| Per Westermark 09/26/11 06:02 Read: 258 times Sweden |
#183872 - Remember no fractional part for Responding to: ???'s previous message |
Maunik Choksi said:
This way the minimum freq. of approx 45Hz & maximum greater than 10khz you may generate with 12MHz crystal. Note that the timer divisor is very short - only 16 bits - and that the input frequency is very low. So even if the total range is 45Hz to 10kHz, there will be very specific jumps between the different frequencies that may be generated. Because the division value doesn't contain any fractional part, the jump in resulting frequency will be higher for higher output frequencies. This is similar to a baudrate generator, where just about any crystal can be used for 300 baud, but att high baud speeds, you need a specific crystal frequency to keep down the error. |
| Topic | Author | Date |
| Need a little help with frequency | Ralph Sac | 09/16/11 21:32 |
| use 89c52 | Maunik Choksi | 09/16/11 23:00 |
| "formulae" | Stefan KAnev | 09/16/11 23:34 |
| How to post legible source code - and text | Andy Neil | 09/17/11 10:43 |
| Legible source code | Ralph Sac | 09/17/11 16:09 |
| Not the whole message! | Andy Neil | 09/17/11 16:16 |
| Thanks Andy got little messed up | Ralph Sac | 09/17/11 17:00 |
| Already answered | Per Westermark | 09/17/11 18:43 |
| Still not understanding isr with tick | Ralph Sac | 09/23/11 21:33 |
| use may use this code | Maunik Choksi | 09/23/11 23:19 |
| Thanks for time | Ralph Sac | 09/24/11 18:43 |
| Rewrote Source Code for Metalink Assembler | Ralph Sac | 10/20/11 18:36 |
| keil assembler | Maunik Choksi | 10/20/11 23:25 |
No need for picture | Maunik Choksi | 10/21/11 07:36 |
| try | Stefan KAnev | 09/23/11 23:34 |
| the code above is a typical illustration of ... | Erik Malund | 09/24/11 07:35 |
| You are right | Ralph Sac | 09/24/11 18:39 |
| never too old | Erik Malund | 09/25/11 06:46 |
| Never too late to pick up a new trick | Per Westermark | 09/25/11 09:10 |
| One good trick ... | Richard Erlacher | 09/25/11 13:49 |
| Score -1 | Michael Karas | 09/25/11 19:59 |
| Learn one before Jumping head | Ralph Sac | 09/26/11 21:11 |
| Learning Assembler First | Michael Karas | 09/27/11 00:41 |
| I wholehardely concur. | Erik Malund | 09/27/11 08:03 |
| Thanks also you for your time | Ralph Sac | 09/24/11 18:46 |
| Here's something to try ... | Richard Erlacher | 09/24/11 14:57 |
| One suggession for higher frequency | Maunik Choksi | 09/26/11 02:00 |
| Remember no fractional part for | Per Westermark | 09/26/11 06:02 |
| Precise frequency | Mahmood Elnasser | 09/26/11 09:00 |
| I did not know that | Ralph Sac | 09/26/11 21:15 |
| 89c2051 | Stefan KAnev | 09/26/11 22:10 |
| When you wrote code | Ralph Sac | 09/27/11 12:10 |
| You normally always need to test - but may not need to debug | Per Westermark | 09/27/11 15:20 |
| it was example | Stefan KAnev | 09/27/11 15:20 |
| Ok then if I | Ralph Sac | 09/27/11 15:40 |
| try | Stefan KAnev | 09/27/11 21:54 |
| depends | Erik Malund | 09/28/11 06:54 |
| Testing Code | Michael Karas | 09/28/11 07:25 |
| In short | Per Westermark | 09/28/11 08:41 |
| someone said it better | Erik Malund | 09/28/11 09:03 |
| "Proven Product" Syndrome | Andy Neil | 09/29/11 01:24 |
| Did you ever look at that MIDE51 I previously mentioned? | Richard Erlacher | 10/21/11 01:39 |