| ??? 03/06/04 08:13 Read: times |
#66098 - Serial IO Control Responding to: ???'s previous message |
Ahmed Barakat said:
want to know how would the MC know that the PC send or recieve from it while there's no hand shaking Look up the operation of the UART Interrupt, and the RI and TI flags. See "the bible" in the 'Links' section. Your serial IO can be interrupt-driven or polled: interrupt-driven serial IO uses the UART Interrupt to handle sending & receiving characters; polled serial IO continuously examines (or "polls") the flags. Ahmed Barakat said:
i'll need hand shaking so should i use other signals such as CST,RTS,DTR,DSR?? These are to do with flow control - they show when characters may be received or transmitted; they do not indicate when a character actually has been received or transmitted! |
| Topic | Author | Date |
| AT89C51Null modem connection | 01/01/70 00:00 | |
| Serial IO Control | 01/01/70 00:00 | |
| RE: Serial IO Control: Barakat | 01/01/70 00:00 | |
| RE: Serial IO Control - Andy | 01/01/70 00:00 | |
| RE: Serial IO Control - Andy | 01/01/70 00:00 | |
| RE: Serial IO Control | 01/01/70 00:00 | |
| RE: Serial IO Control | 01/01/70 00:00 | |
| RE: Serial IO Control | 01/01/70 00:00 | |
| RE: Serial IO Control | 01/01/70 00:00 | |
| RE: Serial IO Control | 01/01/70 00:00 | |
| Next step | 01/01/70 00:00 | |
RE: Next step | 01/01/70 00:00 | |
| Serial Interrupt will do it for you | 01/01/70 00:00 | |
| RE: AT89C51Null modem connection | 01/01/70 00:00 |