Motorola MC68328 Información técnica descargar pdf (Pagina 34)

3-16 FLEX Alphanumeric Chip MC68175 Interface

Software Development

Porting FLEX One-Way Stack to the MC68328 MPU

Example 3-5 Function waitForTransfer()

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

* FUNCTION NAME: waitForTransfer() *

* Date created: 07/26/96 *

* *

* DESCRIPTIONS: *

* This function checks the SPIM_IRQ bit (in the SPI status register), *

* after data has been moved to the SPI data register to be transmitted *

* to the FLEXchip. When the SPI finishes the transmission, it sets *

* the SPIM_IRQ bit. By checking this bit, we can monitor the *

* SPI communication. *

* *

* INPUT: None *

* OUTPUT: None *

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

void waitForTransfer()

{

while (!(*spmode & SPIM_IRQ_BIT));

/* Reset SPIM */

*spmode &= SPIM_IRQ_MASK;

*spmode &= XCH_MASK;

return;

}

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Motorola MC68328 Información técnica Pagina 34