SAM4E-EK: Add a touchscreen driver (untestd on initial checkin)
This commit is contained in:
Gregory Nutt
parent
c48bd737d0
commit
c50fc79798
@ -7333,3 +7333,5 @@
|
||||
Charles Ash (2014-5-12).
|
||||
* configs/sam4e-ek/src/sam_ili9325.c: Add an LCD driver for the SAM4E-EK
|
||||
board. Untested on initial check-in (2014-5-13).
|
||||
* configs/sam4e-ek/src/sam_ads7843e.c: Add a touchscreen driver for the
|
||||
SAM4E-EK board. Untested on initial check-in (2014-5-13).
|
||||
|
||||
@ -70,15 +70,12 @@ choice
|
||||
|
||||
config SAM4EEK_LCD_RGB565
|
||||
bool "RGB565"
|
||||
default n
|
||||
|
||||
config SAM4EEK_LCD_RGB24
|
||||
bool "RGB24 / RGB888"
|
||||
default n
|
||||
|
||||
config SAM4EEK_LCD_RGB32
|
||||
bool "RGB32"
|
||||
default n
|
||||
|
||||
endchoice # ILI9325-based LCD Color Configuration
|
||||
|
||||
|
||||
@ -857,8 +857,8 @@ Touchscreen
|
||||
CONFIG_SPI_OWNBUS=y : Smaller code if this is the only SPI device
|
||||
|
||||
CONFIG_INPUT=y : Enable support for input devices
|
||||
CONFIG_INPUT_ADS7843E=y : Enable support for the XPT2046
|
||||
CONFIG_ADS7843E_SPIDEV=2 : Use SPI CS 2 for communication
|
||||
CONFIG_INPUT_ADS7843E=y : Enable support for the ADS7843E
|
||||
CONFIG_ADS7843E_SPIDEV=0 : Use SPI CS 0 for communication
|
||||
CONFIG_ADS7843E_SPIMODE=0 : Use SPI mode 0
|
||||
CONFIG_ADS7843E_FREQUENCY=1000000 : SPI BAUD 1MHz
|
||||
CONFIG_ADS7843E_SWAPXY=y : If landscape orientation
|
||||
@ -889,9 +889,6 @@ Touchscreen
|
||||
CONFIG_DEBUG_VERBOSE=y : Enable verbose debug output
|
||||
CONFIG_DEBUG_INPUT=y : Enable debug output from input devices
|
||||
|
||||
STATUS
|
||||
2014-3-27: As of this writing, the touchscreen is untested.
|
||||
|
||||
ILI9325-Based LCD
|
||||
=================
|
||||
|
||||
@ -1335,6 +1332,96 @@ Configurations
|
||||
slot. Support for the SD slot can be enabled following the
|
||||
instructions provided above in the paragraph entitled "HSMCI."
|
||||
|
||||
11. This configuration has been used for verifying the touchscreen on
|
||||
on the SAM4E-EK LCD module.
|
||||
|
||||
The NSH configuration can be used to verify the ADS7843E touchscreen on
|
||||
the SAM4E-EK LCD. With these modifications, you can include the touchscreen
|
||||
test program at apps/examples/touchscreen as an NSH built-in application.
