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incubator-nuttx/include/nuttx/input/stmpe811.h

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/********************************************************************************************
* include/nuttx/input/stmpe811.h
*
* Copyright (C) 2012 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <gnutt@nuttx.org>
*
* References:
* "STMPE811 S-Touch® advanced resistive touchscreen controller with 8-bit
* GPIO expander," Doc ID 14489 Rev 6, CD00186725, STMicroelectronics"
*
* 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.
*
********************************************************************************************/
#ifndef __INCLUDE_NUTTX_INPUT_STMPE811_H
#define __INCLUDE_NUTTX_INPUT_STMPE811_H
/********************************************************************************************
* Included Files
********************************************************************************************/
#include <nuttx/config.h>
#include <nuttx/i2c.h>
#include <nuttx/spi.h>
#include <nuttx/irq.h>
#if defined(CONFIG_INPUT) && defined(CONFIG_INPUT_STMPE811)
/********************************************************************************************
* Pre-Processor Definitions
********************************************************************************************/
/* Configuration ****************************************************************************/
/* Prerequisites: CONFIG_INPUT=y
* Other settings that effect the driver: CONFIG_DISABLE_POLL
*
* CONFIG_INPUT_STMPE811
* Enables support for the STMPE811 driver (Needs CONFIG_INPUT)
* CONFIG_STMPE811_SPI
* Enables support for the SPI interface (not currenly supported)
* CONFIG_STMPE811_I2C
* Enables support for the I2C interface
* CONFIG_STMPE811_MULTIPLE
* Can be defined to support multiple STMPE811 devices on board.
* CONFIG_STMPE811_NPOLLWAITERS
* Maximum number of threads that can be waiting on poll() (ignored if
* CONFIG_DISABLE_POLL is set).
* CONFIG_STMPE811_TSC_DISABLE
* Disable driver touchscreen functionality.
* CONFIG_STMPE811_ADC_DISABLE
* Disable driver ADC functionality.
* CONFIG_STMPE811_GPIO_DISABLE
* Disable driver GPIO functionality.
* CONFIG_STMPE811_GPIOINT_DISABLE
* Disable driver GPIO interrupt functionlality (ignored if GPIO functionality is
* disabled).
* CONFIG_STMPE811_SWAPXY
* Reverse the meaning of X and Y to handle different LCD orientations.
* CONFIG_STMPE811_TEMP_DISABLE
* Disable driver temperature sensor functionality.
* CONFIG_STMPE811_REGDEBUG
* Enable very low register-level debug output. Requires CONFIG_DEBUG.
* CONFIG_STMPE811_THRESHX and CONFIG_STMPE811_THRESHY
* STMPE811 touchscreen data comes in a a very high rate. New touch positions
* will only be reported when the X or Y data changes by these thresholds.
* This trades reduces data rate for some loss in dragging accuracy. The
* STMPE811 is configure for 12-bit values so the raw ranges are 0-4095. So
* for example, if your display is 320x240, then THRESHX=13 and THRESHY=17
* would correspond to one pixel. Default: 12
*/
/* The STMPE811 interfaces with the target CPU via a I2C or SPI interface. The pin IN_1
* allows the selection of interface protocol at reset state.
*/
#if !defined(CONFIG_STMPE811_SPI) && !defined(CONFIG_STMPE811_I2C)
# error "One of CONFIG_STMPE811_SPI or CONFIG_STMPE811_I2C must be defined"
#endif
#if defined(CONFIG_STMPE811_SPI) && defined(CONFIG_STMPE811_I2C)
# error "Only one of CONFIG_STMPE811_SPI or CONFIG_STMPE811_I2C can be defined"
#endif
/* Maximum number of threads than can be waiting for POLL events */
#ifndef CONFIG_STMPE811_NPOLLWAITERS
# define CONFIG_STMPE811_NPOLLWAITERS 2
#endif
/* Check for some required settings. This can save the user a lot of time
* in getting the right configuration.
*/
#ifdef CONFIG_STMPE811_I2C
# ifndef CONFIG_I2C
# error "CONFIG_I2C is required in the I2C support"
# endif
# ifndef CONFIG_I2C_TRANSFER
# error "CONFIG_I2C_TRANSFER is required in the I2C configuration"
# endif
#endif
#ifdef CONFIG_DISABLE_SIGNALS
# error "Signals are required. CONFIG_DISABLE_SIGNALS must not be selected."
#endif
#ifndef CONFIG_SCHED_WORKQUEUE
# error "Work queue support required. CONFIG_SCHED_WORKQUEUE must be selected."
#endif
/* Thresholds */
#ifndef CONFIG_STMPE811_THRESHX
# define CONFIG_STMPE811_THRESHX 12
#endif
#ifndef CONFIG_STMPE811_THRESHY
# define CONFIG_STMPE811_THRESHY 12
#endif
/* Debug output */
#ifndef CONFIG_DEBUG
# undef CONFIG_STMPE811_REGDEBUG
#endif
/* I2C **************************************************************************************/
/* STMPE811 Address: The STMPE811 may have 7-bit address 0x41 or 0x44, depending upon the
* state of the ADDR0 pin.
