ABL electronic PIC12 Benutzerhandbuch

mikroC provides library which implement software SPI. These routines are hard-
ware independent and can be used with any MCU. You can easily communicate
with other devices via SPI: A/D converters, D/A converters, MAX7219, LTC1290,
etc.

Note: These functions implement time-based activities, so interrupts need to be
disabled when using the library.

Soft_Spi_Config

Soft_Spi_Read

Soft_Spi_Write

mikroC - C Compiler for Microchip PIC microcontrollers

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Soft_Spi_Config(char *port, const char SDI, const char SD0,

SCK);

Configures and initializes software SPI. Parameter port specifies port of MCU on which
SDI, SDO, and SCK pins will be located. Parameters 

SDI

, 

SDO

, and 

SCK

need to be in

range 0–7 and cannot point at the same pin.

Soft_Spi_Config

needs to be called before using other functions from Soft SPI

Library.

This will set SPI to master mode, clock = 50kHz, data sampled at the middle of interval,
clock idle state low and data transmitted at low to high edge. SDI pin is RB1, SDO pin
is RB2 and SCK pin is RB3:

Soft_Spi_Config(PORTB, 1, 2, 3);