Example #1
0
uint8_t receiveSingleFrame() { 
    
    uint8_t ret = LW232_OK;
    uint8_t idx = 0;
    if (CAN_OK == readMsgBufID(&lw232_CanId, &lw232_PacketLen, lw232_Buffer)) {
        if (lw232_CanId > 0x1FFFFFFF) {
            ret = LW232_ERR; // address if totally wrong
        }
        else if (checkPassFilter(lw232_CanId)) {// do we want to skip some addresses?
            if (isExtendedFrame()) {
                printChar(LW232_TR29);
                printFullByte(HIGH_BYTE(HIGH_WORD(lw232_CanId)));
                printFullByte(LOW_BYTE(HIGH_WORD(lw232_CanId)));
                printFullByte(HIGH_BYTE(LOW_WORD(lw232_CanId)));
                printFullByte(LOW_BYTE(LOW_WORD(lw232_CanId)));
            }
            else {
                printChar(LW232_TR11);
                printNibble(HIGH_BYTE(LOW_WORD(lw232_CanId)));
                printFullByte(LOW_BYTE(LOW_WORD(lw232_CanId)));
            }
            //write data len
            printNibble(lw232_PacketLen);
            //write data
            for (idx = 0; idx < lw232_PacketLen; idx++) {
                printFullByte(lw232_Buffer[idx]);
            }
            //write timestamp if needed
            if (lw232_TimeStamp != LW232_TIMESTAMP_OFF) {
                uint32_t time = 0; //millis();
                if (lw232_TimeStamp == LW232_TIMESTAMP_ON_NORMAL) { 
                    // standard LAWICEL protocol. two bytes.
                    time %= 60000;  
                } else {
                    // non standard protocol - 4 bytes timestamp
                    printFullByte(HIGH_BYTE(HIGH_WORD(time)));
                    printFullByte(LOW_BYTE(HIGH_WORD(time)));
                }
                printFullByte(HIGH_BYTE(LOW_WORD(time)));
                printFullByte(LOW_BYTE(LOW_WORD(time)));
            }
        }
    }
    else {
        ret = LW232_ERR;
    }
    return ret;
}
Example #2
0
INT8U Can232::receiveSingleFrame() {
    INT8U ret = LW232_OK;
    INT8U idx = 0;
    if (CAN_OK == readMsgBufID(&lw232CanId, &lw232PacketLen, lw232Buffer)) {
        if (lw232CanId > 0x1FFFFFFF) {
            ret = LW232_ERR; // address if totally wrong
        }
        else if (checkPassFilter(lw232CanId)) {// do we want to skip some addresses?
            if (isExtendedFrame()) {
                Serial.print(LW232_TR29);
                HexHelper::printFullByte(HIGH_BYTE(HIGH_WORD(lw232CanId)));
                HexHelper::printFullByte(LOW_BYTE(HIGH_WORD(lw232CanId)));
                HexHelper::printFullByte(HIGH_BYTE(LOW_WORD(lw232CanId)));
                HexHelper::printFullByte(LOW_BYTE(LOW_WORD(lw232CanId)));
            }
            else {
                Serial.print(LW232_TR11);
                HexHelper::printNibble(HIGH_BYTE(LOW_WORD(lw232CanId)));
                HexHelper::printFullByte(LOW_BYTE(LOW_WORD(lw232CanId)));
            }
            //write data len
            HexHelper::printNibble(lw232PacketLen);
            //write data
            for (idx = 0; idx < lw232PacketLen; idx++) {
                HexHelper::printFullByte(lw232Buffer[idx]);
            }
            //write timestamp if needed
            if (lw232TimeStamp != LW232_TIMESTAMP_OFF) {
                INT32U time = millis();
                if (lw232TimeStamp == LW232_TIMESTAMP_ON_NORMAL) { 
                    // standard LAWICEL protocol. two bytes.
                    time %= 60000;  
                } else {
                    // non standard protocol - 4 bytes timestamp
                    HexHelper::printFullByte(HIGH_BYTE(HIGH_WORD(time)));
                    HexHelper::printFullByte(LOW_BYTE(HIGH_WORD(time)));
                }
                HexHelper::printFullByte(HIGH_BYTE(LOW_WORD(time)));
                HexHelper::printFullByte(LOW_BYTE(LOW_WORD(time)));
            }
        }
    }
    else {
        ret = LW232_ERR;
    }
    return ret;
}