移植Android工具getevent到嵌入式Linux系统
1、前言
getevent工具能够在嵌入式终端设备上运行，并且能够提供嵌入式终端输入设备和Linux内核输入事件的实时转储关系，可以确保设备驱动程序报告各个输入设备的一系列预期功能并生成输入事件所需的信息流，关于getevent工具的使用方法，可以参考文章《Android系统getevent用法》，链接如下所示：
https://www.cnblogs.com/liangliangge/p/12626248.html
本文将主要介绍如何移植Android工具getevent到嵌入式Linux系统。
2、移植getevent工具
嵌入式的开发环境如下所示：
宿主机：Ubuntu 16.04系统
目标板：Hi3516DV300嵌入式开发板
交叉编译工具链：arm-himix200-linux-
移植修改后的getevent工具源码为getevent.c，该文件的内容如下所示：
#include <stdio.h> #include <stdlib.h> #include <string.h> #include <stdint.h> #include <dirent.h> #include <fcntl.h> #include <sys/ioctl.h> #include <sys/inotify.h> //#include <sys/limits.h> #include <sys/poll.h> #include <linux/input.h> #include <errno.h> #include <unistd.h> #include <time.h> struct label { const char *name; int value; }; #define LABEL(constant) { #constant, constant } #define LABEL_END { NULL, -1 } static struct label key_value_labels[] = { { "UP", 0 }, { "DOWN", 1 }, { "REPEAT", 2 }, LABEL_END, }; #include "input.h-labels.h" #undef LABEL #undef LABEL_END static struct pollfd *ufds; static char **device_names; static int nfds; enum { PRINT_DEVICE_ERRORS = 1U << 0, PRINT_DEVICE = 1U << 1, PRINT_DEVICE_NAME = 1U << 2, PRINT_DEVICE_INFO = 1U << 3, PRINT_VERSION = 1U << 4, PRINT_POSSIBLE_EVENTS = 1U << 5, PRINT_INPUT_PROPS = 1U << 6, PRINT_HID_DESCRIPTOR = 1U << 7, PRINT_ALL_INFO = (1U << 8) - 1, PRINT_LABELS = 1U << 16, }; static const char *get_label(const struct label *labels, int value) { while(labels->name && value != labels->value) { labels++; } return labels->name; } static int print_input_props(int fd) { uint8_t bits[INPUT_PROP_CNT / 8]; int i, j; int res; int count; const char *bit_label; printf(" input props:\n"); res = ioctl(fd, EVIOCGPROP(sizeof(bits)), bits); if(res < 0) { printf(" <not available\n"); return 1; } count = 0; for(i = 0; i < res; i++) { for(j = 0; j < 8; j++) { if (bits[i] & 1 << j) { bit_label = get_label(input_prop_labels, i * 8 + j); if(bit_label) printf(" %s\n", bit_label); else printf(" %04x\n", i * 8 + j); count++; } } } if (!count) printf(" <none>\n"); return 0; } static int print_possible_events(int fd, int print_flags) { uint8_t *bits = NULL; ssize_t bits_size = 0; const char* label; int i, j, k; int res, res2; struct label* bit_labels; const char *bit_label; printf(" events:\n"); for(i = EV_KEY; i <= EV_MAX; i++) { // skip EV_SYN since we cannot query its available codes int count = 0; while(1) { res = ioctl(fd, EVIOCGBIT(i, bits_size), bits); if(res < bits_size) break; bits_size = res + 16; bits = realloc(bits, bits_size * 2); if(bits == NULL) { fprintf(stderr, "failed to allocate buffer of size %d\n", (int)bits_size); return 1; } } res2 = 0; switch(i) { case EV_KEY: res2 = ioctl(fd, EVIOCGKEY(res), bits + bits_size); label = "KEY"; bit_labels = key_labels; break; case EV_REL: label = "REL"; bit_labels = rel_labels; break; case EV_ABS: label = "ABS"; bit_labels = abs_labels; break; case EV_MSC: label = "MSC"; bit_labels = msc_labels; break; case EV_LED: res2 = ioctl(fd, EVIOCGLED(res), bits + bits_size); label = "LED"; bit_labels = led_labels; break; case EV_SND: res2 = ioctl(fd, EVIOCGSND(res), bits + bits_size); label = "SND"; bit_labels = snd_labels; break; case EV_SW: res2 = ioctl(fd, EVIOCGSW(bits_size), bits + bits_size); label = "SW "; bit_labels = sw_labels; break; case EV_REP: label = "REP"; bit_labels = rep_labels; break; case EV_FF: label = "FF "; bit_labels = ff_labels; break; case EV_PWR: label = "PWR"; bit_labels = NULL; break; case EV_FF_STATUS: label = "FFS"; bit_labels = ff_status_labels; break; default: res2 = 0; label = "???"; bit_labels = NULL; } for(j = 0; j < res; j++) { for(k = 0; k < 8; k++) if(bits[j] & 1 << k) { char down; if(j < res2 && (bits[j + bits_size] & 1 << k)) down = '*'; else down = ' '; if(count == 0) printf(" %s (%04x):", label, i); else if((count & (print_flags & PRINT_LABELS ? 