diff --git a/Core/App/app.c b/Core/App/app.c
index 87d4bcf..8b4a88a 100644
--- a/Core/App/app.c
+++ b/Core/App/app.c
@@ -19,6 +19,10 @@ void __send_freq() {
     // TODO: 发送频率
 }
 
+void __send_volumn() {
+    // TODO: 发送音量
+}
+
 void __switch_to_fm() {
     // TODO: 切换到FM模式
 }
diff --git a/Core/App/global.h b/Core/App/global.h
index a41c8b9..8e156e9 100644
--- a/Core/App/global.h
+++ b/Core/App/global.h
@@ -7,6 +7,8 @@
 #define G_FM_FREQ_MAX 1080*2
 #define G_AM_FREQ_MIN 100
 #define G_AM_FREQ_MAX 33000
+#define G_VOLUMN_MIN 0
+#define G_VOLUMN_MAX 31
 
 #define G_FL_SIGNAL          0b0000000000000001
 
diff --git a/Core/Hardware/kt0915/KT0915.C b/Core/Hardware/KT0915/kt0915.c
similarity index 96%
rename from Core/Hardware/kt0915/KT0915.C
rename to Core/Hardware/KT0915/kt0915.c
index e1a609c..9a29eef 100644
--- a/Core/Hardware/kt0915/KT0915.C
+++ b/Core/Hardware/KT0915/kt0915.c
@@ -1,4 +1,4 @@
-#include "KT0915.h"
+#include "kt0915.h"
 
 #define enablePort GPIOB
 
diff --git a/Core/Hardware/kt0915/KT0915.h b/Core/Hardware/KT0915/kt0915.h
similarity index 100%
rename from Core/Hardware/kt0915/KT0915.h
rename to Core/Hardware/KT0915/kt0915.h
diff --git a/Makefile b/Makefile
index ee8735f..c598e99 100644
--- a/Makefile
+++ b/Makefile
@@ -73,13 +73,13 @@ Core/App/app.c \
 Core/App/global.c \
 Core/Hardware/RotaryCoder/RotaryCoder.c	\
 Core/Hardware/ST7735/st7735.c \
+Core/Hardware/KT0915/kt0915.c \
+Core/Hardware/SWI2C/i2c_sw.c \
 Core/App/Graphic/monoimg.c \
 Core/App/Graphic/ui.c \
 Core/App/Graphic/bmfont.c \
 Core/App/Graphic/asciifont.c \
-Core/App/Input/keypad.c \
-#Core/Hardware/kt0915/KT0915.C \
-#Core/Hardware/SWI2C/i2c_sw.c \
+Core/App/Input/keypad.c
 
 
 # ASM sources
@@ -146,10 +146,10 @@ C_INCLUDES =  \
 -ICore/App \
 -ICore/Hardware/RotaryCoder \
 -ICore/Hardware/ST7735	\
+-ICore/Hardware/KT0915 \
+-ICore/Hardware/SWI2C  \
 -ICore/App/Graphic \
--ICore/App/Input \
-#-ICore/Hardware/kt0915 \
-#-ICore/Hardware/SWI2C  \
+-ICore/App/Input
 
 
 # compile gcc flags