/* 设置显示RAM起始地址，亦即光标位置，(x,y)-对应屏幕上的字符坐标 */
void LcdSetCursor(unsigned char x, unsigned char y)
{
unsigned char addr;
if (y == 0) //由输入的屏幕坐标计算显示RAM的地址
addr = 0x00 + x; //第一行字符地址从0x00起始
else
addr = 0x40 + x; //第二行字符地址从0x40起始
LcdWriteCmd(addr | 0x80); //设置RAM地址
}
/***************************************
说明: 设置光标定位
*****************************************/
void LocateXY(char x , char y)
{
unsigned char temp;
temp = x & 0xf;
y &= 0x1;
if ( y )temp |= 0x40;
temp |= 0x80;
LcdWriteCmd(temp,1);
}
/*******************************************
函数名称：Lcd1602LocateXY
功 能：向液晶输入显示字符位置的坐标信息
参 数：x--位置的列坐标
y--位置的行坐标
返回值 ：无
********************************************/
void Lcd1602LocateXY(uint8 x,uint8 y)
{
uint8 temp;
temp = x&0x0f;
y &= 0x01;
if(y) temp |= 0x40; //如果在第2行
temp |= 0x80;
LcdWriteCmd(temp,1);
}
static void LcdSetCursor(uint8_t pos)
{
uint8_t offset[] = {
#ifdef LCD_KS0073
0x00, 0x20, 0x40, 0x60
#elif (LCD_COLS >= 20)
0x00, 0x40, 0x14, 0x54
#else
0x00, 0x40, 0x10, 0x50
#endif
};
pos = offset[(pos / LCD_COLS) % LCD_ROWS] + pos % LCD_COLS;
LcdWriteCmd(1 << LCD_DDRAM | pos);
}
/*******************************************
函数名称：Lcd1602Reset
功 能：对1602液晶模块进行复位操作
参 数：无
返回值 ：无
********************************************/
void Lcd1602Reset(void)
{
LcdCtlOut; //控制线端口设为输出状态
LcdDatOutCtl; //数据端口设为输出状态
LcdWriteCmd(0x38, 0); //规定的复位操作
delay_ms(5);
LcdWriteCmd(0x38, 0);
delay_ms(5);
LcdWriteCmd(0x38, 0);
delay_ms(5);
LcdWriteCmd(0x38, 1); //显示模式设置
LcdWriteCmd(0x08, 1); //显示关闭
LcdWriteCmd(0x01, 1); //显示清屏
LcdWriteCmd(0x06, 1); //写字符时整体不移动
LcdWriteCmd(0x0c, 1); //显示开，不开游标，不闪烁
}
static int LcdInit(NUTDEVICE * dev)
{
LCD_RS_CLR();
LCD_RW_CLR();
LcdClrBits(LCD_DATA);
NutMicroDelay(30);
LCD_EN_CLR();
NutMicroDelay(30);
NutSleep(18);
/* This initialization will make sure, that the LCD is switched
* to 8-bit mode, no matter which mode we start from or we finally
* need.
*/
LcdWriteCmd(_BV(LCD_FUNCTION) | _BV(LCD_FUNCTION_8BIT));
NutSleep(16);
LcdWriteCmd(_BV(LCD_FUNCTION) | _BV(LCD_FUNCTION_8BIT));
NutSleep(4);
LcdWriteCmd(_BV(LCD_FUNCTION) | _BV(LCD_FUNCTION_8BIT));
NutSleep(2);
LcdWriteInstruction((_BV(LCD_FUNCTION)) | (_BV(LCD_FUNCTION_8BIT)) | (_BV(LCD_EXT)) , LCD_SHORT_DELAY);
/* Switch display and cursor off. */
LcdWriteNibble(_BV(LCD_ON_CTRL) >> 4);
LcdWriteNibble(_BV(LCD_ON_CTRL));
NutSleep(2);
/* Clear display. */
LcdClear();
/* Set entry mode. */
LcdWriteCmd(_BV(LCD_ENTRY_MODE) | _BV(LCD_ENTRY_INC));
/* Switch display on. */
LcdWriteCmd(_BV(LCD_ON_CTRL) | _BV(LCD_ON_DISPLAY));
/* Move cursor home. */
LcdCursorHome();
/* Set data address to zero. */
LcdWriteCmd(_BV(LCD_DDRAM));
return 0;
}
static void LcdWriteInstruction(uint8_t cmd, uint8_t xt)
{
LcdWriteCmd(cmd);
}
static void LcdCursorMode(uint8_t on)
{
LcdWriteCmd(1 << LCD_ON_CTRL | on ? 1 << LCD_ON_CURSOR : 0x00);
}
static void LcdClear(void)
