334 lines
9.7 KiB
C
334 lines
9.7 KiB
C
/****************************************************************************
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* boards/arm/stm32/stm32f4discovery/src/stm32_spi.c
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership. The
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* ASF licenses this file to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance with the
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* License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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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 <stdint.h>
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#include <stdbool.h>
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#include <errno.h>
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#include <debug.h>
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#include <nuttx/spi/spi.h>
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#include <arch/board/board.h>
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#include "arm_internal.h"
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#include "chip.h"
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#include "stm32.h"
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#include "stm32f4discovery.h"
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#if defined(CONFIG_STM32_SPI1) || defined(CONFIG_STM32_SPI2) || defined(CONFIG_STM32_SPI3)
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: stm32_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 stm32f4discovery
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* board.
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*
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****************************************************************************/
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void weak_function stm32_spidev_initialize(void)
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{
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#ifdef CONFIG_ENC28J60
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stm32_configgpio(GPIO_ENC28J60_CS);
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stm32_configgpio(GPIO_ENC28J60_RESET);
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stm32_configgpio(GPIO_ENC28J60_INTR);
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#endif
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#ifdef CONFIG_STM32_SPI1
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stm32_configgpio(GPIO_CS_MEMS); /* MEMS chip select */
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#endif
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#if defined(CONFIG_STM32_SPI2) && defined(CONFIG_SENSORS_MAX31855)
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stm32_configgpio(GPIO_MAX31855_CS); /* MAX31855 chip select */
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#endif
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#if defined(CONFIG_LCD_MAX7219) || defined(CONFIG_LEDS_MAX7219)
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stm32_configgpio(GPIO_MAX7219_CS); /* MAX7219 chip select */
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#endif
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#ifdef CONFIG_LPWAN_SX127X
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stm32_configgpio(GPIO_SX127X_CS); /* SX127x chip select */
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#endif
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#if defined(CONFIG_LCD_ST7567) || defined(CONFIG_LCD_ST7567)
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stm32_configgpio(STM32_LCD_CS); /* ST7567/ST7789 chip select */
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#endif
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#if defined(CONFIG_STM32_SPI2) && defined(CONFIG_SENSORS_MAX6675)
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stm32_configgpio(GPIO_MAX6675_CS); /* MAX6675 chip select */
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#endif
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#if defined(CONFIG_LCD_UG2864AMBAG01) || defined(CONFIG_LCD_UG2864HSWEG01) || \
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defined(CONFIG_LCD_SSD1351)
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stm32_configgpio(GPIO_OLED_CS); /* OLED chip select */
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# if defined(CONFIG_LCD_UG2864AMBAG01)
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stm32_configgpio(GPIO_OLED_A0); /* OLED Command/Data */
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# endif
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# if defined(CONFIG_LCD_UG2864HSWEG01) || defined(CONFIG_LCD_SSD1351)
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stm32_configgpio(GPIO_OLED_DC); /* OLED Command/Data */
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# endif
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#endif
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}
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/****************************************************************************
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* Name: stm32_spi1/2/3select and stm32_spi1/2/3status
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*
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* Description:
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* The external functions, stm32_spi1/2/3select and stm32_spi1/2/3status
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* must be provided by board-specific logic. They are implementations of
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* the select and status methods of the SPI interface defined by struct
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* spi_ops_s (see include/nuttx/spi/spi.h). All other methods (including
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* stm32_spibus_initialize()) are provided by common STM32 logic. To use
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* this common SPI logic on your board:
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*
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* 1. Provide logic in stm32_boardinitialize() to configure SPI chip select
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* pins.
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* 2. Provide stm32_spi1/2/3select() and stm32_spi1/2/3status() 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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* 3. Add a calls to stm32_spibus_initialize() in your low level
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* application initialization logic
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* 4. The handle returned by stm32_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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#ifdef CONFIG_STM32_SPI1
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void stm32_spi1select(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", (int)devid, selected ? "assert" :
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"de-assert");
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#ifdef CONFIG_ENC28J60
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if (devid == SPIDEV_ETHERNET(0))
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{
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/* Set the GPIO low to select and high to de-select */
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stm32_gpiowrite(GPIO_ENC28J60_CS, !selected);
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}
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#endif
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#ifdef CONFIG_LPWAN_SX127X
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if (devid == SPIDEV_LPWAN(0))
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{
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stm32_gpiowrite(GPIO_SX127X_CS, !selected);
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}
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#endif
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#if defined(CONFIG_LCD_ST7567) || defined(CONFIG_LCD_ST7789)
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if (devid == SPIDEV_DISPLAY(0))
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{
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stm32_gpiowrite(STM32_LCD_CS, !selected);
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}
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#endif
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#if defined(CONFIG_LCD_MAX7219) || defined(CONFIG_LEDS_MAX7219)
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if (devid == SPIDEV_DISPLAY(0))
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{
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stm32_gpiowrite(GPIO_MAX7219_CS, !selected);
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}
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#endif
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#if defined(CONFIG_LCD_UG2864AMBAG01) || defined(CONFIG_LCD_UG2864HSWEG01) || \
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defined(CONFIG_LCD_SSD1351)
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if (devid == SPIDEV_DISPLAY(0))
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{
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stm32_gpiowrite(GPIO_OLED_CS, !selected);
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}
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else
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#endif
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{
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stm32_gpiowrite(GPIO_CS_MEMS, !selected);
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}
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}
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uint8_t stm32_spi1status(struct spi_dev_s *dev, uint32_t devid)
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{
