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Microprocessor and Microcontroller Based Systems

بسم الله الرحمن الرحيم. The Islamic University of Gaza Faculty of Engineering Electrical Engineering Department. Microprocessor and Microcontroller Based Systems. ECOM 4315 — Fall 2008. Instructor: Eng.Moayed N. EL Mobaied. Lecture 10. HEX File.

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Microprocessor and Microcontroller Based Systems

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  1. بسم الله الرحمن الرحيم The Islamic University of Gaza Faculty of Engineering Electrical Engineering Department Microprocessor and Microcontroller Based Systems ECOM 4315 — Fall 2008 Instructor: Eng.Moayed N. EL Mobaied Lecture 10

  2. HEX File .ASM file “ to transfer 5 bits from portA to portB ;************************ PROCESSOR 16f84 #include "p16f84.inc" __CONFIG _CP_OFF & _WDT_OFF & _PWRTE_ON & _XT_OSC ;****************************************************** ORG 0x00 goto Main ;****************************************************** Main bSf STATUS,RP0 movlw 0xff movwf TRISA movlw 0x00 movwf TRISB ;****************************************************** bcf STATUS,RP0 begin movf porta,0 movwf PORTB GOTO BEGIN END

  3. HEX File .HEX file “ to transfer 5 bits from portA to portB :020000040000FA :1000000001288316FF308500003086008312050822 :040010008600072837 :02400E00F13F80 :00000001FF

  4. HEX File How to Generates Hex file ;************************ PROCESSOR 16f84 #include "p16f84.inc" __CONFIG _CP_OFF & _WDT_OFF & _PWRTE_ON & _XT_OSC ;****************************************************** ORG 0x00 goto Main ;****************************************************** Main bSf STATUS,RP0 movlw 0xff movwf TRISA movlw 0x00 movwf TRISB ;****************************************************** bcf STATUS,RP0 begin movf porta,0 movwf PORTB GOTO BEGIN :020000040000FA :1000000001288316FF308500003086008312050822 :040010008600072837 :02400E00F13F80 :00000001FF MPLAB

  5. HEX File The hex file contains the machine language that deals with PIC microcontroller. General Record Format: Record Mark: each record begins with a Record Mark field containing 03AH,the ASCII code for the colon ' : ' character. Record Length: The number of bytes of information or data. Offset: By the offset we can arrive to the address. Record Type: It is used to interpret the remaining information within the record. Information or Data: It consists of zero or more bytes encoded as pairs of hexadecimal digits. The interpretation of this field depends on the Record Type field. Chick Sum: This field contains the check sum on the Record length, Load Offset, Record Type, and Information or Data.

  6. HEX File Record Type: It is used to interpret the remaining information within the record. The encoding for all the current record types are:

  7. HEX File Information or Data: It consists of zero or more bytes encoded as pairs of hexadecimal digits. The interpretation of this field depends on the Record Type field.

  8. HEX File Chick Sum: This field contains the check sum on the Record length, Load Offset, Record Type, and Information or Data. Therefore, the sum of all the ASCII pairs in a record after converting to binary, from the Record length field to and including the Chick Sum field, is zero. :020000040000FA :1000000001288316FF308500003086008312050822 :040010008600072837 :02400E00F13F80 :00000001FF 02 +0000 +04 +0000 =06 (checksum =ff-06+1=Fa)

  9. HEX File :020000040000FA :1000000001288316FF308500003086008312050822 :040010008600072837 :02400E00F13F80 :00000001FF

  10. HEX File ;************************ PROCESSOR 16f84 #include "p16f84.inc" :020000040000FA :1000000001288316FF308500003086008312050822 :040010008600072837 :02400E00F13F80 :00000001FF :02 0000 04 0000 FA

  11. HEX File __CONFIG _CP_OFF & _WDT_OFF & _PWRTE_ON & _XT_OSC :020000040000FA :1000000001288316FF308500003086008312050822 :040010008600072837 :02400E00F13F80 :00000001FF Address =2007h*2 =400E :02 400E 00 F13F 80

  12. HEX File END :020000040000FA :1000000001288316FF308500003086008312050822 :040010008600072837 :02400E00F13F80 :00000001FF :00 0000 01 FF

  13. HEX File ORG 0x00 goto Main ;****************************************************** Main bSf STATUS,RP0 movlw 0xff movwf TRISA movlw 0x00 movwf TRISB ;****************************************************** bcf STATUS,RP0 begin movf porta,0 movwf PORTB GOTO BEGIN :020000040000FA :1000000001288316FF308500003086008312050822 :040010008600072837 :02400E00F13F80 :00000001FF :10 0000 00 0128 8316 FF30850000308600 8312 0508 22 :04 0010 00 86000728 37

  14. PROGRAM MEMORY

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