Update AVR XMEGA SPI low level driver.
git-svn-id: svn://svn.code.sf.net/p/chibios/svn/trunk@14696 27425a3e-05d8-49a3-a47f-9c15f0e5edd8
This commit is contained in:
Theodore Ateba
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/*
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ChibiOS - Copyright (C) 2006..2018 Giovanni Di Sirio
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ChibiOS - Copyright (C) 2015..2021 Theodore Ateba
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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@ -370,6 +370,20 @@ void spi_lld_exchange(SPIDriver *spip, size_t n, const void *txbuf, void *rxbuf)
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spip->spi->DATA = (spip->txbuf ? spip->txbuf[0] : DUMMY_SPI_SEND_VALUE);
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}
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#if (SPI_SUPPORTS_CIRCULAR == TRUE) || defined(__DOXYGEN__)
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/**
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* @brief Aborts the ongoing SPI operation, if any.
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*
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* @param[in] spip pointer to the @p SPIDriver object
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*
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* @notapi
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*/
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void spi_lld_abort(SPIDriver *spip) {
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/* Stopping SPI.*/
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}
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#endif /* SPI_SUPPORTS_CIRCULAR == TRUE */
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/**
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* @brief Exchanges one frame using a polled wait.
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@ -1,5 +1,5 @@
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/*
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ChibiOS - Copyright (C) 2016..2018 Theodore Ateba
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ChibiOS - Copyright (C) 2016..2021 Theodore Ateba
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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@ -125,107 +125,34 @@
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/* Driver data structures and types. */
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/*==========================================================================*/
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/**
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* @brief Type of a structure representing an SPI driver.
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*/
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typedef struct SPIDriver SPIDriver;
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/**
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* @brief SPI notification callback type.
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*
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* @param[in] spip pointer to the @p SPIDriver object triggering the
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* callback
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*/
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typedef void (*spicallback_t)(SPIDriver *spip);
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/**
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* @brief Driver configuration structure.
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* @note Implementations may extend this structure to contain more,
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* architecture dependent, fields.
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*/
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typedef struct {
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/**
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* @brief Operation complete callback.
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*/
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spicallback_t end_cb;
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/* End of the mandatory fields. */
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/**
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* @brief Port used of Slave Select
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*/
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ioportid_t ssport;
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/**
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* @brief Pad used of Slave Select
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*/
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uint8_t sspad;
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/**
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* @brief SPI Control Register initialization data.
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*/
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//uint8_t spcr;
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SPI_PRESCALER_t prescaler; // Clock divider
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SPI_MODE_t mode; // SPI mode 1, 2, ...
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bool master; // Master or slave
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bool dord; // Data order, LSB or MSB first
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bool clk2x; // SPI double speed mode.
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SPI_INTLVL_t irqlevel; // SPI interrupt service level
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} SPIConfig;
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/**
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* @brief Structure representing an SPI driver.
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* @note Implementations may extend this structure to contain more,
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* architecture dependent, fields.
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*/
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struct SPIDriver {
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/**
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* @brief Driver state.
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*/
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spistate_t state;
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/**
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* @brief Current configuration data.
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*/
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const SPIConfig *config;
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#if SPI_USE_WAIT || defined(__DOXYGEN__)
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/**
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* @brief Waiting thread.
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*/
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thread_reference_t thread;
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#endif /* SPI_USE_WAIT */
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#if SPI_USE_MUTUAL_EXCLUSION || defined(__DOXYGEN__)
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/**
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* @brief Mutex protecting the bus.
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*/
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mutex_t mutex;
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#endif /* SPI_USE_MUTUAL_EXCLUSION */
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#if defined(SPI_DRIVER_EXT_FIELDS)
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SPI_DRIVER_EXT_FIELDS
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#endif
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/* End of the mandatory fields. */
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/**
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* @brief Pointer to the SPI register module.
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*/
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SPI_t *spi;
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/**
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* @brief Pointer to the buffer with data to send.
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*/
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const uint8_t *txbuf;
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/**
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* @brief Pointer to the buffer to store received data.
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*/
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uint8_t *rxbuf;
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/**
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* @brief Number of bytes of data to exchange.
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*/
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size_t exbytes;
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/**
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* @brief Current index in buffer when exchanging data.
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*/
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size_t exidx;
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};
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/*==========================================================================*/
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/* Driver macros. */
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/*==========================================================================*/
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/**
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* @brief Circular mode support flag.
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*/
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#define SPI_SUPPORTS_CIRCULAR TRUE
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#define spi_lld_driver_fields \
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SPI_t *spi; \
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const uint8_t *txbuf; \
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uint8_t *rxbuf; \
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size_t exbytes; \
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size_t exidx;
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/**
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* @brief Low level fields of the SPI configuration structure.
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*/
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#define spi_lld_config_fields \
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SPI_PRESCALER_t prescaler; \
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SPI_MODE_t mode; \
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bool master; \
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bool dord; \
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bool clk2x; \
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SPI_INTLVL_t irqlevel;
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/**
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* @brief Ignores data on the SPI bus.
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* @details This asynchronous function starts the transmission of a series of
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@ -292,6 +219,10 @@ extern "C" {
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void spi_lld_exchange(SPIDriver *spip, size_t n,
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const void *txbuf, void *rxbuf);
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#if (SPI_SUPPORTS_CIRCULAR == TRUE) || defined(__DOXYGEN__)
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void spi_lld_abort(SPIDriver *spip);
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#endif
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//#if AVR_SPI_USE_16BIT_POLLED_EXCHANGE
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// uint16_t spi_lld_polled_exchange(SPIDriver *spip, uint16_t frame);
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//#else
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