From: Martin Mares <mj@ucw.cz>
Date: Fri, 18 Apr 2025 19:40:29 +0000 (+0200)
Subject: Waiting room: More display
X-Git-Url: http://mj.ucw.cz/gitweb/?a=commitdiff_plain;h=e642daef0b0a3cfed24a217b8084993c13dac629;p=home-hw.git

Waiting room: More display
---

diff --git a/waiting/firmware/main.c b/waiting/firmware/main.c
index c8b1b64..ac9b979 100644
--- a/waiting/firmware/main.c
+++ b/waiting/firmware/main.c
@@ -185,12 +185,23 @@ static void display_command(byte cmd)
 	display_write_nibble((cmd << 4) & 0xf0);
 }
 
+static void display_goto(uint row, uint col)
+{
+	display_command(LCD_CMD_SET_DDRAM_ADDR | (row * 0x40) | col);
+}
+
 static void display_char(byte ch)
 {
 	display_write_nibble((ch & 0xf0) | LCD_BIT_RS);
 	display_write_nibble(((ch << 4) & 0xf0) | LCD_BIT_RS);
 }
 
+static void display_string(const char *str)
+{
+	while (*str)
+		display_char(*str++);
+}
+
 static void display_init(void)
 {
 	debug_puts("Display init\n");
@@ -224,16 +235,13 @@ static void display_init(void)
 	// Configure text direction
 	display_command(LCD_CMD_ENTRY_MODE_SET | LCD_ENTRY_INCREMENT);
 
-	// Go home (this takes a long time)
-	display_command(LCD_CMD_RETURN_HOME);
+	// Clear the display (this takes a long time)
+	display_command(LCD_CMD_CLEAR_DISPLAY);
 	delay_ms(2);
 
-	display_char('M');
-	display_char('n');
-	display_char('a');
-	display_char('u');
-	display_char('!');
-	display_command(LCD_CMD_SET_DDRAM_ADDR | 1);
+	display_goto(0, 0);
+	display_string("Mnauky!");
+	display_goto(1, 0);
 
 	debug_puts("Display ready\n");
 }