Mikroelektronika MIKROE-738 Datenbogen

mikroC PRO for PIC32

MikroElektronika

423

Soft_SPI_Read

Soft_SPI_Write

Prototype

unsigned short Soft_SPI_Read(char sdata);

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

unsigned short data_read;

char data_send;

...

// 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

Prototype

void Soft_SPI_Write(char sdata);

Description This routine sends one byte via the Software SPI bus.
Parameters -

sdata

: data to be sent.

Returns

Nothing.

Requires

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

Example

// Write a byte to the Soft SPI bus

Soft_SPI_Write(0xAA);

Notes

None

Library Example

This code demonstrates using library routines for Soft_SPI communication. Also, this example demonstrates working

with max7219. Eight 7 segment displays are connected to MAX7219. MAX7219 is connected to SDO, SDI, SCK pins

are connected accordingly.

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// DAC module connections

sbit Chip_Select at LATD0_bit;

sbit SoftSpi_CLK at LATD6_bit;

sbit SoftSpi_SDI at RD2_bit;

sbit SoftSpi_SDO at LATD3_bit;

sbit Chip_Select_Direction at TRISD0_bit;

sbit SoftSpi_CLK_Direction at TRISD6_bit;

sbit SoftSpi_SDI_Direction at TRISD2_bit;

sbit SoftSpi_SDO_Direction at TRISD3_bit;

// End DAC module connections