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This commit is contained in:
Gregory Nutt
2020-05-17 08:47:40 -06:00
committed by Alan Carvalho de Assis
parent a569006fd8
commit 57bc329aac
46 changed files with 1095 additions and 1128 deletions
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drivers/input/tsc2007.c
+136 -135
View File
@@ -1,46 +1,31 @@
/****************************************************************************
* drivers/input/tsc2007.c
*
* Copyright (C) 2011-2012, 2016-2017 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <gnutt@nuttx.org>
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership. The
* ASF licenses this file to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance with the
* License. You may obtain a copy of the License at
*
* References:
* "1.2V to 3.6V, 12-Bit, Nanopower, 4-Wire Micro TOUCH SCREEN CONTROLLER
* with I2C Interface," SBAS405A March 2007, Revised, March 2009, Texas
* Instruments Incorporated
* http://www.apache.org/licenses/LICENSE-2.0
*
* 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.
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations
* under the License.
*
****************************************************************************/
/* The TSC2007 is an analog interface circuit for a human interface touch
* screen device. All peripheral functions are controlled through the command
* byte and onboard state machines.
*
* References:
* "1.2V to 3.6V, 12-Bit, Nanopower, 4-Wire Micro TOUCH SCREEN CONTROLLER
* with I2C Interface," SBAS405A March 2007, Revised, March 2009, Texas
* Instruments Incorporated
*/
/****************************************************************************
@@ -79,7 +64,9 @@
/****************************************************************************
* Pre-processor Definitions
****************************************************************************/
/* Configuration ************************************************************/
/* Reference counting is partially implemented, but not needed in the
* current design.
*/
@@ -95,6 +82,7 @@
#define CONFIG_TSC2007_ACTIVATE 1
/* 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.
*/
@@ -200,9 +188,11 @@ static int tsc2007_interrupt(int irq, FAR void *context);
static int tsc2007_open(FAR struct file *filep);
static int tsc2007_close(FAR struct file *filep);
static ssize_t tsc2007_read(FAR struct file *filep, FAR char *buffer, size_t len);
static ssize_t tsc2007_read(FAR struct file *filep, FAR char *buffer,
size_t len);
static int tsc2007_ioctl(FAR struct file *filep, int cmd, unsigned long arg);
static int tsc2007_poll(FAR struct file *filep, struct pollfd *fds, bool setup);
static int tsc2007_poll(FAR struct file *filep, struct pollfd *fds,
bool setup);
/****************************************************************************
* Private Data
@@ -259,10 +249,10 @@ static void tsc2007_notify(FAR struct tsc2007_dev_s *priv)
nxsem_post(&priv->waitsem);
}
/* If there are threads waiting on poll() for TSC2007 data to become available,
* then wake them up now. NOTE: we wake up all waiting threads because we
* do not know that they are going to do. If they all try to read the data,
* then some make end up blocking after all.
/* If there are threads waiting on poll() for TSC2007 data to become
* available, then wake them up now. NOTE: we wake up all waiting
* threads because we do not know that they are going to do. If they
* all try to read the data, then some make end up blocking after all.
*/
for (i = 0; i < CONFIG_TSC2007_NPOLLWAITERS; i++)
@@ -317,11 +307,11 @@ static int tsc2007_sample(FAR struct tsc2007_dev_s *priv,
priv->id++;
}
else if (sample->contact == CONTACT_DOWN)
{
{
/* First report -- next report will be a movement */
priv->sample.contact = CONTACT_MOVE;
}
priv->sample.contact = CONTACT_MOVE;
}
priv->penchange = false;
ret = OK;
@@ -379,8 +369,8 @@ static int tsc2007_waitsample(FAR struct tsc2007_dev_s *priv,
}
/* Re-acquire the semaphore that manages mutually exclusive access to
* the device structure. We may have to wait here. But we have our sample.
* Interrupts and pre-emption will be re-enabled while we wait.
* the device structure. We may have to wait here. But we have our
* sample. Interrupts and pre-emption will be re-enabled while we wait.
*/
ret = nxsem_wait(&priv->devsem);
@@ -410,42 +400,43 @@ errout:
#ifdef CONFIG_TSC2007_ACTIVATE
static int tsc2007_activate(FAR struct tsc2007_dev_s *priv, uint8_t cmd)
{
struct i2c_msg_s msg;
uint8_t data;
int ret;
struct i2c_msg_s msg;
uint8_t data;
int ret;
/* Send the setup command (with no ACK) followed by the A/D converter
* activation command (ACKed).
