| ??? 02/14/05 19:44 Read: times |
#87426 - Transition reversed from the bible Responding to: ???'s previous message |
Thanks for the answers
The issue is however that the interrupt is reversed in the transition ie to fire the interrupt I have to do this Ugly Ascii Art ------------|_____|-------- ------------------| -----------INT Occurs Here Pretty Ascii Art ____________ ______________ | | | | | | |_______________| | | INT Occurs here! (Please excuse the 2 versions of the ascii art when doing a preview the spaces seemed to get lost with the pretty ascii art version (I left it in to see if it actually posts OK)) so even though I have the input sitting high, I have to pull it low and then the Int does not fire until I realease the input. It seems as though I have something set wrong perhaps EX0 = 1; //Enable External Interrupt 0 IT0 = 1; //Transition Activiated Interrupt This is all I am doing to init the interrupt (and EA of course), is there anything else I should do? |
| Topic | Author | Date |
| Ext Interrupt - Transition Activated | 01/01/70 00:00 | |
| Turn a falling edge into a rising edge? | 01/01/70 00:00 | |
| Did you read the | 01/01/70 00:00 | |
| both interrupts possible | 01/01/70 00:00 | |
| I use this | 01/01/70 00:00 | |
| I use PCA | 01/01/70 00:00 | |
| not on AT89C2051 ! | 01/01/70 00:00 | |
| who forces him | 01/01/70 00:00 | |
| Who forces? The circumstances. | 01/01/70 00:00 | |
| New Zealand | 01/01/70 00:00 | |
| Yes, the perspective! | 01/01/70 00:00 | |
| because | 01/01/70 00:00 | |
| I also use AT89C51RC2 | 01/01/70 00:00 | |
| little boy | 01/01/70 00:00 | |
| That's why not | 01/01/70 00:00 | |
glady | 01/01/70 00:00 | |
| Don't underestimate the good old USA | 01/01/70 00:00 | |
| two views | 01/01/70 00:00 | |
| Two academic questions | 01/01/70 00:00 | |
| suggestions | 01/01/70 00:00 | |
| Transition reversed from the bible | 01/01/70 00:00 | |
| language | 01/01/70 00:00 | |
| clarification on the language | 01/01/70 00:00 | |
| something smells | 01/01/70 00:00 | |
| Defective Chip | 01/01/70 00:00 | |
| we have all been there | 01/01/70 00:00 | |
| OK - I'll have a sleep | 01/01/70 00:00 | |
| glitchy? | 01/01/70 00:00 |