From 85b59eac525be21de66fbf7ca4039af5048bad23 Mon Sep 17 00:00:00 2001
From: Jan Michel <j.michel@gsi.de>
Date: Fri, 12 Jul 2019 11:37:51 +0200
Subject: [PATCH] =?utf8?q?=20fix=20display=20bug=20below=200=C2=B0?=
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---
 atmega32u4/cooler/cooler.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/atmega32u4/cooler/cooler.c b/atmega32u4/cooler/cooler.c
index ae8ff3c..d2163a7 100644
--- a/atmega32u4/cooler/cooler.c
+++ b/atmega32u4/cooler/cooler.c
@@ -57,9 +57,10 @@ void draw(void) {
       else    lcd_use_foreground(colors[0]);
 
       uint16_t y = values[i][p];
+      y = y + 20*16; //plus 20K to have positive values at minimum
       y = y*3;
       y >>= 5;
-      y = 190-y;
+      y = 220-y; //190 + 30 for correction
       if(y<MAXY && y>MINY-1) {
         lcd_set_pixel_col_xy(c+1,y,background);
         lcd_set_pixel_col_xy(c+1,y+1,background);
@@ -530,4 +531,4 @@ __attribute__((naked)) int main(void) {
       }
     }  
   }   
-    
\ No newline at end of file
+    
-- 
2.43.0