用iar for avr 实现12864液晶显示屏驱动移植源代码

以下是一个基于 IAR for AVR 的 12864 液晶显示屏驱动移植源代码，仅供参考：

#include "lcd12864.h"
#include <iom128.h>

#define LCD_DATA_PORT PORTA
#define LCD_DATA_DDR DDRA
#define LCD_CTRL_PORT PORTC
#define LCD_CTRL_DDR DDRC
#define LCD_RS_PIN PC0
#define LCD_RW_PIN PC1
#define LCD_EN_PIN PC2

void LCD_Init()
{
    LCD_CTRL_DDR |= (1 << LCD_RS_PIN) | (1 << LCD_RW_PIN) | (1 << LCD_EN_PIN);
    LCD_DATA_DDR = 0xFF;
    LCD_CTRL_PORT &= ~(1 << LCD_RS_PIN);
    LCD_CTRL_PORT &= ~(1 << LCD_RW_PIN);
    LCD_CTRL_PORT &= ~(1 << LCD_EN_PIN);

    LCD_WriteCommand(0x30);
    delay_us(4500);
    LCD_WriteCommand(0x30);
    delay_us(4500);
    LCD_WriteCommand(0x30);
    delay_us(150);

    LCD_WriteCommand(0x38);
    LCD_WriteCommand(0x08);
    LCD_WriteCommand(0x01);
    LCD_WriteCommand(0x06);
    LCD_WriteCommand(0x0C);
}

void LCD_WriteCommand(unsigned char cmd)
{
    LCD_CTRL_PORT &= ~(1 << LCD_RS_PIN);
    LCD_CTRL_PORT &= ~(1 << LCD_RW_PIN);
    LCD_CTRL_PORT |= (1 << LCD_EN_PIN);
    LCD_DATA_PORT = cmd;
    delay_us(1);
    LCD_CTRL_PORT &= ~(1 << LCD_EN_PIN);
    delay_us(10);
}

void LCD_WriteData(unsigned char data)
{
    LCD_CTRL_PORT |= (1 << LCD_RS_PIN);
    LCD_CTRL_PORT &= ~(1 << LCD_RW_PIN);
    LCD_CTRL_PORT |= (1 << LCD_EN_PIN);
    LCD_DATA_PORT = data;
    delay_us(1);
    LCD_CTRL_PORT &= ~(1 << LCD_EN_PIN);
    delay_us(10);
}

void LCD_Clear()
{
    LCD_WriteCommand(0x01);
}

void LCD_SetCursor(unsigned char row, unsigned char col)
{
    unsigned char address = (row == 0 ? 0x00 : 0x40) + col;
    LCD_WriteCommand(0x80 | address);
}

void LCD_WriteString(char* str)
{
    while(*str)
    {
        LCD_WriteData(*str++);
    }
}

void delay_us(unsigned int n)
{
    for(int i = 0; i < n; i++)
    {
        for(int j = 0; j < 3; j++)
        {
            asm("nop");
        }
    }
}

在此基础上，你需要根据你的具体硬件连接情况进行适当的修改。