*/
#define STMPE811_I2C_ADDRESS_MASK (0x78) /* Bits 3-7: Invariant part of STMPE811 address */
#define STMPE811_I2C_ADDRESS (0x40) /* Bits 3-7: Always set at '0100 0xxR' */
#define STMPE811_I2C_A1 (1 << 2) /* Bit 2: A1 */
#define STMPE811_I2C_A0 (1 << 1) /* Bit 1: A0 */
#define STMPE811_I2C_READ (1 << 0) /* Bit 0=1: Selects read operation */
#define STMPE811_I2C_WRITE (0) /* Bit 0=0: Selects write operation */
/* I2C frequency */
#define STMPE811_I2C_MAXFREQUENCY 400000 /* 400KHz */
/* SPI **************************************************************************************/
/* The device always operates in mode 0 */
#define STMPE811_SPI_MODE SPIDEV_MODE0 /* Mode 0 */
/* I2C frequency */
#define STMPE811_SPI_MAXFREQUENCY 1000000 /* 1MHz */
/* STMPE811 Registers ************************************************************************/
/* Register Addresses */
#define STMPE811_CHIP_ID 0x00 /* Device identification (16-bit) */
#define STMPE811_ID_VER 0x02 /* Revision number: 0x01=sample 0x03=final silicon */
#define STMPE811_SYS_CTRL1 0x03 /* Reset control */
#define STMPE811_SYS_CTRL2 0x04 /* Clock control */
#define STMPE811_SPI_CFG 0x08 /* SPI interface configuration */
#define STMPE811_INT_CTRL 0x09 /* Interrupt control register */
#define STMPE811_INT_EN 0x0a /* Interrupt enable register */
#define STMPE811_INT_STA 0x0b /* Interrupt status register */
#define STMPE811_GPIO_EN 0x0c /* GPIO interrupt enable register */
#define STMPE811_GPIO_INTSTA 0x0d /* GPIO interrupt status register */
#define STMPE811_ADC_INTEN 0x0e /* ADC interrupt enable register */
#define STMPE811_ADC_INTSTA 0x0f /* ADC interrupt status register */
#define STMPE811_GPIO_SETPIN 0x10 /* GPIO set pin register */
#define STMPE811_GPIO_CLRPIN 0x11 /* GPIO clear pin register */
#define STMPE811_GPIO_MPSTA 0x12 /* GPIO monitor pin state register */
#define STMPE811_GPIO_DIR 0x13 /* GPIO direction register */
#define STMPE811_GPIO_ED 0x14 /* GPIO edge detect register */
#define STMPE811_GPIO_RE 0x15 /* GPIO rising edge register */
#define STMPE811_GPIO_FE 0x16 /* GPIO falling edge register */
#define STMPE811_GPIO_AF 0x17 /* Alternate function register */
#define STMPE811_ADC_CTRL1 0x20 /* ADC control */
#define STMPE811_ADC_CTRL2 0x21 /* ADC control */
#define STMPE811_ADC_CAPT 0x22 /* To initiate ADC data acquisition */
#define STMPE811_ADC_DATACH(n) (0x30 + ((n) << 1)) /* ADC channel n (16-bit) */
#define STMPE811_ADC_DATACH0 0x30 /* ADC channel 0 (16-bit) */
#define STMPE811_ADC_DATACH1 0x32 /* ADC channel 1 (16_bit) */
#define STMPE811_ADC_DATACH2 0x34 /* ADC channel 2 (16-bit) */
#define STMPE811_ADC_DATACH3 0x36 /* ADC channel 3 (16-bit) */
#define STMPE811_ADC_DATACH4 0x38 /* ADC channel 4 (16-bit) */
#define STMPE811_ADC_DATACH5 0x3a /* ADC channel 5 (16-bit) */
#define STMPE811_ADC_DATACH6 0x3c /* ADC channel 6 (16-bit) */
#define STMPE811_ADC_DATACH7 0x3e /* ADC channel 7 (16-bit) */
#define STMPE811_TSC_CTRL 0x40 /* 4-wire touchscreen controller setup */
#define STMPE811_TSC_CFG 0x41 /* Touchscreen controller configuration */
