📄 lcd_3200.c
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/* `=========================================================================`
***************************************
**** * * ****
Title: LCD_3200
File name: lcd_3200.c
Project name: DK3200 demo
*** ****
****************** * ******************
**** ****
Author: Petr PFEIFER
MPG Prague, Czech Republic
**** * * ****
***************************************
$Version: 0.029 Build: 2004-03-22,15:42:47
Description:
============
Universal Version
*** LCD IO with copy buffer ***
USB/IAP project source file
Version >= 0.28 reentrant functions added.
Notes:
======
Version 0.020 - Universal structure
Version 0.019 - fixed bug in PrinfLC \n part
..........................
. .
. ****************** .
. **PPPPPPPPPPPPPPPP .
. *PPPP*******PP**** .
. **PPP********PP*** .
. ***PPP******PP**** .
. *****PPP****PP**** .
. *****PPP****PP**** .
. PPPPPPPP****PP**** (R) .
. .
..........................
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Copyright 2004 ST Microelectronics
This code/file is provided as is and has no warranty,
implied or otherwise. You are free to use/modify any of the provided
code at your own risk in your applications with the expressed limitation
of liability (see below) so long as your product using the code
contains at least one uPSD products (device).
LIMITATION OF LIABILITY:
========================
NEITHER STMicroelectronics NOR ITS VENDORS OR AGENTS
SHALL BE LIABLE FOR ANY LOSS OF PROFITS, LOSS OF USE, LOSS OF DATA,
INTERRUPTION OF BUSINESS, NOR FOR INDIRECT, SPECIAL, INCIDENTAL OR
CONSEQUENTIAL DAMAGES OF ANY KIND WHETHER UNDER THIS AGREEMENT OR
OTHERWISE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
=-=-=-=-=-=-=-=-=-=-=-=-=
=-=-=-=-=-=
For current information on uPSD products,
please consult our pages on the World Wide Web:
www.st.com/psm
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STMicroelectronics GROUP OF COMPANIES
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http://www.st.com
`========================================================================` */
#pragma NOAREGS
#include "upsd3200.h"
#include "lcd_3200.h"
#include "app_intr.h"
// LCD Display copy buffer
xdata DISPLAY LCD_reg _at_ LCD_BASE_ADDR; // XDATA address for display
#ifdef LCD_BCBuffer
data char LCD_buffer[LCD_ColNumBuf*LCD_RowNum]; // IAP&D Memory
#endif
data unsigned char LCDDisp_XPos,LCDDisp_YPos;// Actual cursor position
static data uchar Cursor_LCD;
// User design CG data
static uchar code cg_data[] =
{
0x1F,
0x1F,
0x1F,
0x1F,
0x1F,
0x1F,
0x1F,
0x1F,
-1 // Terminator, end of data char
}
;
void LCD_delay_ms(int cnt)
/******************************************************************************
Function : void delay_xms()
Parameters : (int cnt)
Description: Delay
******************************************************************************/
{
int w;
while (cnt>0)
{
for (w = 0; w<600; w++); // 5T/cycle(.33us) =>1.67
cnt--;
}
}
void BusyCheck(void)
/******************************************************************************
Function : void BusyCheck()
Parameters : (void)
Description: Tests LCD Busy flag, waits until BF is cleared
******************************************************************************/
{
while (LCD_reg.LCD_CMD_RD & BF_BIT);
}
void SetUserCG(unsigned char *data_ptr)
/******************************************************************************
Function : void SetUserCG()
Parameters : (unsigned char *data_ptr)
Description: Sets user character set / initialize user character pattern
******************************************************************************/
{
BusyCheck(); // Check display ability to comm.
LCD_reg.LCD_CMD_WR = CG_ADDR; // | (8*0);
//start custom char.set from character #0
while (*data_ptr != -1)
{
BusyCheck();
LCD_reg.LCD_RAM_WR = *data_ptr++;
}
}
static char htoa_lo(byte) uchar byte;
/******************************************************************************
Function : static char htoa_lo()
Parameters : (byte)
Description: converts low nibble of unsigned byte
******************************************************************************/
{
byte = byte & 0x0F; // keep lower nibble only
if (byte <= 0x09)
return(byte + 0x30);
else
return (byte + 0x37);
}
static char htoa_hi(byte) uchar byte;
/******************************************************************************
Function : static char htoa_hi()
Parameters : (byte)
Description: converts hi nibble of unsigned byte
******************************************************************************/
{
byte = byte & 0xF0; // keep upper nibble only
byte = byte >> 4;
if (byte <= 0x09)
