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Function rc_spi_transfer

Function Documentation

int rc_spi_transfer(int bus, int slave, uint8_t *tx_data, size_t tx_bytes, uint8_t *rx_data)

Send any sequence of bytes and read the response.

This is a wrapper for the ioctl spi transfer function and is generally what you will use for reading/writing device registers.

Parameters

  • bus – [in] SPI bus to use

  • slave – [in] slave id

  • tx_data – [in] pointer to data to send

  • tx_bytes – [in] number of bytes to send

  • rx_data – pointer to put response data

Returns

number of bytes received or -1 on failure