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uint8_t status = 0;
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#ifdef CONFIG_LPWAN_SX127X
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if (devid == SPIDEV_LPWAN(0))
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{
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status |= SPI_STATUS_PRESENT;
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}
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#endif
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return status;
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}
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#endif
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#ifdef CONFIG_STM32_SPI2
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void stm32_spi2select(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", (int)devid, selected ? "assert" :
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"de-assert");
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#if defined(CONFIG_SENSORS_MAX31855)
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if (devid == SPIDEV_TEMPERATURE(0))
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{
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stm32_gpiowrite(GPIO_MAX31855_CS, !selected);
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}
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#endif
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#if defined(CONFIG_SENSORS_MAX6675)
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if (devid == SPIDEV_TEMPERATURE(0))
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{
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stm32_gpiowrite(GPIO_MAX6675_CS, !selected);
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}
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#endif
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#if defined(CONFIG_MMCSD_SPI)
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if (devid == SPIDEV_MMCSD(0))
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{
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stm32_gpiowrite(GPIO_MMCSD_NSS, !selected);
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}
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#endif
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}
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uint8_t stm32_spi2status(struct spi_dev_s *dev, uint32_t devid)
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{
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uint8_t ret = 0;
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#if defined(CONFIG_MMCSD_SPI)
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if (devid == SPIDEV_MMCSD(0))
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{
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/* Note: SD_DET is pulled high when there's no SD card present. */
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ret = stm32_gpioread(GPIO_MMCSD_NCD) ? 0 : 1;
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}
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#endif
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return ret;
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}
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#endif
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#ifdef CONFIG_STM32_SPI3
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void stm32_spi3select(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", (int)devid, selected ? "assert" :
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"de-assert");
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#if defined(CONFIG_WL_GS2200M)
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if (devid == SPIDEV_WIRELESS(0))
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{
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stm32_gpiowrite(GPIO_GS2200M_CS, !selected);
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}
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#endif
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}
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uint8_t stm32_spi3status(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: stm32_spi1cmddata
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*
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* Description:
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* Set or clear the SH1101A A0 or SD1306 D/C n bit to select data (true)
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* or command (false). This function must be provided by platform-specific
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* logic. This is an implementation of the cmddata method of the SPI
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* interface defined by struct spi_ops_s (see include/nuttx/spi/spi.h).
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*
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* Input Parameters:
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*
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* spi - SPI device that controls the bus the device that requires the CMD/
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* DATA selection.
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* devid - If there are multiple devices on the bus, this selects which one
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* to select cmd or data. NOTE: This design restricts, for example,
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* one one SPI display per SPI bus.
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* cmd - true: select command; false: select data
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*
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* Returned Value:
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* None
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*
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****************************************************************************/
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#ifdef CONFIG_SPI_CMDDATA
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#ifdef CONFIG_STM32_SPI1
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int stm32_spi1cmddata(struct spi_dev_s *dev, uint32_t devid, bool cmd)
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{
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#if defined(CONFIG_LCD_ST7567) || defined(CONFIG_LCD_ST7789)
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if (devid == SPIDEV_DISPLAY(0))
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{
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/* This is the Data/Command control pad which determines whether the
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* data bits are data or a command.
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*/
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stm32_gpiowrite(STM32_LCD_RS, !cmd);
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return OK;
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}
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#endif
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#if defined(CONFIG_LCD_UG2864AMBAG01) || defined(CONFIG_LCD_UG2864HSWEG01) || \
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defined(CONFIG_LCD_SSD1351)
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if (devid == SPIDEV_DISPLAY(0))
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{
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/* "This is the Data/Command control pad which determines whether the
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* data bits are data or a command.
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*
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* A0 = "H": the inputs at D0 to D7 are treated as display data.
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* A0 = "L": the inputs at D0 to D7 are transferred to the command
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* registers."
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*/
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# if defined(CONFIG_LCD_UG2864AMBAG01)
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stm32_gpiowrite(GPIO_OLED_A0, !cmd);
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# endif
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# if defined(CONFIG_LCD_UG2864HSWEG01) || defined(CONFIG_LCD_SSD1351)
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stm32_gpiowrite(GPIO_OLED_DC, !cmd);
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# endif
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return OK;
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}
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#endif
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return -ENODEV;
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}
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#endif
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#ifdef CONFIG_STM32_SPI2
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int stm32_spi2cmddata(struct spi_dev_s *dev, uint32_t devid, bool cmd)
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{
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return -ENODEV;
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}
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#endif
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#ifdef CONFIG_STM32_SPI3
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int stm32_spi3cmddata(struct spi_dev_s *dev, uint32_t devid, bool cmd)
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{
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return -ENODEV;
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}
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#endif
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#endif /* CONFIG_SPI_CMDDATA */
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#endif /* CONFIG_STM32_SPI1 || CONFIG_STM32_SPI2 */
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