/********************************************************************************************************
*
* File : LCD12864.c
* Hardware Environment: DVK501 && F320 EX
* Build Environment : Silicon LABs 3.42.00 / uVision3 V3.80 20100913
* Version :
* By : Su Wei Feng
*
*                                                          (c) Copyright 2005-2010, WaveShare
*                                                                     http://www.waveshare.net
*                                                                         All Rights Reserved
*
*********************************************************************************************************/

#define _DVK501_F320_EX_

#include <c8051f320.h>
#include <../../../../library/C8051F/ws_clock.h>
#include <../../../../library/C8051F/ws_delay.h>
#include <../../../../library/C8051F/ws_lcd_st7920_port.h>

void main(void)
{
PCA0MD &= ~0x40; //Clear watchdog timer enable
XBR1 = 0x40;
clock_external();
delay_ms(100);
SPI_Init();
st7920LcdInit();
showLine(2,1,lcd_buffer,"深圳微雪电子");
showLine(2,2,lcd_buffer,"WaveShare.net");
refreshLCD(lcd_buffer);

while(1);
}

 

/********************************************************************************************************
*
* File : ws_lcd_st7920_port.h
* Hardware Environment:
* Build Environment : Silicon LABs 3.42.00 / uVision3 V3.80 20100913
* Version :
* By : Su Wei Feng
*
*                                                          (c) Copyright 2005-2010, WaveShare
*                                                                     http://www.waveshare.net
*                                                                         All Rights Reserved
*
*********************************************************************************************************/

#ifndef _WS_LCD_ST7920_PORT_H
#define _WS_LCD_ST7920_PORT_H

void st7920LcdInit(void);
void spiSendChar(uchar send_char);
void sendCodeST7920(uchar Lcd_code);
void sendDataST7920(uchar Lcd_data);
void refreshLCD(const uchar *lcd_stack);
void decToAscii(uchar* str,uint dec,uchar width);
void hexToAscii(uchar* str,uint hex,uchar width);
void showLine(const uchar x,const uchar y,uchar* lcd_stack,char * str,...);

uchar idata lcd_buffer[64];

/*Hardware Environment：DVK501 && F320 EX*/
#if defined(_DVK501_F320_EX_)
sbit CS_LCD = P0^7;

void SPI_Init(void)
{
XBR0 |= 0x03;
P0SKIP |= 0x80;
P0MDOUT |= 0xC1;
SPI0CFG = 0x40;
SPI0CN = 0x01;
SPI0CKR = 0x05;
}

#else
#warning "No SPI!"
#endif

#include <../../../../library/C8051F/ws_lcd_st7920.h>

#endif /*_WS_LCD_ST7920_PORT_H*/

 

********************************************************************************************************
*
* File : ws_lcd_st7920.h
* Hardware Environment:
* Build Environment : Silicon LABs 3.42.00 / uVision3 V3.80 20100913
* Version :
* By : Su Wei Feng
*
*                                                          (c) Copyright 2005-2010, WaveShare
*                                                                     http://www.waveshare.net
*                                                                         All Rights Reserved
*
*********************************************************************************************************/

#ifndef _WS_LCD_ST7920_H
#define _WS_LCD_ST7920_H

#include <string.h>
#include <stdarg.h>

#define LCD_DELAY() delay_us(75)

void st7920LcdInit(void)
{
sendCodeST7920(0x30);
sendCodeST7920(0x0C);
sendCodeST7920(0x01);
sendCodeST7920(0x02);
sendCodeST7920(0x80);
delay_ms(2);
memset(lcd_buffer,' ',sizeof(lcd_buffer));
}

void spiSendChar(uchar send_char)
{
SPIF = 0;
SPI0DAT = send_char;
while (!SPIF);
}

