This function writes a buffer byte stream to the given object dictionary.


The object entry is addressed with the given key and the bytes will be read from to the given source buffer of the given length.


int16_t CODictWrBuffer(CO_DICT   *cod,
                       uint32_t  key,
                       uint8_t  *buffer,
                       uint32_t  len);


Parameter Description
cod pointer to the object dictionary
key object entry key; should be generated with CO_DEV
buffer pointer to the source bytes
len length of source buffer

Returned Value

  • == CO_ERR_NONE : successful operation
  • != CO_ERR_NONE : an error is detected


The following example writes the value to the hypothetical application specific object entry “[1234:56]” within the object dictionary of the CANopen node AppNode.

    int16_t  err;
    uint8_t  buffer[10] = { 'a','b','c','d','e','f','g','h','i', 0 };
    err = CODictWrBuffer (&(Appnode.Dict), CO_DEV(0x1234, 0x56), buffer, 10);
    if (err != CO_ERR_NONE) {
        /* object [1234:56] is missing or error during writing */