| ??? 12/25/06 05:36 Read: times |
#130076 - Multiple Interrupts with Infrared RC5 |
Dear All, I normally connect TSOP1738 to one of the external Interrupt pins and decode RC5 address and command by interrupting main loop of polling switches. Problem came when I tried to implement phase control of a Triac and connected a zero crossing detector,of mains AC,to another external Interrupt pin.Now I had to deal with 3 interrupt vectors because a Timer has to be used,to measure time between zero crossings and then load the timer with desired delay (angle) for phase control.Only when the timer overflows and interrupts,the triac will be put on.It will be put off as soon as zero crossing detector has interrupted.Things will be slightly easier if a diode bridge is used in zero crossing so that I do not have to measure time between zero crossings and divide by two to arrive at Timer start points but then that zero crossing will interrupt every 10ms for 50Hz AC and clash with RC5 detection as and when it comes.AND AS SUCH IT IS CLASHING EVEN WITH 20 ms BETWEEN ZERO CROSSINGS. Shall I reduce the RC5 interrupt to bare minimum so as to just toggle a flag and poll that along with other switches? Or do away with RC5 interrupt completely and poll it instead? But total time taken by RC5 will remain same and clash with zero crossing.Oh!,what a dillema! The picture is at http://www.8052.com/users/Aso...Tmr0_1.gif Please help me.I have seen 8 pin PICmicros to do it and always bet that there is nothing which PICmicros can do and our 8052 cannot. I shall appreciate ideas,criticisms,suggestions.I have googled enough. With best Regards A.S.Rudra |
| Topic | Author | Date |
| Multiple Interrupts with Infrared RC5 | 01/01/70 00:00 | |
| Must be the technique you are using | 01/01/70 00:00 | |
| Test Zero Cross | 01/01/70 00:00 | |
| Couple of questions | 01/01/70 00:00 | |
| Do you disable interrputs when you are in ISR? | 01/01/70 00:00 | |
| use priority | 01/01/70 00:00 | |
| Peter,Please clarify | 01/01/70 00:00 | |
| RC5 within interrupt | 01/01/70 00:00 | |
| RC5 polling | 01/01/70 00:00 | |
| Quality workmanship... | 01/01/70 00:00 | |
| workmanship | 01/01/70 00:00 | |
| Dimmers | 01/01/70 00:00 | |
| Russel Please | 01/01/70 00:00 | |
| Some more points | 01/01/70 00:00 | |
| Dimmers | 01/01/70 00:00 | |
| that does not make sense | 01/01/70 00:00 | |
| Divide and Rule | 01/01/70 00:00 | |
instead of using your first choice, you state: | 01/01/70 00:00 | |
| C sample code | 01/01/70 00:00 | |
| Let me assimilate your code first | 01/01/70 00:00 | |
| .LST? | 01/01/70 00:00 | |
| About the 4n35 | 01/01/70 00:00 | |
| Thanks Jerson ,I corrected the picture | 01/01/70 00:00 | |
| Here | 01/01/70 00:00 | |
| F629FAN Schematic | 01/01/70 00:00 |