From 034122ed922719f1cb0ba65a302e44026deb7671 Mon Sep 17 00:00:00 2001
From: shylie <shylie@shylie.info>
Date: Tue, 26 May 2026 06:12:34 -0400
Subject: [PATCH] Don't relaunch uploaded program automatically

---
 examples/first/first.c | 16 ++++++++++------
 src/card-os.c          | 10 ++++------
 2 files changed, 14 insertions(+), 12 deletions(-)

diff --git a/examples/first/first.c b/examples/first/first.c
index 3fab595..9603d54 100644
--- a/examples/first/first.c
+++ b/examples/first/first.c
@@ -1,13 +1,17 @@
 #include <card-os.h>
 
-static volatile int value;
-
 int main(void)
 {
-  card_os_put_rect((card_os_rect){
-    .r = 0, .g = 0, .b = 0, .x = 0, .y = 0, .w = 240, .h = 320 });
-  card_os_put_rect((card_os_rect){
-    .r = 0xFF, .g = 0xFF, .b = 0xFF, .x = 60, .y = 80, .w = 60, .h = 80 });
+  uint8_t value = 0;
+
+  while (value < 250)
+  {
+
+    card_os_put_rect((card_os_rect){
+      .r = value++, .g = 0, .b = 0, .x = 0, .y = 0, .w = 240, .h = 320 });
+    card_os_put_rect((card_os_rect){
+      .r = 0xFF, .g = 0xFF, .b = 0xFF, .x = 60, .y = 80, .w = 60, .h = 60 });
+  }
 
   return 0;
 }
diff --git a/src/card-os.c b/src/card-os.c
index 43bf21a..cca2ca8 100644
--- a/src/card-os.c
+++ b/src/card-os.c
@@ -41,7 +41,6 @@ int main(void)
   spi_set_format(DISPLAY_SPI, 8, SPI_CPOL_1, SPI_CPHA_1, SPI_MSB_FIRST);
 
   display_init();
-  display_put_rect(0xFF, 0xFF, 0xFF, 0, 0, 240, 320);
 
   tud_init(0);
 
@@ -82,14 +81,12 @@ void tud_vendor_rx_cb(uint8_t itf, const uint8_t* buffer, uint16_t bufsize)
         break;
 
       case RECV_HIGH8_LENGTH:
-        display_put_rect(0, 0, 0xFF, 0, 0, 240, 320);
         program_length |= buffer[bufidx];
         program_length <<= 8;
         recv_status = RECV_LOW8_LENGTH;
         break;
 
       case RECV_LOW8_LENGTH:
-        display_put_rect(0xFF, 0, 0, 0, 0, 240, 320);
         program_length |= buffer[bufidx];
         recv_status = RECV_PROGRAM;
         break;
@@ -98,7 +95,6 @@ void tud_vendor_rx_cb(uint8_t itf, const uint8_t* buffer, uint16_t bufsize)
         (&__user_ram_start)[program_write_index++] = buffer[bufidx];
         if (program_write_index == program_length)
         {
-          display_put_rect(0, 0xFF, 0, 0, 0, 240, 320);
           __dmb();
           user_program = (user_program_fn)((uintptr_t)&__user_ram_start | 1);
           __sev();
@@ -117,8 +113,6 @@ static volatile os_ring_buffer core1_buffer
 
 void core1_entry(void)
 {
-  display_put_rect(0xFF, 0, 0xFF, 0, 0, 240, 320);
-
   while (!user_program)
   {
     __wfe();
@@ -200,6 +194,10 @@ void os_handle_message(const os_message* msg, os_message* out)
   case OS_CMD_TERMINATE_PROGRAM:
     multicore_fifo_drain();
     multicore_reset_core1();
+    __dmb();
+    user_program = NULL;
+    __sev();
+    multicore_launch_core1(core1_entry);
     break;
   case OS_CMD_SBRK:
     os_sbrk(msg->data, &out->data);