Update comments

Author: kaathewise

src/dev/mpr121.h

@@ -131,11 +131,9 @@ class Mpr121
 
         WriteRegister(MPR121_ECR, 0x0);
 
-        // this doesn't work for some reason...
-        // uint8_t c = ReadRegister8(MPR121_CONFIG2);
+        uint8_t c = ReadRegister8(MPR121_CONFIG2);
 
-        // if(c != 0x24)
-        //     return ERR;
+        if (c != 0x24) return ERR;
 
         SetThresholds(config_.touch_threshold, config_.release_threshold);
         WriteRegister(MPR121_MHDR, 0x01);
@@ -168,7 +166,7 @@ class Mpr121
         // enable X electrodes and start MPR121
         uint8_t ECR_SETTING
             = 0x80
-              + 12; // 5 bits for baseline tracking & proximity disabled + X
+              + 12; // enable baseline tracking (10) & disable proximity (00) + X
                     // amount of electrodes running (12)
         WriteRegister(MPR121_ECR,
                       ECR_SETTING); // start with above ECR setting