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/*
* Copyright (C) 2008 The Android Open Source Project
*
* Licensed 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
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* 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.
*/
#include <hardware_legacy/led.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>
#include <errno.h>
#include <stdio.h>
const char* const CADENCE_FILE = "/sys/class/leds/left/cadence";
const char* const COLOR_FILE = "/sys/class/leds/left/color";
const char* const BT_WIFI_FILE = "/sys/class/leds/right/brightness";
static int
write_string(const char* file, const char* string, int len)
{
int fd;
ssize_t amt;
fd = open(file, O_RDWR);
if (fd < 0) {
return errno;
}
amt = write(fd, string, len+1);
close(fd);
return amt >= 0 ? 0 : errno;
}
int sardine_set_led_state(unsigned colorARGB, int onMS, int offMS)
{
int len;
char buf[30];
int red, green, color;
// alpha of 0 or color of 0 (ignoring blue) means off
if ((colorARGB & 0xff000000) == 0 || (colorARGB & 0x00ffff00) == 0) {
onMS = 0;
offMS = 0;
}
// blue means green
if ((colorARGB & 0x00ffff00) == 0 && (colorARGB & 0x000000ff) != 0) {
colorARGB |= (colorARGB & 0x000000ff) << 8;
}
// ===== color =====
// this color conversion isn't really correct, but it's better to
// have the light come bright on when asked for low intensity than to
// not come on at all. we have no blue
red = (colorARGB & 0x00ff0000) ? 1 : 0;
green = (colorARGB & 0x0000ff00) ? 2 : 0;
color = (red | green) - 1;
len = sprintf(buf, "%d", color);
write_string(COLOR_FILE, buf, len);
// ===== color =====
len = sprintf(buf, "%d,%d", onMS, offMS);
write_string(CADENCE_FILE, buf, len);
return 0;
}
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