From 3bb37dc83faa07ad0c1249a60e0a992a709974be Mon Sep 17 00:00:00 2001
From: Fisch <interfisch@gmx.net>
Date: Wed, 8 Feb 2023 21:00:15 +0100
Subject: [PATCH] implement basic update by column function

---
 flipcontrol_esp32/include/image.h | 14 ++++++--
 flipcontrol_esp32/src/image.cpp   | 59 +++++++++++++++++++++++++++++++
 flipcontrol_esp32/src/main.cpp    | 23 ++++++++++++
 3 files changed, 94 insertions(+), 2 deletions(-)

diff --git a/flipcontrol_esp32/include/image.h b/flipcontrol_esp32/include/image.h
index fa15be9..8c1ac66 100644
--- a/flipcontrol_esp32/include/image.h
+++ b/flipcontrol_esp32/include/image.h
@@ -10,7 +10,7 @@
 #define ROWS 16
 
 
-#define UPDATE_INTERVAL 5
+#define UPDATE_INTERVAL 5 //TODO: remove this
 
 class Image
 {
@@ -18,11 +18,20 @@ class Image
 private:
     Flipdot flipdot;
 
-    bool frontBuffer[16][16];
+    //buffer is 16 bit because of 16 Rows
+    uint16_t frontBuffer[COLUMNS];  //1 is bright dot / set dot. 0 is black / cleared
+    uint16_t backBuffer[COLUMNS];
 
+    bool flag_updating; //when true, display flip is in progress. frontBuffer does not match backBuffer
+
+    uint8_t update_counter; //used for keeping track of progress for updating
 
     int countz=0;
 
+    unsigned long lastUpdateMillis; //time when last dots where started flipping
+
+    unsigned long updateInterval;
+
 
 
 public:
@@ -34,6 +43,7 @@ public:
     uint8_t getW(); //returns Columns
     uint8_t getH(); //returns Rows
 
+    void setBuffer_solid(bool set);
 
     void loop_testDots();
     void loop_drawClearTest();
diff --git a/flipcontrol_esp32/src/image.cpp b/flipcontrol_esp32/src/image.cpp
index 8909746..d797259 100644
--- a/flipcontrol_esp32/src/image.cpp
+++ b/flipcontrol_esp32/src/image.cpp
@@ -11,6 +11,10 @@ Image::Image()
 void Image::init()
 {
     flipdot.init(); //sets pin modes etc.
+
+    flag_updating=false;
+    update_counter=0;
+    updateInterval=50;
 }
 
 uint8_t Image::getW() {
@@ -21,6 +25,61 @@ uint8_t Image::getH() {
     return ROWS;
 }
 
+void Image::setBuffer_solid(bool set)
+{
+    for (uint8_t x=0;x<getW();x++) {
+        if (set) {
+            backBuffer[x]=0xffff; //all white
+        }else{
+            backBuffer[x]=0x0; //all black
+        }
+    }
+
+    flag_updating=true; //make update run
+    
+}
+
+bool Image::updateByColumn(bool direction, bool clearFirst, bool optimizeClear, bool optimizeSet)
+{
+    if (millis()-lastUpdateMillis<updateInterval){ //too early
+        return 0; //not finished
+    }
+
+    if (!flag_updating) {
+        return 1; //finished
+    }
+
+    lastUpdateMillis=millis();
+
+    uint8_t x=update_counter/2;
+
+    if (update_counter%2==0) { //even counter numbers are for clearing
+        flipdot.setRow(0);
+        flipdot.selectColumnClear(x);
+        flipdot.shiftData();
+        if (!flipdot.clearSelectedColumn()) {
+            Serial.println("Error clearing column!");
+        }
+        frontBuffer[x]=0;
+    }else{ //odd counter numbers are for setting
+        flipdot.selectColumnSet(x); //lower column number is on the left
+        
+        flipdot.setRow(backBuffer[x]);
+        flipdot.shiftData();
+        flipdot.setSelectedDot();
+
+        frontBuffer[x]=backBuffer[x]; //flip current column in buffer
+    }
+
+    update_counter++; //next column
+
+    if (update_counter/2>=getW()) { //reached last column
+        flag_updating=false;
+        update_counter=0;
+        return 1; //finished
+    }
+    return 0; //not finished
+}
 
 
 void Image::loop_testDots() {
diff --git a/flipcontrol_esp32/src/main.cpp b/flipcontrol_esp32/src/main.cpp
index 30a78ce..f9c7666 100644
--- a/flipcontrol_esp32/src/main.cpp
+++ b/flipcontrol_esp32/src/main.cpp
@@ -25,7 +25,29 @@ void setup() {
 void loop() {
     loopmillis = millis();
     
+    static unsigned long last_change=0;
+    static bool color=0;
+    if (loopmillis-last_change >= 10000) 
+    {
+        Serial.print("Change to Solid color ="); Serial.println(color);
+        flip.setBuffer_solid(color);
+        color=1-color;
 
+        last_change=loopmillis;
+    }
+
+
+    if (loopmillis > last_update + UPDATE_INTERVAL) 
+    {
+        Serial.print("UpdateByColumn ");
+        bool result=flip.updateByColumn(0,0,0,0);
+        Serial.println(result);
+
+        last_update=loopmillis;
+    }
+    
+
+    /*
     if (loopmillis > last_update + UPDATE_INTERVAL) 
     {
         flip.loop_drawClearTest();
@@ -33,6 +55,7 @@ void loop() {
 
         last_update=loopmillis;
     }
+    */