/* * gpio-hammer - example swiss army knife to shake GPIO lines on a system * * Copyright (C) 2016 Linus Walleij * * This program is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 as published by * the Free Software Foundation. * * Usage: * gpio-hammer -n -o -o */ #include #include #include #include #include #include #include #include #include #include #include #include #include "gpio-utils.h" int hammer_device(const char *device_name, unsigned int *lines, int nlines, unsigned int loops) { struct gpiohandle_data data; char swirr[] = "-\\|/"; int fd; int ret; int i, j; unsigned int iteration = 0; memset(&data.values, 0, sizeof(data.values)); ret = gpiotools_request_linehandle(device_name, lines, nlines, GPIOHANDLE_REQUEST_OUTPUT, &data, "gpio-hammler"); if (ret < 0) goto exit_error; else fd = ret; ret = gpiotools_get_values(fd, &data); if (ret < 0) goto exit_close_error; fprintf(stdout, "Hammer lines ["); for (i = 0; i < nlines; i++) { fprintf(stdout, "%d", lines[i]); if (i != (nlines - 1)) fprintf(stdout, ", "); } fprintf(stdout, "] on %s, initial states: [", device_name); for (i = 0; i < nlines; i++) { fprintf(stdout, "%d", data.values[i]); if (i != (nlines - 1)) fprintf(stdout, ", "); } fprintf(stdout, "]\n"); /* Hammertime! */ j = 0; while (1) { /* Invert all lines so we blink */ for (i = 0; i < nlines; i++) data.values[i] = !data.values[i]; ret = gpiotools_set_values(fd, &data); if (ret < 0) goto exit_close_error; /* Re-read values to get status */ ret = gpiotools_get_values(fd, &data); if (ret < 0) goto exit_close_error; fprintf(stdout, "[%c] ", swirr[j]); j++; if (j == sizeof(swirr)-1) j = 0; fprintf(stdout, "["); for (i = 0; i < nlines; i++) { fprintf(stdout, "%d: %d", lines[i], data.values[i]); if (i != (nlines - 1)) fprintf(stdout, ", "); } fprintf(stdout, "]\r"); fflush(stdout); sleep(1); iteration++; if (loops && iteration == loops) break; } fprintf(stdout, "\n"); ret = 0; exit_close_error: gpiotools_release_linehandle(fd); exit_error: return ret; } void print_usage(void) { fprintf(stderr, "Usage: gpio-hammer [options]...\n" "Hammer GPIO lines, 0->1->0->1...\n" " -n Hammer GPIOs on a named device (must be stated)\n" " -o Offset[s] to hammer, at least one, several can be stated\n" " [-c ] Do loops (optional, infinite loop if not stated)\n" " -? This helptext\n" "\n" "Example:\n" "gpio-hammer -n gpiochip0 -o 4\n" ); } int main(int argc, char **argv) { const char *device_name = NULL; unsigned int lines[GPIOHANDLES_MAX]; unsigned int loops = 0; int nlines; int c; int i; i = 0; while ((c = getopt(argc, argv, "c:n:o:?")) != -1) { switch (c) { case 'c': loops = strtoul(optarg, NULL, 10); break; case 'n': device_name = optarg; break; case 'o': lines[i] = strtoul(optarg, NULL, 10); i++; break; case '?': print_usage(); return -1; } } nlines = i; if (!device_name || !nlines) { print_usage(); return -1; } return hammer_device(device_name, lines, nlines, loops); } er'>ModeNameSize -rw-r--r--Build5870log plain -rwxr-xr-xPERF-VERSION-GEN1010log plain -rw-r--r--alias.c1471log plain -rw-r--r--annotate.c44411log plain -rw-r--r--annotate.h5583log plain -rw-r--r--auxtrace.c47774log plain -rw-r--r--auxtrace.h22142log plain -rw-r--r--block-range.c6948log plain -rw-r--r--block-range.h1607log plain -rw-r--r--bpf-loader.c40787log plain -rw-r--r--bpf-loader.h6215log plain -rw-r--r--bpf-prologue.c11226log plain -rw-r--r--bpf-prologue.h847log plain -rw-r--r--build-id.c19054log plain -rw-r--r--build-id.h1859log plain d---------c++184log plain -rw-r--r--cache.h733log plain -rw-r--r--call-path.c2893log plain -rw-r--r--call-path.h2203log plain -rw-r--r--callchain.c29332log plain -rw-r--r--callchain.h7881log plain -rw-r--r--cgroup.c3195log plain -rw-r--r--cgroup.h359log plain -rw-r--r--cloexec.c1950log plain -rw-r--r--cloexec.h251log plain -rw-r--r--color.c4787log plain -rw-r--r--color.h1647log plain -rw-r--r--comm.c2239log plain -rw-r--r--comm.h561log plain -rw-r--r--config.c16262log plain -rw-r--r--config.h2113log plain -rw-r--r--counts.c1026log plain -rw-r--r--counts.h790log plain -rw-r--r--cpumap.c12627log plain -rw-r--r--cpumap.h1954log plain -rw-r--r--cs-etm.h2061log plain -rw-r--r--ctype.c2018log plain -rw-r--r--data-convert-bt.c36671log plain -rw-r--r--data-convert-bt.h302log plain -rw-r--r--data-convert.h141log plain -rw-r--r--data.c3459log plain -rw-r--r--data.h1369log plain -rw-r--r--db-export.c11434log plain -rw-r--r--db-export.h3816log plain -rw-r--r--debug.c4417log plain -rw-r--r--debug.h2023log plain -rw-r--r--demangle-java.c4219log plain -rw-r--r--demangle-java.h249log plain -rw-r--r--demangle-rust.c6602log plain -rw-r--r--demangle-rust.h170log plain -rw-r--r--drv_configs.c1834log plain -rw-r--r--drv_configs.h844log plain -rw-r--r--dso.c31994log plain -rw-r--r--dso.h10399log plain -rw-r--r--dwarf-aux.c33828log plain -rw-r--r--dwarf-aux.h5101log plain -rw-r--r--dwarf-regs.c1816log plain -rw-r--r--env.c1884log plain -rw-r--r--env.h1268log plain -rw-r--r--event.c36670log plain -rw-r--r--event.h15997log plain -rw-r--r--evlist.c47104log plain -rw-r--r--evlist.h12584log plain -rw-r--r--evsel.c63917log plain -rw-r--r--evsel.h13041log plain -rw-r--r--evsel_fprintf.c5831log plain -rw-r--r--find-vdso-map.c581log plain -rw-r--r--genelf.c11653log plain -rw-r--r--genelf.h1814log plain -rw-r--r--genelf_debug.c14374log plain -rwxr-xr-xgenerate-cmdlist.sh1141log plain -rw-r--r--group.h122log plain -rw-r--r--header.c73410log plain -rw-r--r--header.h4365log plain -rw-r--r--help-unknown-cmd.c3221log plain