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authorNicolas Schodet2013-04-07 15:13:30 +0200
committerNicolas Schodet2013-04-07 17:01:32 +0200
commit8839bc9dca03c15f24fccc1abc774cc7dcc98d8a (patch)
tree60de424dd317859418d7313568c2b2898476c044 /digital/io-hub/src/common-cc
parent8a4442241c8f99947297da8b1f238c9e1c5e28ce (diff)
digital/io-hub/src/apbirthday: add I2C potentiometer control
Diffstat (limited to 'digital/io-hub/src/common-cc')
-rw-r--r--digital/io-hub/src/common-cc/potentiometer.cc51
-rw-r--r--digital/io-hub/src/common-cc/potentiometer.hh42
2 files changed, 93 insertions, 0 deletions
diff --git a/digital/io-hub/src/common-cc/potentiometer.cc b/digital/io-hub/src/common-cc/potentiometer.cc
new file mode 100644
index 00000000..a5a519bb
--- /dev/null
+++ b/digital/io-hub/src/common-cc/potentiometer.cc
@@ -0,0 +1,51 @@
+// io-hub - Modular Input/Output. {{{
+//
+// 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 "potentiometer.hh"
+
+Potentiometer::Potentiometer (I2cQueue &queue, int a2a1a0)
+ : I2cQueue::Slave (queue, 0x50 | (a2a1a0 << 1), 0)
+{
+}
+
+void
+Potentiometer::recv_status (const uint8_t *status)
+{
+}
+
+void
+Potentiometer::send_command (int mem_addr, int data)
+{
+ uint8_t buf[] = {
+ (uint8_t) ((mem_addr << 4) | ((data >> 8) & 1)),
+ (uint8_t) (data & 0xff),
+ };
+ send (buf, sizeof (buf), I2cQueue::RAW);
+}
+
+void
+Potentiometer::set_wiper (int index, int data, bool eeprom)
+{
+ send_command (index + (eeprom ? 2 : 0), data);
+}
+
diff --git a/digital/io-hub/src/common-cc/potentiometer.hh b/digital/io-hub/src/common-cc/potentiometer.hh
new file mode 100644
index 00000000..a7204af8
--- /dev/null
+++ b/digital/io-hub/src/common-cc/potentiometer.hh
@@ -0,0 +1,42 @@
+#ifndef potentiometer_hh
+#define potentiometer_hh
+// io-hub - Modular Input/Output. {{{
+//
+// 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 "i2c_queue.hh"
+
+/// I2C potentiometer, MCP4661.
+class Potentiometer : public I2cQueue::Slave
+{
+ public:
+ /// Constructor with address variable part.
+ Potentiometer (I2cQueue &queue, int a2a1a0);
+ /// See I2cQueue::Slave::recv_status.
+ void recv_status (const uint8_t *status);
+ /// Send a low level command.
+ void send_command (int mem_addr, int data);
+ /// Set wiper to specified level.
+ void set_wiper (int index, int data, bool eeprom = false);
+};
+
+#endif // potentiometer_hh