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-rw-r--r--examples/device/cdc_msc/src/tusb_config.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/examples/device/cdc_msc/src/tusb_config.h b/examples/device/cdc_msc/src/tusb_config.h
index fdb2ddf18..3f2f05f20 100644
--- a/examples/device/cdc_msc/src/tusb_config.h
+++ b/examples/device/cdc_msc/src/tusb_config.h
@@ -104,6 +104,8 @@
#define CFG_TUD_CDC_TX_BUFSIZE (TUD_OPT_HIGH_SPEED ? 512 : 64)
// CDC Endpoint transfer buffer size, more is faster
+// Leave it as default size (512 for HS, 64 for FS) unless your host application
+// is able to send ZLP (Zero Length Packet) to terminate transfer !
#define CFG_TUD_CDC_EP_BUFSIZE (TUD_OPT_HIGH_SPEED ? 512 : 64)
// MSC Buffer size of Device Mass storage