RTOS/TM4C129ENCPDT: TM4C129ENCPDT TCP/IP

Sabina Greenberg101872

Expert 2780 points

Part Number: TM4C129ENCPDT

Tool/software: TI-RTOS

We work with CCS 7.2.13 and board TM4C129ENCPDT

After import and compiling tcpEcho_EK_TM4C1294XL_TI example we get the following SRAM memory:

SRAM used:0000ffe8 unused:00030018

We don't need so large buffers in TCP stuck and we reduced transmit&receive buffers size in TCP&UDP module configuration :
Tcp.transmitBufSize = 512;
Tcp.receiveBufSize = 512;
Udp.receiveBufSize = 1024;

and minimumSendBytes = 1024 in IP configuration:

So new configuration looks:

Global.lowTaskStackSize = 1024;
Global.normTaskStackSize = 1024;
Global.highTaskStackSize = 1024;
Tcp.transmitBufSize = 512;
Tcp.receiveBufSize = 512;
Tcp.receiveBufLimit = 1024;
Ip.socketBufMinTxSize = 1024;
Udp.receiveBufSize = 1024;

But after build the program its SRAM size is not changed.

What is the reason of it? it seems that we did something wrong...

Thanks,Sabina

over 8 years ago

0 ToddMullanix over 8 years ago

TI__Guru* 96960 points

Hi Sabina,

The changes you made will impact the runtime allocation, not the static size. Here's a comparison of the generated code in Debug\configPkg\package\cfg\tcpEcho_pem4f.c

Todd

0 Sabina Greenberg101872 over 8 years ago in reply to ToddMullanix

Expert 2780 points

thanks!

0 Sabina Greenberg101872 over 8 years ago in reply to Sabina Greenberg101872

Expert 2780 points

in my code i see the changed values:

Void ti_ndk_config_tcp_init(HANDLE hCfg)
{
{
Int transmitBufSize = 512;
CfgAddEntry(hCfg, CFGTAG_IP, CFGITEM_IP_SOCKTCPTXBUF,
CFG_ADDMODE_UNIQUE, sizeof(uint), (UINT8 *)&transmitBufSize, 0);
}
{
Int receiveBufSize = 512;
CfgAddEntry(hCfg, CFGTAG_IP, CFGITEM_IP_SOCKTCPRXBUF,
CFG_ADDMODE_UNIQUE, sizeof(uint), (UINT8 *)&receiveBufSize, 0);
}
{
Int receiveBufLimit = 1024;
CfgAddEntry(hCfg, CFGTAG_IP, CFGITEM_IP_SOCKTCPRXLIMIT,
CFG_ADDMODE_UNIQUE, sizeof(uint), (UINT8 *)&receiveBufLimit, 0);
}

}

What changes should we do in TCP/IP stack to change the RAM size of the SW ? We don't need so large buffers.

0 ToddMullanix over 8 years ago in reply to Sabina Greenberg101872

TI__Guru* 96960 points

Sabina,

Please refer to this processors.wiki.ti.com/.../TI-RTOS_Networking_Stack_Memory_Usage for details on the memory management. You should be able to reduce the size of the heap with the above settings.

Todd

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RTOS/TM4C129ENCPDT: TM4C129ENCPDT TCP/IP