|
||||
You can enable the touchscreen and test by modifying the default
|
||||
configuration in the following ways:
|
||||
|
||||
Device Drivers
|
||||
CONFIG_SPI=y : Enable SPI support
|
||||
CONFIG_SPI_EXCHANGE=y : The exchange() method is supported
|
||||
CONFIG_SPI_OWNBUS=y : Smaller code if this is the only SPI device
|
||||
|
||||
CONFIG_INPUT=y : Enable support for input devices
|
||||
CONFIG_INPUT_ADS7843E=y : Enable support for the ADS7843E
|
||||
CONFIG_ADS7843E_SPIDEV=0 : Use SPI CS 0 for communication
|
||||
CONFIG_ADS7843E_SPIMODE=0 : Use SPI mode 0
|
||||
CONFIG_ADS7843E_FREQUENCY=1000000 : SPI BAUD 1MHz
|
||||
CONFIG_ADS7843E_SWAPXY=y : If landscape orientation
|
||||
CONFIG_ADS7843E_THRESHX=51 : These will probably need to be tuned
|
||||
CONFIG_ADS7843E_THRESHY=39
|
||||
|
||||
System Type -> Peripherals:
|
||||
CONFIG_SAM34_SPI0=y : Enable support for SPI
|
||||
|
||||
System Type:
|
||||
CONFIG_SAM34_GPIO_IRQ=y : GPIO interrupt support
|
||||
CONFIG_SAM34_GPIOA_IRQ=y : Enable GPIO interrupts from port A
|
||||
|
||||
RTOS Features:
|
||||
CONFIG_DISABLE_SIGNALS=n : Signals are required
|
||||
|
||||
Library Support:
|
||||
CONFIG_SCHED_WORKQUEUE=y : Work queue support required
|
||||
|
||||
Application Configuration:
|
||||
CONFIG_EXAMPLES_TOUCHSCREEN=y : Enable the touchscreen built-in test
|
||||
|
||||
Defaults should be okay for related touchscreen settings. Touchscreen
|
||||
debug output on UART0 can be enabled with:
|
||||
|
||||
Build Setup:
|
||||
CONFIG_DEBUG=y : Enable debug features
|
||||
CONFIG_DEBUG_VERBOSE=y : Enable verbose debug output
|
||||
CONFIG_DEBUG_INPUT=y : Enable debug output from input devices
|
||||
|
||||
11. This configuration can be re-configured to test the on-board LCD
|
||||
module.
|
||||
|
||||
System Type -> AT91SAM3/4 Configuration Options
|
||||
CONFIG_SAM34_SMC=y : SMC support
|
||||
|
||||
Device Drivers -> LCD Driver Support
|
||||
CONFIG_LCD=y : Enable LCD support
|
||||
CONFIG_NX_LCDDRIVER=y : LCD graphics device
|
||||
CONFIG_LCD_MAXCONTRAST=1 : Value should not matter
|
||||
CONFIG_LCD_MAXPOWER=64 : Must be > 16
|
||||
CONFIG_LCD_LANDSCAPE=y : Landscape orientation
|
||||
|
||||
Board Selection
|
||||
CONFIG_SAM4EEK_LCD_RGB565=y : Color resolution
|
||||
CONFIG_SAM4EEK_LCD_BGCOLOR=0x00 : Initial background color
|
||||
|
||||
Graphics Support
|
||||
CONFIG_NX=y
|
||||
|
||||
Graphics Support -> Supported Pixel Depths
|
||||
CONFIG_NX_DISABLE_1BPP=y : Only 16BPP supported
|
||||
CONFIG_NX_DISABLE_2BPP=y
|
||||
CONFIG_NX_DISABLE_4BPP=y
|
||||
CONFIG_NX_DISABLE_8BPP=y
|
||||
CONFIG_NX_DISABLE_24BPP=y
|
||||
CONFIG_NX_DISABLE_32BPP=y
|
||||
|
||||
Graphics Support -> Font Selections
|
||||
CONFIG_NXFONTS_CHARBITS=7
|
||||
CONFIG_NXFONT_SANS22X29B=y
|
||||
CONFIG_NXFONT_SANS23X27=y
|
||||
|
||||
Application Configuration -> Examples
|
||||
CONFIG_EXAMPLES_NXLINES=y
|
||||
CONFIG_EXAMPLES_NXLINES_BGCOLOR=0x0320
|
||||
CONFIG_EXAMPLES_NXLINES_LINEWIDTH=16
|
||||
CONFIG_EXAMPLES_NXLINES_LINECOLOR=0xffe0
|
||||
CONFIG_EXAMPLES_NXLINES_BORDERWIDTH=4
|
||||
CONFIG_EXAMPLES_NXLINES_BORDERCOLOR=0xffe0
|
||||
