Motorola MC68328 Informações Técnicas descarregar pdf (Página 30)

3-12 FLEX Alphanumeric Chip MC68175 Interface

Software Development

Porting FLEX One-Way Stack to the MC68328 MPU

if (!(gFlag1 & INITCHIP)){ /* Normal mode */

if (gFlag1 & CMDOUT){ /* Send 4 bytes from the gCommand */

ptr = (UVAR8*) &data1;

*ptr++ = gCmdBuffer.byte3;

*ptr = gCmdBuffer.byte2;

ptr = (UVAR8*) &data2;

*ptr++ = gCmdBuffer.byte1;

*ptr = gCmdBuffer.byte0;

}

else{ /* Send 4 bytes from gSecurity */

ptr = (UVAR8*) &data1;

*ptr++ = gSecurity.byte3;

*ptr = gSecurity.byte2;

ptr = (UVAR8*) &data2;

*ptr++ = gSecurity.byte1;

*ptr = gSecurity.byte0;

}

else{ /* This is when FlexIC is initialized the first time */

ptr = (UVAR8*) &data1;

*ptr++ = gInitData[gPointer++];

*ptr = gInitData[gPointer++];

ptr = (UVAR8*) &data2;

*ptr++ = gInitData[gPointer++];

*ptr = gInitData[gPointer++];

}

* FLEXchip and Host processor exchange data

FlexSPITransfer(&data1, &data2);

/* Store receiving data from FLEXchip in the queue */

storeData(data1, data2);

Example 3-2 Function FLEX IC Handler (Continued)

Frees

cale Semiconductor,

Freescale Semiconductor, Inc.

For More Information On This Product,

Go to: www.freescale.com

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