arch/arm/src/xmc4: Add SPI support for Infineon XMC45xx microcontroller
This commit is contained in:
Alan Carvalho de Assis
Gregory Nutt
parent
5d2c226675
commit
3b74f80981
@ -139,3 +139,7 @@ endif
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ifeq ($(CONFIG_I2C),y)
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CHIP_CSRCS += xmc4_i2c.c
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endif
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ifeq ($(CONFIG_XMC4_USCI_SPI),y)
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CHIP_CSRCS += xmc4_spi.c
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endif
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2121
arch/arm/src/xmc4/xmc4_spi.c
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2121
arch/arm/src/xmc4/xmc4_spi.c
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File diff suppressed because it is too large
Load Diff
@ -1,7 +1,7 @@
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/****************************************************************************
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* arch/arm/src/xmc4/xmc4_spi.h
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*
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* Copyright (C) 2017 Gregory Nutt. All rights reserved.
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* Copyright (C) 2018 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <gnutt@nuttx.org>
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*
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* Redistribution and use in source and binary forms, with or without
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@ -42,11 +42,16 @@
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#include <nuttx/config.h>
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#include "chip/xmc4_spi.h"
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#include "chip/xmc4_usic.h"
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/************************************************************************************
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/****************************************************************************
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* Pre-processor Definitions
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************************************************************************************/
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****************************************************************************/
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#define XMC4_SPI_MODE0 USIC_BRG_SCLKCFG_NOINVDLY
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#define XMC4_SPI_MODE1 USIC_BRG_SCLKCFG_NOINVNODLY
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#define XMC4_SPI_MODE2 USIC_BRG_SCLKCFG_INVDLY
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#define XMC4_SPI_MODE3 USIC_BRG_SCLKCFG_INVNODLY
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#ifndef __ASSEMBLY__
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@ -59,59 +64,61 @@ extern "C"
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#define EXTERN extern
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#endif
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/************************************************************************************
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/****************************************************************************
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* Public Data
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************************************************************************************/
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****************************************************************************/
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struct spi_dev_s;
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enum usic_channel_e;
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/****************************************************************************
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* Public Function Prototypes
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****************************************************************************/
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/************************************************************************************
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/****************************************************************************
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* Name: xmc4_spibus_initialize
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*
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* Description:
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* Initialize the selected SPI bus
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*
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* Input Parameters:
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* bus number (for hardware that has mutiple SPI interfaces)
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* Input Parameter:
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* channel number (for hardware that has multiple SPI interfaces)
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*
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* Returned Value:
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* Valid SPI device structure reference on succcess; a NULL on failure
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* Valid SPI device structure reference on success; a NULL on failure
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*
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************************************************************************************/
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****************************************************************************/
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FAR struct spi_dev_s *xmc4_spibus_initialize(int bus);
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FAR struct spi_dev_s *xmc4_spibus_initialize(int channel);
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/************************************************************************************
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/****************************************************************************
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* Name: xmc4_spi[n]select, xmc4_spi[n]status, and xmc4_spi[n]cmddata
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*
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* Description:
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* These external functions must be provided by board-specific logic. They are
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* implementations of the select, status, and cmddata methods of the SPI interface
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* defined by struct spi_ops_s (see include/nuttx/spi/spi.h). All other methods
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* including xmc4_spibus_initialize()) are provided by common Kinetis logic. To use
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* this common SPI logic on your board:
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* These external functions must be provided by board-specific logic.
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* They are implementations of the select, status, and cmddata methods of
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* SPI interface defined by struct spi_ops_s (see include/nuttx/spi/spi.h).
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* All other methods including xmc4_spibus_initialize()) are provided by
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* common XMC4 logic. To use this common SPI logic on your board:
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*
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* 1. Provide logic in xmc4_board_initialize() to configure SPI chip select
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* pins.
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* 1. Provide logic in xmc4_board_initialize() to configure SPI chip
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* select pins.
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* 2. Provide xmc4_spi[n]select() and xmc4_spi[n]status() functions
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* in your board-specific logic. These functions will perform chip selection
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* and status operations using GPIOs in the way your board is configured.
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* 2. If CONFIG_SPI_CMDDATA is defined in the NuttX configuration, provide
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* in your board-specific logic. These functions w/ perform chip
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* selection and status operations using GPIOs in the way your board
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* is configured.
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* 3. If CONFIG_SPI_CMDDATA is defined in the NuttX configuration, provide
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* xmc4_spi[n]cmddata() functions in your board-specific logic. These
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* functions will perform cmd/data selection operations using GPIOs in the way
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* your board is configured.