CONFIG_EXAMPLES_NXLINES_CIRCLECOLOR=0xf7bb
|
||||
CONFIG_EXAMPLES_NXLINES_BPP=16
|
||||
|
||||
STATUS:
|
||||
2014-3-24: DMA is not currently functional and without DMA, there
|
||||
may not be reliable data transfers at high speeds due
|
||||
|
||||
@ -46,10 +46,6 @@ ifeq ($(CONFIG_HAVE_CXXINITIALIZE),y)
|
||||
CSRCS += sam_cxxinitialize.c
|
||||
endif
|
||||
|
||||
ifeq ($(CONFIG_SAM4EEK_ILI9325),y)
|
||||
CSRCS += sam_ili9325.c
|
||||
endif
|
||||
|
||||
ifeq ($(CONFIG_NSH_ARCHINIT),y)
|
||||
CSRCS += sam_nsh.c
|
||||
endif
|
||||
@ -62,6 +58,10 @@ ifeq ($(CONFIG_LCD),y)
|
||||
CSRCS += sam_ili9325.c
|
||||
endif
|
||||
|
||||
ifeq ($(CONFIG_INPUT_ADS7843E),y)
|
||||
CSRCS += sam_ads7843e.c
|
||||
endif
|
||||
|
||||
ifeq ($(CONFIG_SAM34_SPI0),y)
|
||||
CSRCS += sam_spi.c
|
||||
ifeq ($(CONFIG_MTD_AT25),y)
|
||||
|
||||
290
configs/sam4e-ek/src/sam_ads7843e.c
Normal file
290
configs/sam4e-ek/src/sam_ads7843e.c
Normal file
@ -0,0 +1,290 @@
|
||||
/************************************************************************************
|
||||
* configs/sam4e-ek/src/sam_ads7843e.c
|
||||
*
|
||||
* Copyright (C) 2014 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 <stdbool.h>
|
||||
#include <stdio.h>
|
||||
#include <debug.h>
|
||||
#include <assert.h>
|
||||
#include <errno.h>
|
||||
|
||||
#include <nuttx/spi/spi.h>
|
||||
#include <nuttx/input/touchscreen.h>
|
||||
#include <nuttx/input/ads7843e.h>
|
||||
|
||||
#include "sam_gpio.h"
|
||||
#include "sam4e-ek.h"
|
||||
|
||||
#if defined(CONFIG_INPUT) && defined(CONFIG_INPUT_ADS7843E)
|
||||
|
||||
/****************************************************************************
|
||||
* Pre-Processor Definitions
|
||||
****************************************************************************/
|
||||
/* Configuration ************************************************************/
|
||||
|
||||
#ifndef CONFIG_SAM34_SPI0
|
||||
# error "Touchscreen support requires CONFIG_SAM34_SPI0"
|
||||
#endif
|
||||
|
||||
#ifndef CONFIG_SAM34_GPIOA_IRQ
|
||||
# error "Touchscreen support requires CONFIG_SAM34_GPIOA_IRQ"
|
||||
#endif
|
||||
|
||||
#ifndef CONFIG_ADS7843E_FREQUENCY
|
||||
# define CONFIG_ADS7843E_FREQUENCY 500000
|
||||
#endif
|
||||
|
||||
#ifndef CONFIG_ADS7843E_SPIDEV
|
||||
# define CONFIG_ADS7843E_SPIDEV TSC_CSNUM
|
||||
#endif
|
||||
|
||||
#if CONFIG_ADS7843E_SPIDEV != TSC_CSNUM
|
||||
# error "CONFIG_ADS7843E_SPIDEV must have the same value as TSC_CSNUM"
|
||||
#endif
|
||||
|
||||
#ifndef CONFIG_ADS7843E_DEVMINOR
|
||||
# define CONFIG_ADS7843E_DEVMINOR 0
|
||||
#endif
|
||||
|
||||
/****************************************************************************
|
||||
* Static Function Prototypes
|
||||
****************************************************************************/
|
||||
|
||||
/* IRQ/GPIO access callbacks. These operations all hidden behind
|
||||
* callbacks to isolate the ADS7843E driver from differences in GPIO
|
||||
* interrupt handling by varying boards and MCUs. If possible,
|
||||
* interrupts should be configured on both rising and falling edges
|
||||
* so that contact and loss-of-contact events can be detected.
