using LWIP with SYS/BIOS

hossam adel

hello,

i'm using lwip lib to connect AM437x IDK to AM437x EVM over udp connection and i did it without SYS/BIOS, when i need to integrate SYS/BIOS i get some issue like "i can't use MMUConfigAndEnable(); function" and i forced to use SDKMMUInit(applMmuEntries); function so i can't make this connection again !!

any suggest to solve this issue for using MMUConfigAndEnable(); or for building correct applMmuEntries[] to enable Ethernet connection ?

over 10 years ago

0 Ki over 10 years ago

TI__Guru**** 464431 points

Hello,
I will move this thread to the TI-RTOS forum where the experts there can help you best.

Thanks
ki

0 Ashish Kapania over 9 years ago

TI__Mastermind 21645 points

Hi Hossam,

Since you are integrating your application with SYS/BIOS, I would recommend using SDKMMUInit() as it internally calls SYS/BIOS APIs to setup the MMU. MMUConfigAndEnable() uses starterware APIs which may conflict with the SYS/BIOS MMU module.

Best,

Ashish

0 hossam adel over 9 years ago in reply to Ashish Kapania

Intellectual 290 points

I did it, so I ask about how to make correct configuration to use Ethernet connection "correct addresses as in my example "?

Thanks,
Hossam

0 Ashish Kapania over 9 years ago in reply to hossam adel

TI__Mastermind 21645 points

Hi Hossam,

Since you already have a working bare-metal app, you can reuse its MMU configuration.

Can you share the MMUConfigAndEnable() function you are currently using ? I can guide you how to translate its MMU settings into applMmuEntries.

Best,

Ashish

0 hossam adel over 9 years ago in reply to Ashish Kapania

Intellectual 290 points

thanks for replaying, i solved this issue.

now, i have another issue :

lwip used puf_alloc() function and it's gets run time error .. how integrate it with BIOS/SYS to run correctly ..

thanks

hossam

0 Ashish Kapania over 9 years ago in reply to hossam adel

TI__Mastermind 21645 points

Hi Hossam,

Is pbuf_alloc() internally calling malloc() ? Can you post the run time error message you are getting ?

Best,
Ashish

0 hossam adel over 9 years ago in reply to Ashish Kapania

Intellectual 290 points

Thank you for your reply ,

when I'm running the lwip UDP under sys/bios the program runs correctly and sends only 200 correct packets , then it got an exception error after it send 1488 packet. The following code represent the API code used for sending data :

err_t udp_send_app(uint8_t *msg, uint16_t lenght, udpConfig_t * obj) {

   obj->p = pbuf_alloc(PBUF_TRANSPORT, lenght, PBUF_RAM);
   memcpy(obj->p->payload, msg, lenght);
   udp_sendto(obj->ptel_pcb, obj->p, IP_ADDR_BROADCAST, obj->tx_port);
   pbuf_free(obj->p); //De-allocate packet buffer

   return S_PASS;
}

and the following attached image will show you the error which i'm facing :

0 hossam adel over 9 years ago in reply to Ashish Kapania

Intellectual 290 points

yes, it's use mem_malloc() function

0 Ashish Kapania over 9 years ago in reply to hossam adel

TI__Mastermind 21645 points

Hi Hossam,

I don't see the exception msg in the screenshot you shared. Are you referring to the "Can't find a source file at ..." msg in the screenshot ? If yes, that msg does not really indicate an error. It just means that CCS editor's source code browser is unable to find the source file corresponding to the code currently executing. You can click on "Locate File..." and point it to the right file in the SYS/BIOS product.

Best,

Ashish

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using LWIP with SYS/BIOS