altos/stmf0: Use double buffering for ChaosKey

[fw/altos] / src / stmf0 / stm32f0.h

diff --git a/src/stmf0/stm32f0.h b/src/stmf0/stm32f0.h
index 277fa223aa0b98ebed1a82c17b782d1dca1638c0..968c1295cda4072e2c7cc0766dd8efeecadf07ca 100644 (file)
--- a/src/stmf0/stm32f0.h
+++ b/src/stmf0/stm32f0.h
@@ -2000,7 +2000,12 @@ union stm_usb_bdt {
 
 #define STM_USB_BDT_SIZE       8
 
+/* We'll use the first block of usb SRAM for the BDT */
 extern uint8_t stm_usb_sram[] __attribute__((aligned(4)));
+extern union stm_usb_bdt stm_usb_bdt[STM_USB_BDT_SIZE] __attribute__((aligned(4)));
+
+#define stm_usb_sram   ((uint8_t *) 0x40006000)
+#define stm_usb_bdt    ((union stm_usb_bdt *) 0x40006000)
 
 struct stm_exti {
        vuint32_t       imr;