TI DSP驱动LCM1602问题求教

jxk122481 2014-10-31 09:06:34

现用TI的piccolo系列DSP驱动LCM1602显示，可总是没任何反应，什么字符都没有显示，以下是代码，有没有兄弟能指教一下的，非常感谢



#include "includes.h"



#define DELAY_MS(x) (DELAY_US((unsigned long)(x)*1000L))





#define D7	GpioDataRegs.GPADAT.bit.GPIO18



#define READ 1

#define WRITE 0



/*

#define D0_SET(x) if(x) {GpioDataRegs.GPASET.bit.GPIO8=1;} else {GpioDataRegs.GPACLEAR.bit.GPIO8=1;}

#define D1_SET(x) if(x) {GpioDataRegs.GPASET.bit.GPIO25=1;} else {GpioDataRegs.GPACLEAR.bit.GPIO25=1;}

#define D2_SET(x) if(x) {GpioDataRegs.GPASET.bit.GPIO27=1;} else {GpioDataRegs.GPACLEAR.bit.GPIO27=1;}

#define D3_SET(x) if(x) {GpioDataRegs.GPASET.bit.GPIO31=1;} else {GpioDataRegs.GPACLEAR.bit.GPIO31=1;}

#define D4_SET(x) if(x) {GpioDataRegs.GPBSET.bit.GPIO44=1;} else {GpioDataRegs.GPBCLEAR.bit.GPIO44=1;}

#define D5_SET(x) if(x) {GpioDataRegs.GPASET.bit.GPIO16=1;} else {GpioDataRegs.GPACLEAR.bit.GPIO16=1;}

#define D6_SET(x) if(x) {GpioDataRegs.GPASET.bit.GPIO17=1;} else {GpioDataRegs.GPACLEAR.bit.GPIO17=1;}

#define D7_SET(x) if(x) {GpioDataRegs.GPASET.bit.GPIO18=1;} else {GpioDataRegs.GPACLEAR.bit.GPIO18=1;}

*/





#define D0_SET(x) GpioDataRegs.GPADAT.bit.GPIO8=(x);

#define D1_SET(x) GpioDataRegs.GPADAT.bit.GPIO25=(x);

#define D2_SET(x) GpioDataRegs.GPADAT.bit.GPIO27=(x);

#define D3_SET(x) GpioDataRegs.GPADAT.bit.GPIO31=(x);

#define D4_SET(x) GpioDataRegs.GPBDAT.bit.GPIO44=(x);

#define D5_SET(x) GpioDataRegs.GPADAT.bit.GPIO16=(x);

#define D6_SET(x) GpioDataRegs.GPADAT.bit.GPIO17=(x);

#define D7_SET(x) GpioDataRegs.GPADAT.bit.GPIO18=(x);





#define E_SET(x) if(x) {GpioDataRegs.GPASET.bit.GPIO3=1;} else {GpioDataRegs.GPACLEAR.bit.GPIO3=1;}



#define RW_SET(x) if(x) {GpioDataRegs.GPASET.bit.GPIO6=1;} else {GpioDataRegs.GPACLEAR.bit.GPIO6=1;}



#define COMMAND 0

#define DATA 1

#define RS_SET(x) if(x) {GpioDataRegs.GPASET.bit.GPIO7=1;} else {GpioDataRegs.GPACLEAR.bit.GPIO7=1;}



void Gpio_R_W(Uint16 operation)

{

	EALLOW; 

	if(operation)

	{

		//read

		GpioCtrlRegs.GPADIR.bit.GPIO8	= 0;

		GpioCtrlRegs.GPADIR.bit.GPIO25	= 0;

		GpioCtrlRegs.GPADIR.bit.GPIO27	= 0;

		GpioCtrlRegs.GPADIR.bit.GPIO31	= 0;

		GpioCtrlRegs.GPBDIR.bit.GPIO44	= 0;

		GpioCtrlRegs.GPADIR.bit.GPIO16	= 0;

		GpioCtrlRegs.GPADIR.bit.GPIO17	= 0;

