ata6616 ATMEL Corporation, ata6616 Datasheet - Page 168

• Manufacturer Part Number: ata6616
• Description: Microcontroller With Lin Transceiver, 5v Regulator And Watchdog
• Manufacturer: ATMEL Corporation

168
ATA6616/ATA6617 [Preliminary]
The following code examples show how to initialize the SPI as a Slave and how to perform a
simple reception.
Assembly Code Example
C Code Example
Note:
SPI_SlaveInit:
SPI_SlaveReceive:
void SPI_SlaveInit(void)
{
}
char SPI_SlaveReceive(void)
{
}
; Set MISO output, all others input
ldi
out
; Enable SPI
ldi
out
ret
; Wait for reception complete
sbis
rjmp
; Read received data and return
in
ret
/* Set MISO output, all others input */
DDR_SPI = (1<<DD_MISO);
/* Enable SPI */
SPCR = (1<<SPE);
/* Wait for reception complete */
while(!(SPSR & (1<<SPIF)));
/* Return data register */
return SPDR;
1. The example code assumes that the part specific header file is included.
r17,(1<<DD_MISO)
DDR_SPI,r17
r17,(1<<SPE)
SPCR,r17
SPSR,SPIF
SPI_SlaveReceive
r16,SPDR
(1)
(1)
DRAFT
9132A–AUTO–10/08