#define STMPE811_WDW_TRX 0x42 /* Window setup for top right X (16-bit) */
#define STMPE811_WDW_TRY 0x44 /* Window setup for top right Y (16-bit) */
#define STMPE811_WDW_BLX 0x46 /* Window setup for bottom left X (16-bit) */
#define STMPE811_WDW_BLY 0x48 /* Window setup for bottom left Y (16-bit) */
#define STMPE811_FIFO_TH 0x4a /* FIFO level to generate interrupt */
#define STMPE811_FIFO_STA 0x4b /* Current status of FIFO */
#define STMPE811_FIFO_SIZE 0x4c /* Current filled level of FIFO */
#define STMPE811_TSC_DATAX 0x4d /* Data port for touchscreen (16-bit) */
#define STMPE811_TSC_DATAY 0x4f /* Data port for touchscreen (16-bit) */
#define STMPE811_TSC_DATAZ 0x51 /* Data port for touchscreen */
#define STMPE811_TSC_DATAXYZ 0x52 /* Data port for touchscreen (32-bit) */
#define STMPE811_TSC_FRACTIONZ 0x56 /* Touchscreen controller FRACTION_Z */
#define STMPE811_TSC_DATA 0x57 /* Data port for touchscreen */
#define STMPE811_TSC_IDRIVE 0x58 /* Touchscreen controller drive I */
#define STMPE811_TSC_SHIELD 0x59 /* Touchscreen controller shield */
#define STMPE811_TEMP_CTRL 0x60 /* Temperature sensor setup */
#define STMPE811_TEMP_DATA 0x61 /* Temperature data access port */
#define STMPE811_TEMP_TH 0x62 /* Threshold for temperature controlled interrupt */
/* Register bit definitions */
/* Device identification (16-bit) */
#define CHIP_ID 0x0811
/* Revision number: 0x01=sample 0x03=final silicon */
#define ID_VER_SAMPLE 0x01
#define ID_VER_FINAL 0x03
/* Reset control */
#define SYS_CTRL1_HIBERNATE (1 << 0) /* Bit 0: Force the device into hibernation mode */
#define SYS_CTRL1_SOFTRESET (1 << 1) /* Bit 1: Reset the STMPE811 */
/* Clock control */
#define SYS_CTRL2_ADC_OFF (1 << 0) /* Bit 0: Switch off clock to ADC */
#define SYS_CTRL2_TSC_OFF (1 << 1) /* Bit 1: Switch off clock to touchscreen controller */
#define SYS_CTRL2_GPIO_OFF (1 << 2) /* Bit 2: Switch off clock to GPIO */
#define SYS_CTRL2_TS_OFF (1 << 3) /* Bit 3: Switch off clock to temperature sensor */
/* SPI interface configuration */
#define SPI_CFG_SPI_CLK_MOD0 (1 << 0) /* Bit 0: Value of SCAD/A0 pin at power-up reset */
#define SPI_CFG_SPI_CLK_MOD1 (1 << 1) /* Bit 1: Value of SCAD/A0 pin at power-up reset */
#define SPI_CFG_AUTO_INCR (1 << 2) /* Bit 2: Enable internally autoincremented addressing */
/* Interrupt control register */
#define INT_CTRL_GLOBAL_INT (1 << 0) /* Bit 0: Master interrupt enable */
#define INT_CTRL_INT_TYPE (1 << 1) /* Bit 1: Type of interrupt signal. 1=edge */
#define INT_CTRL_INT_POLARITY (1 << 2) /* Bit 2: Interrupt pin polarity. 1=active high */
/* Interrupt enable/status register */
#define INT_TOUCH_DET (1 << 0) /* Bit 0: Touch is detected */
#define INT_FIFO_TH (1 << 1) /* Bit 1: FIFO is equal or above threshold value */
#define INT_FIFO_OFLOW (1 << 2) /* Bit 2: FIFO is overflowed */
#define INT_FIFO_FULL (1 << 3) /* Bit 3: FIFO is full */
#define INT_FIFO_EMPTY (1 << 4) /* Bit 4: FIFO is empty */
#define INT_TEMP_SENS (1 << 5) /* Bit 5: Temperature threshold triggering */
#define INT_ADC (1 << 6) /* Bit 6: Any enabled ADC interrupts */
#define INT_GPIO (1 << 7) /* Bit 7: Any enabled GPIO interrupts */
