spi.c File Reference

SAM Serial Peripheral Interface Driver.

Copyright (c) 2012-2020 Microchip Technology Inc. and its subsidiaries.

#include "spi.h"

Functions
static void	_spi_clear_tx_complete_flag (struct spi_module *const module)
static enum status_code	_spi_set_config (struct spi_module *const module, const struct spi_config *const config)
enum status_code	spi_init (struct spi_module *const module, Sercom *const hw, const struct spi_config *const config)
	Initializes the SERCOM SPI module. More...
enum status_code	spi_read_buffer_wait (struct spi_module *const module, uint8_t *rx_data, uint16_t length, uint16_t dummy)
	Reads buffer of length SPI characters. More...
void	spi_reset (struct spi_module *const module)
	Resets the SPI module. More...
enum status_code	spi_select_slave (struct spi_module *const module, struct spi_slave_inst *const slave, const bool select)
	Selects slave device. More...
enum status_code	spi_set_baudrate (struct spi_module *const module, uint32_t baudrate)
	Set the baudrate of the SPI module. More...
enum status_code	spi_transceive_buffer_wait (struct spi_module *const module, uint8_t *tx_data, uint8_t *rx_data, uint16_t length)
	Sends and receives a buffer of length SPI characters. More...
enum status_code	spi_transceive_wait (struct spi_module *const module, uint16_t tx_data, uint16_t *rx_data)
	Sends and reads a single SPI character. More...
enum status_code	spi_write_buffer_wait (struct spi_module *const module, const uint8_t *tx_data, uint16_t length)
	Sends a buffer of length SPI characters. More...

static void _spi_clear_tx_complete_flag ( struct spi_module *const  module )

static

Clears the Transmit Complete interrupt flag.

Parameters

[in]

module

Pointer to the software instance struct

References Assert, and SPI_INTERRUPT_FLAG_TX_COMPLETE.

Referenced by spi_read_buffer_wait(), spi_transceive_buffer_wait(), and spi_write_buffer_wait().

static enum status_code _spi_set_config ( struct spi_module *const  module, const struct spi_config *const  config  )

static

Writes an SPI SERCOM configuration to the hardware module.

This function will write out a given configuration to the hardware module. Can only be done when the module is disabled.

Parameters

[in]	module	Pointer to the software instance struct
[in]	config	Pointer to the configuration struct

Returns

The status of the configuration.

Return values

STATUS_ERR_INVALID_ARG	If invalid argument(s) were provided
STATUS_OK	If the configuration was written

References _sercom_get_default_pad(), _sercom_get_sercom_inst_index(), _sercom_get_sync_baud_val(), spi_slave_config::address, spi_slave_config::address_mask, spi_slave_config::address_mode, Assert, spi_master_config::baudrate, spi_config::character_size, spi_config::data_order, system_pinmux_config::direction, spi_slave_config::frame_format, system_pinmux_config::input_pull, spi_config::master, spi_config::mode, spi_config::mode_specific, system_pinmux_config::mux_position, spi_config::mux_setting, PINMUX_DEFAULT, spi_config::pinmux_pad0, spi_config::pinmux_pad1, spi_config::pinmux_pad2, spi_config::pinmux_pad3, PINMUX_UNUSED, spi_slave_config::preload_enable, spi_config::receiver_enable, spi_config::run_in_standby, spi_config::slave, SPI_MODE_MASTER, SPI_MODE_SLAVE, STATUS_ERR_INVALID_ARG, STATUS_OK, system_gclk_chan_get_hz(), system_is_debugger_present(), system_pinmux_get_config_defaults(), SYSTEM_PINMUX_PIN_DIR_INPUT, SYSTEM_PINMUX_PIN_PULL_NONE, system_pinmux_pin_set_config(), and spi_config::transfer_mode.

Referenced by spi_init().