??? 03/12/07 06:37 Modified: 03/12/07 06:38 Read: times |
#134739 - I do not agree Responding to: ???'s previous message |
Jecksons Ben said:
when we received "NO Carrier" rxd must check string data input and compare to the "NO Carrier" at the memory.(lot of instructions)
It is simple to check only the DCD(with level converter) signal at interupt or (else) pin of AT89. thank's JBJ DCD is low when transmission starts, and remains low if no carrier is detected. How will you activate the interrupt if it is inactive and remains inactive? regards Patrick |