Hello everyone,
Here is the code I used to get my IP using DHCP,How do I use this IP to send and receive UDP or TCP? Using custom mac is this how I use it inside dts below?
#define DHCP_OPTION_NTP (42)
static uint8_t ntp_server[4];
static struct net_mgmt_event_callback mgmt_cb;
static struct net_dhcpv4_option_callback dhcp_cb;
static void handler(struct net_mgmt_event_callback *cb, uint32_t mgmt_event,
struct net_if *iface)
{
int i = 0;
if (mgmt_event != NET_EVENT_IPV4_ADDR_ADD) {
return;
}
for (i = 0; i < NET_IF_MAX_IPV4_ADDR; i++) {
char buf[NET_IPV4_ADDR_LEN];
if (iface->config.ip.ipv4->unicast[i].addr_type != NET_ADDR_DHCP) {
continue;
}
LOG_INF(" Address[%d]: %s", net_if_get_by_iface(iface),
net_addr_ntop(
AF_INET, &iface->config.ip.ipv4->unicast[i].address.in_addr,
buf, sizeof(buf)));
client_addr = &iface->config.ip.ipv4->unicast[i].address.in_addr;
LOG_INF(" Subnet[%d]: %s", net_if_get_by_iface(iface),
net_addr_ntop(AF_INET, &iface->config.ip.ipv4->netmask, buf,
sizeof(buf)));
LOG_INF(" Router[%d]: %s", net_if_get_by_iface(iface),
net_addr_ntop(AF_INET, &iface->config.ip.ipv4->gw, buf,
sizeof(buf)));
LOG_INF("Lease time[%d]: %u seconds", net_if_get_by_iface(iface),
iface->config.dhcpv4.lease_time);
k_sem_give(&m_udp);
}
}
static void option_handler(struct net_dhcpv4_option_callback *cb, size_t length,
enum net_dhcpv4_msg_type msg_type,
struct net_if *iface)
{
char buf[NET_IPV4_ADDR_LEN];
LOG_INF("DHCP Option %d: %s", cb->option,
net_addr_ntop(AF_INET, cb->data, buf, sizeof(buf)));
}
int main(void)
{
iface = net_if_get_default();
LOG_INF("Run dhcpv4 client");
net_mgmt_init_event_callback(&mgmt_cb, handler, NET_EVENT_IPV4_ADDR_ADD);
net_mgmt_add_event_callback(&mgmt_cb);
net_dhcpv4_init_option_callback(&dhcp_cb, option_handler, DHCP_OPTION_NTP,
ntp_server, sizeof(ntp_server));
net_dhcpv4_add_option_callback(&dhcp_cb);
LOG_INF("Start on %s: index=%d", net_if_get_device(iface)->name,
net_if_get_by_iface(iface));
net_dhcpv4_start(iface);
return 0;
}
Prj.conf file
CONFIG_NET_L2_ETHERNET=y
CONFIG_NET_IPV6=n
CONFIG_NETWORKING=y
CONFIG_NET_IPV4=y
CONFIG_NET_DHCPV4=y
CONFIG_NET_DHCPV4_OPTION_CALLBACKS=y
CONFIG_NET_SHELL=y
CONFIG_NET_LOG=y
Custom board
&spi1 {
compatible = "nordic,nrf-spi";
status = "okay";
pinctrl-0 = < &spi1_default >;
pinctrl-1 = < &spi1_sleep >;
cs-gpios = <&gpio0 12 GPIO_ACTIVE_LOW>;
pinctrl-names = "default", "sleep";
spi_w5500: w5500@0 {
compatible = "wiznet,w5500";
local-mac-address = [02 08 dc 11 22 33];
reg = <0x0>;
spi-max-frequency = <80000000>;
int-gpios = <&gpio0 4 GPIO_ACTIVE_LOW>;
reset-gpios = <&gpio0 26 GPIO_ACTIVE_LOW>;
};
};