nes-proj/arch/platform/zoul/dev/led-strip.c

111 lines
3.7 KiB
C

/*
* Copyright (c) 2015, Zolertia
* All rights reserved.
*
* 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 of the Institute 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 INSTITUTE 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 INSTITUTE 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.
*
*/
/*---------------------------------------------------------------------------*/
/**
* \addtogroup zoul-led-strip
* @{
*
* Driver to control a bright LED strip powered at 3VDC, drawing power directly
* from the battery power supply. An example on how to adapt 12VDC LED strips
* to 3VDC is provided at http://www.hackster.io/zolertia
* @{
*
* \file
* Driver for a bright LED strip
*/
/*---------------------------------------------------------------------------*/
#include "contiki.h"
#include "dev/gpio.h"
#include "led-strip.h"
#include <stdint.h>
/*---------------------------------------------------------------------------*/
#ifndef LED_STRIP_PORT
#define LED_STRIP_PORT GPIO_A_NUM
#endif
#ifndef LED_STRIP_PIN
#define LED_STRIP_PIN 6
#endif
#define LED_STRIP_PORT_BASE GPIO_PORT_TO_BASE(LED_STRIP_PORT)
#define LED_STRIP_PIN_MASK GPIO_PIN_MASK(LED_STRIP_PIN)
/*---------------------------------------------------------------------------*/
static uint8_t initialized = 0;
/*---------------------------------------------------------------------------*/
void
led_strip_config(void)
{
/* Software controlled */
GPIO_SOFTWARE_CONTROL(LED_STRIP_PORT_BASE, LED_STRIP_PIN_MASK);
/* Set pin to output */
GPIO_SET_OUTPUT(LED_STRIP_PORT_BASE, LED_STRIP_PIN_MASK);
/* Set the pin to a default position */
GPIO_SET_PIN(LED_STRIP_PORT_BASE, LED_STRIP_PIN_MASK);
initialized = 1;
}
/*---------------------------------------------------------------------------*/
int
led_strip_switch(uint8_t val)
{
if(!initialized) {
return LED_STRIP_ERROR;
}
if(val != LED_STRIP_ON && val != LED_STRIP_OFF) {
return LED_STRIP_ERROR;
}
/* Set the LED to ON or OFF */
GPIO_WRITE_PIN(LED_STRIP_PORT_BASE, LED_STRIP_PIN_MASK, val);
return val;
}
/*---------------------------------------------------------------------------*/
int
led_strip_get(void)
{
if(!initialized) {
return LED_STRIP_ERROR;
}
/* Inverse logic, return ON if the pin is low */
if(GPIO_READ_PIN(LED_STRIP_PORT_BASE, LED_STRIP_PIN_MASK)) {
return LED_STRIP_OFF;
}
return LED_STRIP_ON;
}
/*---------------------------------------------------------------------------*/
/**
* @}
* @}
*/