*/
data = TSC2007_SETUP;
data = TSC2007_SETUP;
msg.frequency = priv->config->frequency; /* I2C frequency */
msg.addr = priv->config->address; /* 7-bit address */
msg.flags = 0; /* Write transaction, beginning with START */
msg.buffer = &data; /* Transfer from this address */
msg.length = 1; /* Send one byte following the address */
msg.frequency = priv->config->frequency; /* I2C frequency */
msg.addr = priv->config->address; /* 7-bit address */
msg.flags = 0; /* Write transaction, beginning with START */
msg.buffer = &data; /* Transfer from this address */
msg.length = 1; /* Send one byte following the address */
/* Ignore errors from the setup command (because it is not ACKed) */
/* Ignore errors from the setup command (because it is not ACKed) */
I2C_TRANSFER(priv->i2c, &msg, 1);
I2C_TRANSFER(priv->i2c, &msg, 1);
/* Now activate the A/D converter */
/* Now activate the A/D converter */
data = cmd;
data = cmd;
msg.frequency = priv->config->frequency; /* I2C frequency */
msg.addr = priv->config->address; /* 7-bit address */
msg.flags = 0; /* Write transaction, beginning with START */
msg.buffer = &data; /* Transfer from this address */
msg.length = 1; /* Send one byte following the address */
msg.frequency = priv->config->frequency; /* I2C frequency */
msg.addr = priv->config->address; /* 7-bit address */
msg.flags = 0; /* Write transaction, beginning with START */
msg.buffer = &data; /* Transfer from this address */
msg.length = 1; /* Send one byte following the address */
ret = I2C_TRANSFER(priv->i2c, &msg, 1);
if (ret < 0)
{
ierr("ERROR: I2C_TRANSFER failed: %d\n", ret);
}
return ret;
ret = I2C_TRANSFER(priv->i2c, &msg, 1);
if (ret < 0)
{
ierr("ERROR: I2C_TRANSFER failed: %d\n", ret);
}
return ret;
}
#else
# define tsc2007_activate(p,c)
@@ -457,9 +448,9 @@ static int tsc2007_activate(FAR struct tsc2007_dev_s *priv, uint8_t cmd)
static int tsc2007_transfer(FAR struct tsc2007_dev_s *priv, uint8_t cmd)
{
struct i2c_msg_s msg;
uint8_t data12[2];
int ret;
struct i2c_msg_s msg;
uint8_t data12[2];
int ret;
/* "A conversion/write cycle begins when the master issues the address
* byte containing the slave address of the TSC2007, with the eighth bit
@@ -473,18 +464,18 @@ static int tsc2007_transfer(FAR struct tsc2007_dev_s *priv, uint8_t cmd)
* STOP condition...
*/
msg.frequency = priv->config->frequency; /* I2C frequency */
msg.addr = priv->config->address; /* 7-bit address */
msg.flags = 0; /* Write transaction, beginning with START */
msg.buffer = &cmd; /* Transfer from this address */
msg.length = 1; /* Send one byte following the address */
msg.frequency = priv->config->frequency; /* I2C frequency */
msg.addr = priv->config->address; /* 7-bit address */
msg.flags = 0; /* Write transaction, beginning with START */
msg.buffer = &cmd; /* Transfer from this address */
msg.length = 1; /* Send one byte following the address */
ret = I2C_TRANSFER(priv->i2c, &msg, 1);
if (ret < 0)
{
ierr("ERROR: I2C_TRANSFER failed: %d\n", ret);
return ret;
}
ret = I2C_TRANSFER(priv->i2c, &msg, 1);
if (ret < 0)
{
ierr("ERROR: I2C_TRANSFER failed: %d\n", ret);
return ret;
}
/* "The input multiplexer channel for the A/D converter is selected when
* bits C3 through C0 are clocked in. If the selected channel is an X-,Y-,
@@ -501,7 +492,7 @@ static int tsc2007_transfer(FAR struct tsc2007_dev_s *priv, uint8_t cmd)
* least 10ms before attempting to read data from the TSC2007...
*/
nxsig_usleep(10*1000);
nxsig_usleep(10 * 1000);
/* "Data access begins with the master issuing a START condition followed
* by the address byte ... with R/W = 1.
