SAM4E-EK: Add a touchscreen driver (untestd on initial checkin)
This commit is contained in:
Gregory Nutt
parent
6a943baa91
commit
296db40aeb
@ -70,15 +70,12 @@ choice
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config SAM4EEK_LCD_RGB565
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bool "RGB565"
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default n
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config SAM4EEK_LCD_RGB24
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bool "RGB24 / RGB888"
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default n
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config SAM4EEK_LCD_RGB32
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bool "RGB32"
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default n
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endchoice # ILI9325-based LCD Color Configuration
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@ -857,8 +857,8 @@ Touchscreen
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CONFIG_SPI_OWNBUS=y : Smaller code if this is the only SPI device
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CONFIG_INPUT=y : Enable support for input devices
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CONFIG_INPUT_ADS7843E=y : Enable support for the XPT2046
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CONFIG_ADS7843E_SPIDEV=2 : Use SPI CS 2 for communication
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CONFIG_INPUT_ADS7843E=y : Enable support for the ADS7843E
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CONFIG_ADS7843E_SPIDEV=0 : Use SPI CS 0 for communication
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CONFIG_ADS7843E_SPIMODE=0 : Use SPI mode 0
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CONFIG_ADS7843E_FREQUENCY=1000000 : SPI BAUD 1MHz
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CONFIG_ADS7843E_SWAPXY=y : If landscape orientation
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@ -889,9 +889,6 @@ Touchscreen
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CONFIG_DEBUG_VERBOSE=y : Enable verbose debug output
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CONFIG_DEBUG_INPUT=y : Enable debug output from input devices
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STATUS
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2014-3-27: As of this writing, the touchscreen is untested.
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ILI9325-Based LCD
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=================
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@ -1335,6 +1332,96 @@ Configurations
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slot. Support for the SD slot can be enabled following the
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instructions provided above in the paragraph entitled "HSMCI."
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11. This configuration has been used for verifying the touchscreen on
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on the SAM4E-EK LCD module.
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The NSH configuration can be used to verify the ADS7843E touchscreen on
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the SAM4E-EK LCD. With these modifications, you can include the touchscreen
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test program at apps/examples/touchscreen as an NSH built-in application.
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You can enable the touchscreen and test by modifying the default
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configuration in the following ways:
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Device Drivers
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CONFIG_SPI=y : Enable SPI support
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CONFIG_SPI_EXCHANGE=y : The exchange() method is supported
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CONFIG_SPI_OWNBUS=y : Smaller code if this is the only SPI device
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CONFIG_INPUT=y : Enable support for input devices
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CONFIG_INPUT_ADS7843E=y : Enable support for the ADS7843E
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CONFIG_ADS7843E_SPIDEV=0 : Use SPI CS 0 for communication
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CONFIG_ADS7843E_SPIMODE=0 : Use SPI mode 0
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CONFIG_ADS7843E_FREQUENCY=1000000 : SPI BAUD 1MHz
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CONFIG_ADS7843E_SWAPXY=y : If landscape orientation
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CONFIG_ADS7843E_THRESHX=51 : These will probably need to be tuned
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CONFIG_ADS7843E_THRESHY=39
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System Type -> Peripherals:
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CONFIG_SAM34_SPI0=y : Enable support for SPI
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System Type:
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CONFIG_SAM34_GPIO_IRQ=y : GPIO interrupt support
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CONFIG_SAM34_GPIOA_IRQ=y : Enable GPIO interrupts from port A
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RTOS Features:
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CONFIG_DISABLE_SIGNALS=n : Signals are required
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Library Support:
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CONFIG_SCHED_WORKQUEUE=y : Work queue support required
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Application Configuration:
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CONFIG_EXAMPLES_TOUCHSCREEN=y : Enable the touchscreen built-in test
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Defaults should be okay for related touchscreen settings. Touchscreen
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debug output on UART0 can be enabled with:
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Build Setup:
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CONFIG_DEBUG=y : Enable debug features
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CONFIG_DEBUG_VERBOSE=y : Enable verbose debug output
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CONFIG_DEBUG_INPUT=y : Enable debug output from input devices
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11. This configuration can be re-configured to test the on-board LCD
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module.
