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Diffstat (limited to 'nuttx/drivers/input/max11802.h')
| -rw-r--r-- | nuttx/drivers/input/max11802.h | 167 |
1 files changed, 167 insertions, 0 deletions
diff --git a/nuttx/drivers/input/max11802.h b/nuttx/drivers/input/max11802.h new file mode 100644 index 000000000..b6beec045 --- /dev/null +++ b/nuttx/drivers/input/max11802.h @@ -0,0 +1,167 @@ +/******************************************************************************************** + * drivers/input/max11802.h + * + * Copyright (C) 2011-2012 Gregory Nutt. All rights reserved. + * Authors: Gregory Nutt <gnutt@nuttx.org> + * Petteri Aimonen <jpa@nx.mail.kapsi.fi> + * + * References: + * "Low-Power, Ultra-Small Resistive Touch-Screen Controllers + * with I2C/SPI Interface" Maxim IC, Rev 3, 10/2010 + * + * 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 __DRIVERS_INPUT_MAX11802_H +#define __DRIVERS_INPUT_MAX11802_H + +/******************************************************************************************** + * Included Files + ********************************************************************************************/ + +#include <nuttx/config.h> + +#include <stdint.h> +#include <semaphore.h> +#include <poll.h> +#include <wdog.h> +#include <nuttx/wqueue.h> + +#include <nuttx/spi.h> +#include <nuttx/clock.h> +#include <nuttx/input/max11802.h> + +/******************************************************************************************** + * Pre-Processor Definitions + ********************************************************************************************/ +/* Configuration ****************************************************************************/ + +/* MAX11802 Interfaces *********************************************************************/ + +/* LSB of register addresses specifies read (1) or write (0). */ +#define MAX11802_CMD_XPOSITION ((0x52 << 1) | 1) +#define MAX11802_CMD_YPOSITION ((0x54 << 1) | 1) +#define MAX11802_CMD_MEASUREXY (0x70 << 1) +#define MAX11802_CMD_MODE_WR (0x0B << 1) +#define MAX11802_CMD_MODE_RD ((0x0B << 1) | 1) +#define MAX11802_CMD_AVG_WR (0x03 << 1) +#define MAX11802_CMD_TIMING_WR (0x05 << 1) +#define MAX11802_CMD_DELAY_WR (0x06 << 1) + +/* Register values to set */ +#define MAX11802_MODE 0x0E +#define MAX11802_AVG 0x55 +#define MAX11802_TIMING 0x77 +#define MAX11802_DELAY 0x55 + +/* Driver support **************************************************************************/ +/* This format is used to construct the /dev/input[n] device driver path. It + * defined here so that it will be used consistently in all places. + */ + +#define DEV_FORMAT "/dev/input%d" +#define DEV_NAMELEN 16 + +/* Poll the pen position while the pen is down at this rate (50MS): */ + +#define MAX11802_WDOG_DELAY ((50 + (MSEC_PER_TICK-1))/ MSEC_PER_TICK) + +/******************************************************************************************** + * Public Types + ********************************************************************************************/ + +/* This describes the state of one contact */ + +enum max11802_contact_3 +{ + CONTACT_NONE = 0, /* No contact */ + CONTACT_DOWN, /* First contact */ + CONTACT_MOVE, /* Same contact, possibly different position */ + CONTACT_UP, /* Contact lost */ +}; + +/* This structure describes the results of one MAX11802 sample */ + +struct max11802_sample_s +{ + uint8_t id; /* Sampled touch point ID */ + uint8_t contact; /* Contact state (see enum ads7843e_contact_e) */ + bool valid; /* True: x,y contain valid, sampled data */ + uint16_t x; /* Measured X position */ + uint16_t y; /* Measured Y position */ +}; + +/* This structure describes the state of one MAX11802 driver instance */ + +struct max11802_dev_s +{ +#ifdef CONFIG_ADS7843E_MULTIPLE + FAR struct ads7843e_dev_s *flink; /* Supports a singly linked list of drivers */ +#endif + uint8_t nwaiters; /* Number of threads waiting for MAX11802 data */ + uint8_t id; /* Current touch point ID */ + volatile bool penchange; /* An unreported event is buffered */ + uint16_t threshx; /* Thresholding X value */ + uint16_t threshy; /* Thresholding Y value */ + sem_t devsem; /* Manages exclusive access to this structure */ + sem_t waitsem; /* Used to wait for the availability of data */ + + FAR struct max11802_config_s *config; /* Board configuration data */ + FAR struct spi_dev_s *spi; /* Saved SPI driver instance */ + struct work_s work; /* Supports the interrupt handling "bottom half" */ + struct max11802_sample_s sample; /* Last sampled touch point data */ + WDOG_ID wdog; /* Poll the position while the pen is down */ + + /* The following is a list if poll structures of threads waiting for + * driver events. The 'struct pollfd' reference for each open is also + * retained in the f_priv field of the 'struct file'. + */ + +#ifndef CONFIG_DISABLE_POLL + struct pollfd *fds[CONFIG_ADS7843E_NPOLLWAITERS]; +#endif +}; + +/******************************************************************************************** + * Public Function Prototypes + ********************************************************************************************/ + +#ifdef __cplusplus +#define EXTERN extern "C" +extern "C" { +#else +#define EXTERN extern +#endif + +#undef EXTERN +#ifdef __cplusplus +} +#endif + +#endif /* __DRIVERS_INPUT_ADS7843E_H */ |