| ??? 01/22/08 12:58 Read: times |
#149827 - external device I/O access problem |
Dear All,
I am using Keil uVision IDE. In debugging mode, when I step into the line which writes a byte to an DAC I have to write at least 3 times. Everytime I can see the WR and CS signals are changing but nothing happens on data bus. I use CPLD to decode the the address. But if I run the code in full speed (not step into each line), there is no problem. Is there something wrong with the exteral memory timing control? BTW, happy birthdday to 8052! Yu |
| Topic | Author | Date |
| external device I/O access problem | 01/01/70 00:00 | |
| Stepping invalidates timing | 01/01/70 00:00 | |
what hardware? | 01/01/70 00:00 |