172 lines
5.6 KiB
C
172 lines
5.6 KiB
C
/****************************************************************************
|
|
* boards/arm/lpc17xx_40xx/open1788/src/lpc17_40_ssp.c
|
|
*
|
|
* Licensed to the Apache Software Foundation (ASF) under one or more
|
|
* contributor license agreements. See the NOTICE file distributed with
|
|
* this work for additional information regarding copyright ownership. The
|
|
* ASF licenses this file to you under the Apache License, Version 2.0 (the
|
|
* "License"); you may not use this file except in compliance with the
|
|
* License. You may obtain a copy of the License at
|
|
*
|
|
* http://www.apache.org/licenses/LICENSE-2.0
|
|
*
|
|
* Unless required by applicable law or agreed to in writing, software
|
|
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
|
|
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
|
|
* License for the specific language governing permissions and limitations
|
|
* under the License.
|
|
*
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* Included Files
|
|
****************************************************************************/
|
|
|
|
#include <nuttx/config.h>
|
|
|
|
#include <stdint.h>
|
|
#include <stdbool.h>
|
|
#include <debug.h>
|
|
|
|
#include <nuttx/spi/spi.h>
|
|
|
|
#include <arch/board/board.h>
|
|
|
|
#include "arm_arch.h"
|
|
#include "chip.h"
|
|
#include "lpc17_40_gpio.h"
|
|
#include "lpc17_40_ssp.h"
|
|
#include "open1788.h"
|
|
|
|
#if defined(CONFIG_LPC17_40_SSP0) || defined(CONFIG_LPC17_40_SSP1) || \
|
|
defined(CONFIG_LPC17_40_SSP2)
|
|
|
|
/****************************************************************************
|
|
* Pre-processor Definitions
|
|
****************************************************************************/
|
|
|
|
/* Dump GPIO registers */
|
|
|
|
#ifdef CONFIG_DEBUG_GPIO_INFO
|
|
# define ssp_dumpgpio(p,m) lpc17_40_dumpgpio(p,m)
|
|
#else
|
|
# define ssp_dumpgpio(p,m)
|
|
#endif
|
|
|
|
/****************************************************************************
|
|
* Public Functions
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* Name: open1788_sspdev_initialize
|
|
*
|
|
* Description:
|
|
* Called to configure SPI chip select GPIO pins for the LPC1766-STK.
|
|
*
|
|
****************************************************************************/
|
|
|
|
void weak_function open1788_sspdev_initialize(void)
|
|
{
|
|
/* Configure the SSP0 chip select GPIOs. */
|
|
|
|
#ifdef CONFIG_LPC17_40_SSP0
|
|
#endif
|
|
|
|
/* Configure SSP1 chip select GPIOs. This includes the touchscreen on the
|
|
* the LCD module.
|
|
*/
|
|
|
|
#ifdef CONFIG_LPC17_40_SSP1
|
|
ssp_dumpgpio(GPIO_TC_CS, "BEFORE SSP1 Initialization");
|
|
lpc17_40_configgpio(GPIO_TC_CS);
|
|
ssp_dumpgpio(GPIO_TC_CS, "AFTER SSP1 Initialization");
|
|
#endif
|
|
|
|
/* Configure the SSP2 chip select GPIOs. */
|
|
|
|
#ifdef CONFIG_LPC17_40_SSP2
|
|
#endif
|
|
}
|
|
|
|
/****************************************************************************
|
|
* Name: lpc17_40_ssp0/1/2select and lpc17_40_ssp0/1/2status
|
|
*
|
|
* Description:
|
|
* The external functions, lpc17_40_ssp0/1/2select and
|
|
* lpc17_40_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/spi.h).
|
|
* All other methods (including lpc17_40_sspbus_initialize())
|
|
* are provided by common LPC17xx/LPC40xx logic.
|
|
* To use this common SPI logic on your board:
|
|
*
|
|
* 1. Provide logic in lpc17_40_boardinitialize() to configure SPI/SSP
|
|
* chip select pins.
|
|
* 2. Provide lpc17_40_ssp0/1/2select() and lpc17_40_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_40_sspbus_initialize() in your low level
|
|
* application initialization logic
|
|
* 4. The handle returned by lpc17_40_sspbus_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).
|
|
*
|
|
****************************************************************************/
|
|
|
|
#ifdef CONFIG_LPC17_40_SSP0
|
|
void lpc17_40_ssp0select(FAR struct spi_dev_s *dev, uint32_t devid,
|
|
bool selected)
|
|
{
|
|
spiinfo("devid: %d CS: %s\n", (int)devid,
|
|
selected ? "assert" : "de-assert");
|
|
}
|
|
|
|
uint8_t lpc17_40_ssp0status(FAR struct spi_dev_s *dev, uint32_t devid)
|
|
{
|
|
spiinfo("Returning nothing\n");
|
|
return 0;
|
|
}
|
|
#endif
|
|
|
|
#ifdef CONFIG_LPC17_40_SSP1
|
|
void lpc17_40_ssp1select(FAR struct spi_dev_s *dev, uint32_t devid,
|
|
bool selected)
|
|
{
|
|
spiinfo("devid: %d CS: %s\n", (int)devid,
|
|
selected ? "assert" : "de-assert");
|
|
if (devid == SPIDEV_TOUCHSCREEN(0))
|
|
{
|
|
/* Assert/de-assert the CS pin to the touchscreen */
|
|
|
|
ssp_dumpgpio(GPIO_TC_CS, "lpc17_40_ssp1select() Entry");
|
|
lpc17_40_gpiowrite(GPIO_TC_CS, !selected);
|
|
ssp_dumpgpio(GPIO_TC_CS, "lpc17_40_ssp1select() Exit");
|
|
}
|
|
}
|
|
|
|
uint8_t lpc17_40_ssp1status(FAR struct spi_dev_s *dev, uint32_t devid)
|
|
{
|
|
spiinfo("Returning nothing\n");
|
|
return 0;
|
|
}
|
|
#endif
|
|
|
|
#ifdef CONFIG_LPC17_40_SSP2
|
|
void lpc17_40_ssp2select(FAR struct spi_dev_s *dev, uint32_t devid,
|
|
bool selected)
|
|
{
|
|
spiinfo("devid: %d CS: %s\n", (int)devid,
|
|
selected ? "assert" : "de-assert");
|
|
}
|
|
|
|
uint8_t lpc17_40_ssp2status(FAR struct spi_dev_s *dev, uint32_t devid)
|
|
{
|
|
spiinfo("Returning nothing\n");
|
|
return 0;
|
|
}
|
|
#endif
|
|
|
|
#endif /* CONFIG_LPC17_40_SSP0 || CONFIG_LPC17_40_SSP1 || CONFIG_LPC17_40_SSP2 */
|