From 48982a1acfdda93d072507697479d919a1dc566b Mon Sep 17 00:00:00 2001 From: Alan Carvalho de Assis Date: Sat, 26 May 2018 16:18:17 -0600 Subject: [PATCH] configs/xmc4500-relax: Add board support for SPI --- configs/xmc4500-relax/include/board.h | 12 ++ configs/xmc4500-relax/src/Makefile | 4 + configs/xmc4500-relax/src/xmc4_spi.c | 263 ++++++++++++++++++++++++++ 3 files changed, 279 insertions(+) create mode 100644 configs/xmc4500-relax/src/xmc4_spi.c diff --git a/configs/xmc4500-relax/include/board.h b/configs/xmc4500-relax/include/board.h index 0dfd182eb6..b2ff91b7e6 100644 --- a/configs/xmc4500-relax/include/board.h +++ b/configs/xmc4500-relax/include/board.h @@ -325,6 +325,18 @@ #define GPIO_UART0_RXD GPIO_U0C0_DX0B #define GPIO_UART0_TXD (GPIO_U0C0_DOUT0_3 | GPIO_PADA1P_STRONGSOFT | GPIO_OUTPUT_SET) +/* USIC1 CH0 is used as SPI2 + * + * MOSI - P0.5 (UC1C0.DOUT0) + * MISO - P0.4 (UC1C0.DX0A) + * SCLK - P0.11 (UC1C0.SCLKOUT) + */ + +#define BOARD_SPI_DX USIC_DXA +#define GPIO_SPI2_MOSI (GPIO_U1C0_DOUT0_2 | GPIO_PADA2_STRONGMEDIUM) +#define GPIO_SPI2_MISO (GPIO_U1C0_DX0A) +#define GPIO_SPI2_SCLK (GPIO_U1C0_SCLKOUT_1 | GPIO_PADA2_STRONGMEDIUM) + /* USIC1 CH1 is used as UART3 * * RX - P0.0 diff --git a/configs/xmc4500-relax/src/Makefile b/configs/xmc4500-relax/src/Makefile index f7459f807e..9181caf155 100644 --- a/configs/xmc4500-relax/src/Makefile +++ b/configs/xmc4500-relax/src/Makefile @@ -48,6 +48,10 @@ else CSRCS += xmc4_userleds.c endif +ifeq ($(CONFIG_XMC4_USCI_SPI),y) +CSRCS += xmc4_spi.c +endif + ifeq ($(CONFIG_LIB_BOARDCTL),y) CSRCS += xmc4_appinit.c endif diff --git a/configs/xmc4500-relax/src/xmc4_spi.c b/configs/xmc4500-relax/src/xmc4_spi.c new file mode 100644 index 0000000000..37a72b0b11 --- /dev/null +++ b/configs/xmc4500-relax/src/xmc4_spi.c @@ -0,0 +1,263 @@ +/**************************************************************************** + * configs/xmc4500-relax/src/xmc4_spi.c + * + * Copyright (C) 2018 Gregory Nutt. All rights reserved. + * Author: Gregory Nutt + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * 3. Neither the name NuttX nor the names of its contributors may be + * used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE + * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, + * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS + * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED + * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN + * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + * + ****************************************************************************/ + +/**************************************************************************** + * Included Files + ****************************************************************************/ + +#include + +#include +#include +#include + +#include + +#include "xmc4_gpio.h" +#include "xmc4_spi.h" +#include "xmc4500-relax.h" + +/**************************************************************************** + * Public Functions + ****************************************************************************/ + +/**************************************************************************** + * Name: xmc4_spidev_initialize + * + * Description: + * Called to configure SPI chip select GPIO pins for the FRDM-KL25Z board. + * + ****************************************************************************/ + +void weak_function xmc4_spidev_initialize(void) +{ + /* Configure SPI0 chip selects */ + +#ifdef CONFIG_XMC4_SPI0 +#endif + + /* Configure SPI1 chip selects */ + +#ifdef CONFIG_XMC4_SPI1 +#endif + + /* Configure SPI2 chip selects */ + +#ifdef CONFIG_XMC4_SPI2 +#endif + + /* Configure SPI3 chip selects */ + +#ifdef CONFIG_XMC4_SPI3 +#endif +} + +/**************************************************************************** + * Name: xmc4_spi[n]select, xmc4_spi[n]status, and xmc4_spi[n]cmddata + * + * Description: + * These external functions must be provided by board-specific logic. They + * are implementations of the select, status, and cmddata methods of the SPI + * interface defined by struct spi_ops_s (see include/nuttx/spi/spi.h). All + * other methods including xmc4_spibus_initialize()) are provided by common + * Kinetis logic. To use this common SPI logic on your board: + * + * 1. Provide logic in xmc4_boardinitialize() to configure SPI chip select + * pins. + * 2. Provide xmc4_spi[n]select() and xmc4_spi[n]status() functions + * in your board-specific logic. These functions will perform chip + * selection and status operations using GPIOs in the way your board + * is configured. + * 2. If CONFIG_SPI_CMDDATA is defined in the NuttX