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System Type -> AT91SAM3/4 Configuration Options
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CONFIG_SAM34_SMC=y : SMC support
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Device Drivers -> LCD Driver Support
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CONFIG_LCD=y : Enable LCD support
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CONFIG_NX_LCDDRIVER=y : LCD graphics device
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CONFIG_LCD_MAXCONTRAST=1 : Value should not matter
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CONFIG_LCD_MAXPOWER=64 : Must be > 16
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CONFIG_LCD_LANDSCAPE=y : Landscape orientation
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Board Selection
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CONFIG_SAM4EEK_LCD_RGB565=y : Color resolution
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CONFIG_SAM4EEK_LCD_BGCOLOR=0x00 : Initial background color
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Graphics Support
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CONFIG_NX=y
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Graphics Support -> Supported Pixel Depths
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CONFIG_NX_DISABLE_1BPP=y : Only 16BPP supported
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CONFIG_NX_DISABLE_2BPP=y
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CONFIG_NX_DISABLE_4BPP=y
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CONFIG_NX_DISABLE_8BPP=y
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CONFIG_NX_DISABLE_24BPP=y
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CONFIG_NX_DISABLE_32BPP=y
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Graphics Support -> Font Selections
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CONFIG_NXFONTS_CHARBITS=7
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CONFIG_NXFONT_SANS22X29B=y
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CONFIG_NXFONT_SANS23X27=y
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Application Configuration -> Examples
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CONFIG_EXAMPLES_NXLINES=y
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CONFIG_EXAMPLES_NXLINES_BGCOLOR=0x0320
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CONFIG_EXAMPLES_NXLINES_LINEWIDTH=16
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CONFIG_EXAMPLES_NXLINES_LINECOLOR=0xffe0
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CONFIG_EXAMPLES_NXLINES_BORDERWIDTH=4
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CONFIG_EXAMPLES_NXLINES_BORDERCOLOR=0xffe0
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CONFIG_EXAMPLES_NXLINES_CIRCLECOLOR=0xf7bb
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CONFIG_EXAMPLES_NXLINES_BPP=16
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STATUS:
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2014-3-24: DMA is not currently functional and without DMA, there
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may not be reliable data transfers at high speeds due
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@ -46,10 +46,6 @@ ifeq ($(CONFIG_HAVE_CXXINITIALIZE),y)
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CSRCS += sam_cxxinitialize.c
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endif
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ifeq ($(CONFIG_SAM4EEK_ILI9325),y)
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CSRCS += sam_ili9325.c
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endif
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ifeq ($(CONFIG_NSH_ARCHINIT),y)
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CSRCS += sam_nsh.c
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endif
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@ -62,6 +58,10 @@ ifeq ($(CONFIG_LCD),y)
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CSRCS += sam_ili9325.c
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endif
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ifeq ($(CONFIG_INPUT_ADS7843E),y)
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CSRCS += sam_ads7843e.c
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endif
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ifeq ($(CONFIG_SAM34_SPI0),y)
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CSRCS += sam_spi.c
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ifeq ($(CONFIG_MTD_AT25),y)
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290
configs/sam4e-ek/src/sam_ads7843e.c
Normal file
290
configs/sam4e-ek/src/sam_ads7843e.c
Normal file
@ -0,0 +1,290 @@
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/************************************************************************************
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* configs/sam4e-ek/src/sam_ads7843e.c
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*
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* Copyright (C) 2014 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <gnutt@nuttx.org>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name NuttX nor the names of its contributors may be
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* used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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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 <stdbool.h>
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#include <stdio.h>
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#include <debug.h>
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#include <assert.h>
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#include <errno.h>
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#include <nuttx/spi/spi.h>
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#include <nuttx/input/touchscreen.h>
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#include <nuttx/input/ads7843e.h>
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#include "sam_gpio.h"
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#include "sam4e-ek.h"
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#if defined(CONFIG_INPUT) && defined(CONFIG_INPUT_ADS7843E)
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/****************************************************************************
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* Pre-Processor Definitions
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****************************************************************************/
