RM46L852: lwip example and DHCP

Hi Armin,

The error message of "ERROR INITIALIZING HARDWARE" indicates that the ip address is not provided.

Can you try this kind of settings?

uint8 ip_addr[4] = { 192, 168, 2, 44 };
uint8 netmask[4] = { 255, 255, 255, 0 };
uint8 gateway[4] = { 192, 168, 2, 254 };

ipAddr = lwIPInit(0, macAddress, *((uint32_t *)ip_addr), *((uint32_t *)netmask), *((uint32_t *)gateway), IPADDR_USE_STATIC);

If you get the error again, please try to use DHCP to get a dynamic IP address:

ipAddr = lwIPInit(0, macAddress, 0, 0, 0, IPADDR_USE_DHCP);

Hi QJ Wang,

as I wrote the static Ip is working, getting dynamic Ip with DHCP didn‘t work.

Armin Erkert said:

as I wrote the static Ip is working, getting dynamic Ip with DHCP didn‘t work.

In the lwIPInit function in the lwiplib.c there is the following code:

 	dhcp_start(&hdkNetIF[instNum]);
 	count = 10;
 	/* Check for DHCP completion for 'count' number of times, each for the given delay. */
 		while(count--)

With the DHCP server I was using (in a broadband router) found had to increase the count from 10 to 100 as otherwise the LwIP code failed to get an IP address within the timeout.

Maybe increasing the value of count will help in your case.