bf125e91f9
split spi stuff in three part: - v1 : basic spi peripheral - v1_frf : v1 spi with frf mode additional bit in spi_cr2 / spi_sr - v2 : spi with variable datasize, fifo and other fancy stuff. v1 maps to f1 chips v1_frf to f2, f4 and l0,l1 v2 to f0, f3 and l4 This breaks spi_master_init API for v2 devices : function prototype from common spi header used to be abused, with DFF bit reused for CRCL bit. New v2 spi_master_init does not handle anymore CRCL bits, as it does not usually mess with other crc configuration.
68 lines
1.9 KiB
C
68 lines
1.9 KiB
C
/** @addtogroup spi_file
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@author @htmlonly © @endhtmlonly 2009
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Uwe Hermann <uwe@hermann-uwe.de>
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@author @htmlonly © @endhtmlonly 2012
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Ken Sarkies <ksarkies@internode.on.net>
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@author @htmlonly © @endhtmlonly 2018
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Guillaume Revaillot <revaillot@archos.com>
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*/
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/*
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* This file is part of the libopencm3 project.
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*
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* Copyright (C) 2009 Uwe Hermann <uwe@hermann-uwe.de>
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*
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* This library is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Lesser General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with this library. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <libopencm3/stm32/spi.h>
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/**@{*/
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/*---------------------------------------------------------------------------*/
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/** @brief SPI Set Frame Format to TI
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@param[in] spi Unsigned int32. SPI peripheral identifier @ref spi_reg_base.
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*/
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void spi_set_frf_ti(uint32_t spi)
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{
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SPI_CR2(spi) |= SPI_CR2_FRF;
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}
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/*---------------------------------------------------------------------------*/
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/** @brief SPI Set Frame Format to Motorola
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@param[in] spi Unsigned int32. SPI peripheral identifier @ref spi_reg_base.
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*/
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void spi_set_frf_motorola(uint32_t spi)
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{
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SPI_CR2(spi) &= ~SPI_CR2_FRF;
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}
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#define SPI_CR2_FRF (1 << 4)
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#define SPI_CR2_FRF_MOTOROLA_MODE (0 << 4)
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#define SPI_CR2_FRF_TI_MODE (1 << 4)
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/* --- SPI_SR values ------------------------------------------------------- */
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/* FRE / TIFRFE: TI frame format error */
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#define SPI_SR_TIFRFE (1 << 8) //F2
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#define SPI_SR_FRE (1 << 8) //others
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/**@}*/
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