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apps/examples/max31855: Add an example to read multiple max31855 sensors

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This commit is contained in:
Tiago Almeida 2018-04-09 15:19:14 -06:00 committed by Gregory Nutt
parent 6a6ee2ffd2
commit 5b85750307
5 changed files with 354 additions and 0 deletions
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11
examples/max31855/.gitignore vendored Normal file
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/Make.dep
/.depend
/.built
/*.asm
/*.obj
/*.rel
/*.lst
/*.sym
/*.adb
/*.lib
/*.src

30
examples/max31855/Kconfig Normal file
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#
# For a description of the syntax of this configuration file,
# see the file kconfig-language.txt in the NuttX tools repository.
#
config EXAMPLES_MAX31855
bool "\"max31855\" example"
default n
---help---
Enable the \"max31855, World!\" example
if EXAMPLES_MAX31855
config EXAMPLES_MAX31855_PROGNAME
string "Program name"
default "max31855"
depends on BUILD_KERNEL
---help---
This is the name of the program that will be use when the NSH ELF
program is installed.
config EXAMPLES_MAX31855_PRIORITY
int "max31855 task priority"
default 100
config EXAMPLES_MAX31855_STACKSIZE
int "max31855 stack size"
default 2048
endif

39
examples/max31855/Make.defs Normal file
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############################################################################
# apps/examples/max31855/Make.defs
# Adds selected applications to apps/ build
#
# Copyright (C) 2018 Gregory Nutt. All rights reserved.
# Author: Tiago Almeida <tiagojbalmeida@gmail.com>
#
# 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.
#
############################################################################
ifeq ($(CONFIG_EXAMPLES_MAX31855),y)
CONFIGURED_APPS += examples/max31855
endif

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examples/max31855/Makefile Normal file
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############################################################################
# apps/examples/max31855/Makefile
#
# Copyright (C) 2018 Gregory Nutt. All rights reserved.
# Author: Tiago Almeida <tiagojbalmeida@gmail.com>
#
# 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.
#
############################################################################
-include $(TOPDIR)/Make.defs
# max31855 built-in application info
CONFIG_EXAMPLES_MAX31855_PRIORITY ?= SCHED_PRIORITY_DEFAULT
CONFIG_EXAMPLES_MAX31855_STACKSIZE ?= 2048
APPNAME = max31855
PRIORITY = $(CONFIG_EXAMPLES_MAX31855_PRIORITY)
STACKSIZE = $(CONFIG_EXAMPLES_MAX31855_STACKSIZE)
# max31855 Example
ASRCS =
CSRCS =
MAINSRC = max31855_main.c
CONFIG_EXAMPLES_MAX31855_PROGNAME ?= max31855$(EXEEXT)
PROGNAME = $(CONFIG_EXAMPLES_MAX31855_PROGNAME)
include $(APPDIR)/Application.mk

218
examples/max31855/max31855_main.c Normal file
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/****************************************************************************
* examples/max31855/max31855_main.c
*
* Copyright (C) 2018 Gregory Nutt. All rights reserved.
* Author: Tiago Almeida <tiagojbalmeida@gmail.com>
*
* 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 <nuttx/config.h>
#include <sys/ioctl.h>
#include <stdio.h>
#include <stdlib.h>
#include <fcntl.h>
#include <errno.h>
/****************************************************************************
* Public Functions
****************************************************************************/
#ifdef CONFIG_BUILD_KERNEL
int main(int argc, FAR char *argv[])
#else
int max31855_main(int argc, char *argv[])
#endif
{
/* In this app, only two devices are registered to each SSP channel */
int16_t temp;
int fd0;
int fd1;
int fd2;
int fd3;
int ret;
/* Open files for each registered device to the respective SSP channel */
/* Channel SSP0/SPI1 Device 0 */
fd0 = open("/dev/temp0", O_RDONLY);
if (fd0 < 0)
{
printf("Unable to open file /dev/temp0\n");
}
/* Channel SSP0/SPI1 Device 1 */
fd1 = open("/dev/temp1", O_RDONLY);
if (fd1 < 0)
{
printf("Unable to open file /dev/temp1\n");
}
/* Channel SSP1/SPI2 Device 0 */
fd2 = open("/dev/temp2", O_RDONLY);
if (fd2 < 0)
{
printf("Unable to open file /dev/temp2\n");
}
/* Channel SSP1/SPI2 Device 1 */
fd3 = open("/dev/temp3", O_RDONLY);
if (fd3 < 0)
{
printf("Unable to open file /dev/temp3\n");
}
/* Start reading each file and print sensor temperature if acquired */
printf("Starting...\n");
while(1)
{
printf("Channel SSP0/SPI1 Device 0: ");
if (fd0 < 0)
{
/* The file could not be open, probably the device is not registered */
printf("Not enabled!\n");
}
else
{
ret = read(fd0, &temp, 2);
if (ret < 0)
{
/* The file could not be read, probably some max31855 pin is
* not connected to the channel.
*/
printf("Disconnected!\n");
}
else
{
/* Print temperature value of target device */
printf("Temperature = %d!\n",temp/4);
}
}
printf("Channel SSP0/SPI1 Device 1: ");
if (fd1 < 0)
{
/* The file could not be open, probably the device is not registered */
printf("Not enabled!\n");
}
else
{
ret = read(fd1, &temp, 2);
if (ret < 0)
{
/* The file could not be read, probably some max31855 pin is not
* connected to the channel.
*/
printf("Disconnected!\n");
}
else
{
/* Print temperature value of target device */
printf("Temperature = %d!\n",temp/4);
}
}
printf("Channel SSP1/SPI2 Device 0: ");
if (fd2 < 0)
{
/* The file could not be open, probably the device is not registered */
printf("Not enabled!\n");
}
else
{
ret = read(fd2, &temp, 2);
if (ret < 0)
{
/* The file could not be read, probably some max31855 pin is not
* connected to the channel.
*/
printf("Disconnected!\n");
}
else
{
/* Print temperature value of target device */
printf("Temperature = %d!\n",temp/4);
}
}
printf("Channel SSP1/SPI2 Device 1: ");
if (fd3 < 0)
{
/* The file could not be open, probably the device is not registered */
printf("Not enabled!\n");
}
else
{
ret = read(fd3, &temp, 2);
if (ret < 0)
{
/* The file could not be read,
* probably some max31855 pin is not connected to the channel.
*/
printf("Disconnected!\n");
}
else
{
/* Print temperature value of target device */
printf("Temperature = %d!\n",temp/4);
}
}
printf("\n");
/* One second sample rate */
usleep(1000000);
}
return 0;
}