LCD没有放映， 请高手看下， Fosc = 12M ,
/******************************************************************************************/
/* filename : LCDDRV.C */
/* author : Steven */
/* description : lcd drive io initial, and drive functions */
/* LPC2131 connect with ST7565 */
/* D0 ~ D7 -------- P0.8 ~ P0.15 */
/* /CS1 -------- P0.4 */
/* RST -------- P0.5 */
/* D/I -------- P0.6 */
/* R/W -------- P0.7 */
/* Enable -------- P0.16 */
/* D/I : LOW - I , HIGH - D */
/* R/W : LOW - WR, HIGH - RD */
/******************************************************************************************/
#define CS1 4
#define CS1_LOW IO0CLR |= 1 << CS1;
#define CS1_HIGH IO0SET |= 1 << CS1;
#define LCD_RST 5
#define LCD_RST_LOW IO0CLR |= 1 << LCD_RST
#define LCD_RST_HIGH IO0SET |= 1 << LCD_RST
#define D_I 6
#define LCD_CMD IO0CLR |= 1 << D_I;
#define LCD_DATA IO0SET |= 1 << D_I;
#define R_W 7
#define LCD_RD IO0CLR |= 1 << R_W;
#define LCD_WR IO0SET |= 1 << R_W;
#define EN 16
#define LCD_EN IO0SET |= 1 << EN;
#define LCD_DIS IO0CLR |= 1 << EN;
#define OutData( dat ) { IO0CLR |= 0xff << 8; Io0SET |= (dat & 0xff) << 8; }
/*********Lcd Cmd *****/
#define DisplayOff 0xAE
#define DisplayOn 0xAF
#define DisplayStart 0x40
#define PageAddr 0xB0
#define ColAddrHi 0x10
#define ColAddrLo 0x00
#define SegRemapOff 0xA0
#define SegRemapOn 0xA1
#define NormalDisp 0xA6
#define ReverseDisp 0xA7
#define SWReset 0xE2
#define ComRemapOff 0xC0
#define ComRemapOn 0xC8
#define IntRegRatio 0x20
#define ContCtrlReg 0x81
#define BoostLevel 0x86
#define R_Mod_W 0xE0 /*If enter Read-Modify-Write mode, the column will not increase automatically*/
#define End_R_Mod_W 0xEE /*End of Read-Modify-Write*/
#define ModOscFreq 0xA9
#define PwrCtrlReg 0x2A
#define EntireDispOff 0xA4
#define IntVolBstrON 0x04
#define OPampBufferON 0x01
static void IoInitial( void );
static void LcdInitialCmd( void );
static void WriteLcdData( uint8 data );
static void WriteLcdCmd ( uint8 cmd );
void FullScreanBlack( void );
void clrscr( void );
void gotoxy(uint8 x, uint8 y )
void LcdInitial( void )
{
IoInitial();
LcdInitialCmd();
clrscr();
FullScreanBlack( );
}
static void IoInitial( void )
{
PINSEL0 &= 0xf;
PINSEL1 &= 0xfffffffc;
IO0DIR |= 0x1fff0;
}
static void LcdInitialCmd( void )
{
LcdReset();
WriteLcdCmd(BoostLevel);
WriteLcdCmd(DisplayOff);
WriteLcdCmd(SegRemapOn);
WriteLcdCmd(ComRemapOn);
WriteLcdCmd(IntRegRatio|0x04);
WriteLcdCmd(PwrCtrlReg|IntVolBstrON|OPampBufferON);
WriteLcdCmd(DisplayOn);
WriteLcdCmd(DisplayStart);
}
void LcdReset()
{
LCD_RST_LOW;
delay(500);
LCD_RST_HIGH;
}
static void WriteLcdData( uint8 data )
{
CS1_LOW;
LCD_DATA;
OutData(data);
LCD_WR;
LCD_EN;
LCD_RD;
LCD_DIS;
CS1_HIGH;
}
static void WriteLcdCmd ( uint8 cmd )
{
CS1_LOW;
LCD_CMD;
LCD_WR;
OutData(cmd);
LCD_EN;
LCD_RD;
LCD_DIS;
CS1_HIGH;
}
void clrscr( void )
{
uint i, j;
for( i = 0; i < 8 ; i++)
for( j = 0; j < 128; j++)
{
gotoxy( i, j);
WriteLcdData( 0x00 );
}
}
void FullScreanBlack( void )
{
uint8 i, j;
for( i = 0; i < 8 ; i++)
for( j = 0; j < 128; j++)
{
gotoxy( i, j);
WriteLcdData( 0xc6 );
}
}
void delay(uint32 i)
{
while( i-- > 0)
;
}
void gotoxy(uint8 x, uint8 y )
{
uint8 i;
x &= 0x0f;
x |= PageAddr;
WriteLcdCmd( x );
i = y;
i = (i >> 4) & 0x0f;
i |= ColAddrHi;
WriteLcdCmd( i );
y &= 0x0f;
y |= ColAddrLo;
WriteLcdCmd( y );
} |
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