/**
* Receive a single packet.
* The contents will be placed in uip_buf, and uIP is called
* as appropriate.
*/
void enc_receive_packet(void) {
/* Receive a single packet */
uint8_t header[6];
uint8_t *status = header + 2;
WRITE_REG(ENC_ERDPTL, enc_next_packet & 0xFF);
WRITE_REG(ENC_ERDPTH, (enc_next_packet >> 8) & 0xFF);
enc_rbm(header, 6);
/* Update next packet pointer */
enc_next_packet = header[0] | (header[1] << 8);
uint16_t data_count = status[0] | (status[1] << 8);
if (status[2] & (1 << 7)) {
uip_len = data_count;
enc_rbm(uip_buf, data_count);
if( BUF->type == htons(UIP_ETHTYPE_IP) ) {
uip_arp_ipin();
uip_input();
if( uip_len > 0 ) {
uip_arp_out();
enc_send_packet(uip_buf, uip_len);
uip_len = 0;
}
} else if( BUF->type == htons(UIP_ETHTYPE_ARP) ) {
uip_arp_arpin();
if( uip_len > 0 ) {
//uip_arp_out();
enc_send_packet(uip_buf, uip_len);
uip_len = 0;
}
}
}
uint16_t erxst = READ_REG(ENC_ERXSTL) | (READ_REG(ENC_ERXSTH) << 8);
/* Mark packet as read */
if (enc_next_packet == erxst) {
WRITE_REG(ENC_ERXRDPTL, READ_REG(ENC_ERXNDL));
WRITE_REG(ENC_ERXRDPTH, READ_REG(ENC_ERXNDH));
} else {
WRITE_REG(ENC_ERXRDPTL, (enc_next_packet-1) & 0xFF);
WRITE_REG(ENC_ERXRDPTH, ((enc_next_packet-1) >> 8) & 0xFF);
}
SET_REG_BITS(ENC_ECON2, ENC_ECON2_PKTDEC);
}
/**Callback for every incoming packet.
*
*/
void arp_callback(uint8_t* data, uint16_t len)
{
printf("arp_callback\n");
ethernet_header* eh = (ethernet_header*)data;
if(eh->len_field == ETHERTYPE_ARP)
{
arp_header* ah = (arp_header*)(data+ETH_HLEN);
if(ah->oper == ARP_OPCODE_REPLY)
{
arp_add_to_table(ah);
}
else if(ah->oper == ARP_OPCODE_REQUEST)
{
arp_add_to_table(ah);
//Send arp reply..
eth_addr source_ether = ah->sha;
ip_addr source_ip;
source_ip.data = ah->spa;
ethernet_gen_header(&(source_ether), ETHERTYPE_ARP, eth_data);
arp_header* ah_rep = (arp_header*)(eth_data+ETH_HLEN);
ah_rep->hType = ARP_HTYPE_ETHERNET;
ah_rep->pType = ETHERTYPE_IP;
ah_rep->hlen = 6;
ah_rep->plen = 4;
ah_rep->oper = ARP_OPCODE_REPLY;
SET_MAC((&(ah_rep->sha)));
ah_rep->spa = LOCAL_IP;
ah_rep->tpa = source_ip.data;
ah_rep->tha = source_ether;
enc_prepare_ethernet_packet((ethernet_header*)eth_data);
enc_add_packet_data(eth_data+ETH_HLEN, sizeof(arp_header));
enc_send_packet();
}
}
}
void arp_send_request(ip_addr* ip)
{
eth_addr brdcast;
brdcast.words[0] = HTONS(0xffff);
brdcast.words[1] = HTONS(0xffff);
brdcast.words[2] = HTONS(0xffff);
buffer_t* buf = NULL;
buffer_create(buf, ARP_PLEN);
ethernet_gen_header(&brdcast, ETHERTYPE_ARP, buf->data);
ethernet_header* eh = (ethernet_header*)buf->data;
arp_request(ip, buf->data+sizeof(ethernet_header));
enc_prepare_ethernet_packet(eh);
enc_add_packet_data(buf->data+sizeof(ethernet_header), sizeof(arp_header));
enc_send_packet();
}
void main(void) {
static struct uip_eth_addr eth_addr;
uip_ipaddr_t ipaddr;
cpu_init();
uart_init();
printf("Welcome\n");
spi_init();
enc28j60_comm_init();
printf("Welcome\n");
enc_init(mac_addr);
//
// Configure SysTick for a periodic interrupt.
