參數(shù)資料
型號: S80C32-44:RD
廠商: ATMEL CORP
元件分類: 微控制器/微處理器
英文描述: 8-BIT, 44 MHz, MICROCONTROLLER, PQCC44
封裝: PLASTIC, LCC-44
文件頁數(shù): 29/152頁
文件大?。?/td> 2528K
124
2486AA–AVR–02/2013
ATmega8(L)
The following code examples show how to initialize the SPI as a Slave and how to perform a
simple reception.
Note:
Assembly Code Example
SPI_SlaveInit:
; Set MISO output, all others input
ldi
r17,(1<<DD_MISO)
out
DDR_SPI,r17
; Enable SPI
ldi
r17,(1<<SPE)
out
SPCR,r17
ret
SPI_SlaveReceive:
; Wait for reception complete
sbis
SPSR,SPIF
rjmp
SPI_SlaveReceive
; Read received data and return
in
r16,SPDR
ret
C Code Example
void
SPI_SlaveInit(void)
{
/* Set MISO output, all others input */
DDR_SPI = (1<<DD_MISO);
/* Enable SPI */
SPCR = (1<<SPE);
}
char
SPI_SlaveReceive(void)
{
/* Wait for reception complete */
while
(!(SPSR & (1<<SPIF)))
;
/* Return data register */
return
SPDR;
}
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