Have to wait 30 secondes before ping

Question

Hello, I am working with an arduino mega with W5500 Ethernet Shield (the red one from wiznet). I am writing a bootloader. Here is a very basic bootloader: int main(void) { _delay_ms(500); // Spi init SPI_PORT = _BV(SCK) | _BV(MISO) | _BV(MOSI) | _BV(SS); SPI_DDR = _BV(SCK) | _BV(MOSI) | _BV(SS); ETH_PORT |= _BV(ETH_SS); ETH_DDR |= _BV(ETH_SS); SD_PORT |= _BV(SD_SS); SD_DDR |= _BV(SD_SS); SPSR = (1 << SPI2X); _delay_ms(500); // Network init for (int i=0; i<8 ; i++) // MAX_SOCK_NUM { uint8_t cntl_byte = (0x0C + (i<<5)); spiWriteReg(0x1E, cntl_byte, 2);//0x1E - Sn_RXBUF_SIZE spiWriteReg(0x1F, cntl_byte, 2);//0x1F - Sn_TXBUF_SIZE } uint8_t registerBuffer[28] = { 0x80, // MR Mode - reset device // EEPROM block starts here 192,168,0,254, // GWR Gateway IP Address Register 255,255,255,0, // SUBR Subnet Mask Register 0xDE,0xAD,0xBE,0xEF,0xFE,0xE0, // SHAR Source Hardware Address Register 192,168,0,100, // SIPR Source IP Address Register // EEPROM block ends here 0, 0, // Interrupt Low Level Timer (INTLEVEL0), (INTLEVEL1) (0x0013, 0x0014) 0, // IR Interrupt Register (0x0015) 0, // IMR Interrupt Mask Register (0x0016) 0, // Socket Interrupt (SIR) (0x0017) 0, // Socket Interrupt Mask (SIMR) (0x0018) 0x07, 0xd0, // RTR Retry Time-value Register ((RTR0),(RTR0)) (0x0019,0x001A) 0x08, // RCR Retry Count Register (0x001B) }; for(int i = 0; i < 28; i++) { spiWriteReg(i, 0x04 , registerBuffer[i]); } I do not understand why but i have to wait about 30 seconds between power up and the first ping response. Why does w5500 takes 30 seconds to setup ? I have tried the same program on old officiel arduino Ethernet Shield 2 and i do not have this problem. This shield has the same w5500 chip… Thanks

becky · Answer

Hello, Are all conditions the same except for the Ethernet shield? I want to see wireshark capture

exammoes exammoes · Answer

There is nothing. The shield does not say anything before 30 seconds. I have notice the pin 2 is connected on int on w5500 shield whereas it is not connected on arduino official shield