To do so, a few dependencies have been imported: * external/bsd/lutok * external/mit/lua * external/public-domain/sqlite * external/public-domain/xz The Kyua framework is the new generation of ATF (Automated Test Framework), it is composed of: * external/bsd/atf * external/bsd/kyua-atf-compat * external/bsd/kyua-cli * external/bsd/kyua-tester * tests Kyua/ATF being written in C++, it depends on libstdc++ which is provided by GCC. As this is not part of the sources, Kyua is only compiled when the native GCC utils are installed. To install Kyua do the following: * In a cross-build enviromnent, add the following to the build.sh commandline: -V MKBINUTILS=yes -V MKGCCCMDS=yes WARNING: At this point the import is still experimental, and not supported on native builds (a.k.a make build). Change-Id: I26aee23c5bbd2d64adcb7c1beb98fe0d479d7ada
316 lines
7.2 KiB
C
316 lines
7.2 KiB
C
/* $NetBSD: gpio.c,v 1.7 2012/03/15 02:02:21 joerg Exp $ */
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/*
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* Copyright (c) 2011 Marc Balmer <marc@msys.ch>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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/* GPIO interface for Lua */
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#include <errno.h>
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#include <fcntl.h>
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#include <stdarg.h>
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#include <stdio.h>
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#include <string.h>
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#include <ctype.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <lua.h>
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#include <lauxlib.h>
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#include <lualib.h>
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#include <sys/gpio.h>
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#include <sys/ioctl.h>
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#define GPIO_METATABLE "GPIO object methods"
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static __printflike(2, 3) void
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gpio_error(lua_State *L, const char *fmt, ...)
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{
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va_list ap;
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int len;
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char *msg;
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va_start(ap, fmt);
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len = vasprintf(&msg, fmt, ap);
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va_end(ap);
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if (len != -1) {
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lua_pushstring(L, msg);
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free(msg);
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} else
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lua_pushstring(L, "vasprintf failed");
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lua_error(L);
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}
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static int
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gpio_open(lua_State *L)
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{
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int *fd;
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fd = lua_newuserdata(L, sizeof(int));
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*fd = open(luaL_checkstring(L, -2), O_RDWR);
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if (*fd == -1) {
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gpio_error(L, "%s", strerror(errno));
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/* NOTREACHED */
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return 0;
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}
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luaL_getmetatable(L, GPIO_METATABLE);
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lua_setmetatable(L, -2);
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return 1;
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}
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static int
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gpio_close(lua_State *L)
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{
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int *fd;
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fd = luaL_checkudata(L, 1, GPIO_METATABLE);
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if (*fd != -1) {
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close(*fd);
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*fd = -1;
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}
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return 0;
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}
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static int
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gpio_info(lua_State *L)
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{
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struct gpio_info info;
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int *fd;
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fd = luaL_checkudata(L, 1, GPIO_METATABLE);
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if (ioctl(*fd, GPIOINFO, &info) == -1)
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gpio_error(L, "GPIOINFO");
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lua_pushinteger(L, info.gpio_npins);
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return 1;
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}
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static void
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gpio_get_pin(lua_State *L, int n, struct gpio_req *req)
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{
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switch (lua_type(L, n)) {
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case LUA_TNUMBER:
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req->gp_pin = (int)lua_tointeger(L, n); /* not 1 based! */
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break;
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case LUA_TSTRING:
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strlcpy(req->gp_name, lua_tostring(L, n), sizeof(req->gp_name));
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break;
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default:
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luaL_argerror(L, n, "expected string or integer");
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/* NOTREACHED */
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}
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}
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static int
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gpio_set(lua_State *L)
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{
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struct gpio_set set;
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int *fd;
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fd = luaL_checkudata(L, 1, GPIO_METATABLE);
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memset(&set, 0, sizeof(set));
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gpio_get_pin(L, 2, (void *)&set);
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set.gp_flags = (int)luaL_checkinteger(L, 3);
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if (ioctl(*fd, GPIOSET, &set) == -1)
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gpio_error(L, "GPIOSET");
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return 0;
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}
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static int
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gpio_unset(lua_State *L)
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{
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struct gpio_set set;
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int *fd;
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fd = luaL_checkudata(L, 1, GPIO_METATABLE);
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memset(&set, 0, sizeof(set));
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gpio_get_pin(L, 2, (void *)&set);
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if (ioctl(*fd, GPIOUNSET, &set) == -1)
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gpio_error(L, "GPIOUNSET");
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return 0;
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}
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static int
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gpio_read(lua_State *L)
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{
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struct gpio_req req;
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int *fd;
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fd = luaL_checkudata(L, 1, GPIO_METATABLE);
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memset(&req, 0, sizeof(req));
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gpio_get_pin(L, 2, &req);
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if (ioctl(*fd, GPIOREAD, &req) == -1)
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gpio_error(L, "GPIOREAD");
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lua_pushinteger(L, req.gp_value);
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return 1;
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}
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static int
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gpio_write(lua_State *L)