#define INT_ALL 0xff
/* GPIO interrupt enable/status register */
#define GPIO_INT(n) (1 << (n))
/* ADC interrupt enable/status register */
#define ADC_INT(n) (1 << (n))
/* GPIO set/clear/sta/dir/edge/rising/falling/af registers */
#define GPIO_PIN(n) (1 << (n))
#define TSC_PIN_SET (0xf0) /* Pins 4-7: Used by touchscreen */
/* ADC control */
#define ADC_CTRL1_REF_SEL (1 << 1) /* Bit 1: Selects internal/external, 1=external */
#define ADC_CTRL1_MOD_12B (1 << 3) /* Bit 3: Selects 10/12-bit ADC operation, 1=12-bit */
#define ADC_CTRL1_SAMPLE_TIME_SHIFT (4) /* Bits 4-6: ADC conversion time in number of clock */
#define ADC_CTRL1_SAMPLE_TIME_MASK (7 << ADC_CTRL1_SAMPLE_TIME_SHIFT)
# define ADC_CTRL1_SAMPLE_TIME_36 (0 << ADC_CTRL1_SAMPLE_TIME_SHIFT)
# define ADC_CTRL1_SAMPLE_TIME_44 (1 << ADC_CTRL1_SAMPLE_TIME_SHIFT)
# define ADC_CTRL1_SAMPLE_TIME_56 (2 << ADC_CTRL1_SAMPLE_TIME_SHIFT)
# define ADC_CTRL1_SAMPLE_TIME_64 (3 << ADC_CTRL1_SAMPLE_TIME_SHIFT)
# define ADC_CTRL1_SAMPLE_TIME_80 (4 << ADC_CTRL1_SAMPLE_TIME_SHIFT)
# define ADC_CTRL1_SAMPLE_TIME_96 (5 << ADC_CTRL1_SAMPLE_TIME_SHIFT)
# define ADC_CTRL1_SAMPLE_TIME_124 (6 << ADC_CTRL1_SAMPLE_TIME_SHIFT)
/* ADC control */
#define ADC_CTRL2_ADC_FREQ_SHIFT (0) /* Bits 0-1: Selects the clock speed of ADC */
#define ADC_CTRL2_ADC_FREQ_MASK (3 << ADC_CTRL2_ADC_FREQ_SHIFT)
# define ADC_CTRL2_ADC_FREQ_1p625 (0 << ADC_CTRL2_ADC_FREQ_SHIFT) /* 00: 1.625 MHz typ. */
# define ADC_CTRL2_ADC_FREQ_3p25 (1 << ADC_CTRL2_ADC_FREQ_SHIFT) /* 01: 3.25 MHz typ. */
# define ADC_CTRL2_ADC_FREQ_6.5 (2 << ADC_CTRL2_ADC_FREQ_SHIFT) /* 1x: 6.5 MHz typ. */
/* To initiate ADC data acquisition */
#define ADC_CAPT_CH(n) (1 << (n))
/* 4-wire touchscreen controller setup */
#define TSC_CTRL_EN (1 << 0) /* Bit 0: Enable TSC */
#define TSC_CTRL_OP_MOD_SHIFT (1) /* Bits 1-3: TSC operating mode */
#define TSC_CTRL_OP_MOD_MASK (7 << TSC_CTRL_OP_MOD_SHIFT)
# define TSC_CTRL_OP_MOD_XYZ (0 << TSC_CTRL_OP_MOD_SHIFT) /* 000: X, Y, Z acquisition */
# define TSC_CTRL_OP_MOD_XY (1 << TSC_CTRL_OP_MOD_SHIFT) /* 001: X, Y only */
# define TSC_CTRL_OP_MOD_X (2 << TSC_CTRL_OP_MOD_SHIFT) /* 010: X only */
# define TSC_CTRL_OP_MOD_Y (3 << TSC_CTRL_OP_MOD_SHIFT) /* 011: Y only */
# define TSC_CTRL_OP_MOD_Z (4 << TSC_CTRL_OP_MOD_SHIFT) /* 100: Z only */
#define TSC_CTRL_TRACK_SHIFT (4) /* Bits 4-6: Tracking index */
#define TSC_CTRL_TRACK_MASK (7 << TSC_CTRL_TRACK_SHIFT)
#define TSC_CTRL_TRACK_NONE (0 << TSC_CTRL_TRACK_SHIFT)
#define TSC_CTRL_TRACK_4 (1 << TSC_CTRL_TRACK_SHIFT)
#define TSC_CTRL_TRACK_8 (2 << TSC_CTRL_TRACK_SHIFT)
#define TSC_CTRL_TRACK_16 (3 << TSC_CTRL_TRACK_SHIFT)
#define TSC_CTRL_TRACK_32 (4 << TSC_CTRL_TRACK_SHIFT)
#define TSC_CTRL_TRACK_64 (5 << TSC_CTRL_TRACK_SHIFT)
#define TSC_CTRL_TRACK_92 (6 << TSC_CTRL_TRACK_SHIFT)
#define TSC_CTRL_TRACK_127 (7 << TSC_CTRL_TRACK_SHIFT)
#define TSC_CTRL_TSC_STA (1 << 7) /* Bit 7: TSC status. 1=touch detected */
/* Touchscreen controller configuration */
#define TSC_CFG_SETTLING_SHIFT (0) /* Bits 0-2: Panel driver settling time */
#define TSC_CFG_SETTLING_MASK (7 << TSC_CFG_SETTLING_SHIFT)