0x3 : 0x7)) == 0 || i == EV_ABS) printf("\n "); if(bit_labels && (print_flags & PRINT_LABELS)) { bit_label = get_label(bit_labels, j * 8 + k); if(bit_label) printf(" %.20s%c%*s", bit_label, down, (int) (20 - strlen(bit_label)), ""); else printf(" %04x%c ", j * 8 + k, down); } else { printf(" %04x%c", j * 8 + k, down); } if(i == EV_ABS) { struct input_absinfo abs; if(ioctl(fd, EVIOCGABS(j * 8 + k), &abs) == 0) { printf(" : value %d, min %d, max %d, fuzz %d, flat %d, resolution %d", abs.value, abs.minimum, abs.maximum, abs.fuzz, abs.flat, abs.resolution); } } count++; } } if(count) printf("\n"); } free(bits); return 0; } static void print_event(int type, int code, int value, int print_flags) { const char *type_label, *code_label, *value_label; if (print_flags & PRINT_LABELS) { type_label = get_label(ev_labels, type); code_label = NULL; value_label = NULL; switch(type) { case EV_SYN: code_label = get_label(syn_labels, code); break; case EV_KEY: code_label = get_label(key_labels, code); value_label = get_label(key_value_labels, value); break; case EV_REL: code_label = get_label(rel_labels, code); break; case EV_ABS: code_label = get_label(abs_labels, code); switch(code) { case ABS_MT_TOOL_TYPE: value_label = get_label(mt_tool_labels, value); } break; case EV_MSC: code_label = get_label(msc_labels, code); break; case EV_LED: code_label = get_label(led_labels, code); break; case EV_SND: code_label = get_label(snd_labels, code); break; case EV_SW: code_label = get_label(sw_labels, code); break; case EV_REP: code_label = get_label(rep_labels, code); break; case EV_FF: code_label = get_label(ff_labels, code); break; case EV_FF_STATUS: code_label = get_label(ff_status_labels, code); break; } if (type_label) printf("%-12.12s", type_label); else printf("%04x ", type); if (code_label) printf(" %-20.20s", code_label); else printf(" %04x ", code); if (value_label) printf(" %-20.20s", value_label); else printf(" %08x ", value); } else { printf("%04x %04x %08x", type, code, value); } } static void print_hid_descriptor(int bus, int vendor, int product) { const char *dirname = "/sys/kernel/debug/hid"; char prefix[16]; DIR *dir; struct dirent *de; char filename[PATH_MAX]; FILE *file; char line[2048]; snprintf(prefix, sizeof(prefix), "%04X:%04X:%04X.", bus, vendor, product); dir = opendir(dirname); if(dir == NULL) return; while((de = readdir(dir))) { if (strstr(de->d_name, prefix) == de->d_name) { snprintf(filename, sizeof(filename), "%s/%s/rdesc", dirname, de->d_name); file = fopen(filename, "r"); if (file) { printf(" HID descriptor: %s\n\n", de->d_name); while (fgets(line, sizeof(line), file)) { fputs(" ", stdout); fputs(line, stdout); } fclose(file); puts(""); } } } closedir(dir); } static int open_device(const char *device, int print_flags) { int version; int fd; int clkid = CLOCK_MONOTONIC; struct pollfd *new_ufds; char **new_device_names; char name[80]; char location[80]; char idstr[80]; struct input_id id; fd = open(device, O_RDWR); if(fd < 0) { if(print_flags & PRINT_DEVICE_ERRORS) fprintf(stderr, "could not open %s, %s\n", device, strerror(errno)); return -1; } if(ioctl(fd, EVIOCGVERSION, &version)) { if(print_flags & PRINT_DEVICE_ERRORS) fprintf(stderr, "could not get driver version for %s, %s\n", device, strerror(errno)); return -1; } if(ioctl(fd, EVIOCGID, &id)) { if(print_flags & PRINT_DEVICE_ERRORS) fprintf(stderr, "could not get driver id for %s, %s\n", device, strerror(errno)); return -1; } name[sizeof(name) - 1] = '\0'; location[sizeof(location) - 1] = '\0'; idstr[sizeof(idstr) - 1] = '\0'; if(ioctl(fd, EVIOCGNAME(sizeof(name) - 1), &name) < 1) { //fprintf(stderr, "could not get device name for %s, %s\n", device, strerror(errno)); name[0] = '\0'; } if(ioctl(fd, EVIOCGPHYS(sizeof(location) - 1), &location) < 1) { //fprintf(stderr, "could not get location for %s, %s\n", device, strerror(errno)); location[0] = '\0'; } if(ioctl(fd, EVIOCGUNIQ(sizeof(idstr) - 1), &idstr) < 1) { //fprintf(stderr, "could not get idstring for %s, %s\n", device, strerror(errno)); idstr[0] = '\0'; } if (ioctl(fd, EVIOCSCLOCKID, &clkid) != 0) { fprintf(stderr, "Can't enable monotonic clock reporting: %s\n", strerror(errno)); // a non-fatal error } new_ufds = realloc(ufds, sizeof(ufds[0]) * (nfds + 1)); if(new_ufds == NULL) { fprintf(stderr, "out of memory\n"); return -1; } ufds = new_ufds; new_device_names = realloc(device_names, sizeof(device_names[0]) * (nfds + 1)); if(new_device_names == NULL) { fprintf(stderr, "out of memory\n"); return -1; } device_names = new_device_names; if(print_flags & PRINT_DEVICE) printf("add device %d: %s\n", nfds, device); if(print_flags & PRINT_DEVICE_INFO) printf(" bus: %04x\n" " vendor %04x\n" " product %04x\n" " version %04x\n", id.bustype, id.vendor, id.product, id.version); if(print_flags & PRINT_DEVICE_NAME) printf(" name: \"%s\"\n", name); if(print_flags & PRINT_DEVICE_INFO) printf(" location: \"%s\"\n" " id: \"%s\"\n", location, idstr); if(print_flags & PRINT_VERSION) printf(" version: %d.%d.%d\n", version >> 16, (version >> 8) & 0xff, version & 0xff); if(print_flags & PRINT_POSSIBLE_EVENTS) { print_possible_events(fd, print_flags); } if(print_flags & PRINT_INPUT_PROPS) { print_input_props(fd); } if(print_flags & PRINT_HID_DESCRIPTOR) { print_hid_descriptor(id.bustype, id.vendor, id.product); } ufds[nfds].fd = fd; ufds[nfds].events = POLLIN; device_names[nfds] = strdup(device); nfds++; return 0; } int close_device(const char *device, int print_flags) { int i; for(i = 1; i < nfds; i++) { if(strcmp(device_names[i], device) == 0) { int count = nfds - i - 1; if(print_flags & PRINT_DEVICE) printf("remove device %d: %s\n", i, device); free(device_names[i]); memmove(device_names + i, device_names + i + 1, sizeof(device_names[0]) * count); memmove(ufds + i, ufds + i + 1, sizeof(ufds[0]) * count); nfds--; return 0; } } if(print_flags & PRINT_DEVICE_ERRORS) fprintf(stderr, "remote device: %s not found\n", device); return -1; } static int read_notify(const char *dirname, int nfd, int print_flags) { int res; char devname[PATH_MAX]; char *filename; char event_buf[512]; int event_size; int event_pos = 0; struct inotify_event *event; res = read(nfd, event_buf, sizeof(event_buf)); if(res < (int)sizeof(*event)) { if(errno == EINTR) return 0; fprintf(stderr, "could not get event, %s\n", strerror(errno)); return 1; } //printf("got %d bytes of event information\n", res); strcpy(devname, dirname); filename = devname + strlen(devname); *filename++ = '/'; while(res >= (int)sizeof(*event)) { event = (struct inotify_event *)(event_buf + event_pos); //printf("%d: %08x \"%s\"\n", event->wd, event->mask, event->len ? event->name : ""); if(event->len) { strcpy(filename, event->name); if(event->mask & IN_CREATE) { open_device(devname, print_flags); } else { close_device(devname, print_flags); } } event_size = sizeof(*event) + event->len; res -= event_size; event_pos += event_size; } return 0; } static int scan_dir(const char *dirname, int print_flags) { char devname[PATH_MAX]; char *filename; DIR *dir; struct dirent *de; dir = opendir(dirname); if(dir == NULL) return -1; strcpy(devname, dirname); filename = devname + strlen(devname); *filename++ = '/'; while((de = readdir(dir))) { if(de->d_name[0] == '.' && (de->d_name[1] == '\0' || (de->d_name[1] == '.' && de->d_name[2] == '\0'))) continue; strcpy(filename, de->d_name); open_device(devname, print_flags); } closedir(dir); return 0; } static void usage(char *name) { fprintf(stderr, "Usage: %s [-t] [-n] [-s switchmask] [-S] [-v [mask]] [-d] [-p] [-i] [-l] [-q] [-c count] [-r] [device]\n", name); fprintf(stderr, " -t: show time stamps\n"); fprintf(stderr, " -n: don't print newlines\n"); fprintf(stderr, " -s: print switch states for given bits\n"); fprintf(stderr, " -S: print all switch states\n"); fprintf(stderr, " -v: verbosity mask (errs=1, dev=2, name=4, info=8, vers=16, pos. events=32, props=64)\n"); fprintf(stderr, " -d: show HID descriptor, if available\n"); fprintf(stderr, " -p: show possible events (errs, dev, name, pos. events)\n"); fprintf(stderr, " -i: show all device info and possible events\n"); fprintf(stderr, " -l: label event types and names in plain text\n"); fprintf(stderr, " -q: quiet (clear verbosity mask)\n"); fprintf(stderr, " -c: print given number of events