void keyPressed(char key)
{
//the clear button
if (key == 'C')
{
clear();
_log("lcd cleared\r\0");
return;
}
//
switch (state)
{
case 0:
if ((value=getDigit(key)) != -1) //digit
{_log("number\r\0")
//check stack, if full show errer
if (! stack_isfull(sd1))
{
stack_push(sd1,value);
LCD_SendData(key);
}
else
{
showError();
_log(" stack full\r\0");
}
}
else if(getOperator(key) != -1) //operator
//==========================================================================================
// print a string on LCD.
//==========================================================================================
void LCD_SendText(char *text)
{
while(*text)
{
LCD_SendData(*text);
text++;
}
}
/*
* the string must be ended with a null char
*/
void LCD_SendStr(char * ptr) // send string function
{
int i=0;
while(ptr[i]!='\0')
{
LCD_SendData(ptr[i]);
i++;
}
}
//==========================================================================================
// Initialize the LCD.
//==========================================================================================
void LCD_Initialization(void)
{
uint8_t i;
char const *p;
GPIO_InitTypeDef GPIO_InitStructure;
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB, ENABLE);
GPIO_InitStructure.GPIO_Pin = (LCD_D7 | LCD_D6 | LCD_D5 | LCD_D4 | LCD_EN | LCD_RS);
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(LCD_PORT, &GPIO_InitStructure);
delay_ms(15);
GPIO_ResetBits(LCD_PORT, LCD_RS);
GPIO_ResetBits(LCD_PORT, LCD_EN);
for(i = 0; i<3; i++)
{
GPIO_SetBits(LCD_PORT, LCD_D4 | LCD_D5);
GPIO_ResetBits(LCD_PORT, LCD_D6 | LCD_D7);
GPIO_SetBits(LCD_PORT, LCD_EN);
delay_us(50);
GPIO_ResetBits(LCD_PORT, LCD_EN);
delay_ms(10);
}
delay_ms(50);
GPIO_SetBits(LCD_PORT, LCD_D5);
GPIO_ResetBits(LCD_PORT,LCD_D4 | LCD_D6 | LCD_D7);
GPIO_SetBits(LCD_PORT, LCD_EN);
delay_ms(50);
GPIO_ResetBits(LCD_PORT, LCD_EN);
LCD_SendCmd(0x28);
LCD_SendCmd(0x08);
LCD_SendCmd(0x01);
LCD_SendCmd(0x06);
LCD_SendCmd(0x0C);
delay_ms(5);
/* Load user-specific characters into CGRAM */
LCD_SendCmd(0x40); /* Set CGRAM address counter to 0 */
p = &UserFont[0][0];
for (i = 0; i < sizeof(UserFont); i++, p++)
LCD_SendData (*p);
LCD_SendCmd(0x80); /* Set DDRAM address counter to 0 */
}
/*********************************************************************
* Function: void LCD_PutChar(char);
*
* Overview: Puts a character on the LCD screen. Unsupported characters will be
* discarded. May block or throw away characters is LCD is not ready
* or buffer space is not available.
*
* PreCondition: already initialized via LCD_Initialize()
*
* Input: char - character to print
*
* Output: None
*
********************************************************************/
void LCD_PutChar ( char inputCharacter )
{
switch (inputCharacter)
{
case '\r':
LCD_CarriageReturn ( ) ;
break ;
case '\n':
if (row == 0)
{
LCD_ShiftCursorDown ( ) ;
}
else
{
LCD_ShiftCursorUp ( ) ;
}
break ;
case '\b':
LCD_ShiftCursorLeft ( ) ;
LCD_PutChar ( ' ' ) ;
LCD_ShiftCursorLeft ( ) ;
break ;
default:
LCD_SendData ( inputCharacter ) ;
column++ ;
if (column == LCD_MAX_COLUMN)
{
column = 0 ;
if (row == 0)
{
LCD_SendCommand ( LCD_COMMAND_ROW_1_HOME , LCD_S_INSTR ) ;
row = 1 ;
}
else
{
LCD_SendCommand ( LCD_COMMAND_ROW_0_HOME , LCD_S_INSTR ) ;
row = 0 ;
}
}
break ;
}
}
/**
* Print a character.
*/
void LCD_Putc(char c) {
LCD_SendData(c);
}