Mikroelektronika MIKROE-742 데이터 시트

SPI1_Init_Advanced

375

MIKROELEKTRONIKA

- SOFTWARE AND HARDWARE SOLUTIONS FOR EMBEDDED WORLD

Libraries

mikroPASCAL PRO for AVR

CHAPTER 6

Prototype

procedure SPI1_Init_Advanced(mode : byte; fcy_div : byte;
and_edge : byte)

Returns

Nothing.

Description

Configures and initializes SPI. SPI1_Init_Advanced or SPI1_Init needs to be
called before using other functions of SPI Library.

Parameters

mode, fcy_div

and

clock_and_edge

determine the work mode for

SPI, and can have the following values:

Note: Some SPI clock speeds are not supported by all AVR MCUs and these
are: Fosc/2, Fosc/8, Fosc/32. Please consult appropriate datasheet.

Mask

Description

Predefined library const

SPI mode constants:

0x10

Master mode

_SPI_MASTER

0x00

Slave mode

_SPI_SLAVE

Clock rate select constants:

0x00

Sck = Fosc/4, Master mode

_SPI_FCY_DIV4

0x01

Sck = Fosc/16, Master mode _SPI_FCY_DIV16

0x02

Sck = Fosc/64, Master mode _SPI_FCY_DIV64

0x03

Sck = Fosc/128, Master mode _SPI_FCY_DIV128

0x04

Sck = Fosc/2, Master mode

_SPI_FCY_DIV2

0x05

Sck = Fosc/8, Master mode

_SPI_FCY_DIV8

0x06

Sck = Fosc/32, Master mode _SPI_FCY_DIV32

SPI clock polarity and phase constants:

0x00

Clock idle level is low,
sample on rising edge

_SPI_CLK_LO_LEADING

0x04

Clock idle level is low,
sample on falling edge

_SPI_CLK_LO_TRAILING

0x08

Clock idle level is high,

sample on rising edge

_SPI_CLK_HI_LEADING

0x0C

Clock idle level is high,

sample on falling edge

_SPI_CLK_HI_TRAILING