# define TSC_CFG_SETTLING_10US (0 << TSC_CFG_SETTLING_SHIFT)
# define TSC_CFG_SETTLING_100US (1 << TSC_CFG_SETTLING_SHIFT)
# define TSC_CFG_SETTLING_500US (2 << TSC_CFG_SETTLING_SHIFT)
# define TSC_CFG_SETTLING_1MS (3 << TSC_CFG_SETTLING_SHIFT)
# define TSC_CFG_SETTLING_5MS (4 << TSC_CFG_SETTLING_SHIFT)
# define TSC_CFG_SETTLING_10MS (5 << TSC_CFG_SETTLING_SHIFT)
# define TSC_CFG_SETTLING_50MS (6 << TSC_CFG_SETTLING_SHIFT)
# define TSC_CFG_SETTLING_100MS (7 << TSC_CFG_SETTLING_SHIFT)
#define TSC_CFG_TOUCH_DELAY_SHIFT (3) /* Bits 3-5: Touch detect delay */
#define TSC_CFG_TOUCH_DELAY_MASK (7 << TSC_CFG_TOUCH_DELAY_SHIFT)
# define TSC_CFG_TOUCH_DELAY_10US (0 << TSC_CFG_TOUCH_DELAY_SHIFT)
# define TSC_CFG_TOUCH_DELAY_50US (1 << TSC_CFG_TOUCH_DELAY_SHIFT)
# define TSC_CFG_TOUCH_DELAY_100US (2 << TSC_CFG_TOUCH_DELAY_SHIFT)
# define TSC_CFG_TOUCH_DELAY_500US (3 << TSC_CFG_TOUCH_DELAY_SHIFT)
# define TSC_CFG_TOUCH_DELAY_1MS (4 << TSC_CFG_TOUCH_DELAY_SHIFT)
# define TSC_CFG_TOUCH_DELAY_5MS (5 << TSC_CFG_TOUCH_DELAY_SHIFT)
# define TSC_CFG_TOUCH_DELAY_10MS (6 << TSC_CFG_TOUCH_DELAY_SHIFT)
# define TSC_CFG_TOUCH_DELAY_50MS (7 << TSC_CFG_TOUCH_DELAY_SHIFT)
#define TSC_CFG_AVE_CTRL_SHIFT (6) /* Bits 6-7: Average control */
#define TSC_CFG_AVE_CTRL_MASK (3 << TSC_CFG_AVE_CTRL_SHIFT)
# define TSC_CFG_AVE_CTRL_1SAMPLE (0 << TSC_CFG_AVE_CTRL_SHIFT)
# define TSC_CFG_AVE_CTRL_2SAMPLES (1 << TSC_CFG_AVE_CTRL_SHIFT)
# define TSC_CFG_AVE_CTRL_4SAMPLES (2 << TSC_CFG_AVE_CTRL_SHIFT)
# define TSC_CFG_AVE_CTRL_8SAMPLES (3 << TSC_CFG_AVE_CTRL_SHIFT)
/* Current status of FIFO */
#define FIFO_STA_FIFO_RESET (1 << 0) /* Bit 0: Resets FIFO. All data in FIFO are cleared */
#define FIFO_STA_FIFO_TH_TRIG (1 << 4) /* Bit 0: 1 = FIFO size is at or beyond threshold */
#define FIFO_STA_FIFO_EMPTY (1 << 5) /* Bit 0: FIFO is empty */
#define FIFO_STA_FIFO_FULL (1 << 6) /* Bit 0: FIFO is full */
#define FIFO_STA_FIFO_OFLOW (1 << 7) /* Bit 0: FIFO is overflow */
/* Touchscreen controller FRACTION_Z */
#define TSC_FRACTIONZ_MASK 0x07
/* Touchscreen controller drive I */
#define TSC_IDRIVE (1 << 0) /* Bit 0: MAX current on TSC driving channel */
# define TSC_IDRIVE_20MA (0) /* 20mA typical, 35mA max */
# define TSC_IDRIVE_50MA (1 << 0) /* 50mA typical, 80mA max */
/* Touchscreen controller shield */
#define TSC_SHIELD_YM (1 << 0) /* Bit 0: Ground Y- */
#define TSC_SHIELD_YP (1 << 1) /* Bit 1: Ground Y+ */
#define TSC_SHIELD_XM (1 << 2) /* Bit 2: Ground X- */
#define TSC_SHIELD_XP (1 << 3) /* Bit 3: Ground X+ */
/* Temperature sensor setup */
#define TEMP_CTRL_ENABLE (1 << 0) /* Bit 0: Enable */
#define TEMP_CTRL_ACQ (1 << 1) /* Bit 1: Acquire */
#define TEMP_CTRL_ACQ_MOD (1 << 2) /* Bit 2: 0=once, 1=every 10MS */
#define TEMP_CTRL_THRES_EN (1 << 3) /* Bit 3: Threshold enable */
#define TEMP_CTRL_THRES_RANGE (1 << 4) /* Bit 4: temperature threshold enable, 0='>=' 1='<' */
/* GPIO Configuration ***********************************************************************/
/* The STMPE811 GPIO interfaces take an 8-bit bit-encoded parameter to describe the GPIO pin.
