Atmel AVR ATtiny13a as TV remote control IR receiver (assembly code) скачать в хорошем качестве

Atmel AVR ATtiny13a as TV remote control IR receiver (assembly code)

In this video I go over the assembly code for Atmel ATtiny13a that interprets IR signals received from a TV remote control. I also demonstrate how to program the ATtiny13a chip with an Arduino Uno as the programmer. Assembly code for ATtiny 13a: clr r1 // setupPort: ldi r16, 0b11110000 // PB0-input, PB4-output out DDRB, r16 // setupTimer: ldi r16, 0b00000000 out TCCR0A,r16 ldi r16, 0b00000101 // prescaler 9.6MHz/1024 out TCCR0B,r16 // start: in r17, PINB andi r17, 0b00000001 out TCNT0, r1 poll: mov r16, r17 in r17, PINB // two consecutive sample readings andi r17, 0b00000001 cp r16, r17 brne toggle rjmp poll toggle: cpi r17, 0x00 // evaluate only high-voltage pulses breq poll in r18, TCNT0 cpi r18, 9 // 0-8 cycles - skip brlo poll cpi r18, 12 // 9-11 cycles - binary zero brlo binaryZero cpi r18, 19 // 12-18 cycles - skip brlo poll cpi r18, 23 // 19-23 cycles - binary one brlo binaryOne rjmp reset // 23+ cycles - reset binaryZero: ldi r19, 0b00000000 rjmp updateResult binaryOne: ldi r19, 0b00000001 rjmp updateResult updateResult: lsl r21 // shift bits left or r21, r19 // put new value in bit 0 out TCNT0, r1 rjmp poll reset: cpi r21, 0x79 // was it the blue button that was pushed? 0x61 inverse is 0x79 (ASCII 'y') brne finish ldi r21, 0b00010000 out PINB, r21 // blue button was pushed, toggle PB4 finish: clr r21 out TCNT0, r1 rjmp poll Assembly code for Arduino Uno: clr r1 // setupPort: ldi r16, 0b11110000 // PB0-input, PB5-output out DDRB, r16 // setupUART: sts UBRR0H, r1 ldi r16, 0x67 sts UBRR0L, r16 ldi r16, 0x48 sts UCSR0B, r16 ldi r16, 0x06 sts UCSR0C, r16 // setupTimer: ldi r16, 0b00000000 out TCCR0A,r16 ldi r16, 0b00000101 // prescaler 16MHz/1024 out TCCR0B,r16 // start: in r17, PINB andi r17, 0b00000001 out TCNT0, r1 poll: mov r16, r17 in r17, PINB // two consecutive sample readings andi r17, 0b00000001 cp r16, r17 brne toggle rjmp poll toggle: cpi r17, 0x00 // evaluate only high-voltage pulses breq poll in r18, TCNT0 cpi r18, 15 // 0-14 cycles - skip brlo poll cpi r18, 20 // 15-19 cycles - binary zero brlo binaryZero cpi r18, 32 // 20-31 cycles - skip brlo poll cpi r18, 38 // 32-37 cycles - binary one brlo binaryOne rjmp reset // 38+ cycles - reset binaryZero: ldi r19, 0b00000000 ldi r20, 0x30 // ASCII '0' rjmp updateResult binaryOne: ldi r19, 0b00000001 ldi r20, 0x31 // ASCII '1' rjmp updateResult updateResult: sts UDR0, r20 // display ASCII lsl r21 // shift bits left or r21, r19 // put new value in bit 0 out TCNT0, r1 rjmp poll reset: ldi r20, 0x0D // carriage return sts UDR0, r20 sts UDR0, r21 // display result, ASCII of inverse binary value cpi r21, 0x79 // was it the blue button that was pushed? 0x61 inverse is 0x79 (ASCII 'y') brne finish ldi r21, 0b00100000 out PINB, r21 // blue button was pushed, toggle PB5 (built-in LED) finish: clr r21 out TCNT0, r1 rjmp poll -----------------------------------