From d4ad6844e3bd0cfdeff9c0312a0515fd379d5362 Mon Sep 17 00:00:00 2001
From: Martin Preuss <martin@aquamaniac.de>
Date: Mon, 2 Jun 2025 01:03:23 +0200
Subject: [PATCH] ili9341: save X

---
 avr/modules/lcd2/ili9341/text.asm | 16 ++++++++++------
 1 file changed, 10 insertions(+), 6 deletions(-)

diff --git a/avr/modules/lcd2/ili9341/text.asm b/avr/modules/lcd2/ili9341/text.asm
index 5345247..5950906 100644
--- a/avr/modules/lcd2/ili9341/text.asm
+++ b/avr/modules/lcd2/ili9341/text.asm
@@ -29,11 +29,15 @@
 ; @clobbers r16 (r17, r20, r21, r22, r23, r24, r25, X)
 
 ili9341_WriteCharacterX1At:
-  rcall ili9341FontRenderChar ; (r16, r17, r24, r25, z)
-  rcall ili9341BitBlit             ; (r16, r17, r20, r21, r22, r23, r24, r25, X)
-  ; advance X (add char width to X)
-  add r4, r8
-  adc r5, r9
+  push xl
+    push xh
+      rcall ili9341FontRenderChar ; (r16, r17, r24, r25, z)
+      rcall ili9341BitBlit             ; (r16, r17, r20, r21, r22, r23, r24, r25, X)
+      ; advance X (add char width to X)
+      add r4, r8
+      adc r5, r9
+    pop xh
+  pop xl
   ret
 ; @end
 
@@ -111,7 +115,7 @@ ili9341FontRenderChar:
   push xl
     push xh
       ; call render function of the selected font (first word of font is jmp to render function)
-      rcall ili9341JumpToFontRenderFn ; (r17, r24, r25, x, z)
+      rcall ili9341JumpToFontRenderFn ; (r17, r24, r25, x)
     pop xh
   pop xl