diff options
| author | sakumisu <[email protected]> | 2024-05-03 20:34:13 +0800 |
|---|---|---|
| committer | sakumisu <[email protected]> | 2024-05-03 20:34:13 +0800 |
| commit | 102801e45ce6b58f101a67967e9c239b5bed88b4 (patch) | |
| tree | 7bed6c685217af6c1d7b7228a68b812d981a2b25 | |
| parent | 0ceb7ef885f15e0aad9b7c6beac51e249e52385f (diff) | |
add comments for macros
| -rw-r--r-- | cherryusb_config_template.h | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/cherryusb_config_template.h b/cherryusb_config_template.h index 008ff921..f515099b 100644 --- a/cherryusb_config_template.h +++ b/cherryusb_config_template.h @@ -145,21 +145,24 @@ #endif /* This parameter affects usb performance, and depends on (TCP_WND)tcp eceive windows size, - * you can change with 2K,4K,8K,16K,default is 2K to get one TCP_MSS + * you can change to 2K ~ 16K and must be larger than TCP RX windows size in order to avoid being overflow. */ #ifndef CONFIG_USBHOST_RNDIS_ETH_MAX_RX_SIZE #define CONFIG_USBHOST_RNDIS_ETH_MAX_RX_SIZE (2048) #endif + +/* Because lwip do not support multi pbuf at a time, so increasing this variable has no performance improvement */ #ifndef CONFIG_USBHOST_RNDIS_ETH_MAX_TX_SIZE #define CONFIG_USBHOST_RNDIS_ETH_MAX_TX_SIZE (2048) #endif /* This parameter affects usb performance, and depends on (TCP_WND)tcp eceive windows size, - * you can change with 2K,4K,8K,16K,default is 2K to get one TCP_MSS + * you can change to 2K ~ 16K and must be larger than TCP RX windows size in order to avoid being overflow. */ #ifndef CONFIG_USBHOST_CDC_NCM_ETH_MAX_RX_SIZE #define CONFIG_USBHOST_CDC_NCM_ETH_MAX_RX_SIZE (2048) #endif +/* Because lwip do not support multi pbuf at a time, so increasing this variable has no performance improvement */ #ifndef CONFIG_USBHOST_CDC_NCM_ETH_MAX_TX_SIZE #define CONFIG_USBHOST_CDC_NCM_ETH_MAX_TX_SIZE (2048) #endif |