		GpioCtrlRegs.GPADIR.bit.GPIO18	= 0;

	}

	if(!operation)

	{

		//write

		GpioCtrlRegs.GPADIR.bit.GPIO8	= 1;

		GpioCtrlRegs.GPADIR.bit.GPIO25	= 1;

		GpioCtrlRegs.GPADIR.bit.GPIO27	= 1;

		GpioCtrlRegs.GPADIR.bit.GPIO31	= 1;

		GpioCtrlRegs.GPBDIR.bit.GPIO44	= 1;

		GpioCtrlRegs.GPADIR.bit.GPIO16	= 1;

		GpioCtrlRegs.GPADIR.bit.GPIO17	= 1;

		GpioCtrlRegs.GPADIR.bit.GPIO18	= 1;

	}

	EDIS;

}





void Dat2DB8(Uint8 data)

{

	Gpio_R_W(WRITE);

	D0_SET(data&0x0001);

	D1_SET((data>>1)&0x0001);

	D2_SET((data>>2)&0x0001);

	D3_SET((data>>3)&0x0001);

	D4_SET((data>>4)&0x0001);

	D5_SET((data>>5)&0x0001);

	D6_SET((data>>6)&0x0001);

	D7_SET((data>>7)&0x0001);

}



// mod==1 : write data

// mod==0 : write command

void LCD1602Write( Uint8 data, Uint8 mod )

{	

	Dat2DB8(data);



	RS_SET(mod);

	RW_SET(WRITE);

	DELAY_US(5L);

	E_SET(1);

	DELAY_US(10L);

	E_SET(0);

	

}



void LCD1602ReadBusy()

{

	Dat2DB8(0xff);

	RS_SET(COMMAND);

	RW_SET(READ);

	E_SET(1);

	Gpio_R_W(READ);

	while(D7);

	E_SET(0);

}



void LCDMoveTo(int16 y, int16 x)

{

	

}



void LCD1602Init()

{

	E_SET(0);

	RS_SET(DATA);

	RW_SET(READ);

	Dat2DB8(0x00ff);



	DELAY_MS(15);

	LCD1602Write(0x0038,COMMAND);

	DELAY_MS(5);

	LCD1602Write(0x0038,COMMAND);               

	DELAY_MS(5);

	LCD1602Write(0x0038,COMMAND);	// 设置12*2显示,5*8点阵,8位数据接口



	LCD1602ReadBusy();

	LCD1602Write(0x0038,COMMAND);



	LCD1602ReadBusy();

	LCD1602Write(0x0008,COMMAND);	// 关显示，不显示光标位置，光标不闪烁



	LCD1602ReadBusy();

	LCD1602Write(0x0001,COMMAND);	// 清除显示



	LCD1602ReadBusy();

	LCD1602Write(0x0006,COMMAND);	// 写一个字符指针自动加1



	LCD1602ReadBusy();

	LCD1602Write(0x000c,COMMAND);	// 开显示不显示光标



}



// y : row, x : column, c : character to display

void LCD1602DisplayChar( Uint8 y, Uint8 x, char c )

{         

	if( y ) // second line

	{        

		x += 0x40;

	}



	x += 0x80;



	LCD1602ReadBusy();

	LCD1602Write( x, COMMAND);	// cursor move to

	LCD1602ReadBusy();  

	LCD1602Write( c, DATA);		// write data

}



// y : row, x : column, c : string to display

void LCD1602DisplayStr( Uint8 y, Uint8 x, char str[] )

{      

	char *c = str;



	while( *c )

	{  

		LCD1602DisplayChar( y, x, *c );

		c++;

	}

}



void LCD1602BlinkCursor(Uint8 y, Uint8 x, Uint8 blink)

{

	if( y ) // second line

	{        

		x += 0x40;

	}



	x += 0x80;



	LCD1602Write( x, COMMAND);	// cursor move to  



	if ( blink )

	{

		LCD1602Write( 0x0F, COMMAND);

	}

	else

	{

		LCD1602Write( 0x0C, COMMAND);

	}

}