From 089d9746daed303a343842ff652ac0a3547a455f Mon Sep 17 00:00:00 2001
From: Maxwell Beck <max@rastertail.net>
Date: Tue, 27 Oct 2026 21:34:51 -0500
Subject: logo splash

---
 src/pico1541.c |  5 ++---
 src/splash.c   | 20 ++++++++++++++++++++
 src/splash.h   | 10 ++++++++++
 src/ssd1306.c  | 22 +++++++++++++++++-----
 src/ssd1306.h  |  5 +++--
 5 files changed, 52 insertions(+), 10 deletions(-)
 create mode 100644 src/splash.c
 create mode 100644 src/splash.h

(limited to 'src')

diff --git a/src/pico1541.c b/src/pico1541.c
index a5bbbf5..170491a 100644
--- a/src/pico1541.c
+++ b/src/pico1541.c
@@ -3,6 +3,7 @@
 #include <pico/error.h>
 #include <pico/time.h>
 
+#include "splash.h"
 #include "ssd1306.h"
 
 int main() {
@@ -21,9 +22,7 @@ int main() {
   ssd_init(&display, i2c0, 0x3C);
   ssd_power_on(&display);
 
-  ssd_push(&display, SSD1306_CTRL_DATA);
-  ssd_push_str(&display, "HEWWO OwO");
-  ssd_send(&display);
+  splash_draw(&display);
   
   return 0;
 }
diff --git a/src/splash.c b/src/splash.c
new file mode 100644
index 0000000..828559a
--- /dev/null
+++ b/src/splash.c
@@ -0,0 +1,20 @@
+#include "splash.h"
+
+#include <pico/error.h>
+
+const uint8_t splash_chars[64] = {
+  0x20, 0xdf, 0xe9, 0x20, 0xa0, 0xa0, 0xa0, 0xa0, 0x20, 0xdf, 0xe9, 0x20, 0xa0, 0xa0, 0xa0, 0xa0,
+  0x55, 0x55, 0x49, 0x49, 0xa0, 0xd5, 0xc9, 0xa0, 0x55, 0x55, 0x49, 0x49, 0xa0, 0xd5, 0xc9, 0xa0,
+  0x4a, 0x57, 0x57, 0x4b, 0xa0, 0xca, 0xcb, 0xfe, 0x4a, 0x57, 0x57, 0x4b, 0xa0, 0xca, 0xcb, 0xfe,
+  0x20, 0x4a, 0x4b, 0x20, 0xa0, 0xea, 0xf4, 0xa0, 0x20, 0x4a, 0x4b, 0x20, 0xa0, 0xea, 0xf4, 0xa0,
+};
+
+int splash_draw(ssd1306_t *display) {
+  for (int i = 0; i < 64; i++) {
+    int ret = ssd_putscr(display, splash_chars[i], false);
+    if (ret < 0) {
+      return ret;
+    }
+  }
+  return PICO_OK;
+}
diff --git a/src/splash.h b/src/splash.h
new file mode 100644
index 0000000..b1039e5
--- /dev/null
+++ b/src/splash.h
@@ -0,0 +1,10 @@
+#ifndef PICO1541_SPLASH_H
+#define PICO1541_SPLASH_H
+
+#include <stdint.h>
+
+#include "ssd1306.h"
+
+int splash_draw(ssd1306_t *display);
+
+#endif
diff --git a/src/ssd1306.c b/src/ssd1306.c
index e1c00ff..04991a2 100644
--- a/src/ssd1306.c
+++ b/src/ssd1306.c
@@ -77,22 +77,34 @@ int ssd_power_on(ssd1306_t *display) {
   return ssd_send(display);
 }
 
-int ssd_push_char(ssd1306_t *display, const char c) {
-  uint8_t scr = ascii_to_screen[c];
+int ssd_putscr(ssd1306_t *display, const uint8_t c, bool shift) {
+  ssd_push(display, SSD1306_CTRL_DATA);
 
   for (int i = 0; i < 8; i++) {
-    int ret = ssd_push(display, c64_chars[scr + 256][i]);
+    int b;
+    if (shift) {
+      b = c64_chars[c + 256][i];
+    } else {
+      b = c64_chars[c][i];
+    }
+    
+    int ret = ssd_push(display, b);
     if (ret < 0) {
       return ret;
     }
   }
 
-  return PICO_OK;
+  return ssd_send(display);
+}
+
+int ssd_putchar(ssd1306_t *display, const char c) {
+  uint8_t scr = ascii_to_screen[c];
+  return ssd_putscr(display, scr, true);
 }
 
 int ssd_push_str(ssd1306_t *display, const char *str) {
   for (int i = 0; str[i]; i++) {
-    int ret = ssd_push_char(display, str[i]);
+    int ret = ssd_putchar(display, str[i]);
     if (ret < 0) {
       return ret;
     }
diff --git a/src/ssd1306.h b/src/ssd1306.h
index 9c72d04..581b683 100644
--- a/src/ssd1306.h
+++ b/src/ssd1306.h
@@ -135,7 +135,8 @@ int ssd_send(ssd1306_t *display);
 
 int ssd_power_on(ssd1306_t *display);
 
-int ssd_push_char(ssd1306_t *display, const char c);
-int ssd_push_str(ssd1306_t *display, const char *str);
+int ssd_putscr(ssd1306_t *display, const uint8_t c, bool shift);
+int ssd_putchar(ssd1306_t *display, const char c);
+int ssd_putstr(ssd1306_t *display, const char *str);
 
 #endif
-- 
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