| ??? 08/25/05 11:44 Read: times |
#100061 - Doubtful Responding to: ???'s previous message |
Jeff Corr said:
1. I don't know how to generate this type of PWM signal on IO pins and I'm not even sure it can be done. You will find its probably impossible to get real time image performance off PWM anyway. Think of the speed with which you need to change the PWM output, as a function of the PWM frequency, and think how long the filter has to act on that before you change duty cycles. When I did it, I used 8 channel 8 bit DACS, arranged as a kind of analogue computer. I could get 255 points per frame at 25 frames/second, with image rotation, scale and translation. Steve |
| Topic | Author | Date |
| Laser projecter / 8051 timer/PWM | 01/01/70 00:00 | |
| Doubtful | 01/01/70 00:00 | |
| if speed is an issue | 01/01/70 00:00 | |
| DAC | 01/01/70 00:00 | |
| To reduce the data amount to transfer | 01/01/70 00:00 | |
| table | 01/01/70 00:00 | |
| No free lunch! | 01/01/70 00:00 | |
| understandable | 01/01/70 00:00 | |
| table and another approach... | 01/01/70 00:00 | |
| VC program finished | 01/01/70 00:00 | |
| Interrupt-driven Serial IO | 01/01/70 00:00 | |
| stuck in a rut as so amny before you, wh | 01/01/70 00:00 | |
| F120 overkill | 01/01/70 00:00 | |
that may be, but the proposed 12 clocker | 01/01/70 00:00 |