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/* Configuration ************************************************************/
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#ifndef CONFIG_SAM34_SPI0
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# error "Touchscreen support requires CONFIG_SAM34_SPI0"
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#endif
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#ifndef CONFIG_SAM34_GPIOA_IRQ
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# error "Touchscreen support requires CONFIG_SAM34_GPIOA_IRQ"
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#endif
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#ifndef CONFIG_ADS7843E_FREQUENCY
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# define CONFIG_ADS7843E_FREQUENCY 500000
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#endif
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#ifndef CONFIG_ADS7843E_SPIDEV
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# define CONFIG_ADS7843E_SPIDEV TSC_CSNUM
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#endif
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#if CONFIG_ADS7843E_SPIDEV != TSC_CSNUM
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# error "CONFIG_ADS7843E_SPIDEV must have the same value as TSC_CSNUM"
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#endif
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#ifndef CONFIG_ADS7843E_DEVMINOR
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# define CONFIG_ADS7843E_DEVMINOR 0
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#endif
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/****************************************************************************
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* Static Function Prototypes
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****************************************************************************/
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/* IRQ/GPIO access callbacks. These operations all hidden behind
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* callbacks to isolate the ADS7843E driver from differences in GPIO
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* interrupt handling by varying boards and MCUs. If possible,
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* interrupts should be configured on both rising and falling edges
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* so that contact and loss-of-contact events can be detected.
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*
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* attach - Attach the ADS7843E interrupt handler to the GPIO interrupt
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* enable - Enable or disable the GPIO interrupt
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* clear - Acknowledge/clear any pending GPIO interrupt
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* pendown - Return the state of the pen down GPIO input
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*/
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static int tsc_attach(FAR struct ads7843e_config_s *state, xcpt_t isr);
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static void tsc_enable(FAR struct ads7843e_config_s *state, bool enable);
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static void tsc_clear(FAR struct ads7843e_config_s *state);
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static bool tsc_busy(FAR struct ads7843e_config_s *state);
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static bool tsc_pendown(FAR struct ads7843e_config_s *state);
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/****************************************************************************
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* Private Data
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****************************************************************************/
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/* A reference to a structure of this type must be passed to the ADS7843E
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* driver. This structure provides information about the configuration
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* of the ADS7843E and provides some board-specific hooks.
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*
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* Memory for this structure is provided by the caller. It is not copied
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* by the driver and is presumed to persist while the driver is active. The
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* memory must be writeable because, under certain circumstances, the driver
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* may modify frequency or X plate resistance values.
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*/
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static struct ads7843e_config_s g_tscinfo =
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{
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.frequency = CONFIG_ADS7843E_FREQUENCY,
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.attach = tsc_attach,
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.enable = tsc_enable,
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.clear = tsc_clear,
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.busy = tsc_busy,
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.pendown = tsc_pendown,
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};
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/****************************************************************************
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* Private Functions
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****************************************************************************/
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/* IRQ/GPIO access callbacks. These operations all hidden behind
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* callbacks to isolate the ADS7843E driver from differences in GPIO
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* interrupt handling by varying boards and MCUs. If possible,
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* interrupts should be configured on both rising and falling edges
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* so that contact and loss-of-contact events can be detected.
