Mikroelektronika MIKROE-724 データシート

mikroBasic PRO for dsPIC30/33 and PIC24

MikroElektronika

457

Soft_SPI_Init

Prototype

sub procedure Soft_SPI_Init()

Description Routine initializes the software SPI module.
Parameters None.
Returns

Nothing.

Requires

Global variables:

SoftSpi_SDI

: Data in line

SoftSpi_SDO

: Data out line

SoftSpi_CLK

: Data clock line

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.

Example

‘ DAC module connections

dim SoftSpi_CLK as sbit at LATF6_bit

dim SoftSpi_SDI as sbit at RF2_bit

dim SoftSpi_SDO as sbit at LATF3_bit

dim SoftSpi_CLK_Direction as sbit at TRISF6_bit

dim SoftSpi_SDI_Direction as sbit at TRISF2_bit

dim SoftSpi_SDO_Direction as sbit at TRISF3_bit

‘ End DAC module connections

...

Soft_SPI_Init() ‘ Init Soft_SPI

Notes

None.

Soft_SPI_Read

Prototype

sub function Soft_SPI_Read(dim data_ as byte) as byte

Description This routine performs 3 operations simultaneously. It provides clock for the Software SPI bus, reads

a byte and sends a byte.

Parameters -

sdata

: data to be sent.

Returns

Byte received via the SPI bus.

Requires

Soft SPI must be initialized before using this function. See Soft_SPI_Init routine.

Example

dim data_read, data_send as byte

...

‘ Read a byte and assign it to data_read variable

‘ (data_send byte will be sent via SPI during the Read operation)

data_read = Soft_SPI_Read(data_send)

Notes

None