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/**
 * 
 * 
 * 
 * @date    2006-11-21
 * @author  Jimmy Myhrman, Anders Runeson
 *   
 */

/*-----------------------------------------------------------------------------
 * Includes
 *---------------------------------------------------------------------------*/
/* system files */
#include <avr/io.h>
#include <avr/interrupt.h>
#include <avr/wdt.h>
#include <stdio.h>
/* lib files */
#include <can.h>
//#include <serial.h>
#include <timebase.h>
#include <ip_arp_udp_tcp.h>
#include <enc28j60.h>
#include <timeout.h>
#include <avr_compat.h>
#include <net.h>

// please modify the following two lines. mac and ip have to be unique
// in your local area network. You can not have the same numbers in
// two devices:
static uint8_t mymac[6] = {0x54,0x55,0x58,0x10,0x00,0x24};
//static uint8_t myip[4] = {192,168,0,50};
static uint8_t myip[4] = {193,11,254,22};
static uint16_t rmDumperPrt =1200; // remote port for dumping data
static uint16_t rmCan2SerPrt =1100; // remote port for Can2Serial-data
//static uint16_t locDumperPrt =1200; // listen port 
static uint16_t locCan2SerPrt =1100; // listen port for Can2Serial-data
static uint8_t gotdumpserver = 0;
static uint8_t gotcan2serserver = 0;

// how did I get the mac addr? Translate the first 3 numbers into ascii is: TUX

static uint8_t remotemac[6];
static uint8_t remoteip[4];

static uint8_t prgremotemac[6];
static uint8_t prgremoteip[4];

#define BUFFER_SIZE 250
static uint8_t buf[BUFFER_SIZE+1];

#define SEND_BUFFER_SIZE 20
static char sendbuf[SEND_BUFFER_SIZE+1];
static uint8_t buffpoint;
 
#define C2S_START_BYTE 253
#define C2S_END_BYTE 250

/* set to 0 for not sending timestamps on bus */
#define SENDTIMESTAMP   1

/*----------------------------------------------------------------------------
 * Putchar for udp
 * Implements a small buffer, sends packet over udp if buffer is full or 
 * \n-char is sent.
 * Needs a timeout to force send. 
 *--------------------------------------------------------------------------*/
int udp_putchar(char c, FILE* stream) {
    if (gotdumpserver != 0) {
        sendbuf[buffpoint] = c;
        buffpoint++;
        
        if (c == '\n' || buffpoint > SEND_BUFFER_SIZE) {
            send_udp(buf, sendbuf, buffpoint, rmDumperPrt, remotemac, remoteip);
            buffpoint = 0;
        }
    }
    return 0;
}

static FILE mystdout = FDEV_SETUP_STREAM(udp_putchar, NULL, _FDEV_SETUP_WRITE); 

/*-----------------------------------------------------------------------------
 * Main Program
 *---------------------------------------------------------------------------*/
int main(void) {

    //ethernet vars
    uint16_t plen = 0;
    uint8_t payloadlen=0;
    buffpoint = 0;
    
    //can vars
    Can_Message_t txMsg;
    Can_Message_t rxMsg;
    txMsg.Id = 3;
    txMsg.DataLength = 0;
    txMsg.RemoteFlag = 0;
    txMsg.ExtendedFlag = 1;

    uint32_t timeStamp = 0;
    
    Mcu_Init();
    Timebase_Init();

    //alla printf ska skriva till udp
    stdout = &mystdout;    //set the output stream 
    
    sei();

    if (Can_Init() != CAN_OK) {
    }

    /* set output to gnd, reset the ethernet chip */
    PORTC &= ~(1<<PC1);
    /* set PC1 as output */
    DDRC |= (1<<DDC1);

    delay_ms(20);
    /* set PC1 as input, resetpin pulled high */
    DDRC &= ~(1<<DDC1);
    
    delay_ms(100);
    
    /*initialize enc28j60*/
    enc28j60Init(mymac);
    delay_ms(20);
    
    /* Magjack leds configuration, see enc28j60 datasheet, page 11 */
    // LEDB=yellow LEDA=green
    //
    // 0x476 is PHLCON LEDA=links status, LEDB=receive/transmit
    enc28j60PhyWrite(PHLCON,0x476);
    delay_ms(20);
    
    //init the ethernet/ip layer:
    init_ip_arp_udp_tcp(mymac,myip,80);

    /* main loop */
    while (1) {
        /* service the CAN routines */
        Can_Service();
        
#if SENDTIMESTAMP == 1
        /* send CAN message and check for CAN errors once every second */
        if (Timebase_PassedTimeMillis(timeStamp) >= 1000) {
            timeStamp = Timebase_CurrentTime();
            /* send timestamp, to keep network alive */
            txMsg.Id = 0;
            txMsg.DataLength = 0;
            Can_Send(&txMsg);
            
        }
#endif
        
        /* check if any messages have been received */
        while (Can_Receive(&rxMsg) == CAN_OK) {
            uint8_t i;

