elpekenin/spi_custom.h

Some patching on QMK’s spi_master.h driver, to allow using multiple buses.

Caution

The following must be set up:

• SPI_DRIVERS

• SPI_SCK_PINS

• SPI_MOSI_PINS

• SPI_MISO_PINS

They will be automatically configured with their single-driver counterparts, if available.

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enum spi_status_t

enumerator SPI_STATUS_SUCCESS = 0

enumerator SPI_STATUS_ERROR = -1

enumerator SPI_STATUS_TIMEOUT = -2

void spi_custom_init(uint8_t n)

Initialize the n’th driver.

bool spi_custom_start(pin_t slavePin, bool lsbFirst, uint8_t mode, uint16_t divisor, uint8_t n)

Set up the n’th driver for a transmission.

Parameters:

• slavePin – The chip select pin for the target device.

• lsbFirst – Whether Least Significant Bit is sent first or last.

• mode – SPI clocks’ mode (0-3).

• divisor – Control the clock’s speed.

• n – Index of the driver to be used.

Returns:

Whether operation was successful.

spi_status_t spi_custom_write(uint8_t data, uint8_t n)

Send a single byte (data) over the n’th driver.

spi_status_t spi_custom_read(uint8_t n)

Read a single byte (return) over the n’th driver.

spi_status_t spi_custom_transmit(const uint8_t *data, uint16_t length, uint8_t n)

Send length bytes from data over the n’th driver.

spi_status_t spi_custom_receive(uint8_t *data, uint16_t length, uint8_t n)

Read length bytes into data over the n’th driver.

void spi_custom_stop(uint8_t n)

Undo the settings performced by spi_custom_start()