STM32F1 LWIP netif link doesn't set up

[Romano1]

Hello,

I need some help about using LWIP on STM32F107VCT6 without RTOS using RAW API.

For the moment I just want to ping my board with a computer but the problem is that if I make an arp command my computer doesn't see my board. I have enable ICMP, TCP, ARP on LWIP configuration on my generated CubeMX project.

I have debug my project and in the fucntion ethernetif_set_link it says me that the netif set link is down. I think that the problem of LWIP configuration come frome here and more precisely from my varaible reg_value wich is equal to 0 so the netif link can't set up. My variable regvalue get is value from the function HAL_ETH_ReadPHYRegister.

So I think the problem is link to the register configuration of my ethernet controller (LAN8720A).

Is there anybody who know why my regvalue is never equal to 1 after the excution of this line in ethernetif.c :

regvalue &= PHY_LINKED_STATUS;

Here is the configuration register on my LAN8720A in LWIP:

/* Section 3: Common PHY Registers */
 
#define PHY_BCR ((uint16_t)0x00) /*!< Transceiver Basic Control Register */
#define PHY_BSR ((uint16_t)0x01) /*!< Transceiver Basic Status Register */
 
#define PHY_RESET ((uint16_t)0x8000) /*!< PHY Reset */
#define PHY_LOOPBACK ((uint16_t)0x4000) /*!< Select loop-back mode */
#define PHY_FULLDUPLEX_100M ((uint16_t)0x2100) /*!< Set the full-duplex mode at 100 Mb/s */
#define PHY_HALFDUPLEX_100M ((uint16_t)0x2000) /*!< Set the half-duplex mode at 100 Mb/s */
#define PHY_FULLDUPLEX_10M ((uint16_t)0x0100) /*!< Set the full-duplex mode at 10 Mb/s */
#define PHY_HALFDUPLEX_10M ((uint16_t)0x0000) /*!< Set the half-duplex mode at 10 Mb/s */
#define PHY_AUTONEGOTIATION ((uint16_t)0x1000) /*!< Enable auto-negotiation function */
#define PHY_RESTART_AUTONEGOTIATION ((uint16_t)0x0200) /*!< Restart auto-negotiation function */
#define PHY_POWERDOWN ((uint16_t)0x0800) /*!< Select the power down mode */
#define PHY_ISOLATE ((uint16_t)0x0400) /*!< Isolate PHY from MII */
 
#define PHY_AUTONEGO_COMPLETE ((uint16_t)0x0020) /*!< Auto-Negotiation process completed */
#define PHY_LINKED_STATUS ((uint16_t)0x0004) /*!< Valid link established */
#define PHY_JABBER_DETECTION ((uint16_t)0x0002) /*!< Jabber condition detected */
 
/* Section 4: Extended PHY Registers */
#define PHY_SR ((uint16_t)0x1FU) /*!< PHY status register Offset */
 
#define PHY_SPEED_STATUS ((uint16_t)0x0004U) /*!< PHY Speed mask */
#define PHY_DUPLEX_STATUS ((uint16_t)0x0010U) /*!< PHY Duplex mask */
 
#define PHY_ISFR ((uint16_t)0x001DU) /*!< PHY Interrupt Source Flag register Offset */
#define PHY_ISFR_INT4 ((uint16_t)0x0010U) /*!< PHY Link down inturrupt */

Here is my main code :

int main(void)
{
 
 HAL_Init();
 
 SystemClock_Config();
 
 MX_GPIO_Init();
 MX_LWIP_Init();
 
 /* tcp echo server Init */
 tcp_echoserver_init();
 
 while (1)
 {
	 ethernetif_set_link(&gnetif);
	 MX_LWIP_Process();
 }
}

Here is my config :

STM32CubeIDE version : 1.11.2

STM32CubeMX version : 6.7.0

MCU : STM32F107VCT6

STM32F1 firmware : 1.8.4

Board : EasyMx PRO v7

Ethernet Controller : LAN8720A