From 475c9cdd4a6dde5d84fa6baeae2eb1c9854e5737 Mon Sep 17 00:00:00 2001
From: Markus Koch <markus@notsyncing.net>
Date: Thu, 30 Jul 2020 16:23:23 +0200
Subject: [PATCH] fw: Fix noisy picture?

Had noise artifacts on the OLED display... and for some reason,
this commit fixes it. But, I mean, WTF?!
---
 firmware/main.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/firmware/main.c b/firmware/main.c
index 39bfe24..18f8fde 100644
--- a/firmware/main.c
+++ b/firmware/main.c
@@ -31,12 +31,12 @@ uint8_t spi_proc()
 
 	if (spi_cs) {
 		if (SPSR & (1 << SPIF)) {
-			SPDR = spdr_next;
 			switch (y) {
-			case Y_MAX:
+			case Y_MAX - 1:
 				spdr_next = 55; // TODO: Vbat
 				break;
 			}
+			SPDR = spdr_next;
 			lcd_set_buffer(x, y, SPDR);
 			if (y == 0) {
 				y = Y_MAX;