STM32H7S78-DK: Issues with ETH and LwIP

[BartekTaczala]

Hi,

I'm having a project that uses LTDC (565) UART4 (for printf debugging purposes) and ETH/LwIP. 

The issue i'm having is an infinite loop in `LAN8742_Init` : 

```

while(regvalue & LAN8742_BCR_SOFT_RESET)

```

always evalute to true and 

```

if((pObj->IO.GetTick() - tickstart) <= LAN8742_SW_RESET_TO)

``` 

evalutes to true as well (tickstart is 0 and pObj->IO.GetTick() also returns 0).

STM32CubeMX warns me about possible conflicts with PIN - but I don't think LTDC and UART/ETH are using the same pins. Ater enabling ETH CubeMX warned about Clock but autoresolver fixed the issue. 

[Pavel A.]

One of reasons can be failure of handshake with the PHY.

If you suspect conflict with other components, disable them and get the ETH working first.

> tickstart is 0 and pObj->IO.GetTick() also returns 0).

Maybe the PHY setup is broken too. Replace this to HAL_GetTick(). If HAL_GetTick keeps returning 0, the tick timer is broken. Too bad.

[EXUE.2]

it looks like the ETH phy communication is failed, below is my ETH initial code on STM32H7S3:

const u8 ETH_HEADER_PACKET[] =
{
0x05, 0x04, 0x03, 0x02, 0x01, 0x00, // Destination Address, 6 bytes
// 0xFF, 0xFF, 0x00, 0x00, 0x00, 0x00, //
0x02, 0x00, 0x00, 0x00, 0x00, 0x00, // Source Address, 6 bytes, ETH_MAC_ADDR0~5
0x00, 0x04 // Length/type, 2 bytes
};

uint32_t idx, duplex, speed = 0;

ETH_MACConfigTypeDef MACConf;
ETH_MACFilterConfigTypeDef FilterConfig;
uint8_t macaddress[6]= {ETH_MAC_ADDR0, ETH_MAC_ADDR1, ETH_MAC_ADDR2, ETH_MAC_ADDR3, ETH_MAC_ADDR4, ETH_MAC_ADDR5};

EthHandle.Instance = ETH;
EthHandle.Init.MACAddr = macaddress;
EthHandle.Init.MediaInterface = HAL_ETH_RMII_MODE;
EthHandle.Init.RxDesc = DMARxDscrTab;
EthHandle.Init.TxDesc = DMATxDscrTab;
EthHandle.Init.RxBuffLen = ETH_RX_BUFFER_SIZE;

/* configure ethernet peripheral (GPIOs, clocks, MAC, DMA) */
HAL_ETH_Init(&EthHandle);

for(idx = 0; idx < ETH_RX_DESC_CNT; idx ++)
{
HAL_ETH_DescAssignMemory(&EthHandle, idx, Rx_Buff[idx], NULL);
}

memset(&TxConfig, 0 , sizeof(ETH_TxPacketConfig));
TxConfig.Attributes = ETH_TX_PACKETS_FEATURES_CSUM | ETH_TX_PACKETS_FEATURES_CRCPAD;
TxConfig.ChecksumCtrl = ETH_CHECKSUM_IPHDR_PAYLOAD_INSERT_PHDR_CALC;
TxConfig.CRCPadCtrl = ETH_CRC_PAD_INSERT;

/* Set PHY IO functions */
LAN8742_RegisterBusIO(&LAN8742, &LAN8742_IOCtx);

/* Initialize the LAN8742 ETH PHY */
if(LAN8742_Init(&LAN8742)!= LAN8742_STATUS_OK)

{

Error_Handler();

}

[Pavel A.]

Well, then debug LAN8742_Init ?