            /*if (gotdumpserver != 0) {
                printf("MSG Received: ID=%lx, DLC=%u, EXT=%u, RTR=%u, ", rxMsg.Id, (uint16_t)(rxMsg.DataLength), (uint16_t)(rxMsg.ExtendedFlag), (uint16_t)(rxMsg.RemoteFlag));
                printf("data={ ");
                for (i=0; i<rxMsg.DataLength; i++) {
                    printf("%x ", rxMsg.Data.bytes[i]);
                }
                printf("}\n");
            }*/
            
            if (gotcan2serserver != 0) {
                //skicka ocks� som udppaket till rmCan2SerPrt
                char sendbuf2[17];
                
                sendbuf2[0] = C2S_START_BYTE;
                sendbuf2[1] = (uint8_t)rxMsg.Id;
                sendbuf2[2] = (uint8_t)(rxMsg.Id>>8);
                sendbuf2[3] = (uint8_t)(rxMsg.Id>>16);
                sendbuf2[4] = (uint8_t)(rxMsg.Id>>24);
                sendbuf2[5] = rxMsg.ExtendedFlag;
                sendbuf2[6] = rxMsg.RemoteFlag;
                sendbuf2[7] = rxMsg.DataLength;
                for (i=0; i<8; i++) {
                    sendbuf2[8+i] = rxMsg.Data.bytes[i];
                }
                sendbuf2[16] = C2S_END_BYTE;
                
                send_udp(buf, sendbuf2, 18, rmCan2SerPrt, prgremotemac, prgremoteip);
            }
        }
        
        //test-debug-kod
        if ((enc28j60Read(EIR) & EIR_TXERIF)) {
            //printf("EIR_TXERIF set!\n");
            if ((enc28j60Read(ECON1) & ECON1_TXRTS)) {
                //printf("ECON1_TXRTS set!\n");
            }
        }
        if ((enc28j60Read(EIR) & EIR_TXIF)) {
            //printf("EIR_TXIF set! ");
        }
        if ((enc28j60Read(ESTAT) & ESTAT_TXABRT)) {
            //printf("ESTAT_TXABRT set!\n");
            //printf("MACLCON1: %i\n", enc28j60Read(MACLCON1));
            enc28j60WriteOp(ENC28J60_BIT_FIELD_CLR, ESTAT, ESTAT_TXABRT);
        }
        
        // get the next new packet:
        plen = enc28j60PacketReceive(BUFFER_SIZE, buf);

        /*plen will ne unequal to zero if there is a valid 
         * packet (without crc error) */
        if(plen!=0){
            // arp is broadcast if unknown but a host may also
            // verify the mac address by sending it to 
            // a unicast address.
            if(eth_type_is_arp_and_my_ip(buf,plen)){
                    make_arp_answer_from_request(buf);
            } else {
                // check if ip packets (icmp or udp) are for us:
                if(eth_type_is_ip_and_my_ip(buf,plen)!=0){
                    
                    if(buf[IP_PROTO_P]==IP_PROTO_ICMP_V && buf[ICMP_TYPE_P]==ICMP_TYPE_ECHOREQUEST_V){
                            // a ping packet, let's send pong
                            make_echo_reply_from_request(buf,plen);
                            //txMsg.Id = 6;
                            //Can_Send(&txMsg);
                            
                    }
                    if (buf[IP_PROTO_P]==IP_PROTO_UDP_V){
                        payloadlen=buf[UDP_LEN_L_P]-UDP_HEADER_LEN;
                        uint8_t i = 0;
                        
                        //om port 1100 (programmeringsporten)
                        if ((buf[UDP_DST_PORT_H_P]==((locCan2SerPrt>>8) & 0xff)) && (buf[UDP_DST_PORT_L_P] == (locCan2SerPrt & 0xff))) {
                            while(i<6){
                                prgremotemac[i]=buf[ETH_SRC_MAC +i];
                                i++;
                            }
                            i=0;
                            while(i<4){
                                prgremoteip[i]=buf[IP_SRC_P +i];
                                i++;
                            }
                            gotcan2serserver = 1;

                            if ((buf[UDP_DATA_P]==C2S_START_BYTE) && (buf[UDP_DATA_P+16]==C2S_END_BYTE) && (payloadlen==17)) {
                                Can_Message_t cm;
                                //cm.Id = 0;
                                cm.DataLength = buf[UDP_DATA_P+7];
                                cm.RemoteFlag = buf[UDP_DATA_P+6];
                                cm.ExtendedFlag = buf[UDP_DATA_P+5];
                                cm.Id = (uint32_t)buf[UDP_DATA_P+1] + ((uint32_t)buf[UDP_DATA_P+2] << 8) + ((uint32_t)buf[UDP_DATA_P+3] << 16) + ((uint32_t)buf[UDP_DATA_P+4] << 24);
                                uint8_t i;
                                for (i = 0; i < cm.DataLength; i++) {
                                    cm.Data.bytes[i] = buf[UDP_DATA_P+8+i];
                                }
                                Can_Send(&cm);
                                
                                /*if (gotdumpserver != 0) {
                                    printf("MSG Received: ID=%lx, DLC=%u, EXT=%u, RTR=%u, ", cm.Id, (uint16_t)(cm.DataLength), (uint16_t)(cm.ExtendedFlag), (uint16_t)(cm.RemoteFlag));
                                    printf("data={ ");
                                    for (i=0; i<cm.DataLength; i++) {
                                        printf("%x ", cm.Data.bytes[i]);
                                    }
                                    printf("}\n");
                                }*/
                            }
                        //om port 1200 (dumparporten) 
                        } /*else if ((buf[UDP_DST_PORT_H_P]==((locDumperPrt>>8) & 0xff)) && (buf[UDP_DST_PORT_L_P] == (locDumperPrt & 0xff))) {
                            if (gotdumpserver == 0) {
                                while(i<6){
                                    remotemac[i]=buf[ETH_SRC_MAC +i];
                                    i++;
                                }
                                i=0;
                                while(i<4){
                                    remoteip[i]=buf[IP_SRC_P +i];
                                    i++;
                                }
                                i=0;
                                
                                gotdumpserver = 1;
                                make_udp_reply_from_request(buf,"Got server",10,rmDumperPrt);
                            } else {
                                make_udp_reply_from_request(buf,"Already got server",18,rmDumperPrt);
                            }
                        }*/
                    }                       
                }
            }
        }
        

                
        
    }
    
    return 0;
}