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authorhathach <[email protected]>2026-03-12 12:16:57 +0700
committerhathach <[email protected]>2026-03-12 12:25:59 +0700
commitaea4f6046e9a07d5f169de9fcc31bca2b667ea45 (patch)
treec40350fb2cd9d4ccaea8b82952aaee818a482b2e /examples/device/cdc_msc/src
parent78bbc7dc2e80daba79351bc37e11b13243fd6f8c (diff)
refactor(vendor/cdc): add CFG_TUD_CDC_RX_NEED_ZLP and CFG_TUD_VENDOR_RX_NEED_ZLP
Diffstat (limited to 'examples/device/cdc_msc/src')
-rw-r--r--examples/device/cdc_msc/src/tusb_config.h4
1 files changed, 2 insertions, 2 deletions
diff --git a/examples/device/cdc_msc/src/tusb_config.h b/examples/device/cdc_msc/src/tusb_config.h
index c4f4374a2..f0709d8fb 100644
--- a/examples/device/cdc_msc/src/tusb_config.h
+++ b/examples/device/cdc_msc/src/tusb_config.h
@@ -103,8 +103,8 @@
#define CFG_TUD_CDC_RX_BUFSIZE (TUD_OPT_HIGH_SPEED ? 512 : 64)
#define CFG_TUD_CDC_TX_BUFSIZE (TUD_OPT_HIGH_SPEED ? 512 : 64)
-// CDC Endpoint transfer buffer size, more is faster
-// Only increase RX_EPSIZE if your host driver/application support zero-length packet (ZLP)
+// CDC Endpoint transfer buffer size, default to max bulk packet size (HS 512, FS 64). Larger is faster.
+// Larger RX_EPSIZE requires CFG_TUD_CDC_RX_NEED_ZLP = 1 and host ZLP support
#define CFG_TUD_CDC_RX_EPSIZE (TUD_OPT_HIGH_SPEED ? 512 : 64)
#define CFG_TUD_CDC_TX_EPSIZE (TUD_OPT_HIGH_SPEED ? 512 : 64)