Reorganize the directory structure

[model-railway-devices.git] / firmware / lcd.c

diff --git a/firmware/lcd.c b/firmware/lcd.c
deleted file mode 100644 (file)
index f4e0387..0000000
--- a/firmware/lcd.c
+++ /dev/null
@@ -1,208 +0,0 @@
-/*
-ATMega pinout (with LCD_SHIFTREG):
-B0 - HD44780 RS
-B1 - HD44780 clock
-B2 - shift reg data
-B3 - shift reg clock
-
-ATMega pinout (without LCD_SHIFTREG):
-D4 - HD44780 RS
-D5 - HD44780 clock
-D6 - HD44780 data 0
-D7 - HD44780 data 1
-B0 - HD44780 data 2
-B1 - HD44780 data 3
-B2 - HD44780 data 4
-B3 - HD44780 data 5
-B4 - HD44780 data 6
-B5 - HD44780 data 7
-
-In both cases, HD44780 R/W needs to be connected to ground.
-*/
-#include <avr/io.h>
-#include "delay.h"
-#include "lcd.h"
-#include "timer.h"
-
-#ifdef LCD_SHIFTREG
-#define CLOCK_PORT PORTB
-#define CLOCK_BIT 0x02
-#define REGSEL_PORT PORTB
-#define REGSEL_BIT 0x01
-#else
-#define CLOCK_PORT PORTD
-#define CLOCK_BIT 0x20
-#define REGSEL_PORT PORTD
-#define REGSEL_BIT 0x10
-#endif
-
-#ifndef LCD_BUFSIZE
-#define LCD_BUFSIZE 32
-#endif
-
-#define NOP() __asm__("nop")
-
-#ifdef LCD_ASYNC
-static volatile uint8_t lcd_busy = 0;
-static uint8_t lcd_buffer[LCD_BUFSIZE];
-static volatile uint8_t lcd_buf_head = 0;
-static volatile uint8_t lcd_buf_tail = 0;
-#endif
-
-static void lcd_clock(void)
-{
-       delay_us(1);
-       CLOCK_PORT |= CLOCK_BIT;
-       delay_us(1);
-       CLOCK_PORT &= ~CLOCK_BIT;
-}
-
-static void lcd_set_data(uint8_t d)
-{
-#ifdef LCD_SHIFTREG
-       uint8_t i;
-       for(i=0; i<8; ++i)
-       {
-               PORTB = (PORTB&~0x04)|((d&1)<<2);
-               PORTB |= 0x08;
-               NOP();
-               PORTB &= ~0x08;
-               d >>= 1;
-       }
-#else
-       PORTD = (PORTD&0x3F) | (d<<6);
-       PORTB = (PORTB&0xC0) | (d>>2);
-#endif
-}
-
-static void lcd_command(uint8_t c)
-{
-       REGSEL_PORT &= ~REGSEL_BIT;
-       lcd_set_data(c);
-       lcd_clock();
-}
-
-static void lcd_delay(uint16_t us)
-{
-#ifdef LCD_ASYNC
-       lcd_busy = 1;
-       timer_start_us(0, us);
-#else
-       delay_us(us);
-#endif
-}
-
-#ifdef LCD_ASYNC
-static void lcd_wait(void)
-{
-       while(lcd_busy) ;
-}
-
-static void lcd_buffer_push(uint8_t byte)
-{
-       while((lcd_buf_head+1)%sizeof(lcd_buffer)==lcd_buf_tail) ;
-       lcd_buffer[lcd_buf_head] = byte;
-       lcd_buf_head = (lcd_buf_head+1)%sizeof(lcd_buffer);
-}
-
-static uint8_t lcd_buffer_pop(void)
-{
-       uint8_t byte = lcd_buffer[lcd_buf_tail];
-       lcd_buf_tail = (lcd_buf_tail+1)%sizeof(lcd_buffer);
-       return byte;
-}
-
-static void lcd_timer(void)
-{
-       if(lcd_busy)
-       {
-               if(lcd_buf_head!=lcd_buf_tail)
-               {
-                       uint8_t byte = lcd_buffer_pop();
-                       if(byte==0xFF)
-                       {
-                               REGSEL_PORT |= REGSEL_BIT;
-                               byte = lcd_buffer_pop();
-                       }
-                       else if(byte>=0x80)
-                               REGSEL_PORT &= ~REGSEL_BIT;
-                       else
-                               REGSEL_PORT |= REGSEL_BIT;
-                       lcd_set_data(byte);
-                       lcd_clock();
-                       lcd_delay(50);
-               }
-               else
-               {
-                       lcd_busy = 0;
-                       timer_stop(0);
-               }
-       }
-}
-
-TIMER_SET_CALLBACK(0, lcd_timer)
-#endif
-
-void lcd_init(void)
-{
-#ifdef LCD_SHIFTREG
-       DDRB |= 0x0F;
-       PORTB &= ~0x0F;
-#else
-       DDRD |= 0xF0;
-       PORTD &= ~0xF0;
-       DDRB |= 0x3F;
-       PORTB &= ~0x3F;
-#endif
-
-       delay_ms(20);
-       lcd_command(0x38);
-       delay_us(50);
-       lcd_command(0x0C);
-       delay_us(50);
-}
-
-void lcd_clear(void)
-{
-#ifdef LCD_ASYNC
-       lcd_wait();
-#endif
-       lcd_command(0x01);
-       lcd_delay(1700);
-}
-
-void lcd_gotoxy(uint8_t x, uint8_t y)
-{
-       uint8_t a = x+10*y;
-       if(y&1)
-               a += 54;
-
-#ifdef LCD_ASYNC
-       if(lcd_busy)
-       {
-               lcd_buffer_push(a|0x80);
-               return;
-       }
-#endif
-
-       lcd_command(a|0x80);
-       lcd_delay(50);
-}
-
-void lcd_write(uint8_t c)
-{
-#ifdef LCD_ASYNC
-       if(lcd_busy)
-       {
-               if(c>=0x80)
-                       lcd_buffer_push(0xFF);
-               lcd_buffer_push(c);
-               return;
-       }
-#endif
-
-       REGSEL_PORT |= REGSEL_BIT;
-       lcd_set_data(c);
-       lcd_clock();
-       lcd_delay(50);
-}