/********************************

Software simulation SPI

**********************************/
/*void spiSendChar(uchar send_char)
{
uchar i;
for(i=8;i>0;i--)
{
if(send_char & (1 << (i-1)))
RW_SID = 1;
else
RW_SID = 0;
delay_us(10);
E_CLK = 1;
delay_us(10);
E_CLK = 0;
delay_us(10);
}
}*/

void sendCodeST7920(uchar Lcd_code)
{
/*CS_LCD = 1;
delay_us(10);*/

spiSendChar(0xF8);
spiSendChar(Lcd_code & 0xF0);
spiSendChar((Lcd_code << 4));
LCD_DELAY();

/*delay_us(10);
CS_LCD = 0;*/
}

void sendDataST7920(uchar Lcd_data)
{
/*CS_LCD = 1;
delay_us(10);*/

spiSendChar(0xFA);
spiSendChar(Lcd_data & 0xF0);
spiSendChar((Lcd_data << 4));
LCD_DELAY();

/*delay_us(10);
CS_LCD = 0;*/
}

void refreshLCD(const uchar *lcd_stack)
{
uchar addr;
sendCodeST7920(0x02);
for(addr=0;addr<16;addr++)
{
sendDataST7920(*(lcd_stack + addr));
}
for(addr=32;addr<48;addr++)
{
sendDataST7920(*(lcd_stack + addr));
}
for(addr=16;addr<32;addr++)
{
sendDataST7920(*(lcd_stack + addr));
}

for(addr=48;addr<64;addr++)
{
sendDataST7920(*(lcd_stack + addr));
}
}

void decToAscii(uchar* str,uint dec,uchar width)
{
while(width)
{
switch(width)
{
case 5:
{
*str = (dec / 10000 + '0');
dec %= 10000;
break;
}
case 4:
{
*str = (dec / 1000 + '0');
dec %= 1000;
break;
}
case 3:
{
*str = (dec / 100 + '0');
dec %= 100;
break;
}
case 2:
{
*str = (dec / 10 + '0');
dec %= 10;
break;
}
case 1:
{
*str = (dec + '0');
break;
}
default: *str = '0';
}
width--;
str++;
}
}

void hexToAscii(uchar* str,uint hex,uchar width)
{
uint tmp;
while(width)
{
switch(width)
{
case 4:
{
tmp = (hex >> 12);
if(tmp > 9) *str = tmp + ('A' - 10);
else *str = tmp + '0';
break;
}
case 3:
{
tmp = (hex >> 8) & 0x000F;
if(tmp > 9) *str = tmp + ('A' - 10);
else *str = tmp + '0';
break;
}
case 2:
{
tmp = (hex >> 4) & 0x000F;
if(tmp > 9) *str = tmp + ('A' - 10);
else *str = tmp + '0';
break;
}
case 1:
{
tmp = hex & 0x000F;
if(tmp > 9) *str = tmp + ('A' - 10);
else *str = tmp + '0';
break;
}
default: *str = '0';
}
width--;
str++;
}
}

void showLine(const uchar x,const uchar y,uchar *lcd_stack,char *str,...)
{
uchar coordinate = 16 * y + x;
va_list marker;
va_start(marker,str); // Initialize variable arguments.
while(*str != '\0')
{
if(coordinate > 64) break;

if(*str == '\\')
{
str++;
lcd_stack[coordinate] = *str;
}
else if(*str == '%')
{
str++;
if (*str == 'd' || *str == 'D')
{
str++;
decToAscii(&lcd_stack[coordinate],va_arg(marker,uchar),(*str - '0'));
coordinate += (*str - '0' - 1);
}
else if(*str == 'c' || *str == 'C')
{
lcd_stack[coordinate] = va_arg(marker,uchar);
}
else if(*str == 'x' || *str == 'X')
{
str++;
hexToAscii(&lcd_stack[coordinate],va_arg(marker,uchar),(*str - '0'));
coordinate += (*str - '0' - 1);
}
}
else
{
lcd_stack[coordinate] = *str;
}
str++;
coordinate++;
}
va_end( marker ); // Reset variable arguments.
}

#endif /*_WS_LCD_ST7920_H*/