Reorganize the directory structure

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

diff --git a/firmware/s88w-t.c b/firmware/s88w-t.c
deleted file mode 100644 (file)
index 692eac5..0000000
--- a/firmware/s88w-t.c
+++ /dev/null
@@ -1,177 +0,0 @@
-/*
-Firmware for wireless S88 transmitter module
-
-ATMega pinout:
-D0 - serial RX
-D1 - serial TX
-D2 - input 1
-D3 - input 2
-D4 - input 3
-D5 - input 4
-D6 - input 5
-D7 - input 6
-B0 - input 7
-B1 - input 8
-B2 - input 9
-B3 - input 10
-B4 - input 11
-B5 - input 12
-
-Inputs are pulled high by internal pull-up resistors.  Connect to GND to
-activate.
-
-The module can be configured by sending a string of form ":Shhh." over the
-serial port, where hhh is a hex number.  Lower two bits indicate the number of
-inputs (00=4, 01=8, 10=12, 11=16) and upper ten bits indicate offset of lowest
-input in multiples of 4 bits.  At the moment there are no provisions for
-having 16 physical inputs.
-
-Example: ":S016." would configure the module to have 12 inputs at offset 20.
-*/
-
-#include <avr/io.h>
-#include <avr/interrupt.h>
-#include "eeprom.h"
-#include "serial.h"
-#include "timer.h"
-
-#define BIT(n) (1<<(n))
-
-void receive(uint8_t);
-void send_state(void);
-uint8_t hexdigit(uint8_t);
-uint8_t decode_hex(uint8_t);
-
-uint8_t rx_buf[4];
-uint8_t rx_fill = 0xFF;
-volatile uint8_t nibbles = 2;
-volatile uint8_t offset = 0;
-volatile uint16_t state = 0;
-volatile uint8_t time_since_send = 0;
-
-int main()
-{
-       if(eeprom_read(0)==0xA5)
-       {
-               offset = eeprom_read(1)<<8;
-               offset |= eeprom_read(2);
-               nibbles = eeprom_read(3);
-       }
-
-       DDRD = 0x02;   // 00000010
-       PORTD = 0xFC;  // 11111100
-       DDRB = 0x00;   // 00000000
-       PORTB = 0x3F;  // 00111111
-
-       serial_init(9600);
-       timer_start_hz(1, 100, 1);
-
-       sei();
-
-       while(1)
-       {
-               uint8_t i, j;
-               uint16_t input = 0;
-               uint16_t valid = 0xFFF;
-
-               for(i=0; i<100; ++i)
-               {
-                       uint16_t pins = 0;
-                       for(j=0; j<100; ++j)
-                               pins |= ~((PIND>>2) | ((PINB&0x3F)<<6));
-
-                       if(i==0)
-                               input = pins;
-
-                       valid &= ~(pins^input);
-               }
-
-               input &= valid;
-               input |= state&~valid;
-               input &= (1<<(nibbles*4))-1;
-
-               if(input!=state && time_since_send>5)
-               {
-                       state = input;
-                       send_state();
-               }
-       }
-
-       return 0;
-}
-
-void receive(uint8_t c)
-{
-       if(rx_fill==0xFF)
-       {
-               if(c==':')
-                       rx_fill = 0;
-       }
-       else if(c=='.')
-       {
-               if(rx_buf[0]=='S' && rx_fill==4)
-               {
-                       offset = (decode_hex(rx_buf[1])<<8) | (decode_hex(rx_buf[2])<<4) | decode_hex(rx_buf[3]);
-                       nibbles = (offset&3)+1;
-                       offset &= 0xFFC;
-
-                       eeprom_write(0, 0xA5);
-                       eeprom_write(1, offset>>8);
-                       eeprom_write(2, offset);
-                       eeprom_write(3, nibbles);
-               }
-               rx_fill = 0xFF;
-       }
-       else
-       {
-               if(rx_fill<sizeof(rx_buf))
-                       rx_buf[rx_fill++] = c;
-               else
-                       rx_fill = 0xFF;
-       }
-}
-
-SERIAL_SET_CALLBACK(receive)
-
-void send_state(void)
-{
-       uint8_t i;
-
-       serial_write(':');
-       serial_write(hexdigit(offset>>8));
-       serial_write(hexdigit(offset>>4));
-       serial_write(hexdigit(offset|(nibbles-1)));
-       for(i=nibbles; i--;)
-               serial_write(hexdigit(state>>(i*4)));
-       serial_write('.');
-
-       time_since_send = 0;
-}
-
-void timer(void)
-{
-       ++time_since_send;
-       if(time_since_send>200)
-               send_state();
-}
-
-TIMER_SET_CALLBACK(1, timer)
-
-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;
-}