143 lines
3.8 KiB
C
143 lines
3.8 KiB
C
#include "lwip.h"
|
|
#include "lwip/init.h"
|
|
#include "lwip/netif.h"
|
|
#include "lwip/opt.h"
|
|
#include "lwip/mem.h"
|
|
#include "lwip/memp.h"
|
|
#include "lwip/udp.h"
|
|
#include "lwip/timeouts.h"
|
|
#include "netif/etharp.h"
|
|
|
|
#define UDP_RX_BUFFER_SIZE 128
|
|
|
|
void Error_Handler(void);
|
|
|
|
struct udp_pcb *upcb;
|
|
ip_addr_t remote_ip;
|
|
const uint16_t remote_port = 5678;
|
|
|
|
struct netif gnetif;
|
|
ip4_addr_t ipaddr;
|
|
ip4_addr_t netmask;
|
|
ip4_addr_t gw;
|
|
uint8_t IP_ADDRESS[4];
|
|
uint8_t NETMASK_ADDRESS[4];
|
|
uint8_t GATEWAY_ADDRESS[4];
|
|
|
|
static char udp_receive_buffer[UDP_RX_BUFFER_SIZE];
|
|
|
|
void udp_receive_callback(void *arg, struct udp_pcb *upcb, struct pbuf *p, const ip_addr_t *addr, u16_t port);
|
|
|
|
void udp_receive_callback(void *arg, struct udp_pcb *upcb, struct pbuf *p, const ip_addr_t *addr, u16_t port) {
|
|
strncpy(udp_receive_buffer,p->payload,p->len);
|
|
udp_receive_buffer[p->len]=0;
|
|
// printf("Test\r\n");
|
|
printf("%s\r\n", udp_receive_buffer);
|
|
pbuf_free(p);
|
|
GPIO_ToggleBits(GPIOD, GPIO_Pin_0);
|
|
}
|
|
|
|
void udpServer_init(void)
|
|
{
|
|
ip_addr_t local_ip;
|
|
uint16_t local_port = 1234;
|
|
uint16_t remote_port = 5678;
|
|
err_t err;
|
|
|
|
upcb = udp_new();
|
|
|
|
if(upcb != NULL) {
|
|
IP_ADDR4(&local_ip, 192, 168, 1, 66);
|
|
err = udp_bind(upcb, &local_ip, local_port);
|
|
if (err == ERR_OK) {
|
|
// printf("UDP bind\r\n");
|
|
}
|
|
IP4_ADDR(&remote_ip, 192, 168, 1, 111);
|
|
// err= udp_connect(upcb, &remote_ip, remote_port);
|
|
if (err == ERR_OK) {
|
|
// printf("UDP connect\r\n");
|
|
udp_recv(upcb, udp_receive_callback, NULL);
|
|
}
|
|
}
|
|
else
|
|
{
|
|
udp_remove(upcb);
|
|
}
|
|
}
|
|
|
|
void udp_send_data(const char *data, u16_t len)
|
|
{
|
|
struct pbuf *p;
|
|
err_t err;
|
|
|
|
p = pbuf_alloc(PBUF_TRANSPORT, len, PBUF_RAM);
|
|
if (p != NULL)
|
|
{
|
|
memcpy(p->payload, data, len);
|
|
err = udp_sendto(upcb, p, &remote_ip, remote_port);
|
|
pbuf_free(p);
|
|
if (err != ERR_OK)
|
|
{
|
|
|
|
}
|
|
}
|
|
}
|
|
|
|
void lwipInit(void)
|
|
{
|
|
IP_ADDRESS[0] = 192;
|
|
IP_ADDRESS[1] = 168;
|
|
IP_ADDRESS[2] = 1;
|
|
IP_ADDRESS[3] = 66;
|
|
NETMASK_ADDRESS[0] = 255;
|
|
NETMASK_ADDRESS[1] = 255;
|
|
NETMASK_ADDRESS[2] = 0;
|
|
NETMASK_ADDRESS[3] = 0;
|
|
GATEWAY_ADDRESS[0] = 0;
|
|
GATEWAY_ADDRESS[1] = 0;
|
|
GATEWAY_ADDRESS[2] = 0;
|
|
GATEWAY_ADDRESS[3] = 0;
|
|
|
|
/* Initilialize the LwIP stack without RTOS */
|
|
lwip_init();
|
|
|
|
IP4_ADDR(&ipaddr, IP_ADDRESS[0], IP_ADDRESS[1], IP_ADDRESS[2], IP_ADDRESS[3]);
|
|
IP4_ADDR(&netmask, NETMASK_ADDRESS[0], NETMASK_ADDRESS[1] , NETMASK_ADDRESS[2], NETMASK_ADDRESS[3]);
|
|
IP4_ADDR(&gw, GATEWAY_ADDRESS[0], GATEWAY_ADDRESS[1], GATEWAY_ADDRESS[2], GATEWAY_ADDRESS[3]);
|
|
|
|
/* add the network interface (IPv4/IPv6) without RTOS */
|
|
netif_add(&gnetif, &ipaddr, &netmask, &gw, NULL, ðernetif_init, ðernet_input);
|
|
|
|
/* Registers the default network interface */
|
|
netif_set_default(&gnetif);
|
|
|
|
if (netif_is_link_up(&gnetif))
|
|
{
|
|
/* When the netif is fully configured this function must be called */
|
|
netif_set_up(&gnetif);
|
|
}
|
|
else
|
|
{
|
|
/* When the netif link is down this function must be called */
|
|
netif_set_down(&gnetif);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* ----------------------------------------------------------------------
|
|
* Function given to help user to continue LwIP Initialization
|
|
* Up to user to complete or change this function ...
|
|
* Up to user to call this function in main.c in while (1) of main(void)
|
|
*-----------------------------------------------------------------------
|
|
* Read a received packet from the Ethernet buffers
|
|
* Send it to the lwIP stack for handling
|
|
* Handle timeouts if LWIP_TIMERS is set and without RTOS
|
|
* Handle the llink status if LWIP_NETIF_LINK_CALLBACK is set and without RTOS
|
|
*/
|
|
void lwipProcess(void)
|
|
{
|
|
ethernetif_input(&gnetif);
|
|
sys_check_timeouts();
|
|
}
|
|
|