diff --git a/jacdac-c b/jacdac-c
index 14bb4af..a042924 160000
--- a/jacdac-c
+++ b/jacdac-c
@@ -1 +1 @@
-Subproject commit 14bb4afc34288e68a874aa9d9e387ad597301b8d
+Subproject commit a04292493eea8309d409108a66c9a06c3b2e45b9
diff --git a/jacdac-stm32x0 b/jacdac-stm32x0
index c5ecb0a..de31351 160000
--- a/jacdac-stm32x0
+++ b/jacdac-stm32x0
@@ -1 +1 @@
-Subproject commit c5ecb0a6dda0766c3cfe82ee5d9971f217ab2f72
+Subproject commit de3135101db3894f660c7d11ab2155c530d3a900
diff --git a/targets/star-brain/board.h b/targets/star-brain/board.h
index a28c5c0..477be10 100644
--- a/targets/star-brain/board.h
+++ b/targets/star-brain/board.h
@@ -63,3 +63,12 @@
 #define PIN_BL_PERIOD 300
 
 #define PIN_ACC_INT PIN_INT
+
+#define JD_USB_BRIDGE 1
+#define DUPLEX_UART 2
+#define DISABLE_PLL 1
+
+#define PIN_TX PIN_TX_MOSI
+#define PIN_RX PIN_RX_CS
+
+#define JD_USB_QUEUE_SIZE 512
diff --git a/targets/star-brain/config.mk b/targets/star-brain/config.mk
index 3f919eb..755446c 100644
--- a/targets/star-brain/config.mk
+++ b/targets/star-brain/config.mk
@@ -1,4 +1,4 @@
 MCU = STM32G031x8
 JD_CLIENT = 1
-FLASH_SETTINGS_SIZE = 8
+FLASH_SETTINGS_SIZE = 6
 include $(PLATFORM)/mk/stm32g0.mk