ATtiny48 datasheet(118/266 Pages) ATMEL

Part #	ATtiny48

Description	8-bit Microcontroller with 4/8K Bytes In-System Programmable Flash

PDF	266 Pages

Scroll/Zoom	100%

Manufacturer	ATMEL [ATMEL Corporation]

Direct Link	http://www.atmel.com

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118 / 266 page

118

8008C–AVR–03/09

ATtiny48/88

Note:

1. See ”About Code Examples” on page 7.

The following code examples show how to initialize the SPI as a Slave and how to perform a

simple reception.

Note:

1. See ”About Code Examples” on page 7.

C Code Example

(1)

void

SPI_MasterInit(void)

{

/* Set MOSI and SCK output, all others input */

DDR_SPI = (1<<DD_MOSI)|(1<<DD_SCK);

/* Enable SPI, Master, set clock rate fck/16 */

SPCR = (1<<SPE)|(1<<MSTR)|(1<<SPR0);

}

void

SPI_MasterTransmit(char cData)

{

/* Start transmission */

SPDR = cData;

/* Wait for transmission complete */

while

(!(SPSR & (1<<SPIF)))

;

}

Assembly Code Example

(1)

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

r16,SPDR

ret

ATtiny48 Datasheet(PDF) 118 Page - ATMEL Corporation

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