[ บทความ : ตัวอย่างสำหรับ AVR ตอนที่ 1 ] ทดสอบ ET-AVR V1

ซอร์สโค้ดสำหรับทดสอบการทำงานของบอร์ด V1 มีรายละเอียดดังนี้ ...

;*************************************************************************** ;* A P P L I C A T I O N N O T E F O R T H E A V R F A M I L Y * ;* * ;* Number :AVR * ;* File Name :"TestV1.asm" * ;* Title :READ ADC chanel 1 to RS232 * ;* Date :2/3/42 * ;* Version :1.0 * ;* Support telephone :712 1120-1 (ETT) * ;* Support fax :3917216 (ETT) * ;* Support www :www.etteam.com,www.ett.co.th * ;* Target MCU :AT90S8535/AT90LS8535 * ;* * ;*************************************************************************** ; .include "8535def.inc" .org $0000 rjmp RESET ;Reset Handle ;**************************************************************************** ;* * ;* Test/Example Program * ;* * ;**************************************************************************** ; .def temp = r19 ; RESET: ldi temp,low(RAMEND) out SPL,temp ;init Stack Pointer Low ldi temp,high(RAMEND) out SPL+1,temp ;init Stack Pointer High cli ;clear golbal interrupt cbi UCR,RXCIE ;clesr rx interrupt cbi UCR,TXCIE ;clesr tx interrupt cbi UCR,UDRIE ;clesr data empty interrupt cbi UCR,CHR9 ;send 8 data ldi r17,51 out UBRR,r17 ;baud 9600 at 8MHz Xtal sbi UCR,TXEN ;set pin tx as serial TX ldi r17,0x00 ;set porta as Hi impledance out DDRA,r17 out PORTA,r17 cbi ADCSR,ADFR ;select single conversion rcall sendch xx: rjmp xx ;*************************************************** ;* program read data for ADC * ;*************************************************** ATOD: in r21,ADCL ;read low byte in r22,ADCH ;read high byte mov r23,r21 andi r22,0x03 ;detect 3 bit low of ADCH ldi ZH,high(HEXTBL*2) ;get high of pointer ldi ZL,low(HEXTBL*2) ;get low of pointer add r30,r22 ldi r22,0 adc r31,r22 lpm ;get data from program memory mov r20,r0 ;put data to rs232 rcall TX232 swap r21 andi r21,0x0F ;detect 4 bit high of ADCL ldi ZH,high(HEXTBL*2) ;get high of pointer ldi ZL,low(HEXTBL*2) ;get low of pointer add r30,r21 ldi r21,0 adc r31,r21 lpm ;get data from program memory mov r20,r0 ;put data to rs232 rcall TX232 andi r23,0x0F ;detect 4 bit low of ADCL ldi ZH,high(HEXTBL*2) ;get high of pointer ldi ZL,low(HEXTBL*2) ;get low of pointer add r30,r23 ldi r23,0 adc r31,r23 lpm ;get data from program memory mov r20,r0 ;put data to rs232 rcall TX232 ret ;*************************************** ;* subrutine for show adc on pc * ;*************************************** sendch: ldi r20,0x0c rcall TX232 ldi r16,64 ldi ZH,high(CH0*2) ldi ZL,low(CH0*2) send1: lpm adiw ZL,1 mov r20,r0 rcall TX232 dec r16 brne send1 ldi r20,0x0a rcall TX232 ldi r20,0x0d rcall TX232 send3: ldi r18,8 ldi r17,0x00 ;start chanl 0 ADC send2: out ADMUX,r17 sbi ADCSR,ADEN ;enable ADC sbi ADCSR,ADSC ;start conversion send4: sbis ADCSR,ADIF rjmp send4 rcall ATOD ldi r20,0x20 rcall TX232 rcall TX232 rcall TX232 rcall TX232 rcall TX232 inc r17 dec r18 brne send2 ldi r20,0x0d rcall TX232 rcall switch rcall p72io rjmp send3 ret ;**************************** ;* PROGRAM READKEY * ;* * ;* key : portc * ;* led : portb * ;**************************** switch: ser r16 out DDRD,r16 ;set portb as output clr r16 out DDRC,r16 ;set portc as input ser r16 out PORTC,r16 switch1: in r26,PINC ;read portc key from portc out PORTD,r26 ;show press key ret p72io: ldi r17,0xff ;set port b,c,d as output out DDRB,r17 out DDRC,r17 out DDRD,r17 ;************************************* ;* P72ioZ80 * ;************************************* loop1: ldi r17,0b10101010 out PORTB,r17 rcall delay rcall delay ldi r17,0b01010101 out PORTB,r17 rcall delay rcall delay ret ;************************************ ;* delay program * ;************************************ delay: ldi r22,0x04 dly1: ldi r23,0x0ff dly2: ldi r24,0x0ff dly3: dec r24 brne dly3 dec r23 brne dly2 dec r22 brne dly1 ret TX232: sbis USR,UDRE ;wait until UDRE = 1 rjmp TX232 out UDR,r20 ;send data to serial ret RX232: sbis USR,RXC ;wait until have data in buffer rjmp RX232 in r20,UDR ;read data from buffer rcall TX232 ret .CSEG HEXTBL: .db 0x30,0X31 ;table for convert hex to ascii .db 0X32,0X33 .db 0X34,0X35 .db 0X36,0X37 .db 0X38,0X39 .db 0X41,0X42 .db 0X43,0X44 .db 0X45,0X46 .CSEG CH0: .db 0x43,0x48,0x30,0x20,0x20,0x20,0x20,0x20 .db 0x43,0x48,0x31,0x20,0x20,0x20,0x20,0x20 .db 0x43,0x48,0x32,0x20,0x20,0x20,0x20,0x20 .db 0x43,0x48,0x33,0x20,0x20,0x20,0x20,0x20 .db 0x43,0x48,0x34,0x20,0x20,0x20,0x20,0x20 .db 0x43,0x48,0x35,0x20,0x20,0x20,0x20,0x20 .db 0x43,0x48,0x36,0x20,0x20,0x20,0x20,0x20 .db 0X43,0x48,0x37,0x20,0x20,0x20,0x20,0x20

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