Texas Instruments TMS470R1x Getting Started With the Assembler and Linker, Example 5±2. file2.asm

Getting Started With the Assembler and Linker

5.1 Getting Started With the Assembler and Linker

This section provides a quick walkthrough of the assembler and linker so that you can get started without reading the entire TMS470R1x Assembly Language Tools User's Guide. Example 5±1 through Example 5±6 show the most common methods for invoking the assembler and linker.

1)Create two short source files to use for the walkthrough; call them file1.asm and file2.asm. (See Example 5±1 and Example 5±2.)

Example 5±1. file1.asm

	.global inclw
start:	MOV	r6, #0
	MOV	r7, #0
loop:	BL	inclw
	BCC	loop

.end

Example 5±2. file2.asm

.global inclw

inclw: ADDS	r7, r7, #1
ADDCSS	r6, r6, #1
MOV	pc, lr

.end

2)Enter the following command to assemble file1.asm: asm470 file1

The asm470 command invokes the assembler. The input source file is file1.asm. (If the input file extension is .asm, you do not have to specify the extension; the assembler uses .asm as the default.)

This example creates an object file called file1.obj. The assembler creates an object file only if there are no errors in assembly. You can specify a name for the object file, but if you do not, the assembler uses the input file- name with an extension of .obj.

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