Diff: tsi_sensor.h

Revision:

4:f64097679f27

Parent:

3:20ffa9b18488

Child:

5:f269379b60c5

diff -r 20ffa9b18488 -r f64097679f27 tsi_sensor.h
--- a/tsi_sensor.h	Sun Feb 23 18:31:58 2014 +0000
+++ b/tsi_sensor.h	Mon Aug 04 07:43:15 2014 +0000
@@ -52,6 +52,12 @@
 public:
     /** Initialize electrode.
      */
+    TSIElectrode(PinName pin) : _threshold(100) {
+        _channel = getTSIChannel(pin);
+    }
+
+    /** Initialize electrode.
+     */
     TSIElectrode(uint32_t tsi_channel) : _threshold(100) {
         _channel = (uint8_t)tsi_channel;
     }
@@ -100,6 +106,38 @@
     uint32_t getChannel() {
         return _channel;
     }
+    /** Get TSI Channel for PinName.
+     *
+     * @returns TSI channel ID for use in constructor of TSIAnalogSlider and TSIElectrode.
+     * @throws compile-time error if target is not supported, or runtime error if pin does not match any channel.
+     */
+    static uint8_t getTSIChannel(PinName pin) {
+#if   defined (TARGET_KL25Z)        
+        switch(pin) {
+            //these are 
+            case PTA0: return 1;
+            case PTA1: return 2;
+            case PTA2: return 3;
+            case PTA3: return 4;
+            case PTA4: return 5;
+            case PTB0: return 0;
+            case PTB1: return 6;
+            case PTB2: return 7;
+            case PTB3: return 8;
+            case PTB16: return 9;
+            case PTB17: return 10;
+            case PTB18: return 11;
+            case PTB19: return 12;
+            case PTC0: return 13;
+            case PTC1: return 14;
+            default: error("PinName provided to TSIElectrode::getTSIChannel() does not correspond to any known TSI channel.");
+        }
+# else
+    #error "Unknown target for TSIElectrode::getTSIChannel() - only supports KL25Z so far."
+# endif   
+        return 0xFF; //should never get here
+    }
+    
 private:
     uint8_t  _channel;
     uint16_t _signal;
@@ -112,6 +150,11 @@
 class TSIAnalogSlider {
 public:
     /**
+     *
+     *   Initialize the TSI Touch Sensor with the given PinNames
+     */
+    TSIAnalogSlider(PinName elec0, PinName elec1, uint32_t range);
+    /**
      *   Initialize the TSI Touch Sensor
      */
     TSIAnalogSlider(uint32_t elec0, uint32_t elec1, uint32_t range);
@@ -167,6 +210,7 @@
         return _instance;
     }
 private:
+    void initObject(void); //shared constructor code
     void sliderRead(void);
     void selfCalibration(void);
     void setSliderPercPosition(uint32_t elec_num, uint32_t position) {