Add support for the XPT2046 touchscreen controller on the Viewtool LCD module
This commit is contained in:
Gregory Nutt
parent
a36da96c3c
commit
4d8bbe350c
@ -28,7 +28,7 @@ Contents
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o USB Interface
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o microSD Card Interface
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o ViewTool DP83848 Ethernet Module
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o LCD Interface
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o LCD/Touchscreen Interface
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o Toolchains
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- NOTE about Windows native toolchains
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o Configurations
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@ -397,8 +397,8 @@ ViewTool DP83848 Ethernet Module
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(also FTP, TFTP, WGET, NFS, etc. if you also have a mass storage
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device).
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LCD Interface
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=============
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LCD/Touchscreen Interface
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=========================
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An LCD may be connected via J11. Only the the STM32F103 supports the FSMC signals
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needed to drive the LCD.
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@ -650,6 +650,53 @@ Configurations
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4. USB support is disabled by default. See the section above entitled,
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"USB Interface"
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5. This configuration has been used for verifying the touchscreen on
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on the Viewtool LCD module. NOTE: The LCD module can really only
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be used on the STM32F103 version of the board. The LCD requires
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FSMC support (the touchscreen, however, does not but the touchscreen
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is not very meaningful with no LCD).
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CONFIG_ARCH_CHIP_STM32F103VCT6=y : Select STM32F103VCT6
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With the following modifications, you can include the touchscreen
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test program at apps/examples/touchscreen as an NSH built-in
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application. You can enable the touchscreen and test by modifying
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the default 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 XPT2046
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CONFIG_ADS7843E_SPIDEV=2 : Use SPI2 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_STM32_SPI2=y : Enable support for SPI2
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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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Applicaton Configuration:
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CONFIG_EXAMPLES_TOUCHSCREEN=y : Enable the touchscreen built-int test
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Defaults should be okay for related touchscreen settings. Touchscreen
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debug output on USART1 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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highpri:
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This configuration was used to verify the NuttX high priority, nested
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@ -211,6 +211,8 @@ CONFIG_STM32_CONNECTIVITYLINE=y
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#
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# STM32 Peripheral Support
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#
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# CONFIG_STM32_HAVE_USBDEV is not set
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CONFIG_STM32_HAVE_OTGFS=y
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# CONFIG_STM32_ADC1 is not set
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# CONFIG_STM32_ADC2 is not set
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# CONFIG_STM32_ADC3 is not set
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@ -224,6 +226,7 @@ CONFIG_STM32_CONNECTIVITYLINE=y
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# CONFIG_STM32_ETHMAC is not set
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# CONFIG_STM32_I2C1 is not set
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# CONFIG_STM32_I2C2 is not set
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# CONFIG_STM32_OTGFS is not set
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CONFIG_STM32_PWR=y
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# CONFIG_STM32_SPI1 is not set
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# CONFIG_STM32_SPI2 is not set
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@ -241,7 +244,6 @@ CONFIG_STM32_USART1=y
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# CONFIG_STM32_USART3 is not set
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# CONFIG_STM32_UART4 is not set
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# CONFIG_STM32_UART5 is not set
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# CONFIG_STM32_USB is not set
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# CONFIG_STM32_IWDG is not set
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# CONFIG_STM32_WWDG is not set
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@ -667,16 +669,11 @@ CONFIG_EXAMPLES_NSH=y
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# Networking Utilities
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#
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# CONFIG_NETUTILS_CODECS is not set
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# CONFIG_NETUTILS_DHCPC is not set
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# CONFIG_NETUTILS_DHCPD is not set
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# CONFIG_NETUTILS_FTPC is not set
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# CONFIG_NETUTILS_FTPD is not set
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# CONFIG_NETUTILS_JSON is not set
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CONFIG_NETUTILS_RESOLV=y
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CONFIG_NET_RESOLV_ENTRIES=8
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CONFIG_NET_RESOLV_MAXRESPONSE=96
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# CONFIG_NETUTILS_SMTP is not set
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# CONFIG_NETUTILS_TELNETD is not set
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CONFIG_NETUTILS_TFTPC=y
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# CONFIG_NETUTILS_THTTPD is not set
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CONFIG_NETUTILS_UIPLIB=y
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@ -62,6 +62,10 @@ CSRCS += stm32_usbdev.c
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endif
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endif
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ifeq ($(CONFIG_INPUT_ADS7843E),y) # F103
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CSRCS += stm32_touchscreen.c
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endif
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ifeq ($(CONFIG_LCD_SSD1289),y) # F103
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CSRCS += stm32_ssd1289.c
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endif
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@ -87,7 +87,8 @@
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* Name: stm32_spiinitialize
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*
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* Description:
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* Called to configure SPI chip select GPIO pins for the Viewtools stm32f103/107 board.
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* Called to configure SPI chip select GPIO pins for the Viewtool stm32f103/107
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* board.
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*
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************************************************************************************/
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@ -98,6 +99,12 @@ void weak_function stm32_spiinitialize(void)
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* Here, we only initialize chip select pins unique to the board
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* architecture.
