| ??? 11/15/05 19:59 Read: times |
#103768 - Interfacing AT89S8252 with RF receiver |
Hello all,
For a project I need to interface the Atmel AT89S8252 with the data output of a 434MHz RF receiver module. I connect this data output with a pull up resistor to +5V to the RxD pin of my controller. The serial data rate of the controller is set at 9600 baud. I wrote a serial interrupt handler that catches an ID-string of 2 bytes. The problem I encountered is that when there is no carrier wave (no transmitting), the data output of the RF receiver produces noise transitions at CMOS level (from 0 to 5V and vice versa). The RF module has no way to switch off this noise. This is causing a relay periodically switching on and off. Is there anyone wo has experience in interfacing such an RF module with a 8052?? What can I do to let the 8052 ignore the noise transistions and only response to the receiving Id-byte? Any help I will appreciate! Thanks, Max |
| Topic | Author | Date |
| Interfacing AT89S8252 with RF receiver | 01/01/70 00:00 | |
| use a checksummed packet | 01/01/70 00:00 | |
| question | 01/01/70 00:00 | |
| Is there ever no noise? | 01/01/70 00:00 | |
Encoding ? | 01/01/70 00:00 |