@@ -510,35 +501,35 @@ static int tsc2007_transfer(FAR struct tsc2007_dev_s *priv, uint8_t cmd)
* slave issues an acknowledge. The first byte of serial data then follows
* (D11-D4, MSB first).
*
* "After the first byte has been sent by the slave, it releases the SDA line
* for the master to issue an acknowledge. The slave responds with the
* second byte of serial data upon receiving the acknowledge from the master
* (D3-D0, followed by four 0 bits). The second byte is followed by a NOT
* acknowledge bit (ACK = 1) from the master to indicate that the last
* data byte has been received...
* "After the first byte has been sent by the slave, it releases the SDA
* line for the master to issue an acknowledge. The slave responds with
* the second byte of serial data upon receiving the acknowledge from the
* master (D3-D0, followed by four 0 bits). The second byte is followed by
* a NOT acknowledge bit (ACK = 1) from the master to indicate that the
* last data byte has been received...
*/
msg.frequency = priv->config->frequency; /* I2C frequency */
msg.addr = priv->config->address; /* 7-bit address */
msg.flags = I2C_M_READ; /* Read transaction, beginning with START */
msg.buffer = data12; /* Transfer to this address */
msg.length = 2; /* Read two bytes following the address */
msg.frequency = priv->config->frequency; /* I2C frequency */
msg.addr = priv->config->address; /* 7-bit address */
msg.flags = I2C_M_READ; /* Read transaction, beginning with START */
msg.buffer = data12; /* Transfer to this address */
msg.length = 2; /* Read two bytes following the address */
ret = I2C_TRANSFER(priv->i2c, &msg, 1);
if (ret < 0)
{
ierr("ERROR: I2C_TRANSFER failed: %d\n", ret);
return ret;
}
ret = I2C_TRANSFER(priv->i2c, &msg, 1);
if (ret < 0)
{
ierr("ERROR: I2C_TRANSFER failed: %d\n", ret);
return ret;
}
/* Get the MS 8 bits from the first byte and the remaining LS 4 bits from
* the second byte. The valid range of data is then from 0 to 4095 with
* the LSB unit corresponding to Vref/4096.
*/
ret = (unsigned int)data12[0] << 4 | (unsigned int)data12[1] >> 4;
iinfo("data: 0x%04x\n", ret);
return ret;
ret = (unsigned int)data12[0] << 4 | (unsigned int)data12[1] >> 4;
iinfo("data: 0x%04x\n", ret);
return ret;
}
/****************************************************************************
@@ -573,8 +564,9 @@ static void tsc2007_worker(FAR void *arg)
if (!pendown)
{
/* Ignore the interrupt if the pen was already down (CONTACT_NONE == pen up and
* already reported. CONTACT_UP == pen up, but not reported)
/* Ignore the interrupt if the pen was already down (CONTACT_NONE ==
* pen up and already reported. CONTACT_UP == pen up, but not
* reported)
*/
if (priv->sample.contact == CONTACT_NONE)
@@ -584,13 +576,13 @@ static void tsc2007_worker(FAR void *arg)
}
/* It is a pen down event. If the last loss-of-contact event has not been
* processed yet, then we have to ignore the pen down event (or else it will
* look like a drag event)
* processed yet, then we have to ignore the pen down event (or else it
* will look like a drag event)
*/
else if (priv->sample.contact == CONTACT_UP)
{
goto errout;
goto errout;
}
else
{
@@ -598,47 +590,50 @@ static void tsc2007_worker(FAR void *arg)
*
* "A resistive touch screen operates by applying a voltage across a
* resistor network and measuring the change in resistance at a given
* point on the matrix where the screen is touched by an input (stylus,
* pen, or finger). The change in the resistance ratio marks the location
* on the touch screen.
* point on the matrix where the screen is touched by an input
* (stylus, pen, or finger). The change in the resistance ratio marks
* the location on the touch screen.
*
* "The 4-wire touch screen panel works by applying a voltage across the
* vertical or horizontal resistive network. The A/D converter converts
* the voltage measured at the point where the panel is touched. A measurement
* of the Y position of the pointing device is made by connecting the X+
* input to a data converter chip, turning on the Y+ and Y- drivers, and
* digitizing the voltage seen at the X+ input ..."
* "The 4-wire touch screen panel works by applying a voltage across
* the vertical or horizontal resistive network. The A/D converter
* converts the voltage measured at the point where the panel is
* touched. A measurement of the Y position of the pointing device is
* made by connecting the X+ input to a data converter chip, turning
* on the Y+ and Y- drivers, and digitizing the voltage seen at the
* X+ input ..."