then exit\n"); fprintf(stderr, " -r: print rate events are received\n"); } int main(int argc, char *argv[]) { int c; int i; int res; int get_time = 0; int print_device = 0; char *newline = "\n"; uint16_t get_switch = 0; struct input_event event; int print_flags = 0; int print_flags_set = 0; int dont_block = -1; int event_count = 0; int sync_rate = 0; int64_t last_sync_time = 0; const char *device = NULL; const char *device_path = "/dev/input"; opterr = 0; do { c = getopt(argc, argv, "tns:Sv::dpilqc:rh"); if (c == EOF) break; switch (c) { case 't': get_time = 1; break; case 'n': newline = ""; break; case 's': get_switch = strtoul(optarg, NULL, 0); if(dont_block == -1) dont_block = 1; break; case 'S': get_switch = ~0; if(dont_block == -1) dont_block = 1; break; case 'v': if(optarg) print_flags |= strtoul(optarg, NULL, 0); else print_flags |= PRINT_DEVICE | PRINT_DEVICE_NAME | PRINT_DEVICE_INFO | PRINT_VERSION; print_flags_set = 1; break; case 'd': print_flags |= PRINT_HID_DESCRIPTOR; break; case 'p': print_flags |= PRINT_DEVICE_ERRORS | PRINT_DEVICE | PRINT_DEVICE_NAME | PRINT_POSSIBLE_EVENTS | PRINT_INPUT_PROPS; print_flags_set = 1; if(dont_block == -1) dont_block = 1; break; case 'i': print_flags |= PRINT_ALL_INFO; print_flags_set = 1; if(dont_block == -1) dont_block = 1; break; case 'l': print_flags |= PRINT_LABELS; break; case 'q': print_flags_set = 1; break; case 'c': event_count = atoi(optarg); dont_block = 0; break; case 'r': sync_rate = 1; break; case '?': fprintf(stderr, "%s: invalid option -%c\n", argv[0], optopt); case 'h': usage(argv[0]); exit(1); } } while (1); if(dont_block == -1) dont_block = 0; if (optind + 1 == argc) { device = argv[optind]; optind++; } if (optind != argc) { usage(argv[0]); exit(1); } nfds = 1; ufds = calloc(1, sizeof(ufds[0])); ufds[0].fd = inotify_init(); ufds[0].events = POLLIN; if(device) { if(!print_flags_set) print_flags |= PRINT_DEVICE_ERRORS; res = open_device(device, print_flags); if(res < 0) { return 1; } } else { if(!print_flags_set) print_flags |= PRINT_DEVICE_ERRORS | PRINT_DEVICE | PRINT_DEVICE_NAME; print_device = 1; res = inotify_add_watch(ufds[0].fd, device_path, IN_DELETE | IN_CREATE); if(res < 0) { fprintf(stderr, "could not add watch for %s, %s\n", device_path, strerror(errno)); return 1; } res = scan_dir(device_path, print_flags); if(res < 0) { fprintf(stderr, "scan dir failed for %s\n", device_path); return 1; } } if(get_switch) { for(i = 1; i < nfds; i++) { uint16_t sw; res = ioctl(ufds[i].fd, EVIOCGSW(1), &sw); if(res < 0) { fprintf(stderr, "could not get switch state, %s\n", strerror(errno)); return 1; } sw &= get_switch; printf("%04x%s", sw, newline); } } if(dont_block) return 0; while(1) { //int pollres = poll(ufds, nfds, -1); //printf("poll %d, returned %d\n", nfds, pollres); if(ufds[0].revents & POLLIN) { read_notify(device_path, ufds[0].fd, print_flags); } for(i = 1; i < nfds; i++) { if(ufds[i].revents) { if(ufds[i].revents & POLLIN) { res = read(ufds[i].fd, &event, sizeof(event)); if(res < (int)sizeof(event)) { fprintf(stderr, "could not get event\n"); return 1; } if(get_time) { printf("[%8ld.%06ld] ", event.time.tv_sec, event.time.tv_usec); } if(print_device) printf("%s: ", device_names[i]); print_event(event.type, event.code, event.value, print_flags); if(sync_rate && event.type == 0 && event.code == 0) { int64_t now = event.time.tv_sec * 1000000LL + event.time.tv_usec; if(last_sync_time) printf(" rate %lld", 1000000LL / (now - last_sync_time)); last_sync_time = now; } printf("%s", newline); if(event_count && --event_count == 0) return 0; } } } } return 0; }
在源码getevent.c中引用了头文件"input.h-labels.h"，该头文件是使用generate-input.h-labels.py脚本自动生成的，generate-input.h-labels.py脚本内容如下所示：
