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202 lines
5.5 KiB
C
202 lines
5.5 KiB
C
/**
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* \file
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*
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* \brief I/O SPI related functionality implementation.
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*
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* Copyright (c) 2014-2018 Microchip Technology Inc. and its subsidiaries.
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*
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* \asf_license_start
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*
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* \page License
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*
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* Subject to your compliance with these terms, you may use Microchip
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* software and any derivatives exclusively with Microchip products.
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* It is your responsibility to comply with third party license terms applicable
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* to your use of third party software (including open source software) that
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* may accompany Microchip software.
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*
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* THIS SOFTWARE IS SUPPLIED BY MICROCHIP "AS IS". NO WARRANTIES,
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* WHETHER EXPRESS, IMPLIED OR STATUTORY, APPLY TO THIS SOFTWARE,
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* INCLUDING ANY IMPLIED WARRANTIES OF NON-INFRINGEMENT, MERCHANTABILITY,
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* AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT WILL MICROCHIP BE
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* LIABLE FOR ANY INDIRECT, SPECIAL, PUNITIVE, INCIDENTAL OR CONSEQUENTIAL
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* LOSS, DAMAGE, COST OR EXPENSE OF ANY KIND WHATSOEVER RELATED TO THE
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* SOFTWARE, HOWEVER CAUSED, EVEN IF MICROCHIP HAS BEEN ADVISED OF THE
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* POSSIBILITY OR THE DAMAGES ARE FORESEEABLE. TO THE FULLEST EXTENT
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* ALLOWED BY LAW, MICROCHIP'S TOTAL LIABILITY ON ALL CLAIMS IN ANY WAY
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* RELATED TO THIS SOFTWARE WILL NOT EXCEED THE AMOUNT OF FEES, IF ANY,
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* THAT YOU HAVE PAID DIRECTLY TO MICROCHIP FOR THIS SOFTWARE.
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*
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* \asf_license_stop
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*
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*/
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#include "hal_spi_m_sync.h"
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#include <utils_assert.h>
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#include <utils.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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/**
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* \brief Driver version
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*/
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#define SPI_M_SYNC_DRIVER_VERSION 0x00000001u
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#define SPI_DEACTIVATE_NEXT 0x8000
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static int32_t _spi_m_sync_io_write(struct io_descriptor *const io, const uint8_t *const buf, const uint16_t length);
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static int32_t _spi_m_sync_io_read(struct io_descriptor *const io, uint8_t *const buf, const uint16_t length);
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/**
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* \brief Initialize the SPI HAL instance function pointer for HPL APIs.
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*/
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void spi_m_sync_set_func_ptr(struct spi_m_sync_descriptor *spi, void *const func)
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{
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ASSERT(spi);
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spi->func = (struct _spi_m_sync_hpl_interface *)func;
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}
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int32_t spi_m_sync_init(struct spi_m_sync_descriptor *spi, void *const hw)
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{
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int32_t rc = 0;
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ASSERT(spi && hw);
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spi->dev.prvt = (void *)hw;
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rc = _spi_m_sync_init(&spi->dev, hw);
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if (rc < 0) {
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return rc;
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}
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spi->flags = SPI_DEACTIVATE_NEXT;
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spi->io.read = _spi_m_sync_io_read;
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spi->io.write = _spi_m_sync_io_write;
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return ERR_NONE;
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}
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void spi_m_sync_deinit(struct spi_m_sync_descriptor *spi)
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{
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ASSERT(spi);
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_spi_m_sync_deinit(&spi->dev);
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}
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void spi_m_sync_enable(struct spi_m_sync_descriptor *spi)
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{
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ASSERT(spi);
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_spi_m_sync_enable(&spi->dev);
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}
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void spi_m_sync_disable(struct spi_m_sync_descriptor *spi)
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{
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ASSERT(spi);
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_spi_m_sync_disable(&spi->dev);
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}
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int32_t spi_m_sync_set_baudrate(struct spi_m_sync_descriptor *spi, const uint32_t baud_val)
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{
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ASSERT(spi);
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return _spi_m_sync_set_baudrate(&spi->dev, baud_val);
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}
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int32_t spi_m_sync_set_mode(struct spi_m_sync_descriptor *spi, const enum spi_transfer_mode mode)
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{
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ASSERT(spi);
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return _spi_m_sync_set_mode(&spi->dev, mode);
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}
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int32_t spi_m_sync_set_char_size(struct spi_m_sync_descriptor *spi, const enum spi_char_size char_size)
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{
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ASSERT(spi);
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return _spi_m_sync_set_char_size(&spi->dev, char_size);
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}
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int32_t spi_m_sync_set_data_order(struct spi_m_sync_descriptor *spi, const enum spi_data_order dord)
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{
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ASSERT(spi);
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return _spi_m_sync_set_data_order(&spi->dev, dord);
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}
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/** \brief Do SPI read in polling way
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* For SPI master, activate CS, do send 0xFFs and read data, deactivate CS.
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*
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* It blocks until all data read or error.
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*
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* \param[in, out] spi Pointer to the HAL SPI instance.
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* \param[out] buf Pointer to the buffer to store read data.
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* \param[in] size Size of the data in number of characters.
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* \return Operation status.
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* \retval size Success.
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* \retval >=0 Time out, with number of characters read.
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*/
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static int32_t _spi_m_sync_io_read(struct io_descriptor *io, uint8_t *buf, const uint16_t length)
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{
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ASSERT(io);
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struct spi_m_sync_descriptor *spi = CONTAINER_OF(io, struct spi_m_sync_descriptor, io);
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struct spi_xfer xfer;
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xfer.rxbuf = buf;
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xfer.txbuf = 0;
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xfer.size = length;
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return spi_m_sync_transfer(spi, &xfer);
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}
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/** \brief Do SPI data write in polling way
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* For SPI master, activate CS, do buffer send and deactivate CS. The data back
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* is discarded.
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*
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* The data read back is discarded.
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*
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* It blocks until all data sent or error.
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*
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* \param[in, out] spi Pointer to the HAL SPI instance.
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* \param[in] p_xfer Pointer to the transfer information (\ref spi_transfer).
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* \return Operation status.
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* \retval size Success.
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* \retval >=0 Timeout, with number of characters transferred.
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*/
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static int32_t _spi_m_sync_io_write(struct io_descriptor *const io, const uint8_t *const buf, const uint16_t length)
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{
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ASSERT(io);
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struct spi_m_sync_descriptor *spi = CONTAINER_OF(io, struct spi_m_sync_descriptor, io);
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struct spi_xfer xfer;
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xfer.rxbuf = 0;
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xfer.txbuf = (uint8_t *)buf;
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xfer.size = length;
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return spi_m_sync_transfer(spi, &xfer);
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}
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int32_t spi_m_sync_transfer(struct spi_m_sync_descriptor *spi, const struct spi_xfer *p_xfer)
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{
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struct spi_msg msg;
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ASSERT(spi && p_xfer);
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msg.txbuf = p_xfer->txbuf;
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msg.rxbuf = p_xfer->rxbuf;
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msg.size = p_xfer->size;
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return _spi_m_sync_trans(&spi->dev, &msg);
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}
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int32_t spi_m_sync_get_io_descriptor(struct spi_m_sync_descriptor *const spi, struct io_descriptor **io)
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{
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ASSERT(spi && io);
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*io = &spi->io;
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return 0;
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}
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uint32_t spi_m_sync_get_version(void)
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{
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return SPI_M_SYNC_DRIVER_VERSION;
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}
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#ifdef __cplusplus
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}
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#endif
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