Mikroelektronika MIKROE-742 데이터 시트

Library Routines

- Soft_SPI_Init 
- Soft_SPI_Read 
- Soft_SPI_Write

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- SOFTWARE AND HARDWARE SOLUTIONS FOR EMBEDDED WORLD

CHAPTER 6

procedure Soft_SPI_Init();

Nothing.

Configures and initializes the software SPI module.

Global variables: 

- 

Chip_Select

: Chip select line 

- 

SoftSpi_SDI

: Data in line 

- 

SoftSpi_SDO

: Data out line 

- 

SoftSpi_CLK

: Data clock line 

- 

Chip_Select_Direction

: Direction of the Chip select pin 

- 

SoftSpi_SDI_Direction

: Direction of the Data in pin 

- 

SoftSpi_SDO_Direction

: Direction of the Data out pin 

- 

SoftSpi_CLK_Direction

: Direction of the Data clock pin 

must be defined before using this function.

// soft_spi pinout definition
var Chip_Select : sbit at PORTB.B0;
var SoftSpi_SDI : sbit at PINB.B6;            
var SoftSpi_SDO : sbit at PORTB.B5;           
var SoftSpi_CLK : sbit at PORTB.B7;           
var Chip_Select_Direction : sbit at DDRB.B0;
var SoftSpi_SDI_Direction : sbit at DDRB.B6;  
var SoftSpi_SDO_Direction : sbit at DDRB.B5;  
var SoftSpi_CLK_Direction : sbit at DDRB.B7;

...

Soft_SPI_Init(); // Init Soft_SPI