lcm1602.c

温度jyt7it软问题个人托人Greg尔过热

#include <reg52.h>

/*
定义Lcm1602的接线方式
RS:		P2.0
RW:		P2.1
E:		P2.2
D0:		P0.0
D1:		P0.1
D2:		P0.2
D3:		P0.3
D4:		P0.4
D5:		P0.5
D6:		P0.6
D7:		P0.7
*/

sbit LCM1602RS	= P2^0;  
sbit LCM1602RW	= P2^1;  
sbit LCM1602E	= P2^2;  
				   
/*定义1602的数据模式*/
#define LCM1602_8BIT_MODE

/*在lpc2106下移植成功*/
/*1602 IO定义*/
//1602 RS脚 PA12
#define LCM1602_PIN_RS			(0)
//1602 RW脚 PA13
#define LCM1602_PIN_RW			(1)
//1602 E脚  PA14
#define LCM1602_PIN_E			(2)
//1602 D0
#define LCM1602_PIN_D0			(0)
//1602 D1
#define LCM1602_PIN_D1			(1)
//1602 D2
#define LCM1602_PIN_D2			(2)
//1602 D3
#define LCM1602_PIN_D3			(3)
//1602 D4
#define LCM1602_PIN_D4			(4)
//1602 D5
#define LCM1602_PIN_D5			(5)
//1602 D6
#define LCM1602_PIN_D6			(6)
//1602 D7
#define LCM1602_PIN_D7			(7)

/*设置RS为输出*/
#define LCM1602_RS_OUT			
/*设置RS低*/
#define LCM1602_RS_LOW			(LCM1602RS = 0)
/*设置RS高*/
#define LCM1602_RS_HIGH			(LCM1602RS = 1)
/*设置RW为输出*/
#define LCM1602_RW_OUT			
/*设置RW低*/
#define LCM1602_RW_LOW			(LCM1602RW = 0)
/*设置RW高*/
#define LCM1602_RW_HIGH			(LCM1602RW = 1)
/*设置E为输出*/
#define LCM1602_E_OUT			
/*设置E低*/
#define LCM1602_E_LOW			(LCM1602E = 0)
/*设置E高*/
#define LCM1602_E_HIGH			(LCM1602E = 1)

//8Bit模式操作
#ifdef LCM1602_8BIT_MODE
//设置DATA为输出
#define LCM1602_DATA_OUT		
//设置DATA为输入
#define LCM1602_DATA_IN			
//获得DATA
#define LCM1602_GET_DATA		(P1)
//清除数据
#define LCM1602_CLEAR_DATA		(LCM1602_GET_DATA = 0x00)
//设置DATA
#define LCM1602_SET_DATA(x)		(LCM1602_GET_DATA = (x))
#endif

//4Bit模式操作
#ifdef LCM1602_4BIT_MODE
#endif

/***********************LCD1602地址相关******************************/
// 第一行DDRAM起始地址 
#define LCM1602_LINE1_ADDR		(0x80 + 0x00)
// 第二行DDRAM起始地址
#define LCM1602_LINE2_ADDR		(0x80 + 0x40)
// 第一行
#define LCM1602_LINE1			(0)
// 第二行
#define LCM1602_LINE2			(1)
// 每行的最大字符长度
#define LCM1602_LINE_LENGTH		(16)
//用于检测LCM状态字中的Busy标识
#define LCM1602_BUSY			(1 << 7)
//显示清屏。数据指针清零；所有显示清零
//#define LCM1602_		(0x01)
//显示回车。数据指针清零
//#define LCM1602_		(0x02)

/*设置Lcm1602 RS脚状态，0设置低电平；非0设置高电平*/
static void Lcm1602Rs(unsigned char uchStatus);
/*设置Lcm1602 RW脚状态，0设置低电平；非0设置高电平*/
static void Lcm1602Rw(unsigned char uchStatus);
/*设置Lcm1602 E脚状态，0设置低电平；非0设置高电平*/
static void Lcm1602E(unsigned char uchStatus);
/*获得Lcm1602返回的数据*/
static unsigned int Lcm1602GetData(void);
/*向Lcm1602发送数据*/
static void Lcm1602SetData(unsigned char uchData);
/*检查Lcm1602是否读写使能*/
static unsigned char Lcm1602CheckBusy(void);
/*向Lcm1602发送指令*/
static void Lcm1602Command(unsigned char uchInstruction, unsigned char uchBusy);
/*向Lcm1602发送数据*/
static void Lcm1602Data(unsigned char uchData);

extern void delay_ms(unsigned int uiTime);

/*设置1602 RS脚状态*/
void Lcm1602Rs(unsigned char uchStatus)
{
	if (0 == uchStatus)
	{
		LCM1602_RS_LOW;
	}
	else
	{
		LCM1602_RS_HIGH;
	}
}

/*设置1602 RW脚状态*/
void Lcm1602Rw(unsigned char uchStatus)
{
	if (0 == uchStatus)
	{
		LCM1602_RW_LOW;
	}
	else
	{
		LCM1602_RW_HIGH;
	}
}

