From 8bd6197c02b3d0920519e5bcda0405281b682238 Mon Sep 17 00:00:00 2001
From: Wolfgang Hottgenroth <wolfgang.hottgenroth@icloud.com>
Date: Wed, 13 Mar 2024 14:54:53 +0100
Subject: [PATCH] spi timing

---
 displayDriver.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/displayDriver.c b/displayDriver.c
index 6012ac7..16607c5 100644
--- a/displayDriver.c
+++ b/displayDriver.c
@@ -33,7 +33,11 @@ void displayDriverInit() {
   UCB0CTL0 = UCMST;
   // SPI timing config
   UCB0CTL1 = UCSSEL_3;
-  UCB0BR0 = 4; // 2 would be too fast and ends up with errors
+  // Faster than 8 ends up in strange communication errors
+  // between the both MCUs.
+  // With 8 the transfer of a complete 110 pixel canvas takes
+  // about 720us.
+  UCB0BR0 = 8; 
   UCB0BR1 = 0;
 
   // BIT5: UCB0CLK