sergiotarxz/nuttx-apps
sergiotarxz/nuttx-apps
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

apps/examples/apa102: Add a Rainbow example for APA102 LED Strip

Browse Source
This commit is contained in:
Alan Carvalho de Assis 2017-09-18 17:03:20 -06:00 committed by Gregory Nutt
parent 43e3da9b5f
commit 22d43409f2
6 changed files with 326 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
examples/README.txt
View File

@ -87,6 +87,11 @@ examples/alarm
CONFIG_EXAMPLES_ALARM_DEVPATH - RTC device path (/dev/rtc0)
ONFIG_EXAMPLES_ALARM_SIGNO - Alarm signal
examples/ap102
^^^^^^^^^^^^^^
Rainbow example for APA102 LED Strip.
examples/bastest
^^^^^^^^^^^^^^^^
This directory contains a small program that will mount a ROMFS file system

11
examples/apa102/.gitignore vendored Normal file
View File

@ -0,0 +1,11 @@
/Make.dep
/.depend
/.built
/*.asm
/*.obj
/*.rel
/*.lst
/*.sym
/*.adb
/*.lib
/*.src

22
examples/apa102/Kconfig Normal file
View File

@ -0,0 +1,22 @@
#
# For a description of the syntax of this configuration file,
# see the file kconfig-language.txt in the NuttX tools repository.
#
config EXAMPLES_APA102
bool "APA102 LED Strip example"
default n
---help---
Enable the APA102 example
if EXAMPLES_APA102
config EXAMPLES_APA102_PROGNAME
string "Program name"
default "apa102"
depends on BUILD_KERNEL
---help---
This is the name of the program that will be use when the NSH ELF
program is installed.
endif

39
examples/apa102/Make.defs Normal file
View File

@ -0,0 +1,39 @@
############################################################################
# apps/examples/apa102/Make.defs
# Adds selected applications to apps/ build
#
# Copyright (C) 2015 Gregory Nutt. All rights reserved.
# Author: Gregory Nutt <gnutt@nuttx.org>
#
# 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_APA102),y)
CONFIGURED_APPS += examples/apa102
endif

53
examples/apa102/Makefile Normal file
View File

@ -0,0 +1,53 @@
############################################################################
# apps/examples/apa102/Makefile
#
# Copyright (C) 2017 Gregory Nutt. All rights reserved.
# Author: Gregory Nutt <gnutt@nuttx.org>
#
# 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 $(TOPDIR)/Make.defs
# APA102 built-in application info
APPNAME = apa102
PRIORITY = SCHED_PRIORITY_DEFAULT
STACKSIZE = 2048
# APA102 Test
ASRCS =
CSRCS =
MAINSRC = apa102_main.c
CONFIG_EXAMPLES_APA102_PROGNAME ?= apa102$(EXEEXT)
PROGNAME = $(CONFIG_EXAMPLES_APA102_PROGNAME)
include $(APPDIR)/Application.mk

196
examples/apa102/apa102_main.c Normal file
View File

@ -0,0 +1,196 @@
/****************************************************************************
* examples/apa102/apa102_main.c
*
* Copyright (C) 2017 Gregory Nutt. All rights reserved.
* Copyright (c) 2015-2017 Pololu Corporation.
* Author: Alan Carvalho de Assis <acassis@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 <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <errno.h>
#include <stdio.h>
#include <nuttx/leds/apa102.h>
/****************************************************************************
* Pre-processor Definitions
****************************************************************************/
#define CONFIG_EXAMPLES_APA102_DEVNAME "/dev/leddrv0"
/****************************************************************************
* Private Data
****************************************************************************/
#define NUM_LEDS 30
#define US_DELAY 1000
struct apa102_ledstrip_s ledstrip[NUM_LEDS];
/****************************************************************************
* Private Functions
****************************************************************************/
/****************************************************************************
* Name: hsvtorgb
*
* Description:
* Converts a color from HSV to RGB.
*
* Note: This function is based on Pololu example:
* https://github.com/pololu/apa102-arduino/blob/master/examples/Rainbow/Rainbow.ino
*
* Input Parameters:
* h is hue, as a number between 0 and 360.
* s is the saturation, as a number between 0 and 255.
* v is the value, as a number between 0 and 255.
*
****************************************************************************/
static struct apa102_ledstrip_s hsvtorgb(uint16_t h, uint8_t s, uint8_t v)
{
struct apa102_ledstrip_s led;
uint8_t f = (h % 60) * 255 / 60;
uint8_t p = (255 - s) * (uint16_t)v / 255;
uint8_t q = (255 - f * (uint16_t)s / 255) * (uint16_t)v / 255;
uint8_t t = (255 - (255 - f) * (uint16_t)s / 255) * (uint16_t)v / 255;
uint8_t r = 0;
uint8_t g = 0;
uint8_t b = 0;
switch((h / 60) % 6)
{
case 0:
r = v;
g = t;
b = p;
break;
case 1:
r = q;
g = v;
b = p;
break;
case 2:
r = p;
g = v;
b = t;
break;
case 3:
r = p;
g = q;
b = v;
break;
case 4:
r = t;
g = p;
b = v;
break;
case 5:
r = v;
g = p;
b = q;
break;
}
led.red = r;
led.green = g;
led.blue = b;
led.bright = 0;
return led;
}
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* apa102_main
****************************************************************************/
#ifdef CONFIG_BUILD_KERNEL
int main(int argc, FAR char *argv[])
#else
int apa102_main(int argc, char *argv[])
#endif
{
int fd;
int ret;
int led;
int miles = 10000;
fd = open(CONFIG_EXAMPLES_APA102_DEVNAME, O_RDWR);
if (fd < 0)
{
fprintf(stderr, "ERROR: Failed to open %s: %d\n",
CONFIG_EXAMPLES_APA102_DEVNAME, errno);
return -1;
}
for (; ; )
{
/* Fill the LED Strip */
for (led = 0; led < NUM_LEDS; led++)
{
uint8_t p = miles - led * 8;
ledstrip[led] = hsvtorgb((uint32_t)p * 359 / 256, 255, 255);
}
/* Write the new colors in all the LEDs */
ret = write(fd, ledstrip, 4 * NUM_LEDS);
if (ret < 0)
{
_err("ERROR: write LED Strip failed: %d\n", errno);
}
usleep(US_DELAY);
miles += (US_DELAY / 1000);
}
close(fd);
return 0;
}