Motorola MC68328 Technical Information PDF herunterladen (Seite 35)

Software Development

Porting FLEX One-Way Stack to the MC68328 MPU

FLEX Alphanumeric Chip MC68175 Interface 3-17

3.2.2 Configuring PORT.H

The PORT.H file contains most of the options and configurable items, depending on the

processor type. In

PORT.H, product engineers should add the definitions shown in

Example 3-6 when porting FLEX One-Way Stack software to the Dragonball processor:

3.2.3 Completing PORT.C

Some routines in PORT.C are product dependent and must be completed for FLEX

One-Way Stack to perform properly for a particular application. We describe some

important functionalities in this file. Recommended code is also included. However, the

product engineer should examine this code carefully, and use it basically as reference to

design applicable products.

To complete

PORT.C, three functions are called upon: FStkNotifyNewMsg() ,

Send_4_bytes() , and FLEXstack(). Code samples of the three functions are shown in

Examples 3-7 through 3-9.

Example 3-6 PORT.H Definitions

#define DRAGONBALL

#ifdef DRAGONBALL

typedef UVAR8 *ADDRESS; /* UVAR8 is an unsigned 8-bit value */

typedef UVAR8 *HANDLE;

typedef short VAR16; /* Type short is a 16-bit value */

typedef int VAR32; /* Type int is a 32-bit value */

typedef unsigned short UVAR16;

typedef unsigned int UVAR32;

#define PTR_SIZE 4 /* machine pointer size in bytes */

#define printf /* override printf */

#define ENABLE_INT asm(" ANDI.W #$F8FF,SR") /* Enable interrupts */

#define DISABLE_INT asm(" ORI.W #$0700,SR") /* Disable interrupts */

#define ATTRIB_BUF 0 /* No temp attrib buffer needed */

#endif /* DRAGONBALL */

Frees

cale Semiconductor,

Freescale Semiconductor, Inc.

For More Information On This Product,

Go to: www.freescale.com

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Motorola MC68328 Technical Information Seite 35