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| Search found 239 matches |
| Author | Message |
|---|---|
 Topic: WDT |
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| carl Replies: 2 Views: 6460 |
 Forum: General CCS C Discussion Posted: Fri Jul 31, 2015 8:29 am Subject: WDT |
| Excellent,
All working as it should:) Much appreciated. |
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| Topic: WDT |
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| carl Replies: 2 Views: 6460 |
Forum: General CCS C Discussion Posted: Fri Jul 31, 2015 6:31 am Subject: WDT |
| Hi all,
Hope you can help. Some pre-requisites: Compiler Version 4.141 Using 16f877 Using MPLAB (in release mode, WTD enabled in settings). I have never used the WDT function ever - always ... |
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| Topic: Counting Pulses Method 'Tachometer' |
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| carl Replies: 21 Views: 31559 |
Forum: General CCS C Discussion Posted: Thu Nov 20, 2014 8:59 am Subject: Counting Pulses Method 'Tachometer' |
| Agreed.
Thanks for all your help guys! |
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| Topic: Counting Pulses Method 'Tachometer' |
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| carl Replies: 21 Views: 31559 |
Forum: General CCS C Discussion Posted: Thu Nov 20, 2014 8:27 am Subject: Counting Pulses Method 'Tachometer' |
| Hi Jay,
Its not the cost, but the application is very lower power (WiFi Encoder) that lasts for over a year from battery and ordinarily 'critical' timing is not required for the current application ... |
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| Topic: Counting Pulses Method 'Tachometer' |
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| carl Replies: 21 Views: 31559 |
Forum: General CCS C Discussion Posted: Thu Nov 20, 2014 7:52 am Subject: Counting Pulses Method 'Tachometer' |
| Understood Ttelmah and thanks for your input.
The primary goal is within 1% and if it is achievable without changing the hardware, then that is the main priority. The PCB design is already in use f ... |
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| Topic: Counting Pulses Method 'Tachometer' |
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| carl Replies: 21 Views: 31559 |
Forum: General CCS C Discussion Posted: Wed Nov 19, 2014 11:42 am Subject: Counting Pulses Method 'Tachometer' |
| thanks mike,
totally understand and agree. the logic is not correct. will look at this again tomorrow. carl |
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| Topic: Counting Pulses Method 'Tachometer' |
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| carl Replies: 21 Views: 31559 |
Forum: General CCS C Discussion Posted: Wed Nov 19, 2014 10:29 am Subject: Counting Pulses Method 'Tachometer' |
| Hi PCM,
Let me have a think about this tomorrow - thanks for all your help as always. |
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| Topic: Counting Pulses Method 'Tachometer' |
|
| carl Replies: 21 Views: 31559 |
Forum: General CCS C Discussion Posted: Wed Nov 19, 2014 10:04 am Subject: Counting Pulses Method 'Tachometer' |
| Hi PCM,
Thanks so much for replying. whilst you have written this, I have worked it out. The way I was using the formula was incorrect. I thought that 1 loop meant one timer period = 49.98ms ... |
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| Topic: Counting Pulses Method 'Tachometer' |
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| carl Replies: 21 Views: 31559 |
Forum: General CCS C Discussion Posted: Wed Nov 19, 2014 6:15 am Subject: Counting Pulses Method 'Tachometer' |
| Its way out!
changed the loops to 'one' = tick every 49.92mS. sensor_pulses = 180 at 2000rpm. plugging 180 into the equation gives: RPM = ((180/0.04992) / 52) * 60 RPM = 4160 either my c ... |
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| Topic: Counting Pulses Method 'Tachometer' |
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| carl Replies: 21 Views: 31559 |
Forum: General CCS C Discussion Posted: Wed Nov 19, 2014 3:16 am Subject: Counting Pulses Method 'Tachometer' |
| Preview
PostPosted: Wed Nov 19, 2014 3:13 am Post subject: Hi PCM, I will look into it, but potentially what could be the issue? Could the two interrupts be in conflict? so if the prog ... |
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| Topic: Counting Pulses Method 'Tachometer' |
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| carl Replies: 21 Views: 31559 |
Forum: General CCS C Discussion Posted: Tue Nov 18, 2014 4:49 pm Subject: Counting Pulses Method 'Tachometer' |
| Thanks for replying.
Simplifying the maths doesn't make any difference. Initially i just transmitted the 'sensor_pulses' alone, so no maths at all, and then this value was plugged into the rpm eq ... |
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| Topic: Counting Pulses Method 'Tachometer' |
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| carl Replies: 21 Views: 31559 |
Forum: General CCS C Discussion Posted: Tue Nov 18, 2014 9:53 am Subject: Counting Pulses Method 'Tachometer' |
| Hi All,
I am a bit stuck, and hope you can help. I am trying to measure accurate RPM (within 1%) when using a 13ppr quad encoder (so 52 edge detection per revolution). Max speed is 2000rpm. min S ... |
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| Topic: Interrupt on change |
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| carl Replies: 7 Views: 10862 |
Forum: General CCS C Discussion Posted: Mon Jun 30, 2014 3:47 am Subject: Interrupt on change |
| As always
Thanks so much!! |
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| Topic: Interrupt on change |
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| carl Replies: 7 Views: 10862 |
Forum: General CCS C Discussion Posted: Mon Jun 30, 2014 3:32 am Subject: Interrupt on change |
| Hmmm,
I see it - thanks Ttelmah! I haven't got a clue however how to set this up in code. Have you any examples? I'll have a look in the forum as well. Thanks Carl |
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| Topic: Interrupt on change |
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| carl Replies: 7 Views: 10862 |
Forum: General CCS C Discussion Posted: Mon Jun 30, 2014 2:59 am Subject: Interrupt on change |
| Hmmm,
Thanks for replying Ttelmah! This would be good if I could find one. Using the search option for my application (5V, 30 MIPS, 80 pin) on microchip only gives me five options (dsPIC30F5013 ... |
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