Description

Basic Serial Peripheral Interface Driver.

Simple, blocking SPI controller implementation for communication with external devices.

Functions
void	spi_init (void)

void	spi_deinit (void)

void	spi_writeByte (uint8_t data)

void	spi_writeHalfword (uint16_t data)

void	spi_write3Byte (uint32_t data)

uint8_t	spi_readByte (void)

uint16_t	spi_readHalfword (void)

void	spi_setCsActive (void)

void	spi_setCsInactive (void)

uint32_t	spi_getUsartPPUSATD (uint32_t *ppusatdNr)

Function Documentation

void spi_init ( void )

Initialize a USART peripheral for SPI.

void spi_deinit ( void )

De-initialize a USART peripheral for SPI.

void spi_writeByte ( uint8_t data )

Write a single byte discarding the received byte.

Parameters

[in] data The byte to send

void spi_writeHalfword ( uint16_t data )

Write two bytes discarding the received bytes.

Parameters

[in] data The bytes to send, most significant byte first

void spi_write3Byte ( uint32_t data )

Write three bytes discarding the received bytes.

Parameters

[in] data The bytes to send, most significant byte first

uint8_t spi_readByte ( void )

Read a byte by sending a 0xFF byte.

uint16_t spi_readHalfword ( void )

Read two bytes by sending two 0xFF bytes.

void spi_setCsActive ( void )

Assert the peripheral select line. Polarity is configured by spi_init .

void spi_setCsInactive ( void )

Dessert the peripheral select line. Polarity is configured by spi_init .

uint32_t spi_getUsartPPUSATD ( uint32_t * ppusatdNr )

Get PPUSATD word of the (E)USART in use.

Parameters

[out] ppusatdNr PPUSATD register number