configuration, provide + * xmc4_spi[n]cmddata() functions in your board-specific logic. These + * functions will perform cmd/data selection operations using GPIOs in + * the way your board is configured. + * 3. Add a call to xmc4_spibus_initialize() in your low level application + * initialization logic + * 4. The handle returned by xmc4_spibus_initialize() may then be used to bind + * the SPI driver to higher level logic (e.g., calling + * mmcsd_spislotinitialize(), for example, will bind the SPI driver to + * the SPI MMC/SD driver). + * + ****************************************************************************/ +/**************************************************************************** + * Name: xmc4_spi[n]select + * + * Description: + * PIO chip select pins may be programmed by the board specific logic in + * one of two different ways. First, the pins may be programmed as SPI + * peripherals. In that case, the pins are completely controlled by the + * SPI driver. This method still needs to be provided, but it may be only + * a stub. + * + * An alternative way to program the PIO chip select pins is as a normal + * GPIO output. In that case, the automatic control of the CS pins is + * bypassed and this function must provide control of the chip select. + * NOTE: In this case, the GPIO output pin does *not* have to be the + * same as the NPCS pin normal associated with the chip select number. + * + * Input Parameters: + * devid - Identifies the (logical) device + * selected - TRUE:Select the device, FALSE:De-select the device + * + * Returned Values: + * None + * + ****************************************************************************/ + +#ifdef CONFIG_XMC4_SPI0 +void xmc4_spi0select(FAR struct spi_dev_s *dev, uint32_t devid, + bool selected) +{ + spiinfo("devid: %d CS: %s\n", + (int)devid, selected ? "assert" : "de-assert"); +} +#endif + +#ifdef CONFIG_XMC4_SPI1 +void xmc4_spi1select(FAR struct spi_dev_s *dev, uint32_t devid, + bool selected) +{ + spiinfo("devid: %d CS: %s\n", + (int)devid, selected ? "assert" : "de-assert"); +} +#endif + +#ifdef CONFIG_XMC4_SPI2 +void xmc4_spi2select(FAR struct spi_dev_s *dev, uint32_t devid, + bool selected) +{ + spiinfo("devid: %d CS: %s\n", + (int)devid, selected ? "assert" : "de-assert"); +} +#endif + +#ifdef CONFIG_XMC4_SPI3 +void xmc4_spi3select(FAR struct spi_dev_s *dev, uint32_t devid, + bool selected) +{ + spiinfo("devid: %d CS: %s\n", + (int)devid, selected ? "assert" : "de-assert"); +} +#endif + +/**************************************************************************** + * Name: xmc4_spi[n]status + * + * Description: + * Return status information associated with the SPI device. + * + * Input Parameters: + * devid - Identifies the (logical) device + * + * Returned Values: + * Bit-encoded SPI status (see include/nuttx/spi/spi.h. + * + ****************************************************************************/ + +#ifdef CONFIG_XMC4_SPI0 +uint8_t xmc4_spi0status(FAR struct spi_dev_s *dev, uint32_t devid) +{ + return 0; +} +#endif + +#ifdef CONFIG_XMC4_SPI1 +uint8_t xmc4_spi1status(FAR struct spi_dev_s *dev, uint32_t devid) +{ + return 0; +} +#endif + +#ifdef CONFIG_XMC4_SPI2 +uint8_t xmc4_spi2status(FAR struct spi_dev_s *dev, uint32_t devid) +{ + return 0; +} +#endif + +#ifdef CONFIG_XMC4_SPI3 +uint8_t xmc4_spi3status(FAR struct spi_dev_s *dev, uint32_t devid) +{ + return 0; +} +#endif + +/**************************************************************************** + * Name: xmc4_spi[n]cmddata + * + * Description: + * Some SPI interfaces, particularly with LCDs, and an auxiliary 9th data + * input that determines where the other 8 data bits represent command or + * data. These interfaces control that CMD/DATA GPIO output + * + * Input Parameters: + * devid - Identifies the (logical) device + * cmd - Determines where command or data should be selected. + * + * Returned Values: + * Bit-encoded SPI status (see include/nuttx/spi/spi.h. + * + ****************************************************************************/ + +#ifdef CONFIG_SPI_CMDDATA +#ifdef CONFIG_XMC4_SPI0 +int xmc4_spi0cmddata(FAR struct spi_dev_s *dev, uint32_t devid, bool cmd) +{ + return 0; +} +#endif + +#ifdef CONFIG_XMC4_SPI1 +int xmc4_spi1cmddata(FAR struct spi_dev_s *dev, uint32_t devid, bool cmd) +{ + return 0; +} +#endif + +#ifdef CONFIG_XMC4_SPI2 +int xmc4_spi2cmddata(FAR struct spi_dev_s *dev, uint32_t devid, bool cmd) +{ + return 0; +} +#endif + +#ifdef CONFIG_XMC4_SPI3 +int xmc4_spi3cmddata(FAR struct spi_dev_s *dev, uint32_t devid, bool cmd) +{ + return 0; +} +#endif +#endif /* CONFIG_SPI_CMDDATA */