206 lines
7.0 KiB
C
206 lines
7.0 KiB
C
|
/****************************************************************************
|
||
|
* configs/open1788/src/lpc17_ssp.c
|
||
|
* arch/arm/src/board/lpc17_ssp.c
|
||
|
*
|
||
|
* Copyright (C) 2013 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 "lpc17_gpio.h"
|
||
|
#include "lpc17_ssp.h"
|
||
|
#include "open1788.h"
|
||
|
|
||
|
#if defined(CONFIG_LPC17_SSP0) || defined(CONFIG_LPC17_SSP1) || \
|
||
|
defined(CONFIG_LPC17_SSP2)
|
||
|
|
||
|
/****************************************************************************
|
||
|
* Definitions
|
||
|
****************************************************************************/
|
||
|
|
||
|
/* Debug ********************************************************************/
|
||
|
|
||
|
#ifdef CONFIG_DEBUG_SPI
|
||
|
# define sspdbg lldbg
|
||
|
# ifdef CONFIG_DEBUG_VERBOSE
|
||
|
# define sspvdbg lldbg
|
||
|
# else
|
||
|
# define sspvdbg(x...)
|
||
|
# endif
|
||
|
#else
|
||
|
# define sspdbg(x...)
|
||
|
# define sspvdbg(x...)
|
||
|
#endif
|
||
|
|
||
|
/* Dump GPIO registers */
|
||
|
|
||
|
#ifdef CONFIG_DEBUG_VERBOSE
|
||
|
# define ssp_dumpgpio(p,m) lpc17_dumpgpio(p,m)
|
||
|
#else
|
||
|
# define ssp_dumpgpio(p,m)
|
||
|
#endif
|
||
|
|
||
|
/****************************************************************************
|
||
|
* Private Types
|
||
|
****************************************************************************/
|
||
|
|
||
|
/****************************************************************************
|
||
|
* Private Data
|
||
|
****************************************************************************/
|
||
|
|
||
|
/****************************************************************************
|
||
|
* Private Functions
|
||
|
****************************************************************************/
|
||
|
|
||
|
/****************************************************************************
|
||
|
* Public Functions
|
||
|
****************************************************************************/
|
||
|
|
||
|
/****************************************************************************
|
||
|
* Name: open1788_sspinitialize
|
||
|
*
|
||
|
* Description:
|
||
|
* Called to configure SPI chip select GPIO pins for the LPC1766-STK.
|
||
|
*
|
||
|
****************************************************************************/
|
||
|
|
||
|
void weak_function open1788_sspinitialize(void)
|
||
|
{
|
||
|
/* Configure the SSP0 chip select GPIOs. */
|
||
|
|
||
|
#ifdef CONFIG_LPC17_SSP0
|
||
|
#endif
|
||
|
|
||
|
/* Configure SSP1 chip select GPIOs. This includes the touchscreen on the
|
||
|
* the LCD module.
|
||
|
*/
|
||
|
|
||
|
#ifdef CONFIG_LPC17_SSP1
|
||
|
ssp_dumpgpio(GPIO_TC_CS, "BEFORE SSP1 Initialization");
|
||
|
lpc17_configgpio(GPIO_TC_CS);
|
||
|
ssp_dumpgpio(GPIO_TC_CS, "AFTER SSP1 Initialization");
|
||
|
#endif
|
||
|
|
||
|
/* Configure the SSP2 chip select GPIOs. */
|
||
|
|
||
|
#ifdef CONFIG_LPC17_SSP2
|
||
|
#endif
|
||
|
}
|
||
|
|
||
|
/************************************************************************************
|
||
|
* Name: lpc17_ssp0/1/2select and lpc17_ssp0/1/2status
|
||
|
*
|
||
|
* Description:
|
||
|
* The external functions, lpc17_ssp0/1/2select and lpc17_ssp0/1/2status
|
||
|
* 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 lpc17_sspinitialize())
|
||
|
* are provided by common LPC17xx logic. To use this common SPI logic on your
|
||
|
* board:
|
||
|
*
|
||
|
* 1. Provide logic in lpc17_boardinitialize() to configure SPI/SSP chip select
|
||
|
* pins.
|
||
|
* 2. Provide lpc17_ssp0/1/2select() and lpc17_ssp0/1/2status() 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 lpc17_sspinitialize() in your low level application
|
||
|
* initialization logic
|
||
|
* 4. The handle returned by lpc17_sspinitialize() 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_LPC17_SSP0
|
||
|
void lpc17_ssp0select(FAR struct spi_dev_s *dev, enum spi_dev_e devid, bool selected)
|
||
|
{
|
||
|
sspdbg("devid: %d CS: %s\n", (int)devid, selected ? "assert" : "de-assert");
|
||
|
}
|
||
|
|
||
|
uint8_t lpc17_ssp0status(FAR struct spi_dev_s *dev, enum spi_dev_e devid)
|
||
|
{
|
||
|
sspdbg("Returning nothing\n");
|
||
|
return 0;
|
||
|
}
|
||
|
#endif
|
||
|
|
||
|
#ifdef CONFIG_LPC17_SSP1
|
||
|
void lpc17_ssp1select(FAR struct spi_dev_s *dev, enum spi_dev_e devid, bool selected)
|
||
|
{
|
||
|
sspdbg("devid: %d CS: %s\n", (int)devid, selected ? "assert" : "de-assert");
|
||
|
if (devid == SPIDEV_TOUCHSCREEN)
|
||
|
{
|
||
|
/* Assert/de-assert the CS pin to the card */
|
||
|
|
||
|
ssp_dumpgpio(GPIO_TC_CS, "lpc17_ssp1select() Entry");
|
||
|
lpc17_gpiowrite(GPIO_TC_CS, !selected);
|
||
|
ssp_dumpgpio(GPIO_TC_CS, "lpc17_ssp1select() Exit");
|
||
|
}
|
||
|
}
|
||
|
|
||
|
uint8_t lpc17_ssp1status(FAR struct spi_dev_s *dev, enum spi_dev_e devid)
|
||
|
{
|
||
|
sspdbg("Returning nothing\n");
|
||
|
return 0;
|
||
|
}
|
||
|
#endif
|
||
|
|
||
|
#ifdef CONFIG_LPC17_SSP2
|
||
|
void lpc17_ssp2select(FAR struct spi_dev_s *dev, enum spi_dev_e devid, bool selected)
|
||
|
{
|
||
|
sspdbg("devid: %d CS: %s\n", (int)devid, selected ? "assert" : "de-assert");
|
||
|
}
|
||
|
|
||
|
uint8_t lpc17_ssp2status(FAR struct spi_dev_s *dev, enum spi_dev_e devid)
|
||
|
{
|
||
|
sspdbg("Returning nothing\n");
|
||
|
return 0;
|
||
|
}
|
||
|
#endif
|
||
|
|
||
|
#endif /* CONFIG_LPC17_SSP0 || CONFIG_LPC17_SSP1 || CONFIG_LPC17_SSP2 */
|