当前位置：网站首页>[VCU] Detailed S19 file (S-record)

[VCU] Detailed S19 file (S-record)

2022-08-02 14:27:00 【CynalFly】

1. 概述

2. S-record格式

1. 概述

Motorola S-record是由MotorolaA file format created,它以 ASCII十六进制Transmit binary information in text form.This file format can also be called SRECORD、SREC、S19、S28、S37.它通常用于对微控制器、EPROM and other types of programmable logic devices.

S-record格式是在1970年代中期为 Motorola 6800created by the processor.Software development tools for this processor and other embedded processors will be generatedS-recordFormat of executable code and data.Programmers will readS-recordformat and convert the data“刻录”used in embedded systemsPROM或EPROM中.

Hex is another hexadecimal format,指的是Intel-HEX,它是由Intel制定的格式.

2. S-record格式

S-record The format file consists of a series ASCII Text record composition.These records have the following structure from left to right：

type(记录类型)：2个字符,一个大写的"S"（0x53）,然后是一个数字0~9,Defines the type of record (S0,S1,S2,S3,S5,S7,S8,S9).

count(字节计数)：2个字符,16进制数字,Represents the rest of the record（address + data + checksum）的字节数（16Binary digit pair）.对于 16 Bit address field plus 1 checksum bytes,该字段的最小值为 3,最大值为 255 (0xFF).Usually recorded with 32 个数据字节.

address(地址)：4或6或8个字符.by record type type 决定.对于S1和S9类型（S19）,地址字段为 4 个十六进制数字（2 个字节）.对于S2和S8 record（S28）,地址字段为 6 个十六进制数字（3个字节）,对于S3和S7 record（S37）,地址字段为 8 个十六进制数字（4 个字节）.The address starts with MSB 发送.The address bytes are arranged in big endian format.

data(数据)：0—64字符.用来组成和说明一个代表了内存载入数据或者描述信息的16进制的值.

checksum(校验和)：2个字符.这些字符当被配对并换算成16进制数据的时候形成了一个最低有效字符节,该字符节用来表达作为补充数据,地址和数据库的字符对所代表的（字节的）补码的byte总和.即计数值、地址场和数据场的若干字符以两个字符为一对, 将它们相加求和,和的溢出部分不计,只保留最低两位字符NN,checksum =0xFF-0xNN.For a detailed checksum example,请参见示例部分.

Sending too many data bytes in one record is not recommended,Because this may increase the transfer time in case of errors.Also avoid sending only a few bytes of data per record,Because compared to the payload,The address overhead is too high.

3. S-record类型

下表描述了 10 种可能的 S 记录.S4 是保留的,当前未定义.S6 Originally reserved,But then it was redefined at some point.

记录字段	记录目的	地址字段	数据字段	记录描述
S0	标题	16 位 “0000”		This record contains vendor-specific representations as a series of pairs of hexadecimal digits ASCII 文本.The data for this record is usually viewed in the format .Text data can be anything,Include a mix of the following information：文件/模块名称、版本/修订号、日期/时间、产品名称、供应商名称、PCB memory indicator on 、版权声明.
S1	数据	16 位地址		The record contains from 16 The data at the beginning of the bit address field.This record is usually used for 8 位微控制器,例如 AVR、PIC、8051、68xx、6502、80xx、Z80.The number of bytes of data this record contains is “Byte count field”减3,其中“16位地址字段”为2个字节,“校验和字段”为1个字节.
S2	数据	24 位地址		The record contains from 24 Data starting at the bit address.The number of bytes of data this record contains is “Byte count field”减4,其中“24位地址字段”为3字节,“校验和字段”为1字节.
S3	数据	32 位地址		The record contains from 32 Data starting at the bit address.This record is usually used for 32 位微控制器,例如 ARM 和 680x0.The number of bytes of data this record contains is “Byte count field”减5,其中“32位地址字段”为4个字节,“校验和字段”为1个字节.
S4	预订的	不适用	不适用	This record has been retained.
S5	数数	16 位计数		This optional record containsS1 / S2 / S3记录的 16 位计数.If the record count is less than or equal to 65,535 (0xFFFF),then use this record,否则将使用S6记录.
S6	数数	24 位计数		This optional record containsS1 / S2 / S3记录的 24 位计数.If the record count is less than or equal to 16,777,215 (0xFFFFFF),then use this record.如果小于 65,536 (0x010000),则将使用S5记录.注意：This newer record is a recent change（Not sure if it's official）.
S7	起始地址（终止）	32 位地址		The record contains 32 The starting execution location of the bit address.This is used to terminate a seriesS3记录.如果 SREC The file is only used to program the storage device and the execution location is ignored,then zero address can be used.
S8	起始地址（终止）	24 位地址		The record contains 24 The starting execution location of the bit address.This is used to terminate a seriesS2记录.如果 SREC The file is only used to program the storage device and the execution location is ignored,then zero address can be used.
S9	起始地址（终止）	16 位地址		The record contains 16 The starting execution location of the bit address.This is used to terminate a seriesS1记录.如果 SREC The file is only used to program the storage device and the execution location is ignored,then zero address can be used.

在上表中,Can see why they call these Motorola formatsS19、S28或S37.The first number in the name represents the normal data record identifier.The second number is the end-of-file record identifier.

4. S19文件示例

下图是在ECU程序编译后生成的S19文件【Project.abs.s19】Part of the content intercepted.

S0 Record：记录类型是“S0” (0x5330).地址场没有被用,用零置位(0x0000).The information in the data field is converted into a string：“E:\VMS\test\VCU\bin\Project.abs ”.此行表示程序的开始,不需烧入memory,Just tell you the relevant information about this file,实际应用中,将工程名ProjectReplace it with the project name+版本号+Format of the description text,Easy to identify files,这样在ECUVery useful to upgrade from time to time.