/*设置1602 E脚状态*/
void Lcm1602E(unsigned char uchStatus)
{
	if (0 == uchStatus)
	{
		LCM1602_E_LOW;
	}
	else
	{
		LCM1602_E_HIGH;
	}
}

/*获得1602数据*/
unsigned int Lcm1602GetData(void)
{
	unsigned int uiData;
	LCM1602_DATA_IN;
	uiData = LCM1602_GET_DATA;
	return uiData;
}

/*将数据写到1602*/
void Lcm1602SetData(unsigned char uchData)
{
	/*将IO设置为输出*/
	LCM1602_DATA_OUT;
	LCM1602_CLEAR_DATA;
	LCM1602_SET_DATA(uchData);
}

/*检查1602读写操作使能*/
unsigned char Lcm1602CheckBusy(void)
{
	unsigned int uiData;
	
	while (1)
	{
		Lcm1602Rs(0);
		Lcm1602Rw(1);
		Lcm1602E(1);
		/*判断STA7是否为0*/
		uiData = Lcm1602GetData();
		if (0 == (uiData & LCM1602_BUSY))
		{
			break;
		}
		Lcm1602E(0);
	}
	
	return uiData;
}

/*写1602指令*/
void Lcm1602Command(unsigned char uchInstruction, unsigned char uchBusy)
{
	if (0 != uchBusy)
	{
		Lcm1602CheckBusy();
	}
	
	Lcm1602Rs(0);
	Lcm1602Rw(0);
	Lcm1602SetData(uchInstruction);
	Lcm1602E(1);
	delay_ms(1);
	Lcm1602E(0);
}

/*写1602数据*/
void Lcm1602Data(unsigned char uchData)
{
	Lcm1602CheckBusy();
	Lcm1602Rs(1);
	Lcm1602Rw(0);
	Lcm1602SetData(uchData);
	Lcm1602E(1);
	delay_ms(1);
	Lcm1602E(0);
}

/*初始化1602*/
void Lcm1602Init(void)
{
	LCM1602_RS_OUT;
	LCM1602_RW_OUT;
	LCM1602_E_OUT;

	delay_ms(15);
	//三次显示模式设置，不检测忙信号
	Lcm1602Command(0x38, 0);
	delay_ms(5);
	Lcm1602Command(0x38, 0);
	delay_ms(5);
	Lcm1602Command(0x38, 0);
	delay_ms(5);
	//显示模式设置,开始要求每次检测忙信号
	Lcm1602Command(0x38, 1);
	//关闭显示
	Lcm1602Command(0x08, 1);
	//显示清屏
	Lcm1602Command(0x01, 1);
	//显示光标移动设置
	Lcm1602Command(0x06, 1);
	//显示开及光标设置
	Lcm1602Command(0x0c, 1);	
}

#if 0
void Lcm1602Clear(void)
{
	Lcm1602Command(0x01, 1);
}

/***************************************************** 
函 数 名：void DisplayChar(unsigned char x, unsigned char y, unsigned char uchData)
功   能：按指定坐标中写入数据
说   明：X-横坐标,Y-纵坐标,DData为ASCII值
入口参数：x, y, uchData
返 回 值：无 
*****************************************************/
void DisplayChar(unsigned char x, unsigned char y, unsigned char uchData)
{
	y &= 0x01;
	x &= 0x0F;         // 限制X不能大于15，Y不能大于1
	if (y)
	{
		x |=LCM1602_LINE2_ADDR; // 当要显示第二行时地址码:0xc0
	}
	x |= LCM1602_LINE1_ADDR;     // 第一行的地址码:0x80
	Lcm1602Command(x, 1);
	Lcm1602Data(uchData);
}
#endif

/***************************************************** 
函 数 名：void DisplayString(unsigned char x,unsigned char y,unsigned char *puszData)
功   能：向指定坐标中写入字符串(在LCD1602中使用此函数)
说   明：X-横坐标,Y-纵坐标
入口参数：x, y, *puszData 
返 回 值：无 
*****************************************************/
void DisplayString(unsigned char x,unsigned char y,unsigned char *puszData)
{
	if (LCM1602_LINE1 == y)                       // 判断是否写入第1行
	{
		if (x < LCM1602_LINE_LENGTH)                 // 写入位数
		{
			Lcm1602Command(LCM1602_LINE1_ADDR + x, 1);       // 写入第1行地址
			for (; x < LCM1602_LINE_LENGTH && *puszData != '\0'; x++)
			{
				Lcm1602Data(*(puszData++));         // 写入数据
			}
			if(*puszData!='\0')                 // 判断数据是否写完
			{
				x=0;                       // 没写完写入第2行
				y=LCM1602_LINE2; 
			}
		}
	}
  
	if (LCM1602_LINE2 == y)                       // 判断是否写入第2行
	{
		Lcm1602Command(LCM1602_LINE2_ADDR + x, 1);         // 写入第2行地址
		for (; x < LCM1602_LINE_LENGTH && *puszData != '\0'; x++)     // 判断数据是否写完
		{
			Lcm1602Data(*(puszData++));           // 写入数据
		}
	}
}