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TMS320C6657: CCS

cy w

Prodigy 20 points

Part Number: TMS320C6657

用NDK做网络通信，用sendto发送10240字节，返回值为10240，表示发送成功，但对方用wirshark抓包工具抓不到数据。如果发送1024字节，都正常。请问是什么原因？

0 Shine 2 months ago

TI__Guru**** 322217 points

请尝试使用C:\ti\ndk_2_24_03_35\packages\ti\ndk\winapps.
https://www.ti.com/lit/an/sprac57/sprac57.pdf

0 cy w 2 months ago in reply to Shine

Prodigy 20 points

你好！非常感谢您的回复。NDK我们一直在用，网上低于1024字节的传输没问题，目前是需要传输一包16K字节的数据，不成功。按照“Enabling Jumbo Packet Support for C6678”和“Rebuilding The NDK Core Using Gmake - Texas Instruments Wiki ”两个文件重新构建了NDK和NIMU库，还是不成功，请求帮助！谢谢！

0 Shine 2 months ago in reply to cy w

TI__Guru**** 322217 points

请问使用的是最新的NDK吗？具体怎么不成功？打印信息是什么？

0 cy w 2 months ago in reply to Shine

Prodigy 20 points

My software versions are:

BIOS_MCSDK_2_1_2_6

NDK_2_23_02_03

pdk_C6678_1_1_2_6

Bios_6_33_06_50

xdias_7_21_01_07

xdctools_3_23_04_60

Compiler c6000_7.4.4

不成功表现为，PBM_alloc(10236)始终失败，如下：

程序一直只能到continue，到不了该程序的Line 771。

谢谢！

0 Shine 2 months ago in reply to cy w

TI__Guru**** 322217 points

请参考一下下面的帖子是否有帮助？
https://e2e.ti.com/support/processors-group/processors/f/processors-forum/107053/pbm_alloc-for-transmit-packets

0 cy w 2 months ago in reply to Shine

Prodigy 20 points

参考了这个帖子，我修改了配置，如下：

没有改善。

0 cy w 2 months ago in reply to cy w

Prodigy 20 points

而且，在重建NIMU库的时候，如果不加 _INCLUDE_JUMBOFRAME_SUPPORT，一次可以sendto 2048字节，但是加了该选项，一次发倒是只能发送1024字节，什么原因呢？

0 Shine 2 months ago in reply to cy w

TI__Guru**** 322217 points

已把您的问题升级到英文e2e论坛，请关注下面帖子的回复。
https://e2e.ti.com/support/processors-group/processors/f/processors-forum/1209019/tms320c6657-ndk-can-t-sendto-10240-bytes

0 Shine 2 months ago in reply to cy w

TI__Guru**** 322217 points

抱歉回复晚了！

请看下面e2e工程师的回复。

Would you please confirm that the customer has done the following,

1. The libraries and application would have to be recompiled with the following pre-processor definition added: _INCLUDE_JUMBOFRAME_SUPPORT.

2. The Jumbo frame support can be built into an application by linking with libraries compiled for Jumbo frame support.

( The NDK core stack can support Jumbo frames (packet sizes larger than 1500 bytes) also -

_INCLUDE_JUMBOFRAME_SUPPORT -- If defined, packet sizes larger than 1500 bytes are supported..

---

To rebuild the NDK, please download and follow the steps given here:-

4130.Rebuilding the NDK Core - Texas Instruments Wiki.pdf

0820.Rebuilding The NDK Core Using Gmake - Texas Instruments Wiki.pdf