return(byte + 0x30);
else
return (byte + 0x37);
}
void initLCD(void)
/******************************************************************************
Function : void initLCD()
Parameters : (void)
Description: initialize LCD module per specs
******************************************************************************/
{
#ifdef LCD_BCBuffer
int i;
#endif
LCD_delay_ms(15);
LCD_reg.LCD_CMD_WR = 0x30;
LCD_delay_ms(4);
LCD_reg.LCD_CMD_WR = 0x30;
LCD_delay_ms(1);
LCD_reg.LCD_CMD_WR = 0x30;
LCD_delay_ms(1);
LCD_reg.LCD_CMD_WR = 0x38; // 8 bits, 2 lines, 5 x 7 font
LCD_delay_ms(4); // delay 4 ms
BusyCheck();
LCD_reg.LCD_CMD_WR = 0x0C; //Display on, Cursor off, Non-Blink
BusyCheck();
LCD_reg.LCD_CMD_WR = 0x01; //Clear display
BusyCheck();
LCD_reg.LCD_CMD_WR = 0x02; //Cursor home
BusyCheck();
LCD_reg.LCD_CMD_WR = 0x06; //Cursor inc, no shift/cursor move
SetUserCG(&cg_data); //set user desfined character
Cursor_LCD = DD_ADDR; //Display from 1st row, 1st column
BusyCheck();
LCD_reg.LCD_CMD_WR = Cursor_LCD;
#ifdef LCD_BCBuffer
// Initialize mirror buffer
for (i=0;i<LCD_ColNumBuf*LCD_RowNum;i++) // Clear IAP&D display memory
{
LCD_buffer[i] = ' ';
}
//add user character at the end of line
LCD_buffer[LCD_ColNum+0] = 13;
LCD_buffer[LCD_ColNum+1] = 10; //new line indicator for WinApp terminal
LCD_buffer[LCD_ColNumBuf+LCD_ColNum+0] = 0;
LCD_buffer[LCD_ColNumBuf+LCD_ColNum+1] = 0;// END OF STRING
#endif
LCDDisp_XPos = 0; // Cursor position at home
LCDDisp_YPos = 0;
//please see LCD_3200.H for more details about the buffer
}
void putch_LCD(unsigned char ch)
/******************************************************************************
Function : void putch_LCD()
Parameters : (unsigned char ch)
Description: basic char out function
******************************************************************************/
{
BusyCheck();
LCD_reg.LCD_RAM_WR = ch;
#ifdef LCD_BCBuffer
if (LCDDisp_XPos<LCD_ColNum)
{
LCD_buffer[LCDDisp_YPos*LCD_ColNumBuf+LCDDisp_XPos] = ch;
}
#endif
if (LCDDisp_XPos <= LCD_ColNum)
{
LCDDisp_XPos++;
}
}
void printfLCD(uchar *chr_ptr, ...)
/******************************************************************************
Function : void printfLCD()
Parameters : (uchar *chr_ptr, ...)
Description: works as prinf, but for LCD
******************************************************************************/
{
unsigned char *var_ptr=&chr_ptr+1;
unsigned char var;
unsigned int i;
while (*chr_ptr != NULL)
{
BusyCheck();
if (*chr_ptr == '\r')
{
chr_ptr++;
Cursor_LCD &= 0xC0; //return to position 0 at current line
LCD_reg.LCD_CMD_WR = Cursor_LCD;
LCDDisp_XPos = 0;
}
else
if (*chr_ptr == '\n')
{
chr_ptr++;
Cursor_LCD ^= 0x40; //goto next line
Cursor_LCD &= 0xC0; //return to position 0
LCD_reg.LCD_CMD_WR = Cursor_LCD;
LCDDisp_XPos = 0;
LCDDisp_YPos = LCDDisp_YPos < LCD_RowNum-1 ? LCDDisp_YPos+1:0;
}
else
if (*chr_ptr == '%')
{
chr_ptr++;
if (*chr_ptr == 'd') // display 1 digit decimal 0-9
{
chr_ptr++;
var = *var_ptr++;
putch_LCD((var & 0x0F)+'0'); // Out character to LCD Display RAM
}
else
if (*chr_ptr == 'x') // display 1 byte hex 00-FF
{
chr_ptr++;
var = *var_ptr++;
putch_LCD(htoa_hi(var)); // Out character to LCD Display RAM
putch_LCD(htoa_lo(var)); // Out character to LCD Display RAM
}
else
if (*chr_ptr == 'w') // display 1 word hex 0000-FFFF
{
chr_ptr++;
var = *var_ptr++;
putch_LCD(htoa_hi(var)); // Out character to LCD Display RAM
putch_LCD(htoa_lo(var)); // Out character to LCD Display RAM
var = *var_ptr++;
putch_LCD(htoa_hi(var)); // Out character to LCD Display RAM
putch_LCD(htoa_lo(var)); // Out character to LCD Display RAM
}
else
if (*chr_ptr == 'c') // Display 1 character
{
chr_ptr++;
var = *var_ptr++;
putch_LCD(var); // Out character to LCD Display RAM
}
else
if (*chr_ptr == 'B') // display 1 byte
{
chr_ptr++;
var = *var_ptr++;
putch_LCD(48+(var/100)); // Out character to LCD Display RAM
var = var % 100;
putch_LCD(48+(var/10)); // Out character to LCD Display RAM
var = var % 10;
putch_LCD(48+var); // Out character to LCD Display RAM
}
else
if (*chr_ptr == 'W') // display 1 word
{
chr_ptr++;
i = (*var_ptr++);
i = i*256;
i = i+(*var_ptr++);
putch_LCD(48+(i/10000)); // Out character to LCD Display RAM
i = i % 10000;
putch_LCD(48+(i/1000)); // Out character to LCD Display RAM
i = i % 1000;
putch_LCD(48+(i/100)); // Out character to LCD Display RAM
i = i % 100;
putch_LCD(48+(i/10)); // Out character to LCD Display RAM
i = i % 10;
putch_LCD(48+i); // Out character to LCD Display RAM
}
else
{
putch_LCD(*chr_ptr++); // Out character to LCD Display RAM
}
}
else
{
putch_LCD(*chr_ptr++); // Out character to LCD Display RAM
}
}
}
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