ATAVRSB202 Atmel, ATAVRSB202 Datasheet - Page 102

• Manufacturer Part Number: ATAVRSB202
• Description: KIT BATT MGMT FOR ATMEGA32HVB
• Manufacturer: Atmel

Specifications of ATAVRSB202

• Main Purpose: *
• Embedded: *
• Utilized Ic / Part: *
• Primary Attributes: *
• Secondary Attributes: *
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

8042B–AVR–06/10
The following code examples show how to initialize the SPI as a Slave and how to perform a
simple reception.
Note:
Assembly Code Example
C Code Example
void SPI_SlaveInit(void)
{
}
char SPI_SlaveReceive(void)
{
}
SPI_SlaveInit:
; Set MISO output, all others input
ldi
out
; Enable SPI
ldi
out
ret
SPI_SlaveReceive:
; Wait for reception complete
in r16,SPSR
sbrs r16,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. See “About Code Examples” on page 8.
;
r17,(1<<DD_MISO)
DDR_SPI,r17
r17,(1<<SPE)
SPCR,r17
r16,SPDR
(1)
(1)
ATmega16HVB/32HVB
102