File syn_spi.c

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Hardware-decoupled SPI driver implementation.

• #include "../util/syn_assert.h"
• #include "syn_spi.h"
• #include <string.h>

Public Functions

Type	Name
SYN_Status	syn_spi_deinit (SYN_SPI * spi) De-initialize an SPI instance.
SYN_Status	syn_spi_init (SYN_SPI * spi, const SYN_SPI_Config * cfg) Initialize an SPI instance.
SYN_Status	syn_spi_read (SYN_SPI * spi, uint8_t * rx, size_t len) Read bytes in over SPI (transmits dummy 0xFF bytes).
SYN_Status	syn_spi_transfer (SYN_SPI * spi, const uint8_t * tx, uint8_t * rx, size_t len) Full-duplex simultaneous SPI transmit and receive.
SYN_Status	syn_spi_write (SYN_SPI * spi, const uint8_t * tx, size_t len) Write bytes out over SPI (discards incoming RX bytes).

Public Functions Documentation

function syn_spi_deinit

De-initialize an SPI instance.

SYN_Status syn_spi_deinit (
    SYN_SPI * spi
) 

Parameters:

• spi Pointer to SYN_SPI handle.

Returns:

SYN_OK on success.

---

function syn_spi_init

Initialize an SPI instance.

SYN_Status syn_spi_init (
    SYN_SPI * spi,
    const SYN_SPI_Config * cfg
) 

Parameters:

• spi Pointer to SYN_SPI handle.
• cfg Configuration structure.

Returns:

SYN_OK on success.

---

function syn_spi_read

Read bytes in over SPI (transmits dummy 0xFF bytes).

SYN_Status syn_spi_read (
    SYN_SPI * spi,
    uint8_t * rx,
    size_t len
) 

Parameters:

• spi Pointer to initialized SPI handle.
• rx RX destination buffer.
• len RX byte count.

Returns:

SYN_OK on success.

---

function syn_spi_transfer

Full-duplex simultaneous SPI transmit and receive.

SYN_Status syn_spi_transfer (
    SYN_SPI * spi,
    const uint8_t * tx,
    uint8_t * rx,
    size_t len
) 

Parameters:

• spi Pointer to initialized SPI handle.
• tx TX data buffer (can be NULL, transmits dummy 0xFF).
• rx RX destination buffer (can be NULL).
• len Transfer length in bytes.

Returns:

SYN_OK on success.

---

function syn_spi_write

Write bytes out over SPI (discards incoming RX bytes).

SYN_Status syn_spi_write (
    SYN_SPI * spi,
    const uint8_t * tx,
    size_t len
) 

Parameters:

• spi Pointer to initialized SPI handle.
• tx TX data buffer.
• len TX byte count.

Returns:

SYN_OK on success.

---

---

The documentation for this class was generated from the following file src/syntropic/drivers/syn_spi.c