|
||||
*
|
||||
* attach - Attach the ADS7843E interrupt handler to the GPIO interrupt
|
||||
* enable - Enable or disable the GPIO interrupt
|
||||
* clear - Acknowledge/clear any pending GPIO interrupt
|
||||
* pendown - Return the state of the pen down GPIO input
|
||||
*/
|
||||
|
||||
static int tsc_attach(FAR struct ads7843e_config_s *state, xcpt_t isr);
|
||||
static void tsc_enable(FAR struct ads7843e_config_s *state, bool enable);
|
||||
static void tsc_clear(FAR struct ads7843e_config_s *state);
|
||||
static bool tsc_busy(FAR struct ads7843e_config_s *state);
|
||||
static bool tsc_pendown(FAR struct ads7843e_config_s *state);
|
||||
|
||||
/****************************************************************************
|
||||
* Private Data
|
||||
****************************************************************************/
|
||||
|
||||
/* A reference to a structure of this type must be passed to the ADS7843E
|
||||
* driver. This structure provides information about the configuration
|
||||
* of the ADS7843E and provides some board-specific hooks.
|
||||
*
|
||||
* Memory for this structure is provided by the caller. It is not copied
|
||||
* by the driver and is presumed to persist while the driver is active. The
|
||||
* memory must be writeable because, under certain circumstances, the driver
|
||||
* may modify frequency or X plate resistance values.
|
||||
*/
|
||||
|
||||
static struct ads7843e_config_s g_tscinfo =
|
||||
{
|
||||
.frequency = CONFIG_ADS7843E_FREQUENCY,
|
||||
|
||||
.attach = tsc_attach,
|
||||
.enable = tsc_enable,
|
||||
.clear = tsc_clear,
|
||||
.busy = tsc_busy,
|
||||
.pendown = tsc_pendown,
|
||||
};
|
||||
|
||||
/****************************************************************************
|
||||
* Private Functions
|
||||
****************************************************************************/
|
||||
|
||||
/* IRQ/GPIO access callbacks. These operations all hidden behind
|
||||
* callbacks to isolate the ADS7843E driver from differences in GPIO
|
||||
* interrupt handling by varying boards and MCUs. If possible,
|
||||
* interrupts should be configured on both rising and falling edges
|
||||
* so that contact and loss-of-contact events can be detected.
|
||||
*
|
||||
* attach - Attach the ADS7843E interrupt handler to the GPIO interrupt
|
||||
* enable - Enable or disable the GPIO interrupt
|
||||
* clear - Acknowledge/clear any pending GPIO interrupt
|
||||
* pendown - Return the state of the pen down GPIO input
|
||||
*/
|
||||
|
||||
static int tsc_attach(FAR struct ads7843e_config_s *state, xcpt_t isr)
|
||||
{
|
||||
/* Attach the ADS7843E interrupt */
|
||||
|
||||
ivdbg("Attaching %p to IRQ %d\n", isr, SAM_TCS_IRQ);
|
||||
return irq_attach(SAM_TCS_IRQ, isr);
|
||||
}
|
||||
|
||||
static void tsc_enable(FAR struct ads7843e_config_s *state, bool enable)
|
||||
{
|
||||
/* Attach and enable, or detach and disable */
|
||||
|
||||
ivdbg("IRQ:%d enable:%d\n", SAM_TCS_IRQ, enable);
|
||||
if (enable)
|
||||
{
|
||||
sam_gpioirqenable(SAM_TCS_IRQ);
|
||||
}
|
||||
else
|
||||
{
|
||||
sam_gpioirqdisable(SAM_TCS_IRQ);
|
||||
}
|
||||
}
|
||||
|
||||
static void tsc_clear(FAR struct ads7843e_config_s *state)
|
||||
{
|
||||
/* Does nothing */
|
||||
}
|
||||
|
||||
static bool tsc_busy(FAR struct ads7843e_config_s *state)
|
||||
{
|
||||
#if defined(CONFIG_DEBUG_INPUT) && defined(CONFIG_DEBUG_VERBOSE)
|
||||
static bool last = (bool)-1;
|
||||
#endif
|
||||
|
||||
/* BUSY is high impedance when CS is high (not selected). When CS is
|
||||
* is low, BUSY is active high.
