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UDP connection based on CMSIS library

Hello,

I need to send a UDP package with this function( netUDP_Send )

https://www.keil.com/pack/doc/mw/Network/html/group__udp__user__api.html#ga7a82db98b82300e5fd03ce1b7afb6cba

But I don't have remote IP and Port number. I have added a new variable to get remote IP and Port number but it shows me an error.

NET_ADDR4 addrUDP;

uint32_t udp_cb_func (int32_t socket, const NET_ADDR *addr, const uint8_t *buf, uint32_t len) {
addrUDP=addr;
return 0;
}

How can I send a UDP package?

Parents

0 Parisa Mohamadi over 5 years ago in reply to Andy Neil

I really appreciate your response.

I have set my device to 192.168.1.100 and it is activated in my network( it responds to ping command). But I cant received anything. Here is my code

int main (void){

netInitialize ();
Eth();

while(1){
Sendd();
osDelay(100);

}

}


NET_ADDR4 addrUDP={ NET_ADDR_IP4, 5022, 192, 168, 1, 10 };

uint32_t udp_cb_func (int32_t socket, const NET_ADDR *addr, const uint8_t *buf, uint32_t len) {
	//addrUDP=addr;
	return 0;
}



void Eth(){
	
uint8_t mac_addr [NET_ADDR_ETH_LEN];
uint8_t ip4_addr [NET_ADDR_IP4_LEN];


netIP_aton ("192.168.1.100", NET_ADDR_IP4, ip4_addr);

while (netARP_GetMAC (NET_IF_CLASS_ETH | 0, ip4_addr, mac_addr) != netOK) {
  netARP_CacheIP (NET_IF_CLASS_ETH | 0, ip4_addr, netARP_CacheTemporaryIP);
  osDelay (1000);
}

socket = netUDP_GetSocket(udp_cb_func);
if (socket >= 0) {
netUDP_Open(socket, 2050);
}


void Sendd(void){

				
				sprintf(buf,"H%d",1);
				sendbuf =  netUDP_GetBuffer (2);
				State=netUDP_Send (socket,(NET_ADDR *)&addrUDP, buf,2);	
				
				if(State!=netOK){
					netUDP_Close(socket);
					socket = netUDP_GetSocket(udp_cb_func);
					if (socket >= 0) {
								netUDP_Open(socket, 2050);
								netUDP_SetOption (socket, netUDP_OptionTTL, 2);
						}
					}
}

I need to do two work.

1) Obtaining remote IP address without inserting into my code (192.168.1.10)

2) Sending a simple UDP package.

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