mirror of
https://github.com/sergeyyarkov/attiny2313a_thermostat.git
synced 2026-10-11 10:18:56 +03:00
113 lines
3.3 KiB
NASM
113 lines
3.3 KiB
NASM
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; Project name: thermostat
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; Description: Electronic thermostat on AVR Microcontroller
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; Source code: https://github.com/sergeyyarkov/attiny2313a_thermostat
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; Device: ATtiny2313A
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; Device Datasheet: http://ww1.microchip.com/downloads/en/DeviceDoc/doc8246.pdf
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; Package: SOIC-20W_7.5x12.8mm_P1.27mm
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; Assembler: AVR macro assembler 2.2.7
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; Clock frequency: 12 MHz External Crystal Oscillator
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; Fuses: lfuse: 0x4F, hfuse: 0x9F, efuse: 0xFF, lock: 0xFF
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;
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; Written by Sergey Yarkov 22.01.2023
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.INCLUDE "tn2313Adef.inc"
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.LIST
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.DEF tmp_r_a = r16
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;========================================;
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; LABELS ;
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;========================================;
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.EQU LED_POWER_PORT = PD6
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;========================================;
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; CODE SEGMENT ;
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;========================================;
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.CSEG
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.ORG 0x00
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;========================================;
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; VECTORS ;
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;========================================;
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rjmp RESET_vect ; Program start at RESET vector
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reti ; External Interrupt Request 0 / inactive
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reti ; External Interrupt Request 1 / inactive
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reti ; Timer/Counter1 Capture Event / inactive
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reti ; Timer/Counter1 Compare Match A / inactive
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reti ; Timer/Counter1 Overflow / inactive
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reti ; Timer/Counter0 Overflow / inactive
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reti ; USART0, Rx Complete / inactive
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reti ; USART0 Data Register Empty / inactive
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reti ; USART0, Tx Complete / inactive
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reti ; Analog Comparator / inactive
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reti ; Pin Change Interrupt Request 0/ inactive
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reti ; Timer/Counter1 Compare Match B / inactive
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reti ; Timer/Counter0 Compare Match A / inactive
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reti ; Timer/Counter0 Compare Match B / inactive
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reti ; USI Start Condition/ inactive
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reti ; USI Overflow / inactive
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reti ; EEPROM Ready/ inactive
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reti ; Watchdog Timer Overflow / inactive
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reti ; Pin Change Interrupt Request 1 / inactive
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reti ; Pin Change Interrupt Request 2 / inactive
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RESET_vect:
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;
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; INIT STACK POINTER
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ldi tmp_r_a, low(RAMEND)
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out SPL, tmp_r_a
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MCU_INIT:
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rcall INIT_PORTS
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rjmp LOOP
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INIT_PORTS:
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ldi r16, (1<<LED_POWER_PORT)
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out DDRD, r16
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out PORTD, r16
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ret
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;========================================;
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; MAIN PROGRAM LOOP ;
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;========================================;
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LOOP:
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ldi r16, (1<<LED_POWER_PORT)
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out PORTD, r16
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rcall DELAY
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rcall DELAY
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ldi r16, (0<<LED_POWER_PORT)
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out PORTD, r16
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rcall DELAY
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rcall DELAY
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rjmp LOOP
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DELAY:
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ldi r16, 255 ; 1 clock cycle
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_DEL_1:
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ldi r17, 255 ; 1 clock cycle
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_DEL_2:
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dec r17 ; 1 clock cycle
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nop ; 1 clock cycle
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brne _DEL_2 ; 2 clock cycle when jumping / 1 when continue
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dec r16 ; 1 clock cycle
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brne _DEL_1 ; 2 clock cycle when jumping / 1 when continue
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ret
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INFO: .DB "AVR Thermostat. Written by Sergey Yarkov 22.01.2023"
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;========================================;
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; EEPROM SEGMENT ;
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;========================================;
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.ESEG |