Reorganize the directory structure

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

diff --git a/firmware/ctrl.c b/firmware/ctrl.c
deleted file mode 100644 (file)
index 0ac212e..0000000
--- a/firmware/ctrl.c
+++ /dev/null
@@ -1,221 +0,0 @@
-#include <avr/io.h>
-#include <avr/interrupt.h>
-
-#define BIT(n) (1<<(n))
-#define NOP() __asm__("nop");
-
-uint8_t digits[11] =
-{
-       0x3F,
-       0x06,
-       0x5B,
-       0x4F,
-       0x66,
-       0x6D,
-       0x7D,
-       0x07,
-       0x7F,
-       0x6F,
-       0x40
-};
-
-uint16_t read_input(void);
-uint16_t read_input_filtered(void);
-void write_serial(uint8_t);
-void write_7seg(uint8_t);
-
-uint8_t speed = 0;
-uint16_t funcs = 0;
-volatile uint8_t ticks = 0;
-volatile uint8_t rx_buf[3];
-volatile uint8_t rx_fill = 0;
-
-ISR(TIMER1_COMPA_vect)
-{
-       if(ticks<255)
-               ++ticks;
-}
-
-ISR(USART_RX_vect)
-{
-       uint8_t c = UDR0;
-       if(rx_fill==0)
-       {
-               if(c=='A' || c=='S')
-                       rx_buf[rx_fill++] = c;
-       }
-       else
-       {
-               rx_buf[rx_fill++] = c;
-               if(rx_buf[0]=='A' && rx_fill==3)
-               {
-                       uint8_t n = (rx_buf[1]-'0')*10+(rx_buf[2]-'0');
-                       write_7seg(n/10);
-                       write_7seg(n%10);
-                       rx_fill = 0;
-               }
-               else if(rx_buf[0]=='S' && rx_fill==3)
-               {
-                       speed = (rx_buf[1]-'0')*10+(rx_buf[2]-'0');
-                       rx_fill = 0;
-               }
-       }
-}
-
-int main()
-{
-       uint16_t state = 0;
-
-       DDRD = 0x02;   // 00000010
-       PORTD = 0xFC;  // 11111100
-       DDRB = 0x3F;   // 00111111
-       PORTB = 0x0F;  // 00001111
-
-       write_7seg(10);
-       write_7seg(10);
-
-       // 9600 baud, 8N1
-       UBRR0H = 0;
-       UBRR0L = 103;
-       UCSR0C = BIT(UCSZ00) | BIT(UCSZ01);
-       UCSR0B = BIT(RXEN0) | BIT(TXEN0) | BIT(RXCIE0);
-
-       TCCR1A = 0;
-       TCCR1B = BIT(WGM12) | BIT(CS12);
-       OCR1AH = 24;
-       OCR1AL = 106;
-       TIMSK1 = BIT(OCIE1A);
-
-       sei();
-
-       while(1)
-       {
-               uint16_t toggled;
-               uint8_t i;
-               uint16_t input;
-
-               input = read_input_filtered();
-               input ^= 0xFFFC;
-
-               toggled = state^input;
-               state = input;
-
-               if((toggled&3)==2 && (state&1))
-               {
-                       uint8_t action = 0;
-                       if(state&2)
-                       {
-                               if(speed<14)
-                               {
-                                       ++speed;
-                                       action = 1;
-                               }
-                       }
-                       else
-                       {
-                               if(speed>0)
-                               {
-                                       --speed;
-                                       action = 1;
-                               }
-                               else if(ticks>10)
-                                       action = 2;
-                       }
-
-                       if(action==1)
-                       {
-                               write_serial('S');
-                               write_serial('0'+speed/10);
-                               write_serial('0'+speed%10);
-                       }
-                       else if(action==2)
-                               write_serial('R');
-
-                       ticks = 0;
-               }
-
-               for(i=0; i<14; ++i)
-               {
-                       uint16_t bit = 4<<i;
-                       if(toggled&~state&bit)
-                       {
-                               if(i==0)
-                                       write_serial('N');
-                               else if(i==1)
-                                       write_serial('P');
-                               else
-                               {
-                                       uint8_t f = i-2;
-                                       uint16_t fbit = 1<<f;
-                                       funcs ^= fbit;
-                                       write_serial((funcs&fbit) ? 'H' : 'L');
-                                       write_serial('0'+f);
-                               }
-                       }
-               }
-       }
-}
-
-uint16_t read_input(void)
-{
-       uint8_t row;
-       uint16_t input = 0;
-
-       for(row=0; row<4; ++row)
-       {
-               uint8_t pins;
-
-               PORTB = (PORTB|0x0F)&~(1<<row);
-               NOP();
-               NOP();
-               NOP();
-               NOP();
-               NOP();
-               NOP();
-               pins = PIND>>2;
-               input |= pins&3;
-               input |= (pins&0x3C)<<(row*4);
-       }
-
-       return input;
-}
-
-uint16_t read_input_filtered(void)
-{
-       uint16_t valid = 0xFFFF;
-       uint16_t prev;
-       uint16_t input;
-       uint8_t i;
-
-       prev = read_input();
-       for(i=0; i<20; ++i)
-       {
-               input = read_input();
-               valid &= ~(input^prev);
-               prev = input;
-       }
-
-       return input&valid;
-}
-
-void write_serial(uint8_t c)
-{
-       while(!(UCSR0A&(1<<UDRE0))) ;
-       UDR0 = c;
-}
-
-void write_7seg(uint8_t n)
-{
-       uint8_t segs = ~digits[n];
-       uint8_t i;
-       for(i=0; i<8; ++i)
-       {
-               PORTB &= ~0x20;
-               if(segs&0x80)
-                       PORTB |= 0x10;
-               else
-                       PORTB &= ~0x10;
-               PORTB |= 0x20;
-               segs <<= 1;
-       }
-}