TM4C1294NCPDT Ethernet handler not being called

Hello Kumar

Does the application code refer to the USERREGx for MAC address or the seperate location and does the factory-cfg->mac_address get the correct value of the MAC address?

Hi,

The application code refers to factory_cfg->mac_address and it does get the correct values.

Hello Kumar

Is the lwIPEthernetIntHandler mapped to the correct location in startup_ccs.c file. You can check against the freertos_demo in DK-TM4C129X examples in TivaWare.

Hi,

I checked that too...it is correct.

Hello Kumar,

First things first. if you take one of the existing Etherent examples like enet_lwip from TivaWare and run it on your device, then does the lwIP interrupt handler get triggered or not. This will help us isolate the root cause of the issue.

Hi Amit,

Thanks for the input i will try it. But i have a doubt, which platform do i choose from tivaware examples (dk / ek-tm4c1294xl). The device i use is a custom one, not sure if it will work directly without modifying it.

Also the ethernet leds on my board are connected on PF2 and PF3 pins. How do i map this to work with Tivaware API.

Thank you
kumar

Hi Kumar,

>Also the ethernet leds on my board are connected on PF2 and PF3 pins. How do i map this to work with Tivaware API.

You have to do an extended write of the EMAC address register to configure the link/activity LEDS registers. We set the LED with a custom define but you need to figure your LED's to configure.

#define EMAC_PHY_PF0LED0LNK_PF4LED1ACTY     0x00000510
#define EMAC_PHY_PF0LED0LNK_PF1LED2ACTY     0x00000150

    MAP_EMACPHYExtendedWrite(EMAC0_BASE, EMAC_MIIADDR_PLA_M, EPHY_LEDCFG, EMAC_PHY_PF0LED0LNK_PF4LED1ACTY);
    MAP_EMACPHYExtendedWrite(EMAC0_BASE, EMAC_MIIADDR_PLA_M, EPHY_LEDCR, EPHY_LEDCR_BLINKRATE_5HZ);

Hello Kumar

The EK-TM4C1294XL examples would be simpler to modify as it uses UART for display rather than the DK-TM4C129x which uses the display panel.

Hi,

I figured out the issue why ethernet handler was not called. It is a config issue in lwip. I had set the TCPIP stack size and  2048 and also same for MEM_ALIGN_SIZE. basically the lwip would not create the task which will not initialize the ethernet handler too. 

Can we use GPIOPinTypeEthernetLED this to configure ethernet leds for port F pin 2 and pin 4.

Thanks 

Kumar

Hello Kumar

If the GPIO pins for LED is PF2 and PF4 then yes, the API can be used to configure them for LED function.

Hi,

I am executing the following in the main pinout call. GPIO pins connected to ethernet led are PF2 and PF3 (not PF4).

SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOF);
GPIOPinTypeEthernetLED(GPIO_PORTF_BASE, GPIO_PIN_2 | GPIO_PIN_3);
GPIOPinTypeGPIOOutput(GPIO_PORTF_BASE,GPIO_PIN_2 |GPIO_PIN_3);
GPIOIntEnable(GPIO_PORTF_BASE, GPIO_PIN_2 | GPIO_PIN_3 );

I still dont see the ethernet leds up.

Any thing i am doing wrong here.

Thank you
kumar

Hi,

I have made the modifications in the hardware and now i am using PF0 and PF4. But i see after doing the following
GPIOPinConfigure(GPIO_PF0_EN0LED0);
GPIOPinConfigure(GPIO_PF4_EN0LED1);
GPIOPinTypeEthernetLED(GPIO_PORTF_BASE, GPIO_PIN_0 | GPIO_PIN_4);

Only Green Led is blinking when plugged in and on removing both are on.

If i add HWREG(EMAC0_BASE + EMAC_O_CC) |= EMAC_CC_POL; after EMACPHYConfigSet in lwiplib.c, i see it works but it is reversed (green is blinking and amber is constant and on unplugging it is off.

Is there any way to reverse this from code (blinking amber and constant green).

THank you
Kumar

Hello Kumar,

Please check the PHY LED Configuration register corresponding to the LED0 and LED1. What are they being set for?

Hello Kumar

I don't think leaving the debug open with the incorrect LED status would be a good to have in the final product.