Warum optimiert ISE 10.1SP3 diese signale weg

[Auf dem Schlauch (Gast)]

Hi,
ich wollte die RS232 Schnittstelle von Lothar Millers HP in Betrieb 
nehmen. Jedoch synthetisiert er mir ein Haufen Signale weg und ich 
verstehe nicht warum:

WARNING:Xst:1426 - The value init of the FF/Latch txbitcnt_1 hinder the 
constant cleaning in the block RS232.
   You should achieve better results by setting this init to 0.
WARNING:Xst:1426 - The value init of the FF/Latch txsr_0 hinder the 
constant cleaning in the block RS232.
   You should achieve better results by setting this init to 0.
WARNING:Xst:2677 - Node <txbitcnt_0> of sequential type is unconnected 
in block <RS232>.
WARNING:Xst:2677 - Node <txsr_1> of sequential type is unconnected in 
block <RS232>.
WARNING:Xst:2677 - Node <txsr_2> of sequential type is unconnected in 
block <RS232>.
WARNING:Xst:2677 - Node <txsr_3> of sequential type is unconnected in 
block <RS232>.
WARNING:Xst:2677 - Node <txsr_4> of sequential type is unconnected in 
block <RS232>.
WARNING:Xst:2677 - Node <txsr_5> of sequential type is unconnected in 
block <RS232>.
WARNING:Xst:2677 - Node <txsr_6> of sequential type is unconnected in 
block <RS232>.
WARNING:Xst:2677 - Node <txsr_7> of sequential type is unconnected in 
block <RS232>.
WARNING:Xst:2677 - Node <txsr_8> of sequential type is unconnected in 
block <RS232>.
WARNING:Xst:2677 - Node <txsr_9> of sequential type is unconnected in 
block <RS232>.
INFO:Xst:2261 - The FF/Latch <txbitcnt_1> in Unit <RS232> is equivalent 
to the following FF/Latch, which will be removed : <txsr_0>
WARNING:Xst:2677 - Node <tx_data_reg_0> of sequential type is 
unconnected in block <top>.
WARNING:Xst:2677 - Node <tx_data_reg_1> of sequential type is 
unconnected in block <top>.
WARNING:Xst:2677 - Node <tx_data_reg_2> of sequential type is 
unconnected in block <top>.
WARNING:Xst:2677 - Node <tx_data_reg_3> of sequential type is 
unconnected in block <top>.
WARNING:Xst:2677 - Node <tx_data_reg_4> of sequential type is 
unconnected in block <top>.
WARNING:Xst:2677 - Node <tx_data_reg_5> of sequential type is 
unconnected in block <top>.
WARNING:Xst:2677 - Node <tx_data_reg_6> of sequential type is 
unconnected in block <top>.
WARNING:Xst:2677 - Node <tx_data_reg_7> of sequential type is 
unconnected in block <top>.
WARNING:Xst:2677 - Node <rxsr_0> of sequential type is unconnected in 
block <RS232_instance>.
WARNING:Xst:2677 - Node <rxsr_1> of sequential type is unconnected in 
block <RS232_instance>.
WARNING:Xst:2677 - Node <rxsr_2> of sequential type is unconnected in 
block <RS232_instance>.
WARNING:Xst:2677 - Node <rxsr_3> of sequential type is unconnected in 
block <RS232_instance>.
WARNING:Xst:2677 - Node <rxsr_4> of sequential type is unconnected in 
block <RS232_instance>.
WARNING:Xst:2677 - Node <rxsr_5> of sequential type is unconnected in 
block <RS232_instance>.
WARNING:Xst:2677 - Node <rxsr_6> of sequential type is unconnected in 
block <RS232_instance>.
WARNING:Xst:2677 - Node <rxsr_7> of sequential type is unconnected in 
block <RS232_instance>.

Optimizing unit <RS232> ...
WARNING:Xst:2677 - Node <tx_data_reg_0> of sequential type is 
unconnected in block <top>.
WARNING:Xst:2677 - Node <tx_data_reg_1> of sequential type is 
unconnected in block <top>.
WARNING:Xst:2677 - Node <tx_data_reg_2> of sequential type is 
unconnected in block <top>.
WARNING:Xst:2677 - Node <tx_data_reg_3> of sequential type is 
unconnected in block <top>.
WARNING:Xst:2677 - Node <tx_data_reg_4> of sequential type is 
unconnected in block <top>.
WARNING:Xst:2677 - Node <tx_data_reg_5> of sequential type is 
unconnected in block <top>.
WARNING:Xst:2677 - Node <tx_data_reg_6> of sequential type is 
unconnected in block <top>.
WARNING:Xst:2677 - Node <tx_data_reg_7> of sequential type is 
unconnected in block <top>.
WARNING:Xst:2677 - Node <rxsr_0> of sequential type is unconnected in 
block <RS232_instance>.
WARNING:Xst:2677 - Node <rxsr_1> of sequential type is unconnected in 
block <RS232_instance>.
WARNING:Xst:2677 - Node <rxsr_2> of sequential type is unconnected in 
block <RS232_instance>.
WARNING:Xst:2677 - Node <rxsr_3> of sequential type is unconnected in 
block <RS232_instance>.
WARNING:Xst:2677 - Node <rxsr_4> of sequential type is unconnected in 
block <RS232_instance>.
WARNING:Xst:2677 - Node <rxsr_5> of sequential type is unconnected in 
block <RS232_instance>.
WARNING:Xst:2677 - Node <rxsr_6> of sequential type is unconnected in 
block <RS232_instance>.
WARNING:Xst:2677 - Node <rxsr_7> of sequential type is unconnected in 
block <RS232_instance>.

[Lothar M. (Firma: Titel) (lkmiller) (Moderator)]

Was sagt die Simulation?
Welche Zielplattform hast du?
Lass mal den BUFG raus. Den macht die Toolchain schon selber rein...

[Auf dem Schlauch (Gast)]

Die Simulation sagt es ist alles in Ordnung.

Den BUFG habe ich rein gemacht weil ich sicher gehen muss, dass immer 
derselbe verwendet wird

[Auf dem Schlauch (Gast)]

Jedenfalls so oder so optimiert mir die Synthese die Signale weg

[Auf dem Schlauch (Gast)]

Oh mannsen ich hab den Fehler entdeckt gerade nochmal in der Sim:

Beim Copypasten die Zeile

txcnt <= txcnt+1;

verhunzt. Es ist einfach zu warm heut zum arbeiten

[Lothar M. (Firma: Titel) (lkmiller) (Moderator)]

Auf dem Schlauch schrieb:
> Oh mannsen ich hab den Fehler entdeckt gerade nochmal in der Sim:
Doch gut, so eine Simulation... ;-)

Auf dem Schlauch schrieb:
> Beim Copypasten die Zeile
>   txcnt <= txcnt+1;
> verhunzt.
"Verhunzt" ist gut...
Die fehlt komplett:

      if(txcnt<(Quarz_Taktfrequenz/Baudrate)-1) then
          -- hier fehlt was  :-o
      else  -- nächstes Bit ausgeben