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authorNicolas Schodet2013-03-26 20:55:36 +0100
committerNicolas Schodet2013-03-26 21:03:14 +0100
commitd691fdbb4816d5dc68b53437d7a915ca0c487322 (patch)
tree1e61b01d6e1cdbbf053fa0edde0f81e351f69434 /digital/ucoolib/ucoolib/hal/adc/adc.host.cc
parent9ee19a4d7c2abfcf73001c391687250961597337 (diff)
digital/ucoolib/ucoolib: add ADC driver
Diffstat (limited to 'digital/ucoolib/ucoolib/hal/adc/adc.host.cc')
-rw-r--r--digital/ucoolib/ucoolib/hal/adc/adc.host.cc92
1 files changed, 92 insertions, 0 deletions
diff --git a/digital/ucoolib/ucoolib/hal/adc/adc.host.cc b/digital/ucoolib/ucoolib/hal/adc/adc.host.cc
new file mode 100644
index 00000000..d6aa2695
--- /dev/null
+++ b/digital/ucoolib/ucoolib/hal/adc/adc.host.cc
@@ -0,0 +1,92 @@
+// ucoolib - Microcontroller object oriented library. {{{
+//
+// Copyright (C) 2013 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 "adc.host.hh"
+
+#include <string>
+
+namespace ucoo {
+
+/// Shared context between instances.
+class AdcHostShared
+{
+ public:
+ /// Constructor, connect to mex node.
+ AdcHostShared (Host &host);
+ /// Register a new instance.
+ void register_instance (Host &host, AdcHost &instance, const char *name);
+ private:
+ /// Handle value from Mex.
+ void handle_adc_channel (mex::Msg &msg);
+ private:
+ Host &host_;
+ typedef std::map<std::string, AdcHost *> Instances;
+ Instances instances_;
+};
+
+AdcHostShared::AdcHostShared (Host &host)
+ : host_ (host)
+{
+ std::string instance = host_.get_instance ();
+ mex::Node &node = host_.get_node ();
+ mex::mtype_t mtype = node.reserve (instance + ":adc_channel");
+ node.handler_register (mtype, *this, &AdcHostShared::handle_adc_channel);
+}
+
+void
+AdcHostShared::register_instance (Host &host, AdcHost &instance,
+ const char *name)
+{
+ assert (&host == &host_);
+ std::pair<Instances::iterator, bool> r =
+ instances_.insert (Instances::value_type (name, &instance));
+ assert (r.second);
+}
+
+void
+AdcHostShared::handle_adc_channel (mex::Msg &msg)
+{
+ int ivalue, namelen;
+ msg.pop ("l") >> ivalue;
+ namelen = msg.len ();
+ std::string name (msg.pop (namelen), namelen);
+ Instances::iterator i = instances_.find (name);
+ assert (i != instances_.end ());
+ double fvalue = ivalue / (double) (1u << 31);
+ i->second->value_ = fvalue * i->second->resolution_;
+}
+
+AdcHostShared *AdcHost::shared_;
+
+AdcHost::AdcHost (Host &host, const char *name, int resolution)
+ : resolution_ (resolution), value_ (0)
+{
+ if (!shared_)
+ {
+ static AdcHostShared shared (host);
+ shared_ = &shared;
+ }
+ shared_->register_instance (host, *this, name);
+}
+
+} // namespace ucoo