static PyObject *
Reader_write(Reader *self, PyObject *args, PyObject *kwds)
{
char* epc_data;
char* epc_target;
TMR_Status ret;
TMR_TagData data;
TMR_TagData target;
TMR_TagFilter filter;
// Read call arguments.
static char *kwlist[] = {"epc_target", "epc_code", NULL};
if (!PyArg_ParseTupleAndKeywords(args, kwds, "ss", kwlist, &epc_target, &epc_data))
return NULL;
/* build target tag to search */
target.epcByteCount = strlen(epc_target) * sizeof(char) / 2;
TMR_hexToBytes(epc_target, target.epc, target.epcByteCount, NULL);
/* build data tag to be writen */
data.epcByteCount = strlen(epc_data) * sizeof(char) / 2;
TMR_hexToBytes(epc_data, data.epc, data.epcByteCount, NULL);
// Build filter target tag to be replaced.
TMR_TF_init_tag(&filter, &target);
// Write data tag on target tag.
ret = TMR_writeTag(&self->reader, &filter, &data);
// In case of not target tag found.
if (ret == TMR_ERROR_NO_TAGS_FOUND)
Py_RETURN_FALSE;
Py_RETURN_TRUE;
}
/*
* First version, based on api samples. Safer one
*
*
**/
int writeTagOLD(int readerId, uint8_t newEpcData[], uint8_t epcBytes)
{
int error;
uint8_t epcData[] = {
0x01, 0x23, 0x45, 0x67, 0x89, 0xAB,
0xCD, 0xEF, 0x01, 0x23, 0x45, 0x67,
};
TMR_TagData epc;
TMR_TagOp tagop;
error=checkError(TMR_stopReading(readers[readerId]), "Stopping reader before tag writting");
/* Set the tag EPC to a known value*/
epc.epcByteCount = sizeof(epcData) / sizeof(epcData[0]);
memcpy(epc.epc, epcData, epc.epcByteCount * sizeof(uint8_t));
error=checkError(TMR_TagOp_init_GEN2_WriteTag(&tagop, &epc), "initializing GEN2_WriteTag");
error=checkError(TMR_executeTagOp(readers[readerId], &tagop, NULL, NULL), "executing GEN2_WriteTag");
if (!error)
{
printf("Tag has now a known value................................................................\n");
} else
{
printf("CANNOT set tag to known value\n");
return error;
}
int i;
printf("New tag id to write is: [");
for (i=0;i<12;i++)
{
printf("0x%02X",newEpcData[i]);
if (i<11) printf(", ");
}
printf("]\n");
if (!error)
{ /* Write Tag EPC with a select filter*/
TMR_TagFilter filter;
TMR_TagData newEpc;
TMR_TagOp newtagop;
// This should work... but it does not
//newEpc.epcByteCount = sizeof(newEpcData) / sizeof(newEpcData[0]);
newEpc.epcByteCount = epcBytes;
memcpy(newEpc.epc, newEpcData, newEpc.epcByteCount * sizeof(uint8_t));
printf("We are about to write %d bytes \n",newEpc.epcByteCount);
printf("Size of newEpcData %lu\n",sizeof(newEpcData) );
printf("Size of newEpcData[0] %lu\n", sizeof(newEpcData[0]));
/* Initialize the new tagop to write the new epc*/
error=checkError(TMR_TagOp_init_GEN2_WriteTag(&newtagop, &newEpc), "initializing GEN2_WriteTag");
/* Initialize the filter with the original epc of the tag which is set earlier*/
error=checkError(TMR_TF_init_tag(&filter, &epc), "initializing TMR_TagFilter");
/* Execute the tag operation Gen2 writeTag with select filter applied*/
error=checkError(TMR_executeTagOp(readers[readerId], &newtagop, &filter, NULL), "executing GEN2_WriteTag");
error=checkError(TMR_startReading(readers[readerId]), "Starting reader");
}
return error;
}
