Diff: QT1070.h

Revision:

0:cdb98fa5056a

Child:

1:324c2c093ab8

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/QT1070.h	Wed Jun 27 06:25:51 2018 +0000
@@ -0,0 +1,146 @@
+#ifndef QT1070_H
+#define QT1070_H
+
+#include <stdint.h>
+#include "mbed.h"
+
+/** AT42QT1070 class
+* Seven-channel QTouch® Touch Sensor Driver
+*
+* Example:
+* @code
+* #include "mbed.h"
+* #include "QT1070.h"
+*
+* DigitalOut led(LED1);
+* I2C i2c(PB_7,PB_6);
+* QT1070 touch(&i2c, PA_11);
+*
+* int main() {
+*     touch.guard(0);     
+*     touch.aksAve(5,0,0);    // Disable key5 AVE=0
+*     touch.aksAve(6,0,0);    // Disable key6 AVE=0
+*
+*     while(1) {
+*         if(touch.change()){
+*             led=!led;
+*             printf("Key %d!!!!\r\n", touch.key());
+*         }
+*     }
+* }
+* @endcode
+*/
+    
+class QT1070{
+    public:
+        enum state{
+            I2C_ADDR = 0x36,    //I2C adress 
+            KEY_NUM = 0x07,     //Number of channel
+            AVEMAX = 32,        //Averaging maximum
+            AKSMAX = 3          //Group maximum
+        };
+        
+        //Register map
+        enum reg{
+            REG_CHIPID  = 0,
+            REG_FIRMW   = 1,
+            REG_STATUS  = 2,
+            REG_KEYSTAT = 3,
+            REG_KEYSIG0 = 4,
+            REG_REFDAT0 = 18,
+            REG_NTHR0   = 32,
+            REG_AVEAKS0 = 39,
+            REG_DI0     = 46,
+            REG_FOMOGRD = 53,
+            REG_LOWPWR  = 54,
+            REG_MAXOND  = 55,
+            REG_CALIB   = 56,
+            REG_RESET   = 57   
+        };
+        
+        /** Create PCA9633 instance + config method
+        * @param *i2c initialized I2C bus to use
+        * @param change PinName if connected 
+        */
+        QT1070(I2C *i2c, PinName change=NC);
+         
+        /** Get key reg.
+        * @rerun 0 if not, 2^key if hit
+        */
+        char key(void);
+        
+        /** Check a change in status 
+        * @return true in change occurs
+        */
+        bool change(void);
+        
+        /** Get signal.
+        * @param key <0,6> key number
+        */
+        unsigned short signal(char key);
+        
+        /** Get reference.
+        * @param key <0,6> key number
+        */
+        unsigned short ref(char key);
+        
+        /** Set/Get negative threshold.
+        * @param key <0,6> key number
+        * @param val <1,255> (Getter if 0)
+        */
+        char nthresh(char key, char val=0);
+        
+        /** Set/Get adjacent supresssor group and averaging.
+        * @param key <0,6> key number
+        * @param group <0,3> adjacent key suppressor group of the key
+        * @param ave <1,31> averaged signal value
+        */
+        char aksAve(char key, char group=1, char ave=8);
+        
+        /** set DI.
+        * @param key <0,6> key number
+        * @param val <2,255> how measurement before confirm key hit
+        */
+        void detectInt(char key, char val);
+        
+        /** Set fastout and Maxcal.
+        * @param fo set the digital integrator of 4 for all channel
+        * @param maxcal if set only the key timeout was recalibrated   
+        */
+        void foMaxCal(bool fo, bool maxcal=false);
+        
+        /** Set a key to be guard channel (priority filtering).
+        * @param key <0,6> key number
+        */
+        void guard(char key);
+        
+        /** Set interval between key measurment to reduce pwr.
+        * @param ms <8,2040>[ms] in step of 8ms
+        */
+        void lowpwr(unsigned short ms);
+        
+        /** Set how long any key can be touch before it recalibrates itself.
+        * @param ms <0,40800>[ms] in step of 160ms 
+        */
+        void maxOnDuration(unsigned short ms);
+        
+        /** Trig a calibration cycle
+        */
+        void calibrate(void);
+        
+        /** Trig a RESET
+        */
+        void reset(void);
+    
+    protected:     
+        void write(char reg, char data);
+        void writeW(char reg, unsigned short data);
+        char read(char reg);
+        unsigned short readW(char reg);
+
+    private:
+        I2C *_i2c;
+        DigitalIn _change;
+};
+ 
+#endif