SPIDriver

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)
 

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]dataThe byte to send
void spi_writeHalfword ( uint16_t  data)

Write two bytes discarding the received bytes.

Parameters
[in]dataThe bytes to send, most significant byte first
void spi_write3Byte ( uint32_t  data)

Write three bytes discarding the received bytes.

Parameters
[in]dataThe bytes to send, most significant byte first
uint8_t spi_readByte ( void  )

Read a byte by sending a 0xFF byte.

Returns
The received byte
uint16_t spi_readHalfword ( void  )

Read two bytes by sending two 0xFF bytes.

Returns
The received bytes, most significant byte first
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.