/**
 * CANopen Global fail-safe command protocol.
 *
 * @file        CO_GFC.c
 * @ingroup     CO_GFC
 * @author      Robert Grüning
 * @copyright   2020 - 2020 Robert Grüning
 *
 * This file is part of CANopenNode, an opensource CANopen Stack.
 * Project home page is <https://github.com/CANopenNode/CANopenNode>.
 * For more information on CANopen see <http://www.can-cia.org/>.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#include "304/CO_GFC.h"

#if (CO_CONFIG_GFC) & CO_CONFIG_GFC_ENABLE

#if (CO_CONFIG_GFC) & CO_CONFIG_GFC_CONSUMER

static void CO_GFC_receive(void *object, void *msg)
{
    CO_GFC_t *GFC;
    uint8_t DLC = CO_CANrxMsg_readDLC(msg);

    GFC = (CO_GFC_t *)
        object; /* this is the correct pointer type of the first argument */

    if ((*GFC->valid == 0x01) && (DLC == 0)) {

#if (CO_CONFIG_GFC) & CO_CONFIG_GFC_CONSUMER
        /* Optional signal to RTOS, which can resume task, which handles SRDO.
         */
        if (GFC->pFunctSignalSafe != NULL) {
            GFC->pFunctSignalSafe(GFC->functSignalObjectSafe);
        }
#endif
    }
}

void CO_GFC_initCallbackEnterSafeState(CO_GFC_t *GFC,
                                       void *object,
                                       void (*pFunctSignalSafe)(void *object))
{
    if (GFC != NULL) {
        GFC->functSignalObjectSafe = object;
        GFC->pFunctSignalSafe = pFunctSignalSafe;
    }
}
#endif

CO_ReturnError_t CO_GFC_init(CO_GFC_t *GFC,
                             uint8_t *valid,
                             CO_CANmodule_t *GFC_CANdevRx,
                             uint16_t GFC_rxIdx,
                             uint16_t CANidRxGFC,
                             CO_CANmodule_t *GFC_CANdevTx,
                             uint16_t GFC_txIdx,
                             uint16_t CANidTxGFC)
{
    if (GFC == NULL || valid == NULL || GFC_CANdevRx == NULL ||
        GFC_CANdevTx == NULL) {
        return CO_ERROR_ILLEGAL_ARGUMENT;
    }
    GFC->valid = valid;
#if (CO_CONFIG_GFC) & CO_CONFIG_GFC_PRODUCER
    GFC->CANdevTx = GFC_CANdevTx;
#endif
#if (CO_CONFIG_GFC) & CO_CONFIG_GFC_CONSUMER
    GFC->functSignalObjectSafe = NULL;
    GFC->pFunctSignalSafe = NULL;
#endif

#if (CO_CONFIG_GFC) & CO_CONFIG_GFC_PRODUCER
    GFC->CANtxBuff = CO_CANtxBufferInit(
        GFC->CANdevTx, /* CAN device */
        GFC_txIdx,     /* index of specific buffer inside CAN module */
        CANidTxGFC,    /* CAN identifier */
        0,             /* rtr */
        0,             /* number of data bytes */
        0);            /* synchronous message flag bit */

    if (GFC->CANtxBuff == NULL) {
        return CO_ERROR_TX_UNCONFIGURED;
    }
#else
    (void)GFC_txIdx;    /* unused */
    (void)CANidTxGFC;   /* unused */
#endif
#if (CO_CONFIG_GFC) & CO_CONFIG_GFC_CONSUMER
    const CO_ReturnError_t r = CO_CANrxBufferInit(
        GFC_CANdevRx,    /* CAN device */
        GFC_rxIdx,       /* rx buffer index */
        CANidRxGFC,      /* CAN identifier */
        0x7FF,           /* mask */
        0,               /* rtr */
        (void *)GFC,     /* object passed to receive function */
        CO_GFC_receive); /* this function will process received message */
    if (r != CO_ERROR_NO) {
        return r;
    }
#else
    (void)GFC_rxIdx;    /* unused */
    (void)CANidRxGFC;   /* unused */
#endif

    return CO_ERROR_NO;
}

#if (CO_CONFIG_GFC) & CO_CONFIG_GFC_PRODUCER

CO_ReturnError_t CO_GFCsend(CO_GFC_t *GFC)
{
    if (*GFC->valid == 0x01)
        return CO_CANsend(GFC->CANdevTx, GFC->CANtxBuff);
    return CO_ERROR_NO;
}
#endif

#endif /* (CO_CONFIG_GFC) & CO_CONFIG_GFC_ENABLE */