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| author | Vasil Zlatanov <v@skozl.com> | 2017-05-03 16:30:16 +0100 |
|---|---|---|
| committer | Vasil Zlatanov <v@skozl.com> | 2017-05-03 16:30:16 +0100 |
| commit | a6ed1742539c62186fb903017b52dd48f145ae4f (patch) | |
| tree | e9f49f0437e1f260b276b45fddcb66ea524f49e3 /ext/BusInOut.h | |
| download | e2-switch-a6ed1742539c62186fb903017b52dd48f145ae4f.tar.gz e2-switch-a6ed1742539c62186fb903017b52dd48f145ae4f.tar.bz2 e2-switch-a6ed1742539c62186fb903017b52dd48f145ae4f.zip | |
Add template and build environment.
Diffstat (limited to 'ext/BusInOut.h')
| -rw-r--r-- | ext/BusInOut.h | 117 |
1 files changed, 117 insertions, 0 deletions
diff --git a/ext/BusInOut.h b/ext/BusInOut.h new file mode 100644 index 0000000..42f2d17 --- /dev/null +++ b/ext/BusInOut.h @@ -0,0 +1,117 @@ +/* mbed Microcontroller Library
+ * Copyright (c) 2006-2013 ARM Limited
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+#ifndef MBED_BUSINOUT_H
+#define MBED_BUSINOUT_H
+
+#include "DigitalInOut.h"
+
+namespace mbed {
+
+/** A digital input output bus, used for setting the state of a collection of pins
+ */
+class BusInOut {
+
+public:
+
+ /** Create an BusInOut, connected to the specified pins
+ *
+ * @param p<n> DigitalInOut pin to connect to bus bit p<n> (p5-p30, NC)
+ *
+ * @note
+ * It is only required to specify as many pin variables as is required
+ * for the bus; the rest will default to NC (not connected)
+ */
+ BusInOut(PinName p0, PinName p1 = NC, PinName p2 = NC, PinName p3 = NC,
+ PinName p4 = NC, PinName p5 = NC, PinName p6 = NC, PinName p7 = NC,
+ PinName p8 = NC, PinName p9 = NC, PinName p10 = NC, PinName p11 = NC,
+ PinName p12 = NC, PinName p13 = NC, PinName p14 = NC, PinName p15 = NC);
+
+ BusInOut(PinName pins[16]);
+
+ virtual ~BusInOut();
+
+ /* Group: Access Methods */
+
+ /** Write the value to the output bus
+ *
+ * @param value An integer specifying a bit to write for every corresponding DigitalInOut pin
+ */
+ void write(int value);
+
+ /** Read the value currently output on the bus
+ *
+ * @returns
+ * An integer with each bit corresponding to associated DigitalInOut pin setting
+ */
+ int read();
+
+ /** Set as an output
+ */
+ void output();
+
+ /** Set as an input
+ */
+ void input();
+
+ /** Set the input pin mode
+ *
+ * @param mode PullUp, PullDown, PullNone
+ */
+ void mode(PinMode pull);
+
+ /** Binary mask of bus pins connected to actual pins (not NC pins)
+ * If bus pin is in NC state make corresponding bit will be cleared (set to 0), else bit will be set to 1
+ *
+ * @returns
+ * Binary mask of connected pins
+ */
+ int mask() {
+ return _nc_mask;
+ }
+
+#ifdef MBED_OPERATORS
+ /** A shorthand for write()
+ */
+ BusInOut& operator= (int v);
+ BusInOut& operator= (BusInOut& rhs);
+
+ /** Access to particular bit in random-iterator fashion
+ */
+ DigitalInOut& operator[] (int index);
+
+ /** A shorthand for read()
+ */
+ operator int();
+#endif
+
+protected:
+ DigitalInOut* _pin[16];
+
+ /** Mask of bus's NC pins
+ * If bit[n] is set to 1 - pin is connected
+ * if bit[n] is cleared - pin is not connected (NC)
+ */
+ int _nc_mask;
+
+ /* disallow copy constructor and assignment operators */
+private:
+ BusInOut(const BusInOut&);
+ BusInOut & operator = (const BusInOut&);
+};
+
+} // namespace mbed
+
+#endif
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