From 85cf49ed0d9d8837e6e5dc9537b0c77a2f966f13 Mon Sep 17 00:00:00 2001
From: red031000 <rubenru09@aol.com>
Date: Wed, 9 Sep 2020 18:13:46 +0100
Subject: arm9 MI_dma_hblank

---
 arm9/lib/src/MI_dma.c        |  4 ++--
 arm9/lib/src/MI_dma_hblank.c | 31 +++++++++++++++++++++++++++++++
 arm9/lib/src/MI_init.c       |  1 +
 3 files changed, 34 insertions(+), 2 deletions(-)
 create mode 100644 arm9/lib/src/MI_dma_hblank.c

(limited to 'arm9/lib/src')

diff --git a/arm9/lib/src/MI_dma.c b/arm9/lib/src/MI_dma.c
index 565b1ef6..f322f87f 100644
--- a/arm9/lib/src/MI_dma.c
+++ b/arm9/lib/src/MI_dma.c
@@ -258,8 +258,8 @@ ARM_FUNC void MIi_CheckAnotherAutoDMA(u32 dmaNo, u32 dmaType)
         timing = dmaCnt & 0x38000000;
 
         if (timing == dmaType
-            || (timing == 0x8000000 && dmaType == 0x10000000)
-            || (timing == 0x10000000 && dmaType == 0x8000000))
+            || (timing == 0x8000000 && dmaType == MI_DMA_TIMING_H_BLANK)
+            || (timing == MI_DMA_TIMING_H_BLANK && dmaType == 0x8000000))
         {
             continue;
         }
diff --git a/arm9/lib/src/MI_dma_hblank.c b/arm9/lib/src/MI_dma_hblank.c
new file mode 100644
index 00000000..67e579fe
--- /dev/null
+++ b/arm9/lib/src/MI_dma_hblank.c
@@ -0,0 +1,31 @@
+#include "MI_dma_hblank.h"
+#include "MI_dma.h"
+#include "function_target.h"
+
+ARM_FUNC void MI_HBlankDmaCopy32(u32 dmaNo, const void *src, void *dest, u32 size)
+{
+    MIi_CheckAnotherAutoDMA(dmaNo, MI_DMA_TIMING_H_BLANK);
+    MIi_CheckDma0SourceAddress(dmaNo, (u32)src, size, MI_DMA_SRC_INC);
+
+    if (size == 0)
+    {
+        return;
+    }
+
+    MI_WaitDma(dmaNo);
+    MIi_DmaSetParams(dmaNo, (u32)src, (u32)dest, (u32)(0x96600000 | (size / 4)));
+}
+
+ARM_FUNC void MI_HBlankDmaCopy16(u32 dmaNo, const void *src, void *dest, u32 size)
+{
+    MIi_CheckAnotherAutoDMA(dmaNo, MI_DMA_TIMING_H_BLANK);
+    MIi_CheckDma0SourceAddress(dmaNo, (u32)src, size, MI_DMA_SRC_INC);
+
+    if (size == 0)
+    {
+        return;
+    }
+
+    MI_WaitDma(dmaNo);
+    MIi_DmaSetParams(dmaNo, (u32)src, (u32)dest, (u32)(0x92600000 | (size / 2)));
+}
diff --git a/arm9/lib/src/MI_init.c b/arm9/lib/src/MI_init.c
index 4556e95a..4c861286 100644
--- a/arm9/lib/src/MI_init.c
+++ b/arm9/lib/src/MI_init.c
@@ -1,3 +1,4 @@
+#include "MI_init.h"
 #include "nitro/types.h"
 #include "function_target.h"
 #include "MI_dma.h"
-- 
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