system.c

MzT24_Driver_C8051彩屏液晶驱动

//====================================================================//
//文件：System.c
//描述：系统初始化程序集
//备注：包括上电后的时钟初始化、端口、功能模块等
//作者：xinqiang 2006 08 12     Mz Designed   小丑
//====================================================================//
#include "C8051F020.h"
#include "intrins.h"			//包含此头文件可直接操作内核的寄存器以及一些定义好的宏


sbit LCD_ON = P1^6;	 					//LCD背光灯控制开关

//===================================================//
//程序：void System_Initial(void)
//描述：串行口初始化程序，初始化波特率、模式等
//参数：无
//返回：无
//Note:  Edit by Mz      xinqiang zhang（小丑）
//Date:  2006 08 10      beijing
//===================================================//
void System_Initial(void)
{
	unsigned char i;                              // delay counter
	//看门狗初始化代码
	WDTCN = 0xde;                       // disable watchdog timer
   	WDTCN = 0xad;
	//系统时钟初始化代码
   	OSCXCN = 0x67;                      // start external oscillator with
                                        // 25MHz crystal
   	for (i=0; i < 255; i++) _nop_();    // XTLVLD blanking interval (>1ms)

   	while (!(OSCXCN & 0x80)) ;          // Wait for crystal osc. to settle

   	OSCICN = 0x88;                      // select external oscillator as SYSCLK
                                        // source and enable missing clock
                                        // detector//	*/
	//统端口初始化代码
//	P4 = P4&0xfb;
	EMI0CF = 0x38;						//外部总线接口的模式:利用P4~P7,带块选择
										//非复用方式  ALE为2个Systemclock
  	EMI0TC = 0xff;//a;//6;// 0xdc;		//驱动控制MT22G06LCD时，要注意总线时序的配置，否则无法正常驱动LCD

	XBR0    = 0x00;                     // Enable UART0 RX/TX Port
   	XBR1    = 0x00;
	XBR2 &= 0x7f;
   	XBR2 |= 0x40;                     	// Enable crossbar and weak pull-ups
   	P0MDOUT = 0x01;                   	// enable TX0 as a push-pull output
//	P0 = 0x08;
	P1MDOUT = 0xff;
	P1 = 0x00;
	P2MDOUT = 0xff;
	P2 = 0xff;
  	P3MDOUT = 0xff;                    	// 
	P3 = 0xff;
///	LCD_ON  = 0;
//	LCD_ON  = 1;
//	P74OUT |= 0xff;

	//其它的设置代码
}