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*/
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#if defined(CONFIG_STM32_SPI2) && defined(CONFIG_INPUT_ADS7843E)
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/* Configure the XPT2046 SPI2 CS pin as an output */
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(void)stm32_configgpio(GPIO_LCDTP_CS);
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#endif
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}
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/****************************************************************************
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@ -141,6 +148,15 @@ uint8_t stm32_spi1status(FAR struct spi_dev_s *dev, enum spi_dev_e devid)
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void stm32_spi2select(FAR struct spi_dev_s *dev, enum spi_dev_e devid, bool selected)
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{
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spidbg("devid: %d CS: %s\n", (int)devid, selected ? "assert" : "de-assert");
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#ifdef CONFIG_INPUT_ADS7843E
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/* Select/de-select the touchscreen */
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if (devid == SPIDEV_TOUCHSCREEN)
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{
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stm32_gpiowrite(GPIO_LCDTP_CS, !selected);
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}
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#endif
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}
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uint8_t stm32_spi2status(FAR struct spi_dev_s *dev, enum spi_dev_e devid)
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@ -149,13 +165,13 @@ uint8_t stm32_spi2status(FAR struct spi_dev_s *dev, enum spi_dev_e devid)
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}
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#endif
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#ifdef CONFIG_STM32_SPI2
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void stm32_spi2select(FAR struct spi_dev_s *dev, enum spi_dev_e devid, bool selected)
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#ifdef CONFIG_STM32_SPI3
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void stm32_spi3select(FAR struct spi_dev_s *dev, enum spi_dev_e devid, bool selected)
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{
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spidbg("devid: %d CS: %s\n", (int)devid, selected ? "assert" : "de-assert");
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}
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uint8_t stm32_spi2status(FAR struct spi_dev_s *dev, enum spi_dev_e devid)
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uint8_t stm32_spi3status(FAR struct spi_dev_s *dev, enum spi_dev_e devid)
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{
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return 0;
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}
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325
configs/viewtool-stm32f107/src/stm32_touchscreen.c
Normal file
325
configs/viewtool-stm32f107/src/stm32_touchscreen.c
Normal file
@ -0,0 +1,325 @@
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/************************************************************************************
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* configs/viewtools-stm32f107/src/stm32_touchscreen.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 "up_arch.h"
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#include "stm32_gpio.h"
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#include "viewtool_stm32f107.h"
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#ifdef 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_STM32_SPI2
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# error CONFIG_STM32_SPI2 is required for touchscreen support
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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_DEVMINOR
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# define CONFIG_ADS7843E_DEVMINOR 0
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#endif
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/* The touchscreen communicates on SPI2 */
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#define TSC_DEVNUM 2
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/****************************************************************************
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* Private Types
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****************************************************************************/
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struct viewtool_tscinfo_s
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{
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/* Standard ADS7843/XTP2046 interface */
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struct ads7843e_config_s config;
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/* Extensions for the viewtool board */
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xcpt_t handler;
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};
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/****************************************************************************
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* Private 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 XPT2046 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 XPT2046 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 XPT2046
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* driver. This structure provides information about the configuration
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* of the XPT2046 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 writable because, under certain circumstances, the driver
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* may modify certain values.
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*/
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static struct viewtool_tscinfo_s g_tscinfo =
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{
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.config =
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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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/****************************************************************************
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* Private Functions
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****************************************************************************/
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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 XPT2046 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 XPT2046 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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****************************************************************************/
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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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FAR struct viewtool_tscinfo_s *priv = (FAR struct viewtool_tscinfo_s *)state;
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if (isr)
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{
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/* Just save the address of the handler for now. The new handler will
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* be attached when the interrupt is next enabled.
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*/
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ivdbg("Attaching %p\n", isr);
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priv->handler = isr;
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}
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else
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{
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ivdbg("Detaching %p\n", priv->handler);
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tsc_enable(state, false);
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priv->handler = NULL;
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}
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return OK;
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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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FAR struct viewtool_tscinfo_s *priv = (FAR struct viewtool_tscinfo_s *)state;
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irqstate_t flags;
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/* Attach and enable, or detach and disable. Enabling and disabling GPIO
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* interrupts is a multi-step process so the safest thing is to keep
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* interrupts disabled during the reconfiguration.
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*/
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flags = irqsave();
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if (enable && priv->handler)
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{
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/* Configure the EXTI interrupt using the SAVED handler */
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(void)stm32_gpiosetevent(GPIO_LCDTP_IRQ, true, true, true, priv->handler);
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}
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else
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{
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/* Configure the EXTI interrupt with a NULL handler to disable it */
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(void)stm32_gpiosetevent(GPIO_LCDTP_IRQ, false, false, false, NULL);
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}
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irqrestore(flags);
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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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return false; /* The BUSY signal is not connected */
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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 = !stm32_gpioread(GPIO_LCDTP_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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static bool initialized = false;
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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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/* Have we already initialized? Since we never uninitialize we must prevent
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* multiple initializations. This is necessary, for example, when the
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* touchscreen example is used as a built-in application in NSH and can be
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* called numerous time. It will attempt to initialize each time.
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*/
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if (!initialized)
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{
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/* Configure the XPT2046 interrupt pin as an input */
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(void)stm32_configgpio(GPIO_LCDTP_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_DEVNUM);
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if (!dev)
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{
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idbg("Failed to initialize SPI%d\n", TSC_DEVNUM);
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return -ENODEV;
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}
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/* Initialize and register the SPI touchscreen device */
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ret = ads7843e_register(dev, &g_tscinfo.config, CONFIG_ADS7843E_DEVMINOR);
|
||||
if (ret < 0)
|
||||
{
|
||||
idbg("Failed to register touchscreen device\n");
|
||||
/* up_spiuninitialize(dev); */
|
||||
return -ENODEV;
|
||||
}
|
||||
|
||||
/* Now we are initialized */
|
||||
|
||||
initialized = true;
|
||||
}
|
||||
|
||||
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 XPT2046 device. It will
|
||||
* continue to run and process touch interrupts in the background.
|
||||
*/
|
||||
}
|
||||
|
||||
#endif /* CONFIG_INPUT_ADS7843E */
|
||||
Loading…
Reference in New Issue
Block a user