| ??? 02/18/05 10:46 Read: times |
#87867 - 3/4 milliseconds Responding to: ???'s previous message |
Massimo Battiston said:
Unfortunately seems that windows adds a minimun of 3/4 milliseconds between reception of result and send of next command. Maybe the timing are too critical for windows! I presume "3/4 milliseconds" means "between 3ms and 4ms" rather than 0.75ms (three-quarters of a millisecond)? The program running on PC side is developed in delphi using the VCL control CPORT. J tried both windows 98 /XP and get similar results. Are you using the FIFO on your COM port? It could be that it's waiting for the FIFO to fill, or for a 3-4ms timeout... Some Windoze serial components I have seen have a separate thread that collects characters, and only forwards them to the main thread when it has a full buffer, or a timeout is reached. |
| Topic | Author | Date |
| Windows and serial communication | 01/01/70 00:00 | |
| Delphi component | 01/01/70 00:00 | |
| C++ Builder Component | 01/01/70 00:00 | |
| thanks! | 01/01/70 00:00 | |
| 3/4 milliseconds | 01/01/70 00:00 | |
| More precisely... | 01/01/70 00:00 | |
| Poll Start - Poll Stop Commands | 01/01/70 00:00 | |
| Windows timing | 01/01/70 00:00 | |
| Win Timers | 01/01/70 00:00 | |
| Unsolicited Responses | 01/01/70 00:00 | |
| Some Practical Experience | 01/01/70 00:00 | |
Thanks for the suggestions | 01/01/70 00:00 |