Reorganize the directory structure

[model-railway-devices.git] / firmware / s88w-r.c

diff --git a/firmware/s88w-r.c b/firmware/s88w-r.c
deleted file mode 100644 (file)
index 0198974..0000000
--- a/firmware/s88w-r.c
+++ /dev/null
@@ -1,219 +0,0 @@
-/*
-Firmware for wireless S88 receiver module
-
-S88 pinout:
-1 - DATA
-2 - GND
-3 - CLOCK
-4 - LOAD
-5 - RESET
-6 - POWER
-
-ATMega pinout:
-D0 - serial RX
-D1 - serial TX
-D2 - S88 DATA
-D3 - S88 CLOCK
-D4 - S88 LOAD
-D5 - S88 RESET
-*/
-
-#include <avr/io.h>
-#include <avr/interrupt.h>
-#include "lcd.h"
-#include "serial.h"
-#include "delay.h"
-
-#define DATA_OUT PORTD2
-#define CLOCK    PIND3
-#define LOAD     PIND4
-#define RESET    PIND5
-
-#define LCD_DISABLE PINB4
-
-#define BIT(n)   (1<<(n))
-
-void receive(uint8_t);
-uint8_t hexdigit(uint8_t);
-uint8_t decode_hex(uint8_t);
-
-volatile uint8_t rx_buf[7];
-volatile uint8_t rx_fill = 0xFF;
-volatile uint8_t input[128] = { 0 };
-volatile uint8_t latch[128] = { 0 };
-volatile uint8_t lcd_enabled = 0;
-uint8_t log_row = 0;
-uint8_t log_col = 0;
-
-int main()
-{
-       uint8_t clock_high = 0;
-       uint8_t bits = 0;
-       uint8_t n_bits = 8;
-       uint8_t offset = 0;
-       uint8_t i;
-
-       DDRD = 0x06;   // 00000110
-       PORTD = 0xC0;  // 11000000
-       DDRB = 0x20;   // 00100000
-       PORTB = 0x1F;  // 00011111
-
-       serial_init(9600);
-       lcd_init();
-
-       sei();
-
-       while(1)
-       {
-               uint8_t b_pins, d_pins;
-
-               b_pins = PINB;
-               d_pins = PIND;
-
-               if(d_pins&BIT(CLOCK))
-               {
-                       if(!clock_high)
-                       {
-                               if(d_pins&BIT(LOAD))
-                               {
-                                       offset = 0;
-                                       bits = latch[0];
-                                       n_bits = 8;
-                               }
-                               else
-                               {
-                                       bits >>= 1;
-                                       if(!--n_bits)
-                                       {
-                                               ++offset;
-                                               bits = latch[offset];
-                                               n_bits = 8;
-                                       }
-                               }
-
-                               if(bits&1)
-                                       PORTD |= BIT(DATA_OUT);
-                               else
-                                       PORTD &= ~BIT(DATA_OUT);
-
-                               clock_high = 1;
-                       }
-               }
-               else if(clock_high)
-                       clock_high = 0;
-
-               if(d_pins&BIT(RESET))
-               {
-                       uint8_t i;
-                       for(i=0; i<128; ++i)
-                               latch[i] = input[i];
-               }
-
-               if(b_pins&BIT(LCD_DISABLE))
-               {
-                       if(lcd_enabled)
-                       {
-                               lcd_enabled = 0;
-
-                               lcd_clear();
-                       }
-               }
-               else if(!lcd_enabled)
-               {
-                       lcd_enabled = 1;
-                       log_row = 0;
-                       log_col = 0;
-
-                       lcd_clear();
-                       for(i=0; i<20; ++i)
-                               lcd_write(hexdigit(input[9-i/2]>>(4-i%2*4)));
-                       lcd_gotoxy(0, 1);
-                       lcd_write(255);
-               }
-       }
-}
-
-void receive(uint8_t c)
-{
-       if(rx_fill==0xFF)
-       {
-               if(c==':')
-                       rx_fill = 0;
-       }
-       else if(c=='.')
-       {
-               if(rx_fill>=4)
-               {
-                       uint16_t offset;
-                       uint8_t nibbles;
-                       uint8_t i;
-
-                       offset = (decode_hex(rx_buf[0])<<8) | (decode_hex(rx_buf[1])<<4) | decode_hex(rx_buf[2]);
-                       nibbles = (offset&3);
-                       offset >>= 2;
-                       if(rx_fill>3+nibbles)
-                       {
-                               for(i=0; i<=nibbles; ++i)
-                               {
-                                       uint16_t j = offset+nibbles-i;
-                                       uint8_t shift = 4*(j&1);
-                                       uint8_t bits = decode_hex(rx_buf[3+i]);
-                                       input[j/2] = (input[j/2]&~(0xF<<shift)) | (bits<<shift);
-                                       latch[j/2] = input[j/2];
-                               }
-
-                               if(lcd_enabled)
-                               {
-                                       lcd_gotoxy(19-offset-nibbles, 0);
-                                       for(i=0; i<=nibbles; ++i)
-                                               lcd_write(rx_buf[3+i]);
-                               }
-                       }
-               }
-               rx_fill = 0xFF;
-       }
-       else
-       {
-               if(rx_fill<sizeof(rx_buf))
-                       rx_buf[rx_fill++] = c;
-               else
-                       rx_fill = 0xFF;
-       }
-
-       if(lcd_enabled)
-       {
-               lcd_gotoxy(log_col, 1+log_row);
-               lcd_write(c);
-               ++log_col;
-               if(log_col>=20)
-               {
-                       log_col = 0;
-                       ++log_row;
-                       if(log_row>=3)
-                               log_row = 0;
-                       lcd_gotoxy(log_col, 1+log_row);
-               }
-               lcd_write(255);
-       }
-}
-
-SERIAL_SET_CALLBACK(receive)
-
-uint8_t hexdigit(uint8_t n)
-{
-       n &= 0xF;
-       if(n<10)
-               return '0'+n;
-       else
-               return 'A'+(n-0xA);
-}
-
-uint8_t decode_hex(uint8_t c)
-{
-       if(c>='0' && c<='9')
-               return c-'0';
-       else if(c>='A' && c<='F')
-               return 0xA+(c-'A');
-       else
-               return 0;
-}