From 2a88835da5db7d52963b55ffe27f931461a9ce22 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Michal=20Proch=C3=A1zka?= <michal@prochazkaml.eu>
Date: Sun, 21 Sep 2025 10:56:15 +0200
Subject: [PATCH] Massively sped up LCD comms

---
 example.c | 11 +++++++----
 1 file changed, 7 insertions(+), 4 deletions(-)

diff --git a/example.c b/example.c
index 183fd8f..ff45120 100644
--- a/example.c
+++ b/example.c
@@ -13,7 +13,7 @@
 #include <stdint.h>
 
 #define TICK_RATE 100
-#define NPER (0x10000 - (20000000 / 12 / TICK_RATE))
+#define NPER (0x10000 - (20000000 / 6 / TICK_RATE))
 
 // I/O definitions
 #define BUTTON_1 P3_2
@@ -64,8 +64,7 @@ uint8_t lcd_pos;
 
 // Quick'n'dirty CPU pause, just enough for the LCD to stabilize.
 void lcd_pause(void) {
-	int i = 30;
-	while(i--);
+	__asm__ ("nop");
 }
 
 // Reads the status register from the LCD.
@@ -174,6 +173,8 @@ void lcd_putchar(char c) {
 
 // Initializes the background tick timer (for delays).
 void timer_init(void) {
+	CKCON0 = X2; // Enable 2x clock mode
+
 	// Initialize timer 0 as 16-bit countdown, timer 1 as 8-bit auto-reload countdown
 
 	TMOD = 0x21;
@@ -194,7 +195,7 @@ void serial_init(void) {
 	// Initialize timer 2 as 312500 Hz as the baud rate generator (for tulflash)
 
 	RCAP2H = 0xFF;
-	RCAP2L = 0xFE;
+	RCAP2L = 0xFC;
 	T2CON = 0x34;
 
 	// Initialize serial I/O
@@ -286,6 +287,8 @@ void main(void) {
 	lcd_init();
 	serial_init();
 
+	delay(1);
+
 	stdout_to_serial = 1;
 	stdout_to_lcd = 1;