Motorola MC68328 Informações Técnicas descarregar pdf (Página 38)

3-20 FLEX Alphanumeric Chip MC68175 Interface

Software Development

Porting FLEX One-Way Stack to the MC68328 MPU

3.2.4 Setting up Initialization Buffer

The host software must provide initialization data to the FLEX One-Way Stack software

in a predefined format for the software for configure the IC after enabling it. The

initialization buffer is set up by function BuildInitBuffer(), as illustrated in Example 3-10.

This function is part of FLEX One-Way Stack software and can be found in data.c.

Please note that data should usually be placed directly in a reserved EPROM section for

code optimization. However, to better illustrate how the buffer is set up, we define

structures and hard-code the initialization data in function BuildInitBuffer(). The host

software must call this function right after enabling the FLEX Alphanumeric Chip.

Example 3-10 Function BuildInitBuffer()

/************************************************************************

* FUNCTION NAME: BuildInitBuffer() *

* Date created: 07/26/96 *

* *

* Description: *

* This function dynamically stores data in the initialization *

* buffer. Note that this function is designed for software testing, *

* and better illustration of how the initialization buffer is *

* constructed. For users' end-products, initialization data can be *

* stored in EEPROM for better performance and reducing code size. *

* *

* INPUT: None *

* OUTPUT: None *

* *

* GLOBAL VARIABLES: *

* init_buffer: Pointer to the beginning of the *

* initialization buffer. *

***********************************************************************/

void BuildInitBuffer()

{

volatile FS_DRIVER_STRUCT *ptr1;

volatile E_NOTIFY_STRUCT *ptr2;

volatile MMLITE_STRUCT *ptr3;

volatile FILTER_STRUCT *ptr4;

volatile FLEXCHIP_STRUCT *ptr5;

Frees

cale Semiconductor,

Freescale Semiconductor, Inc.

For More Information On This Product,

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