| ??? 05/28/09 10:46 Read: times |
#165667 - I can suggest 2 methods Responding to: ???'s previous message |
Dear Batu,
Batu C. said:
Hi All,
I need suggesiton about interrupt execution for more than two external sources. ...But I have three interrupt sources on my design. First one is PCF8583-clock/calender chip, second one is ADE7753 Energy Meter chip and the last one is push-buttons which have been tied eachother with a wired-OR connection and inverted by a transistor.(to produce an interrupt signal). ... Firstly, I thought: if I combine all these three interrupt signals by a wired-OR connection again and apply this mutual interrupt signal to one of the external interrupt input of the microcontroller, so that I can sense that one of the perihherals is requesting an execution. And if I immediatelly control a three-pin port which is connected to all interrupt lines seperately, I can understand which periheral is acting. But, I could not be sure whether I'll be able to capture the source or not. Could you let me know your valuable suggestions please? Best Regards, Batu 1. There is 1 possible solution that you yourself has thougth (But you are not able to convience yourself). Only thing I fail to understand why 3 signals ORed. You want an interrupt when any low or all low 2. Also input pin for Timer-2 also can be used as an interrupt pin.(HOW? For details please read regarding timer 2) Regards, Mahesh |
| Topic | Author | Date |
| Multiple Interrupt Sources | 01/01/70 00:00 | |
| Do you really need 3? | 01/01/70 00:00 | |
| I need 3 different Int. Sources | 01/01/70 00:00 | |
| Timer 2 capture mode | 01/01/70 00:00 | |
| I can suggest 2 methods | 01/01/70 00:00 | |
| Thanks For T2 | 01/01/70 00:00 | |
T2 | 01/01/70 00:00 |