Revision 0:db2aa0ada4f9, committed 2010-11-09

Comitter:

EricWieser

Date:

Tue Nov 09 19:30:45 2010 +0000

Child:

1:6b38423b75db

Commit message:

First commit

Changed in this revision

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/BarChart.cpp	Tue Nov 09 19:30:45 2010 +0000
@@ -0,0 +1,74 @@
+#include "BarChart.h"
+#include "mbed.h"
+
+
+BarChart::~BarChart() {
+    for(int i = 0; i < _numPins; i++)
+    {
+        delete _outputs[i];
+    }
+    delete [] _outputs;
+}
+
+BarChart::BarChart() {
+    PwmOut ** tmp = _outputs = new PwmOut*[4];
+    *tmp++ = new PwmOut(LED1);
+    *tmp++ = new PwmOut(LED2);
+    *tmp++ = new PwmOut(LED3);
+    *tmp++ = new PwmOut(LED4);
+    _numPins = 4;
+    _init();
+}
+
+BarChart::BarChart(PinName p1,  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, PinName p16 = NC) {
+    PinName all[16] = {p1, p2, p3, p4, p5, p6, p7, p8, p9, p10, p11, p12, p13, p14, p15, p16};
+
+    _numPins = 0;
+    for (int i = 0; i < 16; i++)
+        if (all[i] != NC)
+            _numPins++;
+
+    _outputs = new PwmOut*[_numPins];
+
+    _numPins = 0;
+    for (int i = 0; i < 16; i++)
+        if (all[i] != NC)
+            _outputs[_numPins++] = new PwmOut(all[i]);
+
+    _init();
+}
+
+void BarChart::_init() {
+    setInputLimits(0, 1);
+    setOutputLimits(0, 1);
+}
+
+void BarChart::setInputLimits(float min, float max) {
+    _minInput = min;
+    _maxInput = max;
+}
+
+void BarChart::setOutputLimits(float min, float max) {
+    _minOutput = min;
+    _maxOutput = max;
+}
+
+float BarChart::_linearScale(float value) {
+    return (value - _minInput)/(_maxInput - _minInput);
+}
+
+void BarChart::show(float value) {
+    value = _linearScale(value) * _numPins;
+
+    for (int i = 0; i < _numPins; i++) {
+       if (i < value - 1)
+            *_outputs[i] = _maxOutput;
+        else if (i > value)
+            *_outputs[i] = _minOutput;
+        else
+            *_outputs[i] = _minOutput + (value - i)*(_maxOutput - _minOutput);
+    }
+}

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/BarChart.h	Tue Nov 09 19:30:45 2010 +0000
@@ -0,0 +1,75 @@
+#ifndef MBED_BAR_CHART_H
+#define MBED_BAR_CHART_H
+
+#include "mbed.h"
+/** Bar chart output class, based on an array of PwmOuts
+*
+* Example:
+ * @code
+ * // Display the voltage at pin 20 as a bar chart on the on-board LEDs
+ * #include "mbed.h"
+ * #include "BarChart.h"
+ *
+ * BarChart b;
+ * AnalogIn input(p20);
+
+ * int main() {
+ *    //Set the maximum and minimum LED brightness
+ *    b.setOutputLimits(0.1,0.9);
+ *
+ *    while(1) {
+ *        b = input;
+ *        //equivalent to b.show(in);
+ *
+ *        wait(0.01);
+ *    }
+ * }
+ * @endcode
+ */
+class BarChart {
+public:
+    /** Create a Bar chart from the 4 LEDs mounted on the board */
+    BarChart();
+    /** Create a Bar chart from the (PWM) pins specified
+     *
+     * @param pxx the pins to use, lowest bar first
+     */
+    BarChart(PinName p1,  PinName p2,  PinName p3,  PinName p4,
+             PinName p5,  PinName p6,  PinName p7,  PinName p8,
+             PinName p9,  PinName p10, PinName p11, PinName p12,
+             PinName p13, PinName p14, PinName p15, PinName p16);
+    /** Set the range of input that will be provided to the BarChart
+     *
+     * @param min The lowest value that the barchart will display
+     * @param max The highest value that the barchart will display
+     */
+    void setInputLimits(float min, float max);
+    /** Set the range of output that will be provided to the PWM pins
+     *
+     * @param min The lowest duty cycle of the PwmOuts
+     * @param max The highest duty cycle of the PwmOuts
+     */
+    void setOutputLimits(float min, float max);
+    /** Output the value to the PwmOuts
+     *
+     * @param value The value to display
+     */
+    void show(float value);
+    /** Shorthand for the show function */
+    BarChart& operator = (float value) {
+        show(value);
+        return *this;
+    };
+    ~BarChart();
+private:
+    PwmOut **_outputs;
+    int _numPins;
+    float _maxInput;
+    float _minInput;
+    float _maxOutput;
+    float _minOutput;
+    float _linearScale(float value);
+    void _init();
+};
+
+#endif
\ No newline at end of file