*
* "... it is recommended that whenever the host writes to the TSC2007, the
* master processor masks the interrupt associated to PENIRQ. This masking
* prevents false triggering of interrupts when the PENIRQ line is disabled
* in the cases previously listed."
* "... it is recommended that whenever the host writes to the TSC2007,
* the master processor masks the interrupt associated to PENIRQ.
* This masking prevents false triggering of interrupts when the
* PENIRQ line is disabled in the cases previously listed."
*/
tsc2007_activate(priv, TSC2007_ACTIVATE_X);
y = tsc2007_transfer(priv, TSC2007_MEASURE_Y);
/* "Voltage is then applied to the other axis, and the A/D converter
* converts the voltage representing the X position on the screen. This
* process provides the X and Y coordinates to the associated processor."
* converts the voltage representing the X position on the screen.
* This process provides the X and Y coordinates to the associated
* processor."
*/
tsc2007_activate(priv, TSC2007_ACTIVATE_Y);
x = tsc2007_transfer(priv, TSC2007_MEASURE_X);
/* "... To determine pen or finger touch, the pressure of the touch must be
* determined. ... There are several different ways of performing this
* measurement. The TSC2007 supports two methods. The first method requires
* knowing the X-plate resistance, the measurement of the X-position, and two
* additional cross panel measurements (Z2 and Z1) of the touch screen."
/* "... To determine pen or finger touch, the pressure of the touch
* must be determined. ... There are several different ways of
* performing this measurement. The TSC2007 supports two methods. The
* first method requires knowing the X-plate resistance, the
* measurement of the X-position, and two additional cross panel
* measurements (Z2 and Z1) of the touch screen."
*
* Rtouch = Rxplate * (X / 4096)* (Z2/Z1 - 1)
*
* "The second method requires knowing both the X-plate and Y-plate
* resistance, measurement of X-position and Y-position, and Z1 ..."
*
* Rtouch = Rxplate * (X / 4096) * (4096/Z1 - 1) - Ryplate * (1 - Y/4096)
* Rtouch = Rxplate * (X / 4096) * (4096/Z1 - 1) -
* Ryplate * (1 - Y/4096)
*
* Read Z1 and Z2 values.
*/
@@ -880,7 +875,8 @@ static int tsc2007_close(FAR struct file *filep)
* Name: tsc2007_read
****************************************************************************/
static ssize_t tsc2007_read(FAR struct file *filep, FAR char *buffer, size_t len)
static ssize_t tsc2007_read(FAR struct file *filep, FAR char *buffer,
size_t len)
{
FAR struct inode *inode;
FAR struct tsc2007_dev_s *priv;
@@ -930,7 +926,7 @@ static ssize_t tsc2007_read(FAR struct file *filep, FAR char *buffer, size_t len
{
ret = -EAGAIN;
goto errout;
}
}
/* Wait for sample data */
@@ -980,16 +976,20 @@ static ssize_t tsc2007_read(FAR struct file *filep, FAR char *buffer, size_t len
{
/* Loss of contact */
report->point[0].flags = TOUCH_DOWN | TOUCH_ID_VALID | TOUCH_POS_VALID;
report->point[0].flags = TOUCH_DOWN | TOUCH_ID_VALID |
TOUCH_POS_VALID;
}
else /* if (sample->contact == CONTACT_MOVE) */
{
/* Movement of the same contact */
report->point[0].flags = TOUCH_MOVE | TOUCH_ID_VALID | TOUCH_POS_VALID;
report->point[0].flags = TOUCH_MOVE | TOUCH_ID_VALID |
TOUCH_POS_VALID;
}
/* A pressure measurement of zero means that pressure is not available */
/* A pressure measurement of zero means that pressure is not
* available.
*/
if (report->point[0].pressure != 0)
{
@@ -1212,7 +1212,8 @@ int tsc2007_register(FAR struct i2c_master_s *dev,
#ifndef CONFIG_TSC2007_MULTIPLE
priv = &g_tsc2007;
#else
priv = (FAR struct tsc2007_dev_s *)kmm_malloc(sizeof(struct tsc2007_dev_s));
priv = (FAR struct tsc2007_dev_s *)
kmm_malloc(sizeof(struct tsc2007_dev_s));
if (!priv)
{
ierr("ERROR: kmm_malloc(%d) failed\n", sizeof(struct tsc2007_dev_s));