| ??? 03/30/05 12:55 Read: times |
#90676 - PWM and frequency Responding to: ???'s previous message |
...set PCA counter in PWM mode.
Using this setting," Is it possible to generate frequencies of 1Khz and 500 Hz ??????" The only way you can combine PWM and varying frequencies is by driving the PCA from a timer. With the PCA only you do NOT do PWM, but use the PCA as a timer. P89C51Rx2 data sheet page 37 "16-bit Software Timer Mode The PCA modules can be used as software timers by setting both the ECOM and MAT bits in the modules CCAPMn register. The PCA timer will be compared to the module’s capture registers and when a match occurs an interrupt will occur if the CCFn (CCON SFR) and the ECCFn (CCAPMn SFR) bits for the module are both set (see" 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 |