diff options
Diffstat (limited to 'nuttx/configs/fire-stm32v2/src/up_spi.c')
| -rw-r--r-- | nuttx/configs/fire-stm32v2/src/up_spi.c | 215 |
1 files changed, 215 insertions, 0 deletions
diff --git a/nuttx/configs/fire-stm32v2/src/up_spi.c b/nuttx/configs/fire-stm32v2/src/up_spi.c new file mode 100644 index 000000000..000b8ad3b --- /dev/null +++ b/nuttx/configs/fire-stm32v2/src/up_spi.c @@ -0,0 +1,215 @@ +/************************************************************************************ + * configs/stm3210e_eval/src/up_spi.c + * arch/arm/src/board/up_spi.c + * + * Copyright (C) 2009 Gregory Nutt. All rights reserved. + * Author: Gregory Nutt <gnutt@nuttx.org> + * + * 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 <nuttx/config.h> + +#include <stdint.h> +#include <stdbool.h> +#include <debug.h> + +#include <nuttx/spi.h> +#include <arch/board/board.h> + +#include "up_arch.h" +#include "chip.h" +#include "stm32_internal.h" +#include "stm3210e-internal.h" + +#if defined(CONFIG_STM32_SPI1) || defined(CONFIG_STM32_SPI2) + +/************************************************************************************ + * Definitions + ************************************************************************************/ + +/* Enables debug output from this file (needs CONFIG_DEBUG too) */ + +#undef SPI_DEBUG /* Define to enable debug */ +#undef SPI_VERBOSE /* Define to enable verbose debug */ + +#ifdef SPI_DEBUG +# define spidbg lldbg +# ifdef SPI_VERBOSE +# define spivdbg lldbg +# else +# define spivdbg(x...) +# endif +#else +# undef SPI_VERBOSE +# define spidbg(x...) +# define spivdbg(x...) +#endif + +/************************************************************************************ + * Private Functions + ************************************************************************************/ + +/************************************************************************************ + * Public Functions + ************************************************************************************/ + +/************************************************************************************ + * Name: stm32_spiinitialize + * + * Description: + * Called to configure SPI chip select GPIO pins for the STM3210E-EVAL board. + * + ************************************************************************************/ + +void weak_function stm32_spiinitialize(void) +{ + /* NOTE: Clocking for SPI1 and/or SPI2 was already provided in stm32_rcc.c. + * Configurations of SPI pins is performed in stm32_spi.c. + * Here, we only initialize chip select pins unique to the board + * architecture. + */ + +#ifdef CONFIG_STM32_SPI1 + /* Configure the TFT/Touchscreen CS GPIO */ + +#if 0 /* Need to study this */ + stm32_configgpio(GPIO_LCD_CS); +#endif + + /* Configure the TFT/Touchscreen and ENC28J60 or SPI-based FLASH PIOs */ + + /* Configure ENC28J60 SPI1 CS (also RESET and interrupt pins) */ + +#ifdef CONFIG_NET_ENC28J60 + stm32_configgpio(GPIO_ENC28J60_CS); + stm32_configgpio(GPIO_ENC28J60_RESET); + stm32_configgpio(GPIO_ENC28J60_INTR); +#else + + /* Configure FLASH SPI1 CS */ + + stm32_configgpio(GPIO_FLASH_CS); +#endif + +#endif /* CONFIG_STM32_SPI1 */ + +#ifdef CONFIG_STM32_SPI2 + /* Configure the MP3 SPI2 CS GPIO */ + + stm32_configgpio(GPIO_MP3_CS); + +#endif /* CONFIG_STM32_SPI2 */ +} + +/**************************************************************************** + * Name: stm32_spi1/2/3select and stm32_spi1/2/3status + * + * Description: + * The external functions, stm32_spi1/2/3select and stm32_spi1/2/3status must be + * provided by board-specific logic. They are implementations of the select + * and status methods of the SPI interface defined by struct spi_ops_s (see + * include/nuttx/spi.h). All other methods (including up_spiinitialize()) + * are provided by common STM32 logic. To use this common SPI logic on your + * board: + * + * 1. Provide logic in stm32_boardinitialize() to configure SPI chip select + * pins. + * 2. Provide stm32_spi1/2/3select() and stm32_spi1/2/3status() functions in your + * board-specific logic. These functions will perform chip selection and + * status operations using GPIOs in the way your board is configured. + * 3. Add a calls to up_spiinitialize() in your low level application + * initialization logic + * 4. The handle returned by up_spiinitialize() 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). + * + ****************************************************************************/ + +#ifdef CONFIG_STM32_SPI1 +void stm32_spi1select(FAR struct spi_dev_s *dev, enum spi_dev_e devid, bool selected) +{ + spidbg("devid: %d CS: %s\n", (int)devid, selected ? "assert" : "de-assert"); + +#if 0 /* Need to study this */ + if (devid == SPIDEV_FLASH) + { + /* Set the GPIO low to select and high to de-select */ + + stm32_gpiowrite(GPIO_FLASH_CS, !selected); + } + else +#ifdef CONFIG_NET_ENC28J60 + if (devid == SPIDEV_ETHERNET) + { + /* Set the GPIO low to select and high to de-select */ + + stm32_gpiowrite(GPIO_ENC28J60_CS, !selected); + } +#else + if (devid == SPIDEV_FLASH) + { + /* Set the GPIO low to select and high to de-select */ + + stm32_gpiowrite(GPIO_FLASH_CS, !selected); + } +#endif +} + +uint8_t stm32_spi1status(FAR struct spi_dev_s *dev, enum spi_dev_e devid) +{ + return SPI_STATUS_PRESENT; +} +#endif + +#ifdef CONFIG_STM32_SPI2 +void stm32_spi2select(FAR struct spi_dev_s *dev, enum spi_dev_e devid, bool selected) +{ + spidbg("devid: %d CS: %s\n", (int)devid, selected ? "assert" : "de-assert"); + + if (devid == SPIDEV_AUDIO) + { + /* Set the GPIO low to select and high to de-select */ + + stm32_gpiowrite(GPIO_MP3_CS, !selected); + } +} + +uint8_t stm32_spi2status(FAR struct spi_dev_s *dev, enum spi_dev_e devid) +{ + return SPI_STATUS_PRESENT; +} +#endif + +#endif /* CONFIG_STM32_SPI1 || CONFIG_STM32_SPI2 */ |