Activate HW Interrupt in W5500

Question

Hello, I’m trying to enable HW INT on w5500 with STM32H7. I’m sending and receiving UDP packages successfully but can’t see any rise edge on INT pin. Here my code block for turn on hw interrupt. void w5500Init(){ . . . setIMR(0x04); setSIMR(0x01); setINTLEVEL(30); . . } What’s wrong I couldn’t get. Thanks.

becky · Answer

Hardware Interrupt Pin of W5500 is a falling edge. If an interrupt occurs in HIGH state, it is converted to LOW, and it is converted to HIGH when you clear the interrupt.

becky · Answer

To generate an interrupt in the socket’s recv timing, masking is required in the sn_imr and simr registers. If udp socket is socket 0, set SIMR (0x01). murseloguzandic: setSn_IMR(w5500.socketNumber, 0x04); This is correct masking to get the recv interrupt. image585×630 55 KB

murseloguzandic · Answer

I’m using like this. w5500.result = socket(w5500.socketNumber, Sn_MR_UDP, w5500.localPort, 0); // 0 -> No flag need at UDP setINTLEVEL(500); setSIMR(0x01); setSn_IMR(w5500.socketNumber, 0x04); Still no falling signal occurs.

murseloguzandic · Answer

Should I clear or reset interrupts somewhere in my loop?

Mert Gulsoy · Answer

Here how I use it: // Soket 0 için Interrupt enable yaparız. reg_tmp = ETH_SIR_S0_INT; // Socket 0 if ( (result = Eth_write_byte(ETH_BLOCK_SEL_C_REG, ETH_REG_SIMR, reg_tmp)) != SPI_OK ) return result; // Soket 0 durum interruptlarını aktif yaparız. reg_tmp = ETH_Sn_IR_SENDOK | ETH_Sn_IR_RECV | ETH_Sn_IR_TIMEOUT; //enable socket 0 interrupts if ( (result = Eth_write_byte(ETH_BLOCK_SEL_S_REG, ETH_REG_Sn_IMR, reg_tmp)) != SPI_OK ) return result; And I clean the Sn_IR like: uint8_t tmp2 = 0xFF; //Rastgele bir değer Eth_getSocketIR(&tmp2); Eth_setSocketIR(tmp2); // IR reg temizlenir. Although I have a hardware problem, I still can see the interrupt pin and related interrupts are working. My hardware problem is possibly copper pour between w5500 lines.