* The following definitions describe the bit-encoding of that parameter.
*
* 7654 3210
* ---- ----
* DIRF VPPP
*
* Input Pins: 1IRF .PPP
*
* Output Pins: 0... VPPP
*
* Bits 7 is the pin direction.
*/
#define STMPE811_GPIO_DIR (1 << 7) /* Bit7: Direction bit */
#define STMPE811_GPIO_INPUT (1 << 7) /* Input pin (possibly interrupting) */
#define STMPE811_GPIO_OUTPUT (0) /* Configure as in output */
/* Bit 6 indicates that the pin will generate an interrupt (inputs only) */
#define STMPE811_GPIO_IN (1 << 6) /* Bit 6: Input interrupting pin */
/* The bits 4-5 select the rising and/or the falling edge detection. */
#define STMPE811_GPIO_RISING (1 << 5) /* Bit 5: Input interrupting pin */
#define STMPE811_GPIO_FALLING (1 << 4) /* Bit 4: Input interrupting pin */
/* Bit 3 is the initial value for output pins */
#define STMPE811_GPIO_VALUE (1 << 3) /* Bit 3: The initial value of an output pin */
# define STMPE811_GPIO_ONE (1 << 3) /* Bit 3: The initial value is logic 1 */
# define STMPE811_GPIO_ZERO (0) /* Bit 3: The initial value is logic 0 */
/* Bits 0-2 is the pin number */
#define STMPE811_GPIO_PIN_SHIFT (0)
#define STMPE811_GPIO_PIN_MASK (7 << STMPE811_GPIO_PIN_SHIFT)
# define STMPE811_GPIO_PIN0 (0 << STMPE811_GPIO_PIN_SHIFT)
# define STMPE811_GPIO_PIN1 (1 << STMPE811_GPIO_PIN_SHIFT)
# define STMPE811_GPIO_PIN2 (2 << STMPE811_GPIO_PIN_SHIFT)
# define STMPE811_GPIO_PIN3 (3 << STMPE811_GPIO_PIN_SHIFT)
# define STMPE811_GPIO_PIN4 (4 << STMPE811_GPIO_PIN_SHIFT)
# define STMPE811_GPIO_PIN5 (5 << STMPE811_GPIO_PIN_SHIFT)
# define STMPE811_GPIO_PIN6 (6 << STMPE811_GPIO_PIN_SHIFT)
# define STMPE811_GPIO_PIN7 (7 << STMPE811_GPIO_PIN_SHIFT)
/********************************************************************************************
* Public Types
********************************************************************************************/
/* Form of the GPIO "interrupt handler" callback. Callbacks do not occur from an interrupt
* handler but rather from the context of the worker thread with interrupts enabled.
*/
typedef void (*stmpe811_handler_t)(int pin);
/* A reference to a structure of this type must be passed to the STMPE811 driver when the
* driver is instantiaed. This structure provides information about the configuration of the
* STMPE811 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 writable
* because, under certain circumstances, the driver may modify the frequency.
*/
struct stmpe811_config_s
{
/* Device characterization */
#ifdef CONFIG_STMPE811_I2C
uint8_t address; /* 7-bit I2C address (only bits 0-6 used) */
#endif
uint32_t frequency; /* I2C or SPI frequency */
/* If multiple STMPE811 devices are supported, then an IRQ number must
* be provided for each so that their interrupts can be distinguished.
*/
#ifdef CONFIG_STMPE811_MULTIPLE
int irq; /* IRQ number received by interrupt handler. */
#endif
/* These are the timing valuses for ADC CTRL1 and CTRL2. These values
* are only used if either the TSC or the ADC are enabled. These values
* determine the characteristics of sampling.
