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Working with the assembler

AN3350

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Doc ID 018512 Rev 2

Working with the assembler

This chapter explains the enhanced Time Processing Unit (eTPU) assembler, and shows

you how to use it with assembly source code.

This chapter contains these topics:

●

Understanding the eTPU assembler

●

Using the command-line assembler

●

Assembly file layout

●

Instructions and directives

●

eTPU assembler preprocessor

10.1

Understanding the eTPU assembler

The eTPU assembler processes assembly-language source statements written for

SPC56xx family of communication microcontrollers. The assembler translates source

statements into object files with a format compatible with other eTPU assembler software

and hardware products.

The assembler processes assembly source files by reading the contents and preprocessing

each line, as described in Section 10.5: eTPU assembler preprocessor.

The assembler parses each line of code (as described in Section 10.3: Assembly file layout)

in order to verify correct syntax. It then encodes all recognized instructions and directives as

object code in the specified output layout.

10.2

Using the command-line assembler

This section shows you how to invoke the assembler from the command line, for files

outside of an integrated development environment (IDE).

To run the assembler command-line executable, type the full path to the executable at the

Windows command prompt.

Optionally, you can add the path of the eTPU tools folder to your PATH environment variable.

Then you can simply enter the name of the tool, etpu_bins.exe, to run the assembler.

10.2.1

etpu_bins

etpu_bins is a wrapper used for all binary utilities such as assembling and linking.

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Assembler is invoked with etpu_bins --asm inputFile

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Linker is invoked using etpu_bins --ld inputFile

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Disassembler is invoked using etpu_bins --elfdump inputFile

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Size utility is used with etpu_bins --size inputFile

The remaining chapter relates to the assembler tool. The linker behaviour is described in the

next chapter. A single input file is allowed. The -i (pre-include) option can be used to

specify more input files.

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