src/modules/spi.c File Reference

This is the library file for using SPI. More...

#include "sysconfig.h"
#include "spi.h"

Functions
void	SPI_MasterInit (void)
	SPI_MasterInit This function is used to Initialize the Chip's SPI as the Master.
void	SPI_CS_high (int ChipSelect)
	SPI_SlaveInit This function is used to Initialize the Chip's SPI as a Slave.
void	SPI_CS_low (int ChipSelect)
	SPI_CS_low This function is used to set a specific Chipselect to LOW.
char	SPI_MasterTransmit (int ChipSelect, char cData)
	SPI_MasterTransmit This function is used to Transmit Data via SPI (This is only working as Master, receiving is implemented as pseudo-reading) .

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Detailed Description

This is the library file for using SPI.

It contains all functions which are neccessary to handle SPI
It handles outputs/inputs with Master/Slave selecting.

It is Controller specific (only for AVR90USB)

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Function Documentation

void SPI_CS_high

(

int

ChipSelect

)

SPI_SlaveInit This function is used to Initialize the Chip's SPI as a Slave.

Parameters:

void

Returns:

void SPI_CS_high This function is used to set a specific Chipselect to HIGH

Parameters:

ChipSelect

The ChipSelect PIN we want to drive to High

Returns:

void

References SPI_PORT.

Referenced by init().

void SPI_CS_low

(

int

ChipSelect

)

SPI_CS_low This function is used to set a specific Chipselect to LOW.

Parameters:

ChipSelect

The ChipSelect PIN we want to drive to Low

Returns:

void

References SPI_PORT.

void SPI_MasterInit

(

void

)

SPI_MasterInit This function is used to Initialize the Chip's SPI as the Master.

Parameters:

void

Returns:

void

References DD_SPI_MISO, DD_SPI_MOSI, DD_SPI_SCK, DD_SPI_SS, DDR_SPI, PROPER_SPICON1, and SPI_PORT.

Referenced by main().

char SPI_MasterTransmit	(	int	ChipSelect,
		char	cData
	)

SPI_MasterTransmit This function is used to Transmit Data via SPI (This is only working as Master, receiving is implemented as pseudo-reading)
.

Parameters:

	ChipSelect	The ChipSelect PIN we need to drive to LOW to select the other Slave-Chip We drive it to HIGH again after the communication is finished.
	cData	The Byte we want to send via SPI

Returns:

char The Byte we got via pseudo-reading (SPI is a shifiting Register - so readable Data should be here)

References my_delay(), and SPI_PORT.

Referenced by get_temperature(), init_lcd(), lcd_clear(), lcd_send_bitmask(), lcd_send_char(), and lcd_set_start().