Spim#

group bsp_spim: Control the SPIM peripheral.

Author: Alexandre Abadie alexandre.abadie@inria.fr
Copyright: Inria, 2024-present

Defines

DB_SPIM_FREQ_125K#

SPIM frequency register values (must be left shifted by 6)

125 kHz

DB_SPIM_FREQ_250K#: 250 kHz

DB_SPIM_FREQ_500K#: 500 kHz

DB_SPIM_FREQ_1M#: 1 MHz

DB_SPIM_FREQ_2M#: 2 MHz

DB_SPIM_FREQ_4M#: 4 MHz

DB_SPIM_FREQ_8M#: 8 MHz

DB_SPIM_FREQ_16M#: 16 MHz

DB_SPIM_FREQ_32M#: 32 MHz

Enums

enum db_spim_mode_t#

SPIM mode.

Values:

enumerator DB_SPIM_MODE_0#: CPOL = 0 (Active High), CPHA = 0 (Leading)

enumerator DB_SPIM_MODE_1#: CPOL = 0 (Active High), CPHA = 1 (Trailing)

enumerator DB_SPIM_MODE_2#: CPOL = 1 (Active Low), CPHA = 0 (Leading)

enumerator DB_SPIM_MODE_3#: CPOL = 1 (Active Low), CPHA = 1 (Trailing)

Functions

void db_spim_init(const db_spim_conf_t *conf)#

Initialize the SPIM peripheral.

Parameters:

conf – [in] pointer to configuration struct

void db_spim_begin(const gpio_t *cs, db_spim_mode_t mode, uint32_t freq)#

Begin transmission on SPIM.

Parameters:

cs – [in] Pointer to the chip select pin
mode – [in] SPI mode
freq – [in] SPI clock frequency

void db_spim_end(const gpio_t *cs)#

End transmission on SPIM.

Parameters:

cs – [in] Pointer to the chip select pin

void db_spim_send(const void *bytes, size_t len)#

Send bytes over SPI.

Parameters:

bytes – [in] Pointer to the input bytes
len – [in] Length of the bytes to send

void db_spim_receive(const void *bytes, size_t len)#

Receive bytes over SPI.

Parameters:

bytes – [in] Pointer to the output bytes
len – [in] Length of the bytes to receive

struct db_spim_conf_t#

SPIM pin configuration.

Public Members

const gpio_t *mosi#: Master Out Slave In.

const gpio_t *miso#: Master In Slave Out.

const gpio_t *sck#: Clock.