From 4f4cbde2bfa5ed08c7a977d62fe479c85119096a Mon Sep 17 00:00:00 2001
From: Willem <willem@oldemans.nl>
Date: Thu, 7 Jan 2021 10:42:20 +0100
Subject: [PATCH] modified for 8x8 panels

---
 ledmatrix.py | 22 ++++++++++++++++------
 1 file changed, 16 insertions(+), 6 deletions(-)

diff --git a/ledmatrix.py b/ledmatrix.py
index 34c29e4..889f6c4 100755
--- a/ledmatrix.py
+++ b/ledmatrix.py
@@ -9,6 +9,8 @@
 # e.g. a driver that implements a serial protocol running on an MCU.
 #
 import time
+import math
+
 if not hasattr(time, 'ticks_ms'):
 	# Emulate https://docs.pycom.io/firmwareapi/micropython/utime.html
 	time.ticks_ms = lambda: int(time.time()*1000)
@@ -24,6 +26,7 @@ class LedMatrix:
 		self.fix_r = 0xff
 		self.fix_g = 0xff
 		self.fix_b = 0xc0
+		self.panelcolumn  = 8
 		if config:
 			if 'debug' in config:
 				self.debug = config['debug']
@@ -47,6 +50,12 @@ class LedMatrix:
 		# Initialize display
 		self.driver.init_display(self.num_pixels)
 
+	def round_down(self, n, decimals=0):
+		multiplier = 10 ** decimals
+		return math.floor(n * multiplier) / multiplier
+
+
+
 	def xy_to_phys(self, x, y):
 		"""
 		Map x,y to physical LED address after accounting for display rotation
@@ -68,12 +77,13 @@ class LedMatrix:
 		# one step to the east, and then south to north, before the cycle
 		# starts over.
 		stride = self.stride
-		phys_addr = x*stride
-		if x & 1:
-			phys_addr += stride - 1 - y
-		else:
-			phys_addr += y
-		return phys_addr
+		phys_addr =  ((x-1)%self.panelcolumn) + ((y-1)*self.panelcolumn) + (round_down((x-1)/self.panelcolumn) * self.panelcolumn * self.panelcolumn)
+					#MOD(x-1;panelCol) + ((y-1)*panelCol) + (FLOOR.MATH((x-1)/panelCol;1)*panelCol*panelRow)
+		# if x & 1:
+		# 	phys_addr += stride - 1 - y
+		# else:
+		# 	phys_addr += y
+		# return phys_addr
 
 	def get_pixel(self, x, y):
 		"""