| /* |
| * 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/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; |
| } |