add mkfont.py to LCD1602_BIG_DIGITS.

use mkfont.py to convert FONT from "small_16x2_display_big_digits__upir.ino".

Author: shaoziyang

lcd/LCD1602_BIG_DIGITS/mkfont.py

@@ -0,0 +1,53 @@
+'''
+
+  make big digit font from "small_16x2_display_big_digits__upir.ino".
+  
+'''
+
+print('Make fonts from "small_16x2_display_big_digits__upir.ino"')
+
+f = open('small_16x2_display_big_digits__upir.ino', 'rt')
+buf = f.readlines()
+f.close()
+
+linecnt = len(buf)
+
+fontname = ''
+
+BIGFONT = {}
+
+def mt(n):
+    return (int(n)+2)%256
+
+for i in range(linecnt):
+    p = buf[i].find('_00[8] PROGMEM')
+    if p>10:
+        fontname = buf[i][11:p]
+        fontdat = bytearray(64)
+        fontdig = bytearray(20)
+        for n in range(8):
+            x = p
+            for m in range(8):
+                x = buf[i+n].find('B' ,x+6)
+                s = '0'+buf[i+n][x:x+6]
+                fontdat[n*8+m]=int(s, 2)
+                
+    p = buf[i].find('_digits[10][4] = ')
+    if p>4:
+        if buf[i][5:p] == fontname:
+            s = buf[i][p+len('_digits[10][4] = '):]
+            s = s.replace('{','').replace('}','').replace(';','')
+            d=s.split(',')
+            for n in range(20):
+                fontdig[n] = mt(d[n*2])*16+mt(d[n*2+1])
+            BIGFONT[fontname] = [fontdat, fontdig]            
+
+        fontname = ''
+
+print('FONT number:', len(BIGFONT))
+print('BIGFONTS = {')
+x = list(BIGFONT.keys())
+for i in range(len(x)):
+    print("    '{}':[{},{}],".format(x[i],bytes(BIGFONT[x[i]][0]),bytes(BIGFONT[x[i]][1])))
+print('}')
+