#!/usr/bin/env python # # Copyright (C) 2015 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. # # pylint: disable=bad-indentation,bad-continuation from __future__ import print_function import os import re import sys input_prop_list = [] ev_list = [] syn_list = [] key_list = [] rel_list = [] abs_list = [] sw_list = [] msc_list = [] led_list = [] rep_list = [] snd_list = [] mt_tool_list = [] ff_status_list = [] ff_list = [] r = re.compile(r'#define\s+(\S+)\s+((?:0x)?\d+)') with open(sys.argv[1], 'r') as f: for line in f: m = r.match(line) if m: name = m.group(1) if name.startswith("INPUT_PROP_"): input_prop_list.append(name) elif name.startswith("EV_"): ev_list.append(name) elif name.startswith("SYN_"): syn_list.append(name) elif name.startswith("KEY_") or name.startswith("BTN_"): key_list.append(name) elif name.startswith("REL_"): rel_list.append(name) elif name.startswith("ABS_"): abs_list.append(name) elif name.startswith("SW_"): sw_list.append(name) elif name.startswith("MSC_"): msc_list.append(name) elif name.startswith("LED_"): led_list.append(name) elif name.startswith("REP_"): rep_list.append(name) elif name.startswith("SND_"): snd_list.append(name) elif name.startswith("MT_TOOL_"): mt_tool_list.append(name) elif name.startswith("FF_STATUS_"): ff_status_list.append(name) elif name.startswith("FF_"): ff_list.append(name) def Dump(struct_name, values): print('static struct label %s[] = {' % (struct_name)) for value in values: print(' LABEL(%s),' % (value)) print(' LABEL_END,') print('};') Dump("input_prop_labels", input_prop_list) Dump("ev_labels", ev_list) Dump("syn_labels", syn_list) Dump("key_labels", key_list) Dump("rel_labels", rel_list) Dump("abs_labels", abs_list) Dump("sw_labels", sw_list) Dump("msc_labels", msc_list) Dump("led_labels", led_list) Dump("rep_labels", rep_list) Dump("snd_labels", snd_list) Dump("mt_tool_labels", mt_tool_list) Dump("ff_status_labels", ff_status_list) Dump("ff_labels", ff_list)
在Linux系统中可以使用下面命令来生成头文件"input.h-labels.h"：
$ ./generate-input.h-labels.py kernel-src/include/uapi/linux/input-event-codes.h > input.h-labels.h
generate-input.h-labels.py脚本输入的参数为内核源码的头文件input-event-codes.h，命令运行成功后，最后生成input.h-labels.h头文件在当前目录下，input.h-labels.h文件的内容如下所示：
static struct label input_prop_labels[] = { LABEL(INPUT_PROP_POINTER), LABEL(INPUT_PROP_DIRECT), LABEL(INPUT_PROP_BUTTONPAD), LABEL(INPUT_PROP_SEMI_MT), LABEL(INPUT_PROP_TOPBUTTONPAD), LABEL(INPUT_PROP_POINTING_STICK), LABEL(INPUT_PROP_ACCELEROMETER), LABEL(INPUT_PROP_MAX), LABEL_END, }; static struct label ev_labels[] = { LABEL(EV_SYN), LABEL(EV_KEY), LABEL(EV_REL), LABEL(EV_ABS), LABEL(EV_MSC), LABEL(EV_SW), LABEL(EV_LED), LABEL(EV_SND), LABEL(EV_REP), LABEL(EV_FF), LABEL(EV_PWR), LABEL(EV_FF_STATUS), LABEL(EV_MAX), LABEL_END, }; static struct label syn_labels[] = { LABEL(SYN_REPORT), LABEL(SYN_CONFIG), LABEL(SYN_MT_REPORT), LABEL(SYN_DROPPED), LABEL(SYN_MAX), LABEL_END, }; static struct label key_labels[] = { LABEL(KEY_RESERVED), LABEL(KEY_ESC), LABEL(KEY_1), LABEL(KEY_2), LABEL(KEY_3), LABEL(KEY_4), LABEL(KEY_5), LABEL(KEY_6), LABEL(KEY_7), LABEL(KEY_8), LABEL(KEY_9), LABEL(KEY_0), LABEL(KEY_MINUS), LABEL(KEY_EQUAL), LABEL(KEY_BACKSPACE), LABEL(KEY_TAB), LABEL(KEY_Q), LABEL(KEY_W), LABEL(KEY_E), LABEL(KEY_R), LABEL(KEY_T), LABEL(KEY_Y), LABEL(KEY_U), LABEL(KEY_I), LABEL(KEY_O), LABEL(KEY_P), LABEL(KEY_LEFTBRACE), LABEL(KEY_RIGHTBRACE), LABEL(KEY_ENTER), LABEL(KEY_LEFTCTRL), LABEL(KEY_A), LABEL(KEY_S), LABEL(KEY_D), LABEL(KEY_F), LABEL(KEY_G), LABEL(KEY_H), LABEL(KEY_J), LABEL(KEY_K), LABEL(KEY_L), LABEL(KEY_SEMICOLON), LABEL(KEY_APOSTROPHE), LABEL(KEY_GRAVE), LABEL(KEY_LEFTSHIFT), LABEL(KEY_BACKSLASH), LABEL(KEY_Z), LABEL(KEY_X), LABEL(KEY_C), LABEL(KEY_V), LABEL(KEY_B), LABEL(KEY_N), LABEL(KEY_M), LABEL(KEY_COMMA), LABEL(KEY_DOT), LABEL(KEY_SLASH), LABEL(KEY_RIGHTSHIFT), LABEL(KEY_KPASTERISK), LABEL(KEY_LEFTALT), LABEL(KEY_SPACE), LABEL(KEY_CAPSLOCK), LABEL(KEY_F1), LABEL(KEY_F2), LABEL(KEY_F3), LABEL(KEY_F4), LABEL(KEY_F5), LABEL(KEY_F6), LABEL(KEY_F7), LABEL(KEY_F8), LABEL(KEY_F9), LABEL(KEY_F10), LABEL(KEY_NUMLOCK), LABEL(KEY_SCROLLLOCK), LABEL(KEY_KP7), LABEL(KEY_KP8), LABEL(KEY_KP9), LABEL(KEY_KPMINUS), LABEL(KEY_KP4), LABEL(KEY_KP5), LABEL(KEY_KP6), LABEL(KEY_KPPLUS), LABEL(KEY_KP1), LABEL(KEY_KP2), LABEL(KEY_KP3), LABEL(KEY_KP0), LABEL(KEY_KPDOT), LABEL(KEY_ZENKAKUHANKAKU), LABEL(KEY_102ND), LABEL(KEY_F11), LABEL(KEY_F12), LABEL(KEY_RO), LABEL(KEY_KATAKANA), LABEL(KEY_HIRAGANA), LABEL(KEY_HENKAN), LABEL(KEY_KATAKANAHIRAGANA), LABEL(KEY_MUHENKAN), LABEL(KEY_KPJPCOMMA), LABEL(KEY_KPENTER), LABEL(KEY_RIGHTCTRL), LABEL(KEY_KPSLASH), LABEL(KEY_SYSRQ), LABEL(KEY_RIGHTALT), LABEL(KEY_LINEFEED), LABEL(KEY_HOME), LABEL(KEY_UP), LABEL(KEY_PAGEUP), LABEL(KEY_LEFT), LABEL(KEY_RIGHT), LABEL(KEY_END), LABEL(KEY_DOWN), LABEL(KEY_PAGEDOWN), LABEL(KEY_INSERT), LABEL(KEY_DELETE), LABEL(KEY_MACRO), LABEL(KEY_MUTE), LABEL(KEY_VOLUMEDOWN), LABEL(KEY_VOLUMEUP), LABEL(KEY_POWER), LABEL(KEY_KPEQUAL), LABEL(KEY_KPPLUSMINUS), LABEL(KEY_PAUSE), LABEL(KEY_SCALE), LABEL(KEY_KPCOMMA), LABEL(KEY_HANGEUL), LABEL(KEY_HANJA), LABEL(KEY_YEN), LABEL(KEY_LEFTMETA), LABEL(KEY_RIGHTMETA), LABEL(KEY_COMPOSE), LABEL(KEY_STOP), LABEL(KEY_AGAIN), LABEL(KEY_PROPS), LABEL(KEY_UNDO), LABEL(KEY_FRONT), LABEL(KEY_COPY), LABEL(KEY_OPEN), LABEL(KEY_PASTE), LABEL(KEY_FIND), LABEL(KEY_CUT), LABEL(KEY_HELP), LABEL(KEY_MENU), LABEL(KEY_CALC), LABEL(KEY_SETUP), LABEL(KEY_SLEEP), LABEL(KEY_WAKEUP), LABEL(KEY_FILE), LABEL(KEY_SENDFILE), LABEL(KEY_DELETEFILE), LABEL(KEY_XFER), LABEL(KEY_PROG1), LABEL(KEY_PROG2), LABEL(KEY_WWW), LABEL(KEY_MSDOS), LABEL(KEY_COFFEE), LABEL(KEY_ROTATE_DISPLAY), LABEL(KEY_CYCLEWINDOWS), LABEL(KEY_MAIL), LABEL(KEY_BOOKMARKS), LABEL(KEY_COMPUTER), LABEL(KEY_BACK), LABEL(KEY_FORWARD), LABEL(KEY_CLOSECD), LABEL(KEY_EJECTCD), LABEL(KEY_EJECTCLOSECD), LABEL(KEY_NEXTSONG), LABEL(KEY_PLAYPAUSE), LABEL(KEY_PREVIOUSSONG), LABEL(KEY_STOPCD), LABEL(KEY_RECORD), LABEL(KEY_REWIND), LABEL(KEY_PHONE), LABEL(KEY_ISO), LABEL(KEY_CONFIG), LABEL(KEY_HOMEPAGE), LABEL(KEY_REFRESH), LABEL(KEY_EXIT), LABEL(KEY_MOVE), LABEL(KEY_EDIT), LABEL(KEY_SCROLLUP), LABEL(KEY_SCROLLDOWN), LABEL(KEY_KPLEFTPAREN), LABEL(KEY_KPRIGHTPAREN), LABEL(KEY_NEW), LABEL(KEY_REDO), LABEL(KEY_F13), LABEL(KEY_F14), LABEL(KEY_F15), LABEL(KEY_F16), LABEL(KEY_F17), LABEL(KEY_F18), LABEL(KEY_F19), LABEL(KEY_F20), LABEL(KEY_F21), LABEL(KEY_F22), LABEL(KEY_F23), LABEL(KEY_F24), LABEL(KEY_PLAYCD), LABEL(KEY_PAUSECD), LABEL(KEY_PROG3), LABEL(KEY_PROG4), LABEL(KEY_DASHBOARD), LABEL(KEY_SUSPEND), LABEL(KEY_CLOSE), LABEL(KEY_PLAY), LABEL(KEY_FASTFORWARD), LABEL(KEY_BASSBOOST), LABEL(KEY_PRINT), LABEL(KEY_HP), LABEL(KEY_CAMERA), LABEL(KEY_SOUND), LABEL(KEY_QUESTION), LABEL(KEY_EMAIL), LABEL(KEY_CHAT), LABEL(KEY_SEARCH), LABEL(KEY_CONNECT), LABEL(KEY_FINANCE), LABEL(KEY_SPORT), LABEL(KEY_SHOP), LABEL(KEY_ALTERASE), LABEL(KEY_CANCEL), LABEL(KEY_BRIGHTNESSDOWN), LABEL(KEY_BRIGHTNESSUP), LABEL(KEY_MEDIA), LABEL(KEY_SWITCHVIDEOMODE), LABEL(KEY_KBDILLUMTOGGLE), LABEL(KEY_KBDILLUMDOWN), LABEL(KEY_KBDILLUMUP), LABEL(KEY_SEND), LABEL(KEY_REPLY), LABEL(KEY_FORWARDMAIL), LABEL(KEY_SAVE), LABEL(KEY_DOCUMENTS), LABEL(KEY_BATTERY), LABEL(KEY_BLUETOOTH), LABEL(KEY_WLAN), LABEL(KEY_UWB), LABEL(KEY_UNKNOWN), LABEL(KEY_VIDEO_NEXT), LABEL(KEY_VIDEO_PREV), LABEL(KEY_BRIGHTNESS_CYCLE), LABEL(KEY_BRIGHTNESS_AUTO), LABEL(KEY_DISPLAY_OFF), LABEL(KEY_WWAN), LABEL(KEY_RFKILL), LABEL(KEY_MICMUTE), LABEL(BTN_MISC), LABEL(BTN_0), LABEL(BTN_1), LABEL(BTN_2), LABEL(BTN_3), LABEL(BTN_4), LABEL(BTN_5), LABEL(BTN_6), LABEL(BTN_7), LABEL(BTN_8), LABEL(BTN_9), LABEL(BTN_MOUSE), LABEL(BTN_LEFT), LABEL(BTN_RIGHT), LABEL(BTN_MIDDLE), LABEL(BTN_SIDE), LABEL(BTN_EXTRA), LABEL(BTN_FORWARD), LABEL(BTN_BACK), LABEL(BTN_TASK), LABEL(BTN_JOYSTICK), LABEL(BTN_TRIGGER), LABEL(BTN_THUMB), LABEL(BTN_THUMB2), LABEL(BTN_TOP), LABEL(BTN_TOP2), LABEL(BTN_PINKIE), LABEL(BTN_BASE), LABEL(BTN_BASE2), LABEL(BTN_BASE3), LABEL(BTN_BASE4), LABEL(BTN_BASE5), LABEL(BTN_BASE6), LABEL(BTN_DEAD), LABEL(BTN_GAMEPAD), LABEL(BTN_SOUTH), LABEL(BTN_EAST), LABEL(BTN_C), LABEL(BTN_NORTH), LABEL(BTN_WEST), LABEL(BTN_Z), LABEL(BTN_TL), LABEL(BTN_TR), LABEL(BTN_TL2), LABEL(BTN_TR2), LABEL(BTN_SELECT), LABEL(BTN_START), LABEL(BTN_MODE), LABEL(BTN_THUMBL), LABEL(BTN_THUMBR), LABEL(BTN_DIGI), LABEL(BTN_TOOL_PEN), LABEL(BTN_TOOL_RUBBER), LABEL(BTN_TOOL_BRUSH), LABEL(BTN_TOOL_PENCIL), LABEL(BTN_TOOL_AIRBRUSH), LABEL(BTN_TOOL_FINGER), LABEL(BTN_TOOL_MOUSE), LABEL(BTN_TOOL_LENS), LABEL(BTN_TOOL_QUINTTAP), LABEL(BTN_TOUCH), LABEL(BTN_STYLUS), LABEL(BTN_STYLUS2), LABEL(BTN_TOOL_DOUBLETAP), LABEL(BTN_TOOL_TRIPLETAP), LABEL(BTN_TOOL_QUADTAP), LABEL(BTN_WHEEL), LABEL(BTN_GEAR_DOWN), LABEL(BTN_GEAR_UP), LABEL(KEY_OK), LABEL(KEY_SELECT), LABEL(KEY_GOTO), LABEL(KEY_CLEAR), LABEL(KEY_POWER2), LABEL(KEY_OPTION), LABEL(KEY_INFO), LABEL(KEY_TIME), LABEL(KEY_VENDOR), LABEL(KEY_ARCHIVE), LABEL(KEY_PROGRAM), LABEL(KEY_CHANNEL), LABEL(KEY_FAVORITES), LABEL(KEY_EPG), LABEL(KEY_PVR), LABEL(KEY_MHP), LABEL(KEY_LANGUAGE), LABEL(KEY_TITLE), LABEL(KEY_SUBTITLE), LABEL(KEY_ANGLE), LABEL(KEY_ZOOM), LABEL(KEY_MODE), LABEL(KEY_KEYBOARD), LABEL(KEY_SCREEN), LABEL(KEY_PC), LABEL(KEY_TV), LABEL(KEY_TV2), LABEL(KEY_VCR), LABEL(KEY_VCR2), LABEL(KEY_SAT), LABEL(KEY_SAT2), LABEL(KEY_CD), LABEL(KEY_TAPE), LABEL(KEY_RADIO), LABEL(KEY_TUNER), LABEL(KEY_PLAYER), LABEL(KEY_TEXT), LABEL(KEY_DVD), LABEL(KEY_AUX), LABEL(KEY_MP3), LABEL(KEY_AUDIO), LABEL(KEY_VIDEO), LABEL(KEY_DIRECTORY), LABEL(KEY_LIST), LABEL(KEY_MEMO), LABEL(KEY_CALENDAR), LABEL(KEY_RED), LABEL(KEY_GREEN), LABEL(KEY_YELLOW), LABEL(KEY_BLUE), LABEL(KEY_CHANNELUP), LABEL(KEY_CHANNELDOWN), LABEL(KEY_FIRST), LABEL(KEY_LAST), LABEL(KEY_AB), LABEL(KEY_NEXT), LABEL(KEY_RESTART), LABEL(KEY_SLOW), LABEL(KEY_SHUFFLE), LABEL(KEY_BREAK), LABEL(KEY_PREVIOUS), LABEL(KEY_DIGITS), LABEL(KEY_TEEN), LABEL(KEY_TWEN), LABEL(KEY_VIDEOPHONE), LABEL(KEY_GAMES), LABEL(KEY_ZOOMIN), LABEL(KEY_ZOOMOUT), LABEL(KEY_ZOOMRESET), LABEL(KEY_WORDPROCESSOR), LABEL(KEY_EDITOR), LABEL(KEY_SPREADSHEET), LABEL(KEY_GRAPHICSEDITOR), LABEL(KEY_PRESENTATION), LABEL(KEY_DATABASE), LABEL(KEY_NEWS), LABEL(KEY_VOICEMAIL), LABEL(KEY_ADDRESSBOOK), LABEL(KEY_MESSENGER), LABEL(KEY_DISPLAYTOGGLE), LABEL(KEY_SPELLCHECK), LABEL(KEY_LOGOFF), LABEL(KEY_DOLLAR), LABEL(KEY_EURO), LABEL(KEY_FRAMEBACK), LABEL(KEY_FRAMEFORWARD), LABEL(KEY_CONTEXT_MENU), LABEL(KEY_MEDIA_REPEAT), LABEL(KEY_10CHANNELSUP), LABEL(KEY_10CHANNELSDOWN), LABEL(KEY_IMAGES), LABEL(KEY_DEL_EOL), LABEL(KEY_DEL_EOS), LABEL(KEY_INS_LINE), LABEL(KEY_DEL_LINE), LABEL(KEY_FN), LABEL(KEY_FN_ESC), LABEL(KEY_FN_F1), LABEL(KEY_FN_F2), LABEL(KEY_FN_F3), LABEL(KEY_FN_F4), LABEL(KEY_FN_F5), LABEL(KEY_FN_F6), LABEL(KEY_FN_F7), LABEL(KEY_FN_F8), LABEL(KEY_FN_F9), LABEL(KEY_FN_F10), LABEL(KEY_FN_F11), LABEL(KEY_FN_F12), LABEL(KEY_FN_1), LABEL(KEY_FN_2), LABEL(KEY_FN_D), LABEL(KEY_FN_E), LABEL(KEY_FN_F), LABEL(KEY_FN_S), LABEL(KEY_FN_B), LABEL(KEY_BRL_DOT1), LABEL(KEY_BRL_DOT2), LABEL(KEY_BRL_DOT3), LABEL(KEY_BRL_DOT4), LABEL(KEY_BRL_DOT5), LABEL(KEY_BRL_DOT6), LABEL(KEY_BRL_DOT7), LABEL(KEY_BRL_DOT8), LABEL(KEY_BRL_DOT9), LABEL(KEY_BRL_DOT10), LABEL(KEY_NUMERIC_0), LABEL(KEY_NUMERIC_1), LABEL(KEY_NUMERIC_2), LABEL(KEY_NUMERIC_3), LABEL(KEY_NUMERIC_4), LABEL(KEY_NUMERIC_5), LABEL(KEY_NUMERIC_6), LABEL(KEY_NUMERIC_7), LABEL(KEY_NUMERIC_8), LABEL(KEY_NUMERIC_9), LABEL(KEY_NUMERIC_STAR), LABEL(KEY_NUMERIC_POUND), LABEL(KEY_NUMERIC_A), LABEL(KEY_NUMERIC_B), LABEL(KEY_NUMERIC_C), LABEL(KEY_NUMERIC_D), LABEL(KEY_CAMERA_FOCUS), LABEL(KEY_WPS_BUTTON), LABEL(KEY_TOUCHPAD_TOGGLE), LABEL(KEY_TOUCHPAD_ON), LABEL(KEY_TOUCHPAD_OFF), LABEL(KEY_CAMERA_ZOOMIN), LABEL(KEY_CAMERA_ZOOMOUT), LABEL(KEY_CAMERA_UP), LABEL(KEY_CAMERA_DOWN), LABEL(KEY_CAMERA_LEFT), LABEL(KEY_CAMERA_RIGHT), LABEL(KEY_ATTENDANT_ON), LABEL(KEY_ATTENDANT_OFF), LABEL(KEY_ATTENDANT_TOGGLE), LABEL(KEY_LIGHTS_TOGGLE), LABEL(BTN_DPAD_UP), LABEL(BTN_DPAD_DOWN), LABEL(BTN_DPAD_LEFT), LABEL(BTN_DPAD_RIGHT), LABEL(KEY_ALS_TOGGLE), LABEL(KEY_BUTTONCONFIG), LABEL(KEY_TASKMANAGER), LABEL(KEY_JOURNAL), LABEL(KEY_CONTROLPANEL), LABEL(KEY_APPSELECT), LABEL(KEY_SCREENSAVER), LABEL(KEY_VOICECOMMAND), LABEL(KEY_BRIGHTNESS_MIN), LABEL(KEY_BRIGHTNESS_MAX), LABEL(KEY_KBDINPUTASSIST_PREV), LABEL(KEY_KBDINPUTASSIST_NEXT), LABEL(KEY_KBDINPUTASSIST_PREVGROUP), LABEL(KEY_KBDINPUTASSIST_NEXTGROUP), LABEL(KEY_KBDINPUTASSIST_ACCEPT), LABEL(KEY_KBDINPUTASSIST_CANCEL), LABEL(BTN_TRIGGER_HAPPY), LABEL(BTN_TRIGGER_HAPPY1), LABEL(BTN_TRIGGER_