spi.c File Reference

Core SPI library. More...

#include "spi.h"
#include "core_config.h"
#include <stdint.h>
#include <stdbool.h>
#include <stm32g4xx_hal.h>
#include <stm32g4xx_hal_spi.h>
#include "clock.h"

Functions
bool	core_SPI_init (SPI_TypeDef *spi, GPIO_TypeDef *cs_port, uint16_t cs_pin)
	Initialize an SPI module and set up a CS pin for it.
bool	core_SPI_read_write (SPI_TypeDef *spi, uint8_t *txbuf, uint32_t txbuflen, uint8_t *rxbuf, uint32_t rxbuflen)
	Transmit data from a buffer on the given SPI bus and store the incoming data in a separate buffer.
bool	core_SPI_start (SPI_TypeDef *spi)
	Set the CS pin for an SPI bus low.
bool	core_SPI_stop (SPI_TypeDef *spi)
	Set the CS pin for an SPI bus high.

Variables
uint16_t	core_SPI1_CS_pin
GPIO_TypeDef *	core_SPI1_CS_port
uint16_t	core_SPI2_CS_pin
GPIO_TypeDef *	core_SPI2_CS_port
uint16_t	core_SPI3_CS_pin
GPIO_TypeDef *	core_SPI3_CS_port
uint16_t	core_SPI4_CS_pin
GPIO_TypeDef *	core_SPI4_CS_port

Detailed Description

Core SPI library.

This core library component is used to interact with SPI devices.

Function Documentation

core_SPI_init()

bool core_SPI_init	(	SPI_TypeDef *	spi,
		GPIO_TypeDef *	cs_port,
		uint16_t	cs_pin )

Initialize an SPI module and set up a CS pin for it.

Parameters

spi	The SPI module to be initialized
cs_port	Port the CS pin is located on (GPIOx)
cs_pin	CS pin (GPIO_PIN_x)

core_SPI_read_write()

bool core_SPI_read_write	(	SPI_TypeDef *	spi,
		uint8_t *	txbuf,
		uint32_t	txbuflen,
		uint8_t *	rxbuf,
		uint32_t	rxbuflen )

Transmit data from a buffer on the given SPI bus and store the incoming data in a separate buffer.

Note

The number of bytes transmitted or received on the SPI bus is the greater of txbuflen and rxbuflen. Only the number of bytes given by each parameter will be read/stored respectively.

Parameters

spi	The SPI module
txbuf	Buffer from which data to be transmitted is read
txbuflen	Number of bytes to read from the TX buffer
rxbuf	Buffer to which received data is to be stored
rxbuflen	Number of bytes to write to the RX buffer

core_SPI_start()

bool core_SPI_start

(

SPI_TypeDef *

spi

)

Set the CS pin for an SPI bus low.

Parameters

spi	The SPI module

core_SPI_stop()

bool core_SPI_stop

(

SPI_TypeDef *

spi

)

Set the CS pin for an SPI bus high.

Parameters

spi	The SPI module