diff --git a/board.mk b/board.mk
index f59c4da..11f4864 100644
--- a/board.mk
+++ b/board.mk
@@ -1,4 +1,9 @@
 DDEFS += -DFIRMWARE_ID=\"AT32F435\"
 DDEFS += -DSHORT_BOARD_NAME=AT32F435
 
-DDEFS += -DAT32F435VGT7
+DDEFS += -DAT32F435xx
+
+# well, LOL
+#DDEFS += -DSTM32F437xx
+DDEFS += -DSTM32F4xx_MCUCONF
+#DDEFS += -DSTM32F437_MCUCONF
diff --git a/custom_platform.mk b/custom_platform.mk
index 1431814..f556772 100644
--- a/custom_platform.mk
+++ b/custom_platform.mk
@@ -1,3 +1,3 @@
-	CPU_STARTUP_DIR = $(CHIBIOS)/os/common/startup/ARMCMx/compilers/GCC/mk/startup_stm32f7xx.mk
+	CPU_STARTUP_DIR = $(CHIBIOS)/os/common/startup/ARMCMx/compilers/GCC/mk/startup_at32f4xx.mk
 	CPU_PLATFORM = $(CHIBIOS)/os/hal/ports/AT32/AT32F4xx/platform.mk
 	CPU_HWLAYER = ../../../../hw_layer_at
\ No newline at end of file
diff --git a/hw_layer_at/chconf.h b/hw_layer_at/chconf.h
index 866f9a8..c797958 100644
--- a/hw_layer_at/chconf.h
+++ b/hw_layer_at/chconf.h
@@ -28,9 +28,6 @@
 #ifndef CHCONF_H
 #define CHCONF_H
 
-// todo: access some existing configuration field
-#define STM32_SYSCLK 192000000	// 192 MHz
-
 #define _CHIBIOS_RT_CONF_
 #define _CHIBIOS_RT_CONF_VER_6_1_