HAPPY2), LABEL(BTN_TRIGGER_HAPPY3), LABEL(BTN_TRIGGER_HAPPY4), LABEL(BTN_TRIGGER_HAPPY5), LABEL(BTN_TRIGGER_HAPPY6), LABEL(BTN_TRIGGER_HAPPY7), LABEL(BTN_TRIGGER_HAPPY8), LABEL(BTN_TRIGGER_HAPPY9), LABEL(BTN_TRIGGER_HAPPY10), LABEL(BTN_TRIGGER_HAPPY11), LABEL(BTN_TRIGGER_HAPPY12), LABEL(BTN_TRIGGER_HAPPY13), LABEL(BTN_TRIGGER_HAPPY14), LABEL(BTN_TRIGGER_HAPPY15), LABEL(BTN_TRIGGER_HAPPY16), LABEL(BTN_TRIGGER_HAPPY17), LABEL(BTN_TRIGGER_HAPPY18), LABEL(BTN_TRIGGER_HAPPY19), LABEL(BTN_TRIGGER_HAPPY20), LABEL(BTN_TRIGGER_HAPPY21), LABEL(BTN_TRIGGER_HAPPY22), LABEL(BTN_TRIGGER_HAPPY23), LABEL(BTN_TRIGGER_HAPPY24), LABEL(BTN_TRIGGER_HAPPY25), LABEL(BTN_TRIGGER_HAPPY26), LABEL(BTN_TRIGGER_HAPPY27), LABEL(BTN_TRIGGER_HAPPY28), LABEL(BTN_TRIGGER_HAPPY29), LABEL(BTN_TRIGGER_HAPPY30), LABEL(BTN_TRIGGER_HAPPY31), LABEL(BTN_TRIGGER_HAPPY32), LABEL(BTN_TRIGGER_HAPPY33), LABEL(BTN_TRIGGER_HAPPY34), LABEL(BTN_TRIGGER_HAPPY35), LABEL(BTN_TRIGGER_HAPPY36), LABEL(BTN_TRIGGER_HAPPY37), LABEL(BTN_TRIGGER_HAPPY38), LABEL(BTN_TRIGGER_HAPPY39), LABEL(BTN_TRIGGER_HAPPY40), LABEL(KEY_MAX), LABEL_END, }; static struct label rel_labels[] = { LABEL(REL_X), LABEL(REL_Y), LABEL(REL_Z), LABEL(REL_RX), LABEL(REL_RY), LABEL(REL_RZ), LABEL(REL_HWHEEL), LABEL(REL_DIAL), LABEL(REL_WHEEL), LABEL(REL_MISC), LABEL(REL_MAX), LABEL_END, }; static struct label abs_labels[] = { LABEL(ABS_X), LABEL(ABS_Y), LABEL(ABS_Z), LABEL(ABS_RX), LABEL(ABS_RY), LABEL(ABS_RZ), LABEL(ABS_THROTTLE), LABEL(ABS_RUDDER), LABEL(ABS_WHEEL), LABEL(ABS_GAS), LABEL(ABS_BRAKE), LABEL(ABS_HAT0X), LABEL(ABS_HAT0Y), LABEL(ABS_HAT1X), LABEL(ABS_HAT1Y), LABEL(ABS_HAT2X), LABEL(ABS_HAT2Y), LABEL(ABS_HAT3X), LABEL(ABS_HAT3Y), LABEL(ABS_PRESSURE), LABEL(ABS_DISTANCE), LABEL(ABS_TILT_X), LABEL(ABS_TILT_Y), LABEL(ABS_TOOL_WIDTH), LABEL(ABS_VOLUME), LABEL(ABS_MISC), LABEL(ABS_RESERVED), LABEL(ABS_MT_SLOT), LABEL(ABS_MT_TOUCH_MAJOR), LABEL(ABS_MT_TOUCH_MINOR), LABEL(ABS_MT_WIDTH_MAJOR), LABEL(ABS_MT_WIDTH_MINOR), LABEL(ABS_MT_ORIENTATION), LABEL(ABS_MT_POSITION_X), LABEL(ABS_MT_POSITION_Y), LABEL(ABS_MT_TOOL_TYPE), LABEL(ABS_MT_BLOB_ID), LABEL(ABS_MT_TRACKING_ID), LABEL(ABS_MT_PRESSURE), LABEL(ABS_MT_DISTANCE), LABEL(ABS_MT_TOOL_X), LABEL(ABS_MT_TOOL_Y), LABEL(ABS_MAX), LABEL_END, }; static struct label sw_labels[] = { LABEL(SW_LID), LABEL(SW_TABLET_MODE), LABEL(SW_HEADPHONE_INSERT), LABEL(SW_RFKILL_ALL), LABEL(SW_MICROPHONE_INSERT), LABEL(SW_DOCK), LABEL(SW_LINEOUT_INSERT), LABEL(SW_JACK_PHYSICAL_INSERT), LABEL(SW_VIDEOOUT_INSERT), LABEL(SW_CAMERA_LENS_COVER), LABEL(SW_KEYPAD_SLIDE), LABEL(SW_FRONT_PROXIMITY), LABEL(SW_ROTATE_LOCK), LABEL(SW_LINEIN_INSERT), LABEL(SW_MUTE_DEVICE), LABEL(SW_MAX), LABEL_END, }; static struct label msc_labels[] = { LABEL(MSC_SERIAL), LABEL(MSC_PULSELED), LABEL(MSC_GESTURE), LABEL(MSC_RAW), LABEL(MSC_SCAN), LABEL(MSC_TIMESTAMP), LABEL(MSC_MAX), LABEL_END, }; static struct label led_labels[] = { LABEL(LED_NUML), LABEL(LED_CAPSL), LABEL(LED_SCROLLL), LABEL(LED_COMPOSE), LABEL(LED_KANA), LABEL(LED_SLEEP), LABEL(LED_SUSPEND), LABEL(LED_MUTE), LABEL(LED_MISC), LABEL(LED_MAIL), LABEL(LED_CHARGING), LABEL(LED_MAX), LABEL_END, }; static struct label rep_labels[] = { LABEL(REP_DELAY), LABEL(REP_PERIOD), LABEL(REP_MAX), LABEL_END, }; static struct label snd_labels[] = { LABEL(SND_CLICK), LABEL(SND_BELL), LABEL(SND_TONE), LABEL(SND_MAX), LABEL_END, }; static struct label mt_tool_labels[] = { LABEL_END, }; static struct label ff_status_labels[] = { LABEL_END, }; static struct label ff_labels[] = { LABEL_END, };
到这里，需要移植的getevent工具的源码就准备好了。
3、交叉编译测试
在上面已经准备好了getevent工具的源码了，接下来，需要新创建Makefile脚本进行交叉编译：
$ cd getevent
$ touch Makefile
Makefile脚本需要指定交叉编译工具链，如下所示：
CROSS_COMPILE ?= arm-himix200-linux- TARGET ?= getevent CC := $(CROSS_COMPILE)gcc SRCFILES := getevent.c .PHONY: clean all: $(CC) $(SRCFILES) -o $(TARGET) clean: rm -rf $(TARGET)
使用下面命令交叉编译生成getevent工具：
$ make
将getevent工具移动到目标板上，并运行测试：
# getevent -lt
当前目标板的触摸屏上报事件效果如下：
可以看到，getevent工具能正常在嵌入式Linux系统上运行了。
4、小结
本文给出了如何移植Android工具getevent到嵌入式Linux系统的基本过程，并给出了相关的getevent工具测试源码。