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*
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* attach - Attach the ADS7843E interrupt handler to the GPIO interrupt
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* enable - Enable or disable the GPIO interrupt
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* clear - Acknowledge/clear any pending GPIO interrupt
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* pendown - Return the state of the pen down GPIO input
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*/
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static int tsc_attach(FAR struct ads7843e_config_s *state, xcpt_t isr)
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{
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/* Attach the ADS7843E interrupt */
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ivdbg("Attaching %p to IRQ %d\n", isr, SAM_TCS_IRQ);
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return irq_attach(SAM_TCS_IRQ, isr);
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}
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static void tsc_enable(FAR struct ads7843e_config_s *state, bool enable)
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{
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/* Attach and enable, or detach and disable */
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ivdbg("IRQ:%d enable:%d\n", SAM_TCS_IRQ, enable);
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if (enable)
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{
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sam_gpioirqenable(SAM_TCS_IRQ);
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}
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else
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{
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sam_gpioirqdisable(SAM_TCS_IRQ);
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}
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}
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static void tsc_clear(FAR struct ads7843e_config_s *state)
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{
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/* Does nothing */
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}
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static bool tsc_busy(FAR struct ads7843e_config_s *state)
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{
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#if defined(CONFIG_DEBUG_INPUT) && defined(CONFIG_DEBUG_VERBOSE)
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static bool last = (bool)-1;
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#endif
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/* BUSY is high impedance when CS is high (not selected). When CS is
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* is low, BUSY is active high.
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*/
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bool busy = sam_gpioread(GPIO_TCS_BUSY);
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#if defined(CONFIG_DEBUG_INPUT) && defined(CONFIG_DEBUG_VERBOSE)
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if (busy != last)
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{
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ivdbg("busy:%d\n", busy);
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last = busy;
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}
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#endif
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return busy;
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}
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static bool tsc_pendown(FAR struct ads7843e_config_s *state)
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{
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/* The /PENIRQ value is active low */
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bool pendown = !sam_gpioread(GPIO_TCS_IRQ);
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ivdbg("pendown:%d\n", pendown);
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return pendown;
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}
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: arch_tcinitialize
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*
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* Description:
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* Each board that supports a touchscreen device must provide this function.
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* This function is called by application-specific, setup logic to
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* configure the touchscreen device. This function will register the driver
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* as /dev/inputN where N is the minor device number.
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*
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* Input Parameters:
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* minor - The input device minor number
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*
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* Returned Value:
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* Zero is returned on success. Otherwise, a negated errno value is
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* returned to indicate the nature of the failure.
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*
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****************************************************************************/
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int arch_tcinitialize(int minor)
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{
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FAR struct spi_dev_s *dev;
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int ret;
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idbg("minor %d\n", minor);
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DEBUGASSERT(minor == 0);
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/* Configure and enable the ADS7843E interrupt pin as an input */
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(void)sam_configgpio(GPIO_TCS_BUSY);
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(void)sam_configgpio(GPIO_TCS_IRQ);
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/* Configure the PIO interrupt */
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sam_gpioirq(GPIO_TCS_IRQ);
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/* Get an instance of the SPI interface for the touchscreen chip select */
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dev = up_spiinitialize(TSC_CSNUM);
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if (!dev)
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{
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idbg("Failed to initialize SPI chip select %d\n", TSC_CSNUM);
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return -ENODEV;
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}
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/* Initialize and register the SPI touschscreen device */
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ret = ads7843e_register(dev, &g_tscinfo, CONFIG_ADS7843E_DEVMINOR);
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if (ret < 0)
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{
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idbg("Failed to initialize SPI chip select %d\n", TSC_CSNUM);
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/* up_spiuninitialize(dev); */
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return -ENODEV;
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}
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return OK;
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}
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/****************************************************************************
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* Name: arch_tcuninitialize
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*
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* Description:
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* Each board that supports a touchscreen device must provide this function.
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* This function is called by application-specific, setup logic to
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* uninitialize the touchscreen device.
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*
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* Input Parameters:
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* None
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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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void arch_tcuninitialize(void)
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{
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/* No support for un-initializing the touchscreen ADS7843E device yet */
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}
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#endif /* CONFIG_INPUT && CONFIG_INPUT_ADS7843E */
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