-/* HCLK = 12MHz usb / 2MHz battery */
-#define AO_AHB_PRESCALER (ao_on_battery ? 16 : 1)
-#define AO_RCC_CFGR_HPRE_DIV (ao_on_battery ? STM_RCC_CFGR_HPRE_DIV_16 : STM_RCC_CFGR_HPRE_DIV_1)
-
-/* APB = 12MHz usb / 2MHz battery */
-#define AO_APB_PRESCALER 1
-#define AO_RCC_CFGR_PPRE_DIV STM_RCC_CFGR_PPRE_DIV_1
-
-#define HAS_USB 1
-#define AO_PA11_PA12_RMP 1
+/* APB = MSI */
+#define AO_APB1_PRESCALER (1)
+#define AO_APB2_PRESCALER (1)
+#define AO_RCC_CFGR_PPRE_DIV (STM_RCC_CFGR_PPRE_DIV_1)