參數(shù)資料
型號: DRM041
英文描述: Building an USB-DDC ICP Interface Board HardwareReference Design
中文描述: 構(gòu)建的USB接口板DDC的備HardwareReference設(shè)計
文件頁數(shù): 65/80頁
文件大?。?/td> 1025K
代理商: DRM041
DRM040 — Rev 0
Designer Reference Manual
MOTOROLA
65
Designer Reference Manual — DRM040
Appendix C — Mixing assembly and ‘C’ code
C.1 Generating Assembler Include files (Option -La)
This option allows both compiler and assembler to use a single common
file to share constants, variables/labels and even structure fields. The
basic concept is that the compiler writes an output file in the format of the
assembler, which contains all required information of the C header file.
The method of enabling this option and a summary of the mappings
supported is shown below. Refer to the appendix and the ANSI-C
front-end section of the HC08 compiler manual for further details:
C.1.1 General use:
Two specific actions are required to output the assembly file. The first is
to select the compilers –La option and the second is to include the
#pragma CREATE_ASM_LISTING ON in the header file that is to be
mapped and emitted. All macro definitions and declarations that appear
after the #pragma shall be emitted (assuming compiler –La option has
been selected). The compiler stops emitting after the #pragma
CREATE_ASM_LISTING OFF. It should be noted that not all entries in
a header file generate legal assembly constructs and the compiler does
not check for legal assembly syntax when translating.
C.2 Header file example:
test.h
#pragma CREATE_ASM_LISTING ON
typedef struct {
short i;
short j;
} Struct;
Struct Var;
F
Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
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