configs/xmc4500-relax: Add board support for SPI
This commit is contained in:
Alan Carvalho de Assis
Gregory Nutt
parent
74148048c2
commit
48982a1acf
@ -325,6 +325,18 @@
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#define GPIO_UART0_RXD GPIO_U0C0_DX0B
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#define GPIO_UART0_TXD (GPIO_U0C0_DOUT0_3 | GPIO_PADA1P_STRONGSOFT | GPIO_OUTPUT_SET)
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/* USIC1 CH0 is used as SPI2
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*
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* MOSI - P0.5 (UC1C0.DOUT0)
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* MISO - P0.4 (UC1C0.DX0A)
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* SCLK - P0.11 (UC1C0.SCLKOUT)
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*/
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#define BOARD_SPI_DX USIC_DXA
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#define GPIO_SPI2_MOSI (GPIO_U1C0_DOUT0_2 | GPIO_PADA2_STRONGMEDIUM)
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#define GPIO_SPI2_MISO (GPIO_U1C0_DX0A)
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#define GPIO_SPI2_SCLK (GPIO_U1C0_SCLKOUT_1 | GPIO_PADA2_STRONGMEDIUM)
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/* USIC1 CH1 is used as UART3
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*
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* RX - P0.0
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@ -48,6 +48,10 @@ else
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CSRCS += xmc4_userleds.c
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endif
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ifeq ($(CONFIG_XMC4_USCI_SPI),y)
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CSRCS += xmc4_spi.c
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endif
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ifeq ($(CONFIG_LIB_BOARDCTL),y)
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CSRCS += xmc4_appinit.c
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endif
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263
configs/xmc4500-relax/src/xmc4_spi.c
Normal file
263
configs/xmc4500-relax/src/xmc4_spi.c
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@ -0,0 +1,263 @@
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/****************************************************************************
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* configs/xmc4500-relax/src/xmc4_spi.c
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*
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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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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name NuttX nor the names of its contributors may be
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* used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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****************************************************************************/
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#include <stdbool.h>
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#include <debug.h>
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#include <errno.h>
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#include <nuttx/spi/spi.h>
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#include "xmc4_gpio.h"
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#include "xmc4_spi.h"
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#include "xmc4500-relax.h"
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: xmc4_spidev_initialize
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*
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* Description:
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* Called to configure SPI chip select GPIO pins for the FRDM-KL25Z board.
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*
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****************************************************************************/
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void weak_function xmc4_spidev_initialize(void)
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{
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/* Configure SPI0 chip selects */
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#ifdef CONFIG_XMC4_SPI0
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#endif
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/* Configure SPI1 chip selects */
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#ifdef CONFIG_XMC4_SPI1
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#endif
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/* Configure SPI2 chip selects */
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#ifdef CONFIG_XMC4_SPI2
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#endif
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/* Configure SPI3 chip selects */
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#ifdef CONFIG_XMC4_SPI3
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#endif
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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
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* are implementations of the select, status, and cmddata methods of the SPI
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* interface defined by struct spi_ops_s (see include/nuttx/spi/spi.h). All
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* other methods including xmc4_spibus_initialize()) are provided by common
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* Kinetis logic. To use this common SPI logic on your board:
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*
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* 1. Provide logic in xmc4_boardinitialize() to configure SPI chip select
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* 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
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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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* 2. 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
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* the way 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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* initialization logic
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* 4. The handle returned by xmc4_spibus_initialize() may then be used to bind
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* 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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* Name: xmc4_spi[n]select
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*
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* Description:
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* PIO chip select pins may be programmed by the board specific logic in
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* one of two different ways. First, the pins may be programmed as SPI
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* peripherals. In that case, the pins are completely controlled by the
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* SPI driver. This method still needs to be provided, but it may be only
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* a stub.
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*
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* An alternative way to program the PIO chip select pins is as a normal
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* GPIO output. In that case, the automatic control of the CS pins is
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* bypassed and this function must provide control of the chip select.
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* NOTE: In this case, the GPIO output pin does *not* have to be the
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* same as the NPCS pin normal associated with the chip select number.
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*
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* Input Parameters:
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* devid - Identifies the (logical) device
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* selected - TRUE:Select the device, FALSE:De-select the device
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*
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* Returned Values:
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* None
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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,
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bool selected)
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{
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spiinfo("devid: %d CS: %s\n",
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(int)devid, selected ? "assert" : "de-assert");
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}
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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,
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bool selected)
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{
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spiinfo("devid: %d CS: %s\n",
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(int)devid, selected ? "assert" : "de-assert");
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}
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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,
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bool selected)
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{
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spiinfo("devid: %d CS: %s\n",
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(int)devid, selected ? "assert" : "de-assert");
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}
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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,
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bool selected)
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{
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spiinfo("devid: %d CS: %s\n",
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(int)devid, selected ? "assert" : "de-assert");
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}
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#endif
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/****************************************************************************
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* Name: xmc4_spi[n]status
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*
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* Description:
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* Return status information associated with the SPI device.
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*
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* Input Parameters:
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* devid - Identifies the (logical) device
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*
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* Returned Values:
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* Bit-encoded SPI status (see include/nuttx/spi/spi.h.
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*
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****************************************************************************/
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#ifdef CONFIG_XMC4_SPI0
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uint8_t xmc4_spi0status(FAR struct spi_dev_s *dev, uint32_t devid)
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{
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return 0;
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}
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#endif
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#ifdef CONFIG_XMC4_SPI1
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uint8_t xmc4_spi1status(FAR struct spi_dev_s *dev, uint32_t devid)
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{
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return 0;
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}
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#endif
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#ifdef CONFIG_XMC4_SPI2
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uint8_t xmc4_spi2status(FAR struct spi_dev_s *dev, uint32_t devid)
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{
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return 0;
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}
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#endif
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#ifdef CONFIG_XMC4_SPI3
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uint8_t xmc4_spi3status(FAR struct spi_dev_s *dev, uint32_t devid)
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{
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return 0;
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}
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#endif
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/****************************************************************************
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* Name: xmc4_spi[n]cmddata
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*
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* Description:
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* Some SPI interfaces, particularly with LCDs, and an auxiliary 9th data
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* input that determines where the other 8 data bits represent command or
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* data. These interfaces control that CMD/DATA GPIO output
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*
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* Input Parameters:
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* devid - Identifies the (logical) device
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* cmd - Determines where command or data should be selected.
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*
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* Returned Values:
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* Bit-encoded SPI status (see include/nuttx/spi/spi.h.
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*
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****************************************************************************/
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#ifdef CONFIG_SPI_CMDDATA
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#ifdef CONFIG_XMC4_SPI0
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int xmc4_spi0cmddata(FAR struct spi_dev_s *dev, uint32_t devid, bool cmd)
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{
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return 0;
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}
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#endif
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#ifdef CONFIG_XMC4_SPI1
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int xmc4_spi1cmddata(FAR struct spi_dev_s *dev, uint32_t devid, bool cmd)
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{
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return 0;
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}
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#endif
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#ifdef CONFIG_XMC4_SPI2
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int xmc4_spi2cmddata(FAR struct spi_dev_s *dev, uint32_t devid, bool cmd)
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{
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return 0;
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}
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#endif
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#ifdef CONFIG_XMC4_SPI3
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int xmc4_spi3cmddata(FAR struct spi_dev_s *dev, uint32_t devid, bool cmd)
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{
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return 0;
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}
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#endif
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#endif /* CONFIG_SPI_CMDDATA */
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