intel hex format

intel hex format

intel hex file의 예.

:10008000AF5F67F0602703E0322CFA92007780C361 :1000900089001C6B7EA7CA9200FE10D2AA00477D81 :0B00A00080FA92006F3600C3A00076CB :00000001FF

위를 살펴보면

• 첫번째 character (:)는 record start를 의미한다
• 다음의 2 character는 record의 길이(length)를 말한다. 여기서는 0x10(16byte hex == 32 byte ascii hex)
• 다음의 4 character는 load되는 번지를 말한다. 여기서는 0x0080
• 다음의 2 character는 record type을 말한다. (아래를 참조)
• 다음의 32 character는 record length에서 가리킨 data를 말함
• 마지막 2 character는 checksum을 말함(sum of all bytes + checksum = 00).

Record types:

• 00 - Data record
• 01 - End of file record
• 02 - Extended segment address record
• 03 - Start segment address record
• 04 - Extended linear address record
• 05 - Start linear address record

 

 

* Extended linear address record(0x04) 

 

 

예):0200000400609A
 :10000000B800008ED08ED88EC0BC00C0B864668E9A

 

여기서 ULBA란 Upper Linear Base Address란 말의 줄임말이다.16bit 초과한 32bit 까지의 addressing에 대한 표현을 ULBA를 통해서 한다 

위의 예에서 실제 hex값의 번지는

  0x0060 (upper address) + 0x0000( lower address) ,즉 0x600000 부터의 값을 의미한다.

 

 

아래 싸이트 보고 내용을 추가하면 

https://jimmywongiot.com/2021/04/20/format-of-intelhex/

Extended Segment Address Records (HEX86)

Extended segment address records-also known as HEX86 records-contain bits 4-19 of the data address segment. The extended segment address record always has two data bytes and appears as follows:

:020000021200EA

where:

• 02 is the number of data bytes in the record.
• 0000 is the address field. For the extended segment address record, this field is always 0000.
• 02 is the record type 02 (an extended segment address record).
• 1200 is the segment of the address.
• EA is the checksum of the record and is calculated as
  01h + NOT(02h + 00h + 00h + 02h + 12h + 00h).

 

:020000021200EA

:10246200464C5549442050524F46494C4500464C33

 

이럴경우 실제 어드레스는

Address from the data record's address field     2462
Extended segment address record data field       1200
                                             --------
Absolute memory address                      00014462

 

 

 

End-of-File (EOF) Records

An Intel HEX file must end with an end-of-file (EOF) record. This record must have the value 01 in the record type field. An EOF record always appears as follows:

:00000001FF

where:

• 00 is the number of data bytes in the record.
• 0000 is the address where the data are to be located in memory. The address in end-of-file records is meaningless and is ignored. An address of 0000h is typical.
• 01 is the record type 01 (an end-of-file record).
• FF is the checksum of the record and is calculated as
  01h + NOT(00h + 00h + 00h + 01h).

Format of IntelHex