| ??? 03/29/05 13:26 Read: times |
#90586 - possibly this way Responding to: ???'s previous message |
I see a lot of discussion of PWM with the PCA. That, of course will not influence the frequency.
However, the PCA can be used to generate the frequencies as well. Set the compare to whatever count will generate the desired frequency, then, in the PCA ISR reset the counter and complement the output pin. This, of course gives no control over volume (unless you are extremely clever) but it does make the PCA the frequency generator. anyhow for "fun with the PCA" see The PCA cookbook http://www.intel.com/design/mc...270609.htm It refers to an ancient derivative, but the modern PCAs (at least those I know of) are identical except for the clocking options. Erik |
| Topic | Author | Date |
| PWM generation using microcontroller | 01/01/70 00:00 | |
| Whats your intention. | 01/01/70 00:00 | |
| PWM generation using microcontroller | 01/01/70 00:00 | |
| Freq. or duty cycle or both ? | 01/01/70 00:00 | |
| PWM? | 01/01/70 00:00 | |
| Amplitude? | 01/01/70 00:00 | |
| Amplitude control by PWM | 01/01/70 00:00 | |
| I agree... | 01/01/70 00:00 | |
| Back to the question | 01/01/70 00:00 | |
| Remote hugging.. | 01/01/70 00:00 | |
| Sorry guys... | 01/01/70 00:00 | |
| PWM generation using microcontroller | 01/01/70 00:00 | |
| Not at all! | 01/01/70 00:00 | |
| Varying both frequency and duty cycle. | 01/01/70 00:00 | |
| possibly this way | 01/01/70 00:00 | |
| thanxs but.................. | 01/01/70 00:00 | |
| PWM and frequency | 01/01/70 00:00 | |
| This thread is fuzzy because | 01/01/70 00:00 | |
Both frequency and amplitude? Yes! | 01/01/70 00:00 |