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* 3. Add a call to xmc4_spibus_initialize() in your low level application
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* functions will perform cmd/data selection operations using GPIOs in
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* the way your board is configured.
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* 4. Add a call to xmc4_spibus_initialize() in your low level application
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* initialization logic
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* 4. The handle returned by xmc4_spibus_initialize() may then be used to bind the
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* SPI driver to higher level logic (e.g., calling
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* 5. The handle returned by xmc4_spibus_initialize() may then be used to
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* bind the SPI driver to higher level logic (e.g., calling
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* mmcsd_spislotinitialize(), for example, will bind the SPI driver to
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* the SPI MMC/SD driver).
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*
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************************************************************************************/
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****************************************************************************/
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#ifdef CONFIG_XMC4_SPI0
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void xmc4_spi0select(FAR struct spi_dev_s *dev, uint32_t devid, bool selected);
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@ -120,6 +127,7 @@ uint8_t xmc4_spi0status(FAR struct spi_dev_s *dev, uint32_t devid);
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int xmc4_spi0cmddata(FAR struct spi_dev_s *dev, uint32_t devid, bool cmd);
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#endif
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#endif
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#ifdef CONFIG_XMC4_SPI1
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void xmc4_spi1select(FAR struct spi_dev_s *dev, uint32_t devid, bool selected);
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uint8_t xmc4_spi1status(FAR struct spi_dev_s *dev, uint32_t devid);
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@ -127,6 +135,7 @@ uint8_t xmc4_spi1status(FAR struct spi_dev_s *dev, uint32_t devid);
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int xmc4_spi1cmddata(FAR struct spi_dev_s *dev, uint32_t devid, bool cmd);
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#endif
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#endif
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#ifdef CONFIG_XMC4_SPI2
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void xmc4_spi2select(FAR struct spi_dev_s *dev, uint32_t devid, bool selected);
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uint8_t xmc4_spi2status(FAR struct spi_dev_s *dev, uint32_t devid);
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@ -135,11 +144,35 @@ int xmc4_spi2cmddata(FAR struct spi_dev_s *dev, uint32_t devid, bool cmd);
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#endif
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#endif
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#ifdef CONFIG_XMC4_SPI3
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void xmc4_spi3select(FAR struct spi_dev_s *dev, uint32_t devid, bool selected);
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uint8_t xmc4_spi3status(FAR struct spi_dev_s *dev, uint32_t devid);
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#ifdef CONFIG_SPI_CMDDATA
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int xmc4_spi3cmddata(FAR struct spi_dev_s *dev, uint32_t devid, bool cmd);
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#endif
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#endif
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#ifdef CONFIG_XMC4_SPI4
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void xmc4_spi4select(FAR struct spi_dev_s *dev, uint32_t devid, bool selected);
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uint8_t xmc4_spi4status(FAR struct spi_dev_s *dev, uint32_t devid);
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#ifdef CONFIG_SPI_CMDDATA
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int xmc4_spi4cmddata(FAR struct spi_dev_s *dev, uint32_t devid, bool cmd);
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#endif
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#endif
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#ifdef CONFIG_XMC4_SPI5
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void xmc4_spi5select(FAR struct spi_dev_s *dev, uint32_t devid, bool selected);
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uint8_t xmc4_spi5status(FAR struct spi_dev_s *dev, uint32_t devid);
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#ifdef CONFIG_SPI_CMDDATA
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int xmc4_spi5cmddata(FAR struct spi_dev_s *dev, uint32_t devid, bool cmd);
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#endif
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#endif
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/****************************************************************************
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* Name: ssp_flush
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* Name: spi_flush
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*
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* Description:
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* Flush and discard any words left in the RX fifo. This can be called
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* Flush and discard any words left in the RX FIFO. This can be called
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* from spi[n]select after a device is deselected (if you worry about such
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* things).
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*
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@ -155,10 +188,6 @@ int xmc4_spi2cmddata(FAR struct spi_dev_s *dev, uint32_t devid, bool cmd);
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#if defined(__cplusplus)
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}
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#endif
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#if defined(CONFIG_XMC4_SPI0) || defined(CONFIG_XMC4_SPI1) || defined(CONFIG_XMC4_SPI2)
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struct spi_dev_s;
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void spi_flush(FAR struct spi_dev_s *dev);
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#endif
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#endif /* __ASSEMBLY__ */
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#endif /* __ARCH_ARM_SRC_XMC4_XMC4_SPI_H */
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