|
||||
*/
|
||||
|
||||
bool busy = sam_gpioread(GPIO_TCS_BUSY);
|
||||
#if defined(CONFIG_DEBUG_INPUT) && defined(CONFIG_DEBUG_VERBOSE)
|
||||
if (busy != last)
|
||||
{
|
||||
ivdbg("busy:%d\n", busy);
|
||||
last = busy;
|
||||
}
|
||||
#endif
|
||||
|
||||
return busy;
|
||||
}
|
||||
|
||||
static bool tsc_pendown(FAR struct ads7843e_config_s *state)
|
||||
{
|
||||
/* The /PENIRQ value is active low */
|
||||
|
||||
bool pendown = !sam_gpioread(GPIO_TCS_IRQ);
|
||||
ivdbg("pendown:%d\n", pendown);
|
||||
return pendown;
|
||||
}
|
||||
|
||||
/****************************************************************************
|
||||
* Public Functions
|
||||
****************************************************************************/
|
||||
|
||||
/****************************************************************************
|
||||
* Name: arch_tcinitialize
|
||||
*
|
||||
* Description:
|
||||
* Each board that supports a touchscreen device must provide this function.
|
||||
* This function is called by application-specific, setup logic to
|
||||
* configure the touchscreen device. This function will register the driver
|
||||
* as /dev/inputN where N is the minor device number.
|
||||
*
|
||||
* Input Parameters:
|
||||
* minor - The input device minor number
|
||||
*
|
||||
* Returned Value:
|
||||
* Zero is returned on success. Otherwise, a negated errno value is
|
||||
* returned to indicate the nature of the failure.
|
||||
*
|
||||
****************************************************************************/
|
||||
|
||||
int arch_tcinitialize(int minor)
|
||||
{
|
||||
FAR struct spi_dev_s *dev;
|
||||
int ret;
|
||||
|
||||
idbg("minor %d\n", minor);
|
||||
DEBUGASSERT(minor == 0);
|
||||
|
||||
/* Configure and enable the ADS7843E interrupt pin as an input */
|
||||
|
||||
(void)sam_configgpio(GPIO_TCS_BUSY);
|
||||
(void)sam_configgpio(GPIO_TCS_IRQ);
|
||||
|
||||
/* Configure the PIO interrupt */
|
||||
|
||||
sam_gpioirq(GPIO_TCS_IRQ);
|
||||
|
||||
/* Get an instance of the SPI interface for the touchscreen chip select */
|
||||
|
||||
dev = up_spiinitialize(TSC_CSNUM);
|
||||
if (!dev)
|
||||
{
|
||||
idbg("Failed to initialize SPI chip select %d\n", TSC_CSNUM);
|
||||
return -ENODEV;
|
||||
}
|
||||
|
||||
/* Initialize and register the SPI touschscreen device */
|
||||
|
||||
ret = ads7843e_register(dev, &g_tscinfo, CONFIG_ADS7843E_DEVMINOR);
|
||||
if (ret < 0)
|
||||
{
|
||||
idbg("Failed to initialize SPI chip select %d\n", TSC_CSNUM);
|
||||
/* up_spiuninitialize(dev); */
|
||||
return -ENODEV;
|
||||
}
|
||||
|
||||
return OK;
|
||||
}
|
||||
|
||||
/****************************************************************************
|
||||
* Name: arch_tcuninitialize
|
||||
*
|
||||
* Description:
|
||||
* Each board that supports a touchscreen device must provide this function.
|
||||
* This function is called by application-specific, setup logic to
|
||||
* uninitialize the touchscreen device.
|
||||
*
|
||||
* Input Parameters:
|
||||
* None
|
||||
*
|
||||
* Returned Value:
|
||||
* None.
|
||||
*
|
||||
****************************************************************************/
|
||||
|
||||
void arch_tcuninitialize(void)
|
||||
{
|
||||
/* No support for un-initializing the touchscreen ADS7843E device yet */
|
||||
}
|
||||
|
||||
#endif /* CONFIG_INPUT && CONFIG_INPUT_ADS7843E */
|
||||
Loading…
Reference in New Issue
Block a user