EMTime/libopencm3
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

stm32: rework spi, based on PR #740 and #742.

Browse Source 
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.
This commit is contained in:
Guillaume Revaillot
2018-04-04 16:27:59 +02:00
committed by Karl Palsson
parent 0deb58c73c
commit bf125e91f9
24 changed files with 205 additions and 83 deletions
Download Patch File Download Diff File Expand all files Collapse all files

67
lib/stm32/common/spi_common_v1_frf.c Normal file
View File

@@ -0,0 +1,67 @@
/** @addtogroup spi_file
@author @htmlonly © @endhtmlonly 2009
Uwe Hermann <uwe@hermann-uwe.de>
@author @htmlonly &copy; @endhtmlonly 2012
Ken Sarkies <ksarkies@internode.on.net>
@author @htmlonly &copy; @endhtmlonly 2018
Guillaume Revaillot <revaillot@archos.com>
*/
/*
* This file is part of the libopencm3 project.
*
* Copyright (C) 2009 Uwe Hermann <uwe@hermann-uwe.de>
*
* This library is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this library. If not, see <http://www.gnu.org/licenses/>.
*/
#include <libopencm3/stm32/spi.h>
/**@{*/
/*---------------------------------------------------------------------------*/
/** @brief SPI Set Frame Format to TI
@param[in] spi Unsigned int32. SPI peripheral identifier @ref spi_reg_base.
*/
void spi_set_frf_ti(uint32_t spi)
{
SPI_CR2(spi) |= SPI_CR2_FRF;
}
/*---------------------------------------------------------------------------*/
/** @brief SPI Set Frame Format to Motorola
@param[in] spi Unsigned int32. SPI peripheral identifier @ref spi_reg_base.
*/
void spi_set_frf_motorola(uint32_t spi)
{
SPI_CR2(spi) &= ~SPI_CR2_FRF;
}
#define SPI_CR2_FRF (1 << 4)
#define SPI_CR2_FRF_MOTOROLA_MODE (0 << 4)
#define SPI_CR2_FRF_TI_MODE (1 << 4)
/* --- SPI_SR values ------------------------------------------------------- */
/* FRE / TIFRFE: TI frame format error */
#define SPI_SR_TIFRFE (1 << 8) //F2
#define SPI_SR_FRE (1 << 8) //others
/**@}*/