while(x1<=x2)
                {
                    LcdDrawPixel(x1, y1, color);
                    if(e>0){y1+=1;e-=dx;}
                    x1+=1;
                    e+=dy;
                }
            }
            else
            {
                e=dx-dy/2;
                while(y1<=y2)
                {
                    LcdDrawPixel(x1, y1, color);
                    if(e>0){x1+=1;e-=dy;}
                    y1+=1;
                    e+=dx;
                }
            }
        }
        else
        {
            dy=-dy;
            if(dx>=dy)
            {
                e=dy-dx/2;
                while(x1<=x2)
                {
                    LcdDrawPixel(x1, y1, color);
                    if(e>0){y1-=1;e-=dx;}
                    x1+=1;
                    e+=dy;
                }
            }
            else
            {
                e=dx-dy/2;
                while(y1>=y2)
                {
                    LcdDrawPixel(x1, y1, color);
                    if(e>0){x1+=1;e-=dy;}
                    y1-=1;
                    e+=dx;
                }
            }
        }
    }
    else
    {
        dx=-dx;
        if(dy>=0)
        {
            if(dx>=dy)
            {
                e=dy-dx/2;
                while(x1>=x2)
                {
                    LcdDrawPixel(x1, y1, color);
                    if(e>0){y1+=1;e-=dx;}
                    x1-=1;
                    e+=dy;
                }
            }
            else
            {
                e=dx-dy/2;
                while(y1<=y2)
                {
                    LcdDrawPixel(x1, y1, color);
                    if(e>0){x1-=1;e-=dy;}
                    y1+=1;
                    e+=dx;
                }
            }
        }
        else
        {
            dy=-dy;
            if(dx>=dy)
            {
                e=dy-dx/2;
                while(x1>=x2)
                {
                    LcdDrawPixel(x1, y1, color);
                    if(e>0){y1-=1;e-=dx;}
                    x1-=1;
                    e+=dy;
                }
            }
            else
            {
                e=dx-dy/2;
                while(y1>=y2)
                {
                    LcdDrawPixel(x1, y1, color);
                    if(e>0){x1-=1;e-=dy;}
                    y1-=1;
                    e+=dx;
                }
            }
        }
    }
}

void LcdDrawRect(unsigned char x1, unsigned char y1, unsigned char x2, unsigned char y2, unsigned char color)
{
    LcdDrawLine(x1, y1, x2, y1, color);
    LcdDrawLine(x1, y1, x1, y2, color);
    LcdDrawLine(x2, y1, x2, y2, color);
    LcdDrawLine(x1, y2, x2, y2, color);
}

void LcdDrawCircle(unsigned char x, unsigned char y, unsigned char r, unsigned char color)
{
    int a,b,num;
    a=0;b=r;num=0;
    while(1)
    {
        LcdDrawPixel(x+b, y+a, color);
        LcdDrawPixel(x-a, y+b, color);
        LcdDrawPixel(x-b, y-a, color);
        LcdDrawPixel(x+a, y-b, color);
        num+=1;
        a+=num;
        if(2*a>=3*b) num-=1;
        b+=num;
        if(a>r) break;
    }
}

void LcdDrawBitmap(unsigned char x, unsigned char y, unsigned char *bitmap, unsigned char w, unsigned char h)
{
    unsigned char i,j;
    for(j=0; j<h/8; j++)
    {
        for(i=0; i<w; i++)
        {
            LcdSetPos(x+i, y+j);
            LcdWriteData(bitmap[j*w+i]);
        }
    }
}

int main(void)
{
    LcdInit();
    LcdClear();
    LcdDrawRect(0, 0, 127, 63, 1);
    LcdDrawLine(0, 0, 127, 63, 1);
    LcdDrawLine(0, 63, 127, 0, 1);
    LcdDrawCircle(63, 31, 20, 1);
    unsigned char bitmap[] = {0x3C,0x42,0x95,0xA1,0xA1,0x95,0x42,0x3C};
    LcdDrawBitmap(64, 24, bitmap, 8, 8);
    while(1);
}

在此示例中，我们使用了STM32F103的GPIOA和GPIOB端口来控制HG12232的并口。我们使用了8位数据总线，分别连接到LCD_DATA_PORT的GPIO_Pin_0至GPIO_Pin_7引脚上。我们还使用了LCD_CMD_PORT的GPIO_Pin_8、GPIO_Pin_9和GPIO_Pin_10引脚来控制RS、RW和E信号。我们使用了一个基本的初始化函数来初始化LCD，并且提供了一些简单的绘图函数，如清除LCD、设置像素、绘制线、绘制矩形、绘制圆形和绘制位图。这些函数可以根据需要进行修改和扩展，以实现更复杂的绘图功能。