*/
#if !defined(CONFIG_STMPE811_ADC_DISABLE) || !defined(CONFIG_STMPE811_TSC_DISABLE)
uint8_t ctrl1; /* Initialization value for ADC CTRL1 */
uint8_t ctrl2; /* Initialization value for ADC CTRL1 */
#endif
/* IRQ/GPIO access callbacks. These operations all hidden behind
* callbacks to isolate the STMPE811 driver from differences in GPIO
* interrupt handling by varying boards and MCUs.
*
* attach - Attach the STMPE811 interrupt handler to the GPIO interrupt
* enable - Enable or disable the GPIO interrupt
* clear - Acknowledge/clear any pending GPIO interrupt
*/
int (*attach)(FAR struct stmpe811_config_s *state, xcpt_t isr);
void (*enable)(FAR struct stmpe811_config_s *state, bool enable);
void (*clear)(FAR struct stmpe811_config_s *state);
};
/* Since the STMPE811 is a multi-function device, no functionality is assumed when the device
* is first created. Rather, a multi-step initialization is required. When
* stmpe811_instantiate is called, it returns a handle of the following type. That handle may
* then be used to enable a configure the STMPE811 functionality.
*/
typedef FAR void *STMPE811_HANDLE;
/********************************************************************************************
* Public Function Prototypes
********************************************************************************************/
#ifdef __cplusplus
#define EXTERN extern "C"
extern "C" {
#else
#define EXTERN extern
#endif
/********************************************************************************************
* Name: stmpe811_instantiate
*
* Description:
* Instantiate and configure the STMPE811 device driver to use the provided I2C or SPI
* device instance.
*
* Input Parameters:
* dev - An I2C or SPI driver instance
* config - Persistant board configuration data
*
* Returned Value:
* A non-zero handle is returned on success. This handle may then be used to configure
* the STMPE811 driver as necessary. A NULL handle value is returned on failure.
*
********************************************************************************************/
#ifdef CONFIG_STMPE811_SPI
EXTERN STMPE811_HANDLE stmpe811_instantiate(FAR struct spi_dev_s *dev,
FAR struct stmpe811_config_s *config);
#else
EXTERN STMPE811_HANDLE stmpe811_instantiate(FAR struct i2c_dev_s *dev,
FAR struct stmpe811_config_s *config);
#endif
/********************************************************************************************
* Name: stmpe811_register
*
* Description:
* Enable TSC functionality. GPIO4-7 must be available. This function will register the
* touchsceen driver as /dev/inputN where N is the minor device number
*
* Input Parameters:
* handle - The handle previously returned by stmpe811_instantiate
* 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.
*
********************************************************************************************/
#ifndef CONFIG_STMPE811_TSC_DISABLE
EXTERN int stmpe811_register(STMPE811_HANDLE handle, int minor);
#endif
/********************************************************************************************
* Name: stmpe811_gpioconfig
*
* Description:
* Configure an STMPE811 GPIO pin
*
* Input Parameters:
* handle - The handle previously returned by stmpe811_instantiate
* pinconfig - Bit-encoded pin configuration
*
* Returned Value:
* Zero is returned on success. Otherwise, a negated errno value is returned to indicate
* the nature of the failure.
*
********************************************************************************************/
#ifndef CONFIG_STMPE811_GPIO_DISABLE
EXTERN int stmpe811_gpioconfig(STMPE811_HANDLE handle, uint8_t pinconfig);
#endif
/********************************************************************************************
* Name: stmpe811_gpiowrite
*
* Description:
* Set or clear the GPIO output
*
* Input Parameters:
* handle - The handle previously returned by stmpe811_instantiate
* pinconfig - Bit-encoded pin configuration
* value = true: write logic '1'; false: write logic '0;
*
* Returned Value:
* None
*
********************************************************************************************/
#ifndef CONFIG_STMPE811_GPIO_DISABLE
EXTERN void stmpe811_gpiowrite(STMPE811_HANDLE handle, uint8_t pinconfig, bool value);
#endif
/********************************************************************************************
* Name: stmpe811_gpioread
*
* Description:
* Set or clear the GPIO output
*
* Input Parameters:
* handle - The handle previously returned by stmpe811_instantiate
* pinconfig - Bit-encoded pin configuration
* value - The location to return the state of the GPIO pin
*
* Returned Value:
* Zero is returned on success. Otherwise, a negated errno value is returned to indicate
* the nature of the failure.
