Rainbow-electronics ATmega64M1 Manuel d'utilisateur télécharger pdf (Page 158)

100

101

158

8209A–AVR–08/09

ATmega16M1/32M1/64M1

Note: 1. The example code assumes that the part specific header file is included.

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

in r16,SPDR

ret

C Code Example

(1)

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;

}

1 2 ... 153 154 155 156 157 158 159 160 161 162 163 ... 342 343

Commentaires sur ces manuels

Pas de commentaire

Rainbow-electronics ATmega64M1 Manuel d'utilisateur Page 158

Commentaires sur ces manuels

Produits connexes et manuels pour Capteurs Rainbow-electronics ATmega64M1