From df68a8941c7905badb6506bb64dee4dfedbc2683 Mon Sep 17 00:00:00 2001
From: Rodrigo Alfonso <rodri042@gmail.com>
Date: Wed, 21 Aug 2024 21:24:19 -0300
Subject: [PATCH] Adding SPI transfer mode to LinkCableMultiboot_demo example

---
 README.md                                     |  2 +-
 examples/LinkCableMultiboot_demo/src/main.cpp | 32 ++++++++++++-------
 2 files changed, 22 insertions(+), 12 deletions(-)

diff --git a/README.md b/README.md
index 9ecb6af..f7198a3 100644
--- a/README.md
+++ b/README.md
@@ -121,7 +121,7 @@ You can change these compile-time constants:
 
 Name | Return type | Description
 --- | --- | ---
-`sendRom(rom, romSize, cancel, [mode])` | **LinkCableMultiboot::Result** | Sends the `rom`. During the handshake process, the library will continuously invoke `cancel`, and abort the transfer if it returns `true`. The `romSize` must be a number between `448` and `262144`, and a multiple of `16`. The `mode` can be either `TransferMode::MULTI_PLAY` for GBA cable (default value) or `TransferMode::SPI` for GBC cable. Once completed, the return value should be `LinkCableMultiboot::Result::SUCCESS`.
+`sendRom(rom, romSize, cancel, [mode])` | **LinkCableMultiboot::Result** | Sends the `rom`. During the handshake process, the library will continuously invoke `cancel`, and abort the transfer if it returns `true`. The `romSize` must be a number between `448` and `262144`, and a multiple of `16`. The `mode` can be either `LinkCableMultiboot::TransferMode::MULTI_PLAY` for GBA cable (default value) or `LinkCableMultiboot::TransferMode::SPI` for GBC cable. Once completed, the return value should be `LinkCableMultiboot::Result::SUCCESS`.
 
 ⚠️ for better results, turn on the GBAs **after** calling the `sendRom` method!
 
diff --git a/examples/LinkCableMultiboot_demo/src/main.cpp b/examples/LinkCableMultiboot_demo/src/main.cpp
index 05f5062..42bc9c7 100644
--- a/examples/LinkCableMultiboot_demo/src/main.cpp
+++ b/examples/LinkCableMultiboot_demo/src/main.cpp
@@ -11,6 +11,7 @@ extern "C" {
 
 static const GBFS_FILE* fs = find_first_gbfs_file(0);
 static u32 selectedFile = 0;
+static bool spi = false;
 
 void log(std::string text);
 void waitFor(u16 key);
@@ -53,7 +54,7 @@ int main() {
       ;
   }
 
-  bool left = false, right = false, a = false, b = false;
+  bool left = false, right = false, a = false, b = false, l = false;
 
   while (true) {
     // Get selected ROM name
@@ -68,12 +69,9 @@ int main() {
       }
     }
 
-    // Menu
-    log("LinkCableMultiboot_demo\n  (v7.0.0)\n\n"
-        "Press A to send the ROM...\n"
-        "Press B to launch the ROM...\nLEFT/RIGHT: select ROM\n\nSelected "
-        "ROM:\n  " +
-        std::string(name));
+    // Toggle mode
+    if (didPress(KEY_L, l))
+      spi = !spi;
 
     // Select ROM
     if (didPress(KEY_LEFT, left))
@@ -81,15 +79,27 @@ int main() {
     if (didPress(KEY_RIGHT, right))
       selectRight();
 
+    // Menu
+    log("LinkCableMultiboot_demo\n  (v7.0.0)\n\n"
+        "Press A to send the ROM...\n"
+        "Press B to launch the ROM...\nLEFT/RIGHT: select ROM\nL: toggle "
+        "mode\n\nSelected ROM:\n  " +
+        std::string(name) + "\n\nMode:\n  " +
+        std::string(spi ? "SPI (GBC cable)" : "MULTI_PLAY (GBA cable)"));
+
     // Send ROM
     if (didPress(KEY_A, a)) {
       log("Sending... (SELECT to cancel)");
 
       // (2) Send the ROM
-      auto result = linkCableMultiboot->sendRom(romToSend, romSize, []() {
-        u16 keys = ~REG_KEYS & KEY_ANY;
-        return keys & KEY_SELECT;
-      });
+      auto result = linkCableMultiboot->sendRom(
+          romToSend, romSize,
+          []() {
+            u16 keys = ~REG_KEYS & KEY_ANY;
+            return keys & KEY_SELECT;
+          },
+          spi ? LinkCableMultiboot::TransferMode::SPI
+              : LinkCableMultiboot::TransferMode::MULTI_PLAY);
 
       // Print results and wait
       log("Result: " + std::to_string(result) + "\n" +