From f4de6d5292e305e2729687e345f5c2d97121652d Mon Sep 17 00:00:00 2001 From: Nicolas Schodet Date: Tue, 27 Mar 2012 01:01:19 +0200 Subject: digital/io-hub: add output support --- digital/io-hub/src/common/output.host.c | 73 +++++++++++++++++++++++++++++++++ 1 file changed, 73 insertions(+) create mode 100644 digital/io-hub/src/common/output.host.c (limited to 'digital/io-hub/src/common/output.host.c') diff --git a/digital/io-hub/src/common/output.host.c b/digital/io-hub/src/common/output.host.c new file mode 100644 index 00000000..5c2d7080 --- /dev/null +++ b/digital/io-hub/src/common/output.host.c @@ -0,0 +1,73 @@ +/* output.host.c */ +/* io-hub - Modular Input/Output. {{{ + * + * Copyright (C) 2012 Nicolas Schodet + * + * APBTeam: + * Web: http://apbteam.org/ + * Email: team AT apbteam DOT org + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. + * + * }}} */ +#include "common.h" +#include "output.h" + +#include "modules/host/host.h" +#include "modules/host/mex.h" + +/** Output context. */ +struct output_t +{ + /** Previous sent state. */ + uint32_t previous; + /** Message type. */ + uint8_t mtype; +}; + +/** Global context. */ +struct output_t output_global; +#define ctx output_global + +void +output_host_init (void) +{ + const char *mex_instance = host_get_instance ("io-hub0", 0); + ctx.mtype = mex_node_reservef ("%s:output", mex_instance); + ctx.previous = (uint32_t) -1; +} + +void +output_host_update (void) +{ + uint32_t new = 0, bit = 1; + /* Collect all output states. */ +#define OUTPUT(io, init) do { \ + if (IO_PORT_ (io) & IO_BV_ (io)) \ + new |= bit; \ + bit <<= 1; \ +} while (0); // <- do not copy this code unless you know why! + OUTPUT_LIST +#undef OUTPUT + /* If changed, sent it. */ + if (ctx.previous != new) + { + mex_msg_t *m = mex_msg_new (ctx.mtype); + mex_msg_push (m, "L", new); + mex_node_send (m); + ctx.previous = new; + } +} + -- cgit v1.2.3