ATMEGA8L ATMEL [ATMEL Corporation], ATMEGA8L Datasheet - Page 125
ATMEGA8L
Manufacturer Part Number
ATMEGA8L
Description
8-bit AVR with 8K Bytes In-System Programmable Flash
Manufacturer
ATMEL [ATMEL Corporation]
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2486M–AVR–12/03
The following code examples show how to initialize the SPI as a Slave and how to per-
form a simple reception.
Note:
Assembly Code Example
C Code Example
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 SPSR,SPIF
rjmp SPI_SlaveReceive
; 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
r16,SPDR
(1)
(1)
ATmega8(L)
125
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