Adding touch control to change the display brightness

mariobros-clock.ino

@@ -2,6 +2,7 @@
 #include "Clockface.h"
 #include "WiFiConnect.h"
 #include "CWDateTime.h"
+#include "touch.h"
 
 MatrixPanel_I2S_DMA *dma_display = nullptr;
 WiFiConnect wifi;
@@ -12,8 +13,6 @@ uint16_t myBLACK = dma_display->color565(0, 0, 0);
 uint16_t myWHITE = dma_display->color565(255, 255, 255);
 uint16_t myBLUE = dma_display->color565(0, 0, 255);
 
-byte displayBright = 32;
-
 void displaySetup() {
   HUB75_I2S_CFG mxconfig(
     64,   // module width
@@ -52,9 +51,16 @@ void setup() {
   cwDateTime.begin();
 
   clockface->setup(&cwDateTime);
+
+  // For touch code to update
+  matrixDisplay = dma_display;
+
+  // Adding interupts to the Trinity Touchpads
+  touchAttachInterrupt(T8, gotTouch8, threshold);
+  touchAttachInterrupt(T9, gotTouch9, threshold);
 }
 
 void loop() {
   clockface->update();
-
+  processTouch();
 }

touch.h

@@ -0,0 +1,44 @@
+uint8_t displayBright = 32;
+uint8_t brightnessChangeSteps = 4;
+
+int threshold = 40; //This is a decent value from testing
+bool touch8detected = false;
+bool touch9detected = false;
+
+MatrixPanel_I2S_DMA *matrixDisplay;
+
+// We will change the brightness in the loop rather than the interupts
+void gotTouch8() {
+  touch8detected = true;
+}
+
+void gotTouch9() {
+  touch9detected = true;
+}
+
+void processTouch() {
+  if (touch8detected) {
+    //Bright up
+    touch8detected = false;
+    //Serial.println("Touch 8 detected");
+    if (displayBright > 255 - brightnessChangeSteps) {
+      displayBright = 255;
+    } else {
+      displayBright = displayBright + brightnessChangeSteps;
+    }
+    matrixDisplay->setBrightness8(displayBright);
+  }
+  if (touch9detected) {
+    //Bright down
+    touch9detected = false;
+    //Serial.println("Touch 9 detected");
+
+    if (displayBright <= brightnessChangeSteps) {
+      displayBright = brightnessChangeSteps;
+      //1 seems to be off, so no point being that low
+    } else {
+      displayBright = displayBright - brightnessChangeSteps;
+    }
+    matrixDisplay->setBrightness8(displayBright);
+  }
+}