*
********************************************************************************************/
#ifndef CONFIG_STMPE811_GPIO_DISABLE
EXTERN int stmpe811_gpioread(STMPE811_HANDLE handle, uint8_t pinconfig, bool *value);
#endif
/********************************************************************************************
* Name: stmpe811_gpioattach
*
* Description:
* Attach to a GPIO interrupt input pin and enable interrupts on the pin. Using the value
* NULL for the handler address will disable interrupts from the pin and detach the handler.
*
* NOTE: Callbacks do not occur from an interrupt handler but rather from the context
* of the worker thread with interrupts enabled.
*
* Input Parameters:
* handle - The handle previously returned by stmpe811_instantiate
* pinconfig - Bit-encoded pin configuration
* handler - The handler that will be called when the interrupt occurs.
*
* Returned Value:
* Zero is returned on success. Otherwise, a negated errno value is returned to indicate
* the nature of the failure.
*
********************************************************************************************/
#if !defined(CONFIG_STMPE811_GPIO_DISABLE) && !defined(CONFIG_STMPE811_GPIOINT_DISABLE)
EXTERN int stmpe811_gpioattach(STMPE811_HANDLE handle, uint8_t pinconfig,
stmpe811_handler_t handler);
#endif
/********************************************************************************************
* Name: stmpe811_adcinitialize
*
* Description:
* Configure for ADC mode operation. Set overall ADC ADC timing that applies to all pins.
*
* Input Parameters:
* handle - The handle previously returned by stmpe811_instantiate
*
* Returned Value:
* Zero is returned on success. Otherwise, a negated errno value is returned to indicate
* the nature of the failure.
*
********************************************************************************************/
#ifndef CONFIG_STMPE811_ADC_DISABLE
EXTERN int stmpe811_adcinitialize(STMPE811_HANDLE handle);
#endif
/********************************************************************************************
* Name: stmpe811_adcconfig
*
* Description:
* Configure a pin for ADC input.
*
* Input Parameters:
* handle - The handle previously returned by stmpe811_instantiate
* pin - The ADC pin number
*
* Returned Value:
* Zero is returned on success. Otherwise, a negated errno value is returned to indicate
* the nature of the failure.
*
********************************************************************************************/
#ifndef CONFIG_STMPE811_ADC_DISABLE
EXTERN int stmpe811_adcconfig(STMPE811_HANDLE handle, int pin);
#endif
/********************************************************************************************
* Name: stmpe811_adcread
*
* Description:
* Read the converted analog input value from the select pin.
*
* Input Parameters:
* handle - The handle previously returned by stmpe811_instantiate
* pin - The ADC pin number
*
* Returned Value:
* The converted value (there is no error reporting mechanism).
*
********************************************************************************************/
#ifndef CONFIG_STMPE811_ADC_DISABLE
EXTERN uint16_t stmpe811_adcread(STMPE811_HANDLE handle, int pin);
#endif
/********************************************************************************************
* Name: stmpe811_tempinitialize
*
* Description:
* Configure the temperature sensor.
*
* Input Parameters:
* handle - The handle previously returned by stmpe811_instantiate
*
* Returned Value:
* Zero is returned on success. Otherwise, a negated errno value is returned to indicate
* the nature of the failure.
*
********************************************************************************************/
EXTERN int stmpe811_tempinitialize(STMPE811_HANDLE handle);
/********************************************************************************************
* Name: stmpe811_tempread
*
* Description:
* Configure the temperature sensor.
*
* Input Parameters:
* handle - The handle previously returned by stmpe811_instantiate
*
* Returned Value:
* Zero is returned on success. Otherwise, a negated errno value is returned to indicate
* the nature of the failure.
*
********************************************************************************************/
EXTERN uint16_t stmpe811_tempread(STMPE811_HANDLE handle);
/********************************************************************************************
* Name: stmpe811_tempinterrupt
*
* Description:
* Configure the temperature sensor to sample the temperature periodically.
* Set the temperature threshold to generate an interrupt and notify
* to the client using the provide callback function pointer.
*
* Input Parameters:
* handle - The handle previously returned by stmpe811_instantiate
* threshold - The threshold temperature value
* direction - True: Generate an interrupt if the temperate exceeds the
* threshold value; False: Generate an interrupt if the
* temperature falls below the threshold value.
* callback - The client callback function that will be called when
* the termperature crosses the threshold.
*
* Returned Value:
* Zero is returned on success. Otherwise, a negated errno value is returned to indicate
* the nature of the failure.
*
********************************************************************************************/
/* Not implemented */
#undef EXTERN
#ifdef __cplusplus
}
#endif
#endif /* CONFIG_INPUT && CONFIG_INPUT_STMPE811 */
#endif /* __INCLUDE_NUTTX_INPUT_STMPE811_H */
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