{
LcdWriteCmd(_BV(LCD_CLR));
NutSleep(2);
}
static void LcdCursorRight(void)
{
LcdWriteCmd(1 << LCD_MOVE | 1 << LCD_MOVE_RIGHT);
}
static void LcdCursorLeft(void)
{
LcdWriteCmd(1 << LCD_MOVE);
}
static void LcdCursorHome(void)
{
LcdWriteCmd(1 << LCD_HOME);
NutSleep(2);
}
/* 打开光标的闪烁效果 */
void LcdOpenCursor(){
LcdWriteCmd(0x0F);
}
/* 关闭光标显示 */
void LcdCloseCursor(){
LcdWriteCmd(0x0C);
}
/*******************************************
函数名称：Lcd1602Clr
功 能：LCD1602 清屏显示
参 数：无
返回值 ：无
********************************************/
void Lcd1602Clr(void)
{
LcdWriteCmd(0x01,1);
}
static int LcdInit(NUTDEVICE * dev)
{
#if defined(PMC_PCER)
outr(PMC_PCER, _BV(LCD_RS_PIO_ID) | _BV(LCD_EN_PIO_ID));
#endif
/* Initialize GPIO lines. */
#ifdef LCD_RW_BIT
outr(PMC_PCER, _BV(LCD_RW_PIO_ID));
LCD_RW_CLR();
#endif
#ifdef LCD_EN2_BIT
outr(PMC_PCER, _BV(LCD_EN2_PIO_ID));
LCD_EN2_CLR();
#endif
#ifdef LCD_RST_BIT
outr(PMC_PCER, _BV(LCD_RST_PIO_ID));
LCD_RST_CLR();
#endif
LCD_RS_CLR();
LCD_RW_CLR();
LcdClrBits(LCD_DATA);
NutMicroDelay(30);
LCD_EN_CLR();
NutMicroDelay(30);
/* Initial delay. Actually only required after power on. */
NutSleep(16);
/* This initialization will make sure, that the LCD is switched
* to 8-bit mode, no matter which mode we start from or we finally
* need.
*/
LcdWriteNibble((_BV(LCD_FUNCTION) | _BV(LCD_FUNCTION_8BIT)) >> 4);
NutSleep(15);
LcdWriteNibble((_BV(LCD_FUNCTION) | _BV(LCD_FUNCTION_8BIT)) >> 4);
NutSleep(4);
LcdWriteNibble((_BV(LCD_FUNCTION) | _BV(LCD_FUNCTION_8BIT)) >> 4);
NutSleep(2);
#ifdef LCD_IF_4BIT
/* We now switch to 4-bit mode */
LcdWriteNibble(_BV(LCD_FUNCTION) >> 4);
NutSleep(2);
// TODO: Add support for large font in single line displays
/* Set number of lines and font. Can't be changed later. */
#if (LCD_ROWS == 2) || (LCD_ROWS==4)
LcdWriteNibble((_BV(LCD_FUNCTION) | _BV(LCD_FUNCTION_2LINES)) >> 4);
LcdWriteNibble(_BV(LCD_FUNCTION) | _BV(LCD_FUNCTION_2LINES));
#else
LcdWriteNibble(_BV(LCD_FUNCTION) >> 4);
LcdWriteNibble(_BV(LCD_FUNCTION) );
#endif
#else /* LCD_IF_4BIT */
LcdWriteCmd(_BV(LCD_FUNCTION) | _BV(LCD_FUNCTION_8BIT));
#endif /* LCD_IF_4BIT */
NutSleep(2);
/* Switch display and cursor off. */
LcdWriteNibble(_BV(LCD_ON_CTRL) >> 4);
LcdWriteNibble(_BV(LCD_ON_CTRL));
NutSleep(2);
/* Clear display. */
LcdClear();
/* Set entry mode. */
LcdWriteCmd(_BV(LCD_ENTRY_MODE) | _BV(LCD_ENTRY_INC));
/* Switch display on. */
LcdWriteCmd(_BV(LCD_ON_CTRL) | _BV(LCD_ON_DISPLAY));
/* Move cursor home. */
LcdCursorHome();
/* Set data address to zero. */
LcdWriteCmd(_BV(LCD_DDRAM));
return 0;
}
/*******************************************
函数名称：Lcd1602Cursor( uint8 u8CurOn)
功 能：1602 光标显示 开关
参 数：u8CurOn为0 光标关，否则开
返回值 ：无
********************************************/
void Lcd1602CursorOn(uint8 u8CurOn)
{
if(u8CurOn) LcdWriteCmd(0x0f,1);
else LcdWriteCmd(0x0c,1);
}