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{
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struct gpio_req req;
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int *fd, val;
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fd = luaL_checkudata(L, 1, GPIO_METATABLE);
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val = (int)luaL_checkinteger(L, 3);
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if (val != GPIO_PIN_HIGH && val != GPIO_PIN_LOW)
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gpio_error(L, "%d: invalid value", val);
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memset(&req, 0, sizeof(req));
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gpio_get_pin(L, 2, &req);
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req.gp_value = val;
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if (ioctl(*fd, GPIOWRITE, &req) == -1)
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gpio_error(L, "GPIOWRITE");
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lua_pushinteger(L, req.gp_value);
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return 1;
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}
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static int
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gpio_toggle(lua_State *L)
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{
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struct gpio_req req;
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int *fd;
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fd = luaL_checkudata(L, 1, GPIO_METATABLE);
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memset(&req, 0, sizeof(req));
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gpio_get_pin(L, 2, &req);
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if (ioctl(*fd, GPIOTOGGLE, &req) == -1)
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gpio_error(L, "GPIOTOGGLE");
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lua_pushinteger(L, req.gp_value);
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return 1;
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}
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static int
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gpio_attach(lua_State *L)
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{
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struct gpio_attach attach;
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int *fd;
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fd = luaL_checkudata(L, 1, GPIO_METATABLE);
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memset(&attach, 0, sizeof(attach));
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strlcpy(attach.ga_dvname, luaL_checkstring(L, 2),
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sizeof(attach.ga_dvname));
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attach.ga_offset = (int)luaL_checkinteger(L, 3);
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attach.ga_mask = (int)luaL_checkinteger(L, 4);
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if (lua_gettop(L) > 4)
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attach.ga_flags = (int)luaL_checkinteger(L, 5);
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else
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attach.ga_flags = 0;
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if (ioctl(*fd, GPIOATTACH, &attach) == -1)
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gpio_error(L, "GPIOATTACH");
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return 0;
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}
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struct constant {
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const char *name;
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int value;
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};
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static const struct constant gpio_constant[] = {
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/* GPIO pin states */
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{ "PIN_LOW", GPIO_PIN_LOW },
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{ "PIN_HIGH", GPIO_PIN_HIGH },
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/* GPIO pin configuration flags */
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{ "PIN_INPUT", GPIO_PIN_INPUT },
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{ "PIN_OUTPUT", GPIO_PIN_OUTPUT },
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{ "PIN_INOUT", GPIO_PIN_INOUT },
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{ "PIN_OPENDRAIN", GPIO_PIN_OPENDRAIN },
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{ "PIN_PUSHPULL", GPIO_PIN_PUSHPULL },
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{ "PIN_TRISTATE", GPIO_PIN_TRISTATE },
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{ "PIN_PULLUP", GPIO_PIN_PULLUP },
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{ "PIN_PULLDOWN", GPIO_PIN_PULLDOWN },
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{ "PIN_INVIN", GPIO_PIN_INVIN },
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{ "PIN_INVOUT", GPIO_PIN_INVOUT },
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{ "PIN_USER", GPIO_PIN_USER },
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{ "PIN_PULSATE", GPIO_PIN_PULSATE },
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{ "PIN_SET", GPIO_PIN_SET },
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{ NULL, 0 }
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};
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static void
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gpio_set_info(lua_State *L)
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{
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lua_pushliteral(L, "_COPYRIGHT");
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lua_pushliteral(L, "Copyright (C) 2011 Marc Balmer <marc@msys.ch>");
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lua_settable(L, -3);
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lua_pushliteral(L, "_DESCRIPTION");
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lua_pushliteral(L, "GPIO interface for Lua");
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lua_settable(L, -3);
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lua_pushliteral(L, "_VERSION");
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lua_pushliteral(L, "gpio 1.0.1");
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lua_settable(L, -3);
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}
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int luaopen_gpio(lua_State*);
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int
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luaopen_gpio(lua_State* L)
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{
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static const struct luaL_Reg methods[] = {
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{ "open", gpio_open },
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{ NULL, NULL }
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};
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static const struct luaL_Reg gpio_methods[] = {
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{ "info", gpio_info },
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{ "close", gpio_close },
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{ "set", gpio_set },
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{ "unset", gpio_unset },
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{ "read", gpio_read },
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{ "write", gpio_write },
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{ "toggle", gpio_toggle },
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{ "attach", gpio_attach },
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{ NULL, NULL }
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};
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int n;
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luaL_register(L, "gpio", methods);
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gpio_set_info(L);
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/* The gpio metatable */
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if (luaL_newmetatable(L, GPIO_METATABLE)) {
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luaL_register(L, NULL, gpio_methods);
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lua_pushliteral(L, "__gc");
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lua_pushcfunction(L, gpio_close);
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lua_settable(L, -3);
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lua_pushliteral(L, "__index");
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lua_pushvalue(L, -2);
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lua_settable(L, -3);
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lua_pushliteral(L, "__metatable");
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lua_pushliteral(L, "must not access this metatable");
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lua_settable(L, -3);
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}
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lua_pop(L, 1);
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for (n = 0; gpio_constant[n].name != NULL; n++) {
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lua_pushinteger(L, gpio_constant[n].value);
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lua_setfield(L, -2, gpio_constant[n].name);
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};
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return 1;
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}
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