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Original question:

RTOS/TMS570LC4357: How can i use to lwIP at RTOS

TMS570LC4357: HDK LwIP example. EMACTxIntHandler hangs

user6229441
Prodigy 90 points
Part Number: TMS570LC4357

I have implemented 's LwIP FreeRTOS example on a TMS570LC4357 HDK and am having an issue that is hard to resolve. To set up the project for building I had to

  • Modify HL_emac.c on line 1760 to enable EMACTxIntISR and EMACRxIntISR
  • cd ~/ti/Hercules && git clone https://git.ti.com/git/hercules_examples/hercules_examples.git
  • Updated ${workspace_loc:/${ProjName}/example and ${workspace_loc:/${ProjName}/lwip-1.4.1 directories to point to ~/ti/Hercules/hercules_examples...

Over terminal I can see

HERCULES MICROCONTROLLERS
Texas Instruments
Little Endian device
Initializing ethernet (DHCP)
        DEBUG - Getting PHY ID....SUCCESS
        DEBUG - Getting PHY Alive Status...SUCCESS
        DEBUG - Getting PHY Link Status...SUCCESS
        DEBUG - Setting up Link...SUCCESS

The program hangs in EMACTxIntHandler on line 1538:

while(((EMACSwizzleData(curr_bd->flags_pktlen)) & EMAC_BUF_DESC_OWNER) == EMAC_BUF_DESC_OWNER)
{
}

I have read some posts about this issue but they have not helped so far.

https://e2e.ti.com/support/microcontrollers/hercules/f/312/t/551826?FreeRTOS-EMAC-on-RM57lx-launchpad-stuck-into-while-EMACSwizzleData-curr-bd-flags-pktlen-EMAC-BUF-DESC-OWNER-EMAC-BUF-DESC-OWNER-

https://e2e.ti.com/support/microcontrollers/hercules/f/312/t/445955?while-EMACSwizzleData-curr-bd-flags-pktlen-EMAC-BUF-DESC-OWNER-EMAC-BUF-DESC-OWNER-

I understand that  has put up quite a few helpful posts on this topic and may be able to provide some input. My project is attached.

TMS570LC4357_FreeRTOS_LWIP.zip

  • 0
    TI__Guru**** 192486 points

    Hello,

    Does the example (lwip demo or lwip active webserver) work on your board without using freeRTOS? If it works, pinmux and device configuration should be fine.

  • 0 in reply to QJ Wang
    TI__Guru**** 192486 points

    Hi,

    I just run the freeRTOS_lwip example shared with you before. It works on my DK without any issue. Both task1 and task2 work: two leds flashing, and content is displayed on web:

  • 0 in reply to QJ Wang
    Prodigy 90 points

    Thanks . I got to be bottom of the problem. The project you shared at e2e.ti.com/.../799670 (7178.TMS570LC4357_FreeRTOS_LWIP.7z), is incompatible with lwip v00.04.00 on the ti git server. In particular, VIM RAM assignments for EMACTxIntISR and EMACRxIntISR need to be renamed to be EMACCore0TxIsr and EMACCore0RxIsr. This explains why the ISR was never being called and the EMACTxIntHandler hung on line 1538.