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

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.

1 files changed, 67 insertions, 0 deletions

diff --git a/include/libopencm3/stm32/common/spi_common_v1_frf.h b/include/libopencm3/stm32/common/spi_common_v1_frf.h
new file mode 100644
index 00000000..18453a3e
--- /dev/null
+++ b/include/libopencm3/stm32/common/spi_common_v1_frf.h
@@ -0,0 +1,67 @@
+/** @addtogroup spi_defines
+
+@author @htmlonly &copy; @endhtmlonly 2011 Fergus Noble <fergusnoble@gmail.com>
+
+*/
+/*
+ * This file is part of the libopencm3 project.
+ *
+ * Copyright (C) 2011 Fergus Noble <fergusnoble@gmail.com>
+ *
+ * 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/>.
+ */
+
+/* THIS FILE SHOULD NOT BE INCLUDED DIRECTLY, BUT ONLY VIA SPI.H
+The order of header inclusion is important. spi.h includes the device
+specific memorymap.h header before including this header file.*/
+
+/** @cond */
+#ifdef LIBOPENCM3_SPI_H
+/** @endcond */
+#pragma once
+
+/**@{*/
+
+#include <libopencm3/stm32/common/spi_common_v1.h>
+
+/* --- SPI_CR2 values ------------------------------------------------------ */
+
+/* FRF: Frame format */
+/* Note: Not used in I2S mode. */
+#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
+
+/* --- Function prototypes ------------------------------------------------- */
+
+BEGIN_DECLS
+
+void spi_set_frf_ti(uint32_t spi);
+void spi_set_frf_motorola(uint32_t spi);
+
+END_DECLS
+
+/** @cond */
+#else
+#warning "spi_common_v1_frf.h should not be included explicitly, only via spi.h"
+#endif
+/** @endcond */
+/**@}*/
+