Stepper motor and pure avr assemby language 

Use www.costycnc.it/avr1 to compile and upload to microcontroller (arduino nano cnc shield v4): .equ RXCIE0 = 7 .equ RXEN0 = 4 .equ UCSR0B = 0xc1 .equ UCSR0C = 0xc2 .equ TXEN0 = 3 .equ UDR0 = 0xc6 .equ bps = 16000000/(16*9600) - 1 .equ UBRR0L = 0xc4 .equ UBRR0H = 0xc5 .equ UCSZ00 = 1 .equ UCSZ01 = 2 .org 0X00 jmp reset .org 0x24 ;USART, RX Complete Handler jmp receive .org 0x60 ;arduino nano cnc shield v4.0 reset: sbi 4,0 ;pin Enable as output D8 PORTB,PB0 sbi 0xa,5 ;pin STEP as output D5 PORTD,PD5 sbi 0xa,2 ;pin dir as output D5 PORTD,PD5 sbi 0xa,6 ;pin STEP as output D5 PORTD,PD5 sbi 0xa,3 ;pin dir as output D5 PORTD,PD5 cbi 5,0 ;enable DIR pin D8 -put high ldi r18,150 ldi r19,150 ldi r16,103 ldi r17,0 sts UBRR0L,r16 sts UBRR0H,r17 ldi r16 ,(1

Caso eu precise vc faz projeto sob encomenda