mega128/DS12C887的驅(qū)動(dòng)程序

畫(huà)了一個(gè)128的板子，正在調(diào)試程序，先和大家分享一下12C887的程序，能完成時(shí)鐘的基本功能，如需要增加其他功能，更是方便添加
歡迎指正！??！其他程序正在出爐中。

#include
#include
#include "lcd.h"
typedef unsigned char uchar;
typedef unsigned int uint;

void port_init(void)
{
?//訪(fǎng)問(wèn)外部ram的總線(xiàn)端口
?PORTA = 0x00;
?DDRA? = 0x00;
?PORTC = 0x00;
?DDRC? = 0xFF;
}
??
void check_busy(uchar cs)??????????????
{
? uchar temp;
? while(temp)?????????
?? {
???? if(cs)
??????? temp=R_staus&0X80;?????????????? //將忙狀態(tài)讀到temp中進(jìn)行確定
? else
???? temp=L_staus&0X80;
?}
}

void lcdcommand(uchar cs,uchar com)
{
?if(cs)
?? {?
??? check_busy(1);
??? R_command=com;
?? }
? else
?? { ?
??? check_busy(0);
??? L_command=com;
?? }
}

/*************************向LCD寫(xiě)數(shù)據(jù)函數(shù)*************************/

void lcddatas(char cs,uchar dd)
{?
?if(cs)
?? {
??? check_busy(1);
??? R_data=dd;
?? }
?else
?? {
??? check_busy(0);
??? L_data=dd;
??? }
}

/**************************** LCD清屏函數(shù)*******************************/

void LCD_Clean(void)
{
?unsigned char x,y;? ?
?for(x=0xb8;x<=0xbf;x++)???????????????????????????????? //一頁(yè)一頁(yè)的寫(xiě)
?? {?
???? lcdcommand(0,x);
???? lcdcommand(1,x);??????????????????????????????????? //設(shè)定X方向地址，X地址不能自增。要靠程序加
???? lcdcommand(0,LCD_Y);??????????????????????????????? //設(shè)置Y的初始地址，Y可自加
???? lcdcommand(1,LCD_Y);
???? for(y=0;y<64;y++)
?????? {? ?
???????? lcddatas(0,0x00);
???????? lcddatas(1,0x00);?????????????????????????????? //Y地址可以自增
?????? }???????
??? }
}
????????????????????????????????????????
void LCD_Init(void)???????????????????? //LCD初始化子函數(shù)
{
? /*首先關(guān)閉12864的顯示*/
? check_busy(0);??????????????????????? //LCD左半屏正在工作，等待......
? L_command=LCD_OFF;??????????????????? //先關(guān)閉LCD左半屏的顯示
? check_busy(1);??????????????????????? //LCD右半屏正在工作，等待......
? R_command=LCD_OFF;??????????????????? //先關(guān)閉LCD右半屏的顯示
?
? /*開(kāi)啟12864的顯示*/
? check_busy(0);
? L_command=LCD_ON;???????????????????? //打開(kāi)LCD左半屏的顯示
? check_busy(1);
? R_command=LCD_ON;???????????????????? //打開(kāi)LCD右半屏的顯示
?
? /*設(shè)置LCD顯示的起始行*/
? check_busy(0);
? L_command=LCD_X;????????????????????? //LCD左半屏起始行為0
? check_busy(1);
? R_command=LCD_X;????????????????????? //LCD右半屏起始行為0
}

void init_devices(void)
{
?XMCRA = 0x00;????????????????????????? //外部存儲(chǔ)器控制
?XMCRB = 0x00; //外存儲(chǔ)高位地址屏蔽，釋放端口C
?port_init();
?MCUCR = 0x80;????????????????????????? //外部SRAM使能
}