From a17f13da064ce7a0c8430f4f0bfff5da063c8d4c Mon Sep 17 00:00:00 2001 From: patacongo Date: Sun, 6 May 2012 16:28:43 +0000 Subject: Add STMPE11 temperature sensor logic git-svn-id: https://nuttx.svn.sourceforge.net/svnroot/nuttx/trunk@4704 7fd9a85b-ad96-42d3-883c-3090e2eb8679 --- nuttx/drivers/input/Make.defs | 3 + nuttx/drivers/input/stmpe11_temp.c | 174 +++++++++++++++++++++++++++++++++++++ 2 files changed, 177 insertions(+) create mode 100644 nuttx/drivers/input/stmpe11_temp.c (limited to 'nuttx/drivers') diff --git a/nuttx/drivers/input/Make.defs b/nuttx/drivers/input/Make.defs index c8d24649b..c7c715b70 100644 --- a/nuttx/drivers/input/Make.defs +++ b/nuttx/drivers/input/Make.defs @@ -58,6 +58,9 @@ endif ifneq ($(CONFIG_INPUT_STMPE11_ADC_DISABLE),y) CSRCS += stmpe11_adc.c endif +ifneq ($(CONFIG_INPUT_STMPE11_TEMP_DISABLE),y) + CSRCS += stmpe11_temp.c +endif endif # Include input device driver build support diff --git a/nuttx/drivers/input/stmpe11_temp.c b/nuttx/drivers/input/stmpe11_temp.c new file mode 100644 index 000000000..8c7406761 --- /dev/null +++ b/nuttx/drivers/input/stmpe11_temp.c @@ -0,0 +1,174 @@ +/**************************************************************************** + * drivers/input/stmpe11_temp.c + * + * Copyright (C) 2012 Gregory Nutt. All rights reserved. + * Author: Gregory Nutt + * + * 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. + * + ****************************************************************************/ + +/**************************************************************************** + * Included Files + ****************************************************************************/ + +#include + +#include +#include +#include + +#include + +#include "stmpe11.h" + +#if defined(CONFIG_INPUT) && defined(CONFIG_INPUT_STMPE11) && !defined(CONFIG_STMPE11_TEMP_DISABLE) + +/**************************************************************************** + * Private Types + ****************************************************************************/ + +/**************************************************************************** + * Private Data + ****************************************************************************/ + +/**************************************************************************** + * Private Functions + ****************************************************************************/ + +/**************************************************************************** + * Public Functions + ****************************************************************************/ + +/**************************************************************************** + * Name: stmpe11_tempinitialize + * + * Description: + * Configure the temperature sensor. + * + * Input Parameters: + * handle - The handle previously returned by stmpe11_instantiate + * + * Returned Value: + * Zero is returned on success. Otherwise, a negated errno value is + * returned to indicate the nature of the failure. + * + ****************************************************************************/ + +int stmpe11_tempinitialize(STMPE11_HANDLE handle) +{ + FAR struct stmpe11_dev_s *priv = (FAR struct stmpe11_dev_s *)handle; + uint8_t regval; + + /* Enable clocking for ADC and the temperature sensor */ + + regval = stmpe11_getreg8(priv, STMPE11_SYS_CTRL2); + regval &= ~(SYS_CTRL2_TS_OFF | SYS_CTRL2_ADC_OFF); + stmpe11_putreg8(priv, STMPE11_SYS_CTRL2, regval); + + /* Enable the temperature sensor */ + + stmpe11_putreg8(priv, STMPE11_TEMP_CTRL, TEMP_CTRL_ENABLE); + + /* Aquire data enable */ + + stmpe11_putreg8(priv, STMPE11_TEMP_CTRL, (TEMP_CTRL_ACQ|TEMP_CTRL_ENABLE)); + + return OK; +} + +/**************************************************************************** + * Name: stmpe11_tempread + * + * Description: + * Configure the temperature sensor. + * + * Input Parameters: + * handle - The handle previously returned by stmpe11_instantiate + * + * Returned Value: + * Zero is returned on success. Otherwise, a negated errno value is + * returned to indicate the nature of the failure. + * + ****************************************************************************/ + +uint16_t stmpe11_tempread(STMPE11_HANDLE handle) +{ + FAR struct stmpe11_dev_s *priv = (FAR struct stmpe11_dev_s *)handle; + uint32_t temp = 0; + uint8_t temp1; + uint8_t temp2; + + /* Acquire data enable */ + + stmpe11_putreg8(priv, STMPE11_TEMP_CTRL, (TEMP_CTRL_ACQ|TEMP_CTRL_ENABLE)); + + /* Read the tempreature */ + + temp1 = stmpe11_getreg8(priv, STMPE11_SYS_CTRL2); + temp2 = stmpe11_getreg8(priv, STMPE11_SYS_CTRL2+1); + + /* Scale the tempreature */ + + temp = ((uint32_t)(temp1 & 3) << 8) | temp2; + temp = (uint32_t)((33 * temp * 100) / 751); + temp = (uint32_t)((temp + 5) / 10); + + return (uint16_t)temp; +} + +/**************************************************************************** + * Name: stmpe11_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 stmpe11_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 */ + +#endif /* CONFIG_INPUT && CONFIG_INPUT_STMPE11 && !CONFIG_STMPE11_TEMP_DISABLE */ + -- cgit v1.2.3