cdc work ok with lpc43xx

1 files changed, 13 insertions, 5 deletions

diff --git a/examples/device/cdc_msc_hid/src/tusb_config.h b/examples/device/cdc_msc_hid/src/tusb_config.h
index 3af109188..9bc97ecff 100644
--- a/examples/device/cdc_msc_hid/src/tusb_config.h
+++ b/examples/device/cdc_msc_hid/src/tusb_config.h
@@ -58,16 +58,24 @@
 #define CFG_TUSB_DEBUG              2
 #define CFG_TUSB_OS                 OPT_OS_NONE
 
-//--------------------------------------------------------------------
-// USB RAM PLACEMENT
-//--------------------------------------------------------------------
-#define CFG_TUSB_ATTR_USBRAM
+/* USB DMA on some MCUs can only access a specific SRAM region with restriction on alignment.
+ * Tinyusb use follows macros to declare transferring memory so that they can be put
+ * into those specific section.
+ * e.g
+ * - CFG_TUSB_MEM SECTION : __attribute__ (( section(".usb_ram") ))
+ * - CFG_TUSB_MEM_ALIGN   : __attribute__ ((aligned(4)))
+ */
+#ifndef CFG_TUSB_MEM_SECTION
+#define CFG_TUSB_MEM_SECTION
+#endif
+
+#ifndef CFG_TUSB_MEM_ALIGN
 #define CFG_TUSB_MEM_ALIGN          ATTR_ALIGNED(4)
+#endif
 
 //--------------------------------------------------------------------
 // DEVICE CONFIGURATION
 //--------------------------------------------------------------------
-
 #define CFG_TUD_ENDOINT0_SIZE       64
 
 /*------------- Descriptors -------------*/