//
MAP_SysTickPeriodSet(MAP_SysCtlClockGet() / SYSTICKHZ);
MAP_SysTickEnable();
MAP_SysTickIntEnable();
//MAP_IntEnable(INT_GPIOA);
MAP_IntEnable(INT_GPIOE);
MAP_IntMasterEnable();
MAP_SysCtlPeripheralClockGating(false);
printf("int enabled\n");
MAP_GPIOIntTypeSet(GPIO_PORTE_BASE, ENC_INT, GPIO_FALLING_EDGE);
MAP_GPIOPinIntClear(GPIO_PORTE_BASE, ENC_INT);
MAP_GPIOPinIntEnable(GPIO_PORTE_BASE, ENC_INT);
uip_init();
eth_addr.addr[0] = mac_addr[0];
eth_addr.addr[1] = mac_addr[1];
eth_addr.addr[2] = mac_addr[2];
eth_addr.addr[3] = mac_addr[3];
eth_addr.addr[4] = mac_addr[4];
eth_addr.addr[5] = mac_addr[5];
uip_setethaddr(eth_addr);
#define DEFAULT_IPADDR0 10
#define DEFAULT_IPADDR1 0
#define DEFAULT_IPADDR2 0
#define DEFAULT_IPADDR3 201
#define DEFAULT_NETMASK0 255
#define DEFAULT_NETMASK1 255
#define DEFAULT_NETMASK2 255
#define DEFAULT_NETMASK3 0
#undef STATIC_IP
#ifdef STATIC_IP
uip_ipaddr(ipaddr, DEFAULT_IPADDR0, DEFAULT_IPADDR1, DEFAULT_IPADDR2,
DEFAULT_IPADDR3);
uip_sethostaddr(ipaddr);
printf("IP: %d.%d.%d.%d\n", DEFAULT_IPADDR0, DEFAULT_IPADDR1,
DEFAULT_IPADDR2, DEFAULT_IPADDR3);
uip_ipaddr(ipaddr, DEFAULT_NETMASK0, DEFAULT_NETMASK1, DEFAULT_NETMASK2,
DEFAULT_NETMASK3);
uip_setnetmask(ipaddr);
#else
uip_ipaddr(ipaddr, 0, 0, 0, 0);
uip_sethostaddr(ipaddr);
printf("Waiting for IP address...\n");
uip_ipaddr(ipaddr, 0, 0, 0, 0);
uip_setnetmask(ipaddr);
#endif
httpd_init();
#ifndef STATIC_IP
dhcpc_init(mac_addr, 6);
dhcpc_request();
#endif
long lPeriodicTimer, lARPTimer;
lPeriodicTimer = lARPTimer = 0;
int i; // = MAP_GPIOPinRead(GPIO_PORTA_BASE, ENC_INT) & ENC_INT;
while(true) {
//MAP_IntDisable(INT_UART0);
MAP_SysCtlSleep();
//MAP_IntEnable(INT_UART0);
//i = MAP_GPIOPinRead(GPIO_PORTA_BASE, ENC_INT) & ENC_INT;
/*while(i != 0 && g_ulFlags == 0) {
i = MAP_GPIOPinRead(GPIO_PORTA_BASE, ENC_INT) & ENC_INT;
}*/
if( HWREGBITW(&g_ulFlags, FLAG_ENC_INT) == 1 ) {
HWREGBITW(&g_ulFlags, FLAG_ENC_INT) = 0;
enc_action();
}
if(HWREGBITW(&g_ulFlags, FLAG_SYSTICK) == 1) {
HWREGBITW(&g_ulFlags, FLAG_SYSTICK) = 0;
lPeriodicTimer += SYSTICKMS;
lARPTimer += SYSTICKMS;
//printf("%d %d\n", lPeriodicTimer, lARPTimer);
}
if( lPeriodicTimer > UIP_PERIODIC_TIMER_MS ) {
lPeriodicTimer = 0;
int l;
for(l = 0; l < UIP_CONNS; l++) {
uip_periodic(l);
//
// If the above function invocation resulted in data that
// should be sent out on the network, the global variable
// uip_len is set to a value > 0.
//
if(uip_len > 0) {
uip_arp_out();
enc_send_packet(uip_buf, uip_len);
uip_len = 0;
}
}
for(l = 0; l < UIP_UDP_CONNS; l++) {
uip_udp_periodic(l);
if( uip_len > 0) {
uip_arp_out();
enc_send_packet(uip_buf, uip_len);
uip_len = 0;
}
}
}
if( lARPTimer > UIP_ARP_TIMER_MS) {
lARPTimer = 0;
uip_arp_timer();
}
}
}
