From 6dbb576acad95e580f2d7c599b50a80d3dbd2e73 Mon Sep 17 00:00:00 2001
From: Manuel Reimer <manuel.reimer@gmx.de>
Date: Sun, 25 Mar 2018 14:12:48 +0200
Subject: st7565r-reel: Reduced memory usage of LCD buffer

---
 glcddrivers/st7565r-reel.c | 22 ++++++++--------------
 glcddrivers/st7565r-reel.h |  2 +-
 2 files changed, 9 insertions(+), 15 deletions(-)

diff --git a/glcddrivers/st7565r-reel.c b/glcddrivers/st7565r-reel.c
index 7a00703..a97b9cf 100644
--- a/glcddrivers/st7565r-reel.c
+++ b/glcddrivers/st7565r-reel.c
@@ -61,19 +61,19 @@ cDriverST7565RReel::~cDriverST7565RReel()
 int cDriverST7565RReel::Init(void)
 {
     width = config->width;
-    if (width < 0)
+    if (width <= 0)
         width = 128;
     height = config->height;
-    if (height < 0)
+    if (height <= 0)
         height = 64;
 
     // setup lcd array
-    LCD = new uint32_t *[width];
+    LCD = new unsigned char *[width / 8];
     if (LCD)
     {
-        for (int x = 0; x < width; x++)
+        for (int x = 0; x < width / 8; x++)
         {
-            LCD[x] = new uint32_t[height];
+            LCD[x] = new unsigned char[height];
         }
     }
 
@@ -101,7 +101,7 @@ int cDriverST7565RReel::DeInit(void)
     // free lcd array
     if (LCD)
     {
-        for (int x = 0; x < width; x++)
+        for (int x = 0; x < width / 8; x++)
         {
             delete[] LCD[x];
         }
@@ -152,14 +152,8 @@ int cDriverST7565RReel::CheckSetup(void)
 
 void cDriverST7565RReel::Clear(void)
 {
-    for (int y = 0; y < height; y++)
-    {
-        for (int x = 0; x < width; x++)
-        {
-            LCD[x][y] = GRAPHLCD_White;
-        }
-    }
-//    syslog(LOG_INFO, "Clear.\n");
+    for (int x = 0; x < width / 8; x++)
+        memset(LCD[x], 0, height);
 }
 
 void cDriverST7565RReel::SetPixel(int x, int y, uint32_t data)
diff --git a/glcddrivers/st7565r-reel.h b/glcddrivers/st7565r-reel.h
index 346f6d9..71b5089 100644
--- a/glcddrivers/st7565r-reel.h
+++ b/glcddrivers/st7565r-reel.h
@@ -43,7 +43,7 @@ class cDriverST7565RReel : public cDriver
 {
 private:
     cSerialPort* port;
-    uint32_t ** LCD;
+    unsigned char ** LCD;
     int CheckSetup(void);
     void display_cmd(unsigned char cmd);
     void display_data(unsigned char *data, unsigned char l);
-- 
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