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/**

 * CAN Relay.

 *

 *

 * @date    2006-12-17

 * @author  Erik Larsson

 *

 *   ADC=Vin*1024/Vref

 *   Vout=( 10 mV/C )( Temperature C ) + 500 mV

 *

 *  Transmitts: DATA: <temperature low byte> <temperature high byte> <relay status> <failsafe mode>

 *

 *

 */

/*-----------------------------------------------------------------------------

 * Includes

 *---------------------------------------------------------------------------*/

/* system files */

#include <avr/io.h>

#include <avr/interrupt.h>

#include <stdio.h>

#include <string.h>

/* lib files */

#include "../config.inc" 

#include <config.h>

#include <bios.h>

#include <drivers/timer/timebase.h>

#include <drivers/sensor/tc1047/tc1047.h>

/* defines */

#define RELAY_OFF           0x01

#define RELAY_ON            0x02

#define FAILSAFE_MODE       0x0F

#define FAILSAFE_TRESHOLD   0xFF  /* Degrees when nodeRelay goes into failsafe mode */

#define RELAY_CMD_ON        0x01

#define RELAY_CMD_OFF       0x02

#define RELAY_CMD_TOGGLE    0x03

#define RELAY_CMD_STATUS    0x04

#define RELAY_CMD_RESET     0x05

#define STATUS_SEND_PERIOD  10000UL /* milliseconds */

#define FAILSAFE_SEND_PERIOD    10000UL /* milliseconds */

#define BOUNCE_TIME         10 /* milliseconds */

#define BUTTON1             1

#define BUTTON2             2

#define APP_TYPE    CAN_APPTYPES_RELAY

#define APP_VERSION 0x0001

/*-------------------------------------------------------------------------

 * Global variables

 * -----------------------------------------------------------------------*/

uint8_t relayStatus, failsafe_flag = 0;

uint32_t boardTemperature = 0;

volatile Can_Message_t rxMsg; // Message storage

volatile uint8_t rxMsgFull;   // Synchronization flag

/*----------------------------------------------------------------------------

 * Functions

 * -------------------------------------------------------------------------*/

uint8_t relayOff(void);

uint8_t relayOn(void);

void relayFailsafe(void);

void sendStatus(void);

void can_receive(Can_Message_t *msg)

{ // CAN callback function

    if (!rxMsgFull) {

        memcpy((void*)&rxMsg, msg, sizeof(rxMsg));

        rxMsgFull = 1;

    }

}

/*----------------------------------------------------------------------------

 * Interrupt routines // FIXME ordna och testa tryckknappar/rotary encoder

 * -------------------------------------------------------------------------*/

#if TWO_BUTTON_MODE

ISR( PCINT2_vect )

{

}

#endif

/*-----------------------------------------------------------------------------

 * Main Program

 *---------------------------------------------------------------------------*/

int main(void) {

    uint32_t timeStamp = Timebase_CurrentTime(), temp = timeStamp;

    adcTemperatureInit();

    // Set up callback for CAN messages

    BIOS_CanCallback = &can_receive;

    sei();

    Timebase_Init();

    Can_Message_t txMsg;

    txMsg.Id = (CAN_NMT_APP_START << CAN_SHIFT_NMT_TYPE) | (NODE_ID << CAN_SHIFT_NMT_SID);

    txMsg.DataLength = 4;

    txMsg.RemoteFlag = 0;

    txMsg.ExtendedFlag = 1;

    txMsg.Data.words[0] = APP_TYPE;

    txMsg.Data.words[1] = APP_VERSION;

    BIOS_CanSend(&txMsg);

    // Turn relay off

    relayStatus = relayOff();

    // Main loop

    while (1) {

        temp = Timebase_CurrentTime();

        if( temp - timeStamp >= STATUS_SEND_PERIOD ){

            timeStamp = temp;

            // Send relay status to CAN

            sendStatus();

        }

        if (rxMsgFull) {

            uint16_t acttype;

            uint8_t relayid;

            if ( ((rxMsg.Id & CAN_MASK_CLASS)>>CAN_SHIFT_CLASS) == CAN_ACT){

                // Actuator package

                acttype =(uint16_t)((rxMsg.Id & CAN_MASK_ACT_TYPE) >> CAN_SHIFT_ACT_TYPE);

                relayid = (uint8_t)((rxMsg.Id & CAN_MASK_ACT_ID) >> CAN_SHIFT_ACT_ID);

                if ((acttype == ACT_TYPE_RELAY) && (relayid == THISRELAYID)) {

                    // This is a message for this relay

                    if (rxMsg.Data.bytes[0] == RELAY_CMD_RESET) {

                        // Return to normal operation

                        failsafe_flag = 0;

                    }

                    if (!failsafe_flag) {

                        if (rxMsg.Data.bytes[0] == RELAY_CMD_ON ){

                            // Turn relay on

                            relayStatus = relayOn();

                        } else if (rxMsg.Data.bytes[0] == RELAY_CMD_OFF ){

                            // Turn relay off

                            relayStatus = relayOff();

                        } else if (rxMsg.Data.bytes[0] == RELAY_CMD_TOGGLE ){

                                // Toggle relay

                                if(relayStatus == RELAY_OFF){

                                    relayStatus = relayOn();

                                }else{

                                    relayStatus = relayOff();

                                }

                        }else if(rxMsg.Data.bytes[0] == RELAY_CMD_STATUS ){

                            // Send relay status to CAN

                            sendStatus();

                        }

                    }

                }

            }

            rxMsgFull = 0; //  

        }

    }

    return 0;

}

uint8_t relayOff()

{

    // Turn off relay

    PORTC &= ~(1<<PC1);

    DDRC |= (1<<DDC1);

    return RELAY_OFF;

}

uint8_t relayOn()

{

    // Turn on relay

    DDRC &= ~(1<<DDC1);

    PORTC |= (1<<PC1);

    return RELAY_ON;

}

void relayFailsafe()

{

    uint32_t failsafe_timeStamp, temp;

    relayStatus = relayOff();

    failsafe_flag = 1;

    while(1){

        if( !failsafe_flag ){

            // Return from failsafe mode

            return;

        }

// TODO skicka med period

        sendStatus( );

    }

}

void sendStatus()

{

    uint32_t temperature;

    Can_Message_t statusMsg;

    statusMsg.RemoteFlag = 0;

    statusMsg.ExtendedFlag = 1;

    statusMsg.DataLength = 4;

    statusMsg.Id = ((CAN_SNS << CAN_SHIFT_CLASS) | (SNS_TYPE_STATUS << CAN_SHIFT_SNS_TYPE) | (SNS_ID_RELAY_STATUS << CAN_SHIFT_SNS_ID) | (NODE_ID << CAN_SHIFT_SNS_SID));

    temperature = getTC1047temperature();

    if( (int32_t)temperature >= FAILSAFE_TRESHOLD && !failsafe_flag ){

        // Goto failsafe mode

        relayFailsafe();

    }else{

        // Transmitt node status

        statusMsg.Data.bytes[0] = temperature & 0x00FF;

        statusMsg.Data.bytes[1] = (temperature & 0xFF00)>>8;

        statusMsg.Data.bytes[2] = relayStatus;

        statusMsg.Data.bytes[3] = failsafe_flag;

        BIOS_CanSend( &statusMsg );

    }

}