Dhcp

Question

I use W5500 with STM32F051R8T6, my IDE is Keil. I ported some part of code to this chip and communication by SPI works well. I also have succes with STM32F103X CooCox CoIDE Project Loopback Test - works perfect. I have problem with DHCP client. When I run this project I have go HardFault. Here is my console output: [code]=== W5500 NET CONF : DHCP === MAC: 00:08:DC:00:AB:CD SIP: 192.168.1.123 GAR: 192.168.1.1 SUB: 255.255.255.0 DNS: 0.0.0.0 Send DHCP_DISCOVER DHCP message : 192.168.1.1(67) 345 received. Receive DHCP_OFFER Send DHCP_REQUEST DHCP message : 192.168.1.1(67) 345 received. Receive DHCP_ACK HardFault[/code] during debug I have found that hardfault is occur in this line: if(*((uint32_t*)addr) == 0) return SOCKERR_IPINVALID; in function int32_t sendto(uint8_t sn, uint8_t * buf, uint16_t len, uint8_t * addr, uint16_t port) What could be the problem?

MrBool · Answer

Hi, I checked and addr = 0x2000016B - address of variable DHCP_allocated_ip. You are right. This addr is not divied by 4. I change code to: if ((addr[0] | addr[1] | addr[2] | addr[3]) == 0) return SOCKERR_IPINVALID; and now everything is OK.