Motorola MC68328 Información técnica descargar pdf (Pagina 31)

Software Development

Porting FLEX One-Way Stack to the MC68328 MPU

FLEX Alphanumeric Chip MC68175 Interface 3-13

* This is when FLEXstack sends packets to configure FLEXchip IC.

* gInitCount keeps track of the number of configuration packets.

* Data received from FLEXchip during the configuration process

* is ignored

if (gFlag1 & INITCHIP) {

gInitCount--;

if (gInitCount == 0) {

gFlag1 &= CLEAR_INITCHIP;

gPackWrite = gPackRead;

}

* If this is the part ID packet, call FLEXstack function to process

* the part ID packet to come up with the correct Checksum packet.

if (!(BTST(gFlag1,DISPART_FIRST_f1)))

FLEXstack();

gFlag1 &= CLEAR_CMDOUT;

gFlag1 |= XFERDONE;

/* At the end of the interrupt service routine, we deselect

the FLEXchip IC */

portj_dat = (UVAR8 *) PJDATA;

*portj_dat |= DESELECT_SS;

}

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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Motorola MC68328 Información técnica Pagina 31