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AtTiny_alarm_clock/lcd4.c

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2018-07-16 17:11:33 +02:00
/************************************
* lcd-Treiber-Bibliothek f<EFBFBD>r Hitachi 44780 und kompatible
* z.B. KS0070B
*
*/
#include <inttypes.h>
#include <avr/io.h>
#include "lcd4.h"
/* Prototypes */
extern void wait_100us(void);
//void lcd_init(void);
//void lcd_write(uint8_t whichwrite, uint8_t zeichen, uint8_t position);
void lcd_instruct(uint8_t zeichen); //Optimzation of Code length (costs one fuction call)
// expands to lcd_write(instruct, zeichen, 0);
// void lcd_blank_line(uint8_t lcd_whichwrite);
void lcd_preinstruct(uint8_t zeichen); //Optimzation of Code length (costs one fuction call)
// expands to lcd_write(preinstruct, zeichen, 0);
// void lcd_blank_line(uint8_t lcd_whichwrite);
// Implementation
void lcd_5ms(void);
void lcd_1s(void);
/* end Prototypes */
#define lcd_mask_Write_Adress(position) ((position & 0x7F)| lcd_SET_DD_RAM)
void lcd_init(void){
/* setting up ports first */
lcd_dataport_DDR=0xff;
set_lcd_RS_DDR;
set_lcd_E_DDR;
/* end setting up ports */
lcd_dataport=0xff;
set_lcd_RS;
set_lcd_E;
lcd_5ms();
lcd_5ms();
lcd_5ms();
lcd_instruct(lcd_SET_FUNCTION_8BIT);
lcd_5ms();
lcd_instruct(lcd_SET_FUNCTION_8BIT);
wait_100us();
lcd_instruct(lcd_SET_FUNCTION_8BIT);
if (lcd_dataport_mask==0xf0){
lcd_instruct(lcd_SET_FUNCTION_4BIT|lcd_SET_FUNCTION_2LINE|lcd_SET_FUNCTION_7X5);
}else{
lcd_instruct(lcd_SET_FUNCTION_8BIT|lcd_SET_FUNCTION_2LINE|lcd_SET_FUNCTION_7X5);
}
lcd_dataport_DDR&=lcd_dataport_mask;
lcd_instruct(lcd_DISPLAY_OO_ON|lcd_DISPLAY_OO_CURSOR_OFF);
lcd_instruct(lcd_ENTRY_MODE_SET|lcd_ENTRY_MODE_SET_INCREASE | lcd_ENTRY_MS_DISPLAY_NOT_S);
lcd_instruct(lcd_RETURN_HOME);
lcd_5ms();
}
void lcd_5ms(void){
for(uint8_t i=50;i>0;i--){
wait_100us();
}
}
void lcd_1s(void){
for(uint8_t i=200;i>0;i--){
lcd_5ms();
}
}
void lcd_instruct(uint8_t zeichen){
lcd_write(instruct,zeichen,0);
}
void lcd_write(uint8_t lcd_whichwrite, uint8_t zeichen, uint8_t position){
switch (lcd_whichwrite){
case instruct :
unset_lcd_RS;
break;
case line2:
case line1:
position = position & 0x3f;
if (lcd_whichwrite == line2){ position=position + 0x40; };
case therepos:
lcd_instruct(lcd_mask_Write_Adress(position));
case here:
set_lcd_RS;
break;
}
set_lcd_E;
set_lcd_E;
lcd_dataport=lcd_dataport&~lcd_dataport_mask|zeichen&lcd_dataport_mask;
lcd_dataport=lcd_dataport&~lcd_dataport_mask|zeichen&lcd_dataport_mask;
unset_lcd_E;
unset_lcd_E;
wait_100us();
if (lcd_dataport_DDR==0xf0){
zeichen=zeichen << 4;
set_lcd_E;
set_lcd_E;
lcd_dataport=lcd_dataport&~lcd_dataport_mask|zeichen&lcd_dataport_mask;
lcd_dataport=lcd_dataport&~lcd_dataport_mask|zeichen&lcd_dataport_mask;
unset_lcd_E;
unset_lcd_E;
wait_100us();
}
}
void lcd_blank_line(uint8_t lcd_whichwrite)
{
uint8_t count;
uint8_t countin;
switch (lcd_whichwrite){
case instruct:
lcd_blank_line(line1);
case line2:
count=0x40;
break;
case line1:
count=0;
}
for (countin=count; countin < count+15; countin++){
lcd_write(therepos, 32, countin);
}
}