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| Search found 26 matches |
| Author | Message |
|---|---|
 Topic: ECCP Half-Bridge PWM (Hardware Issue) |
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| marcusayoung Replies: 3 Views: 8744 |
 Forum: General CCS C Discussion Posted: Sun Aug 28, 2011 2:19 pm Subject: ECCP Half-Bridge PWM (Hardware Issue) |
| Ah yes!
The LUT has 256 samples, but the PWM register is 10-bits. Looks like i need more values if i want perfect compliments. |
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| Topic: ECCP Half-Bridge PWM (Hardware Issue) |
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| marcusayoung Replies: 3 Views: 8744 |
Forum: General CCS C Discussion Posted: Sun Aug 28, 2011 11:01 am Subject: ECCP Half-Bridge PWM (Hardware Issue) |
| Hi All,
I'm using a 16F1823 and i'm also seeing this issue with a 16F684. I've been working with the ECCP/PWM module to generate a sine wave with some external RC filtering. The method is straig ... |
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| Topic: PWM AMPLITUDE issue (not software related) |
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| marcusayoung Replies: 2 Views: 3234 |
Forum: General CCS C Discussion Posted: Fri Oct 02, 2009 9:00 pm Subject: PWM AMPLITUDE issue (not software related) |
| Hi all,
Sorry this isn't a code question, but i can't turn up much in a search. I'm using a 12F615 to output a pair of "complimentary" PWM signals on GPIO0 and GPIO2 (these are the def ... |
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| Topic: Frequency Measuring using IOC |
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| marcusayoung Replies: 4 Views: 6050 |
Forum: General CCS C Discussion Posted: Wed Sep 23, 2009 10:59 am Subject: Frequency Measuring using IOC |
| More info: range of frequencies i am interested in measuring are 8kHz-100kHz.
The constant that gets generated will be used to flash an LED and gets stored in memory each time the frequency changes ... |
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| Topic: Frequency Measuring using IOC |
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| marcusayoung Replies: 4 Views: 6050 |
Forum: General CCS C Discussion Posted: Wed Sep 23, 2009 7:08 am Subject: Frequency Measuring using IOC |
| Hi Folks,
I'm interested in measuring square wave frequency with a 12F683. I've seen other posts about this using capture on a CCP module, but is there another way with, say, IOC (i'm just thinking ... |
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| Topic: PIC GPIO inverter |
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| marcusayoung Replies: 8 Views: 8027 |
Forum: General CCS C Discussion Posted: Fri Aug 07, 2009 1:32 pm Subject: PIC GPIO inverter |
| The clock frequency is 8MHz. PWM varies between 9kHz - 100kHz.
I definitely want the compliment output to scale very close to the original, so i would rate the tolerance at +/- 5%. I think the c ... |
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| Topic: PIC GPIO inverter |
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| marcusayoung Replies: 8 Views: 8027 |
Forum: General CCS C Discussion Posted: Fri Aug 07, 2009 7:09 am Subject: PIC GPIO inverter |
| Right, this is what i said above. But is this possible to realize with a PIC and extra GPIO?
Thanks |
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| Topic: PIC GPIO inverter |
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| marcusayoung Replies: 8 Views: 8027 |
Forum: General CCS C Discussion Posted: Thu Aug 06, 2009 4:21 pm Subject: PIC GPIO inverter |
| I'm using a 12F683 to generate a PWM. Is it possible with this one CCP module to generate a complimentary output of the PWM signal on another GPIO (other than the one used to generate the PWM on GPIO2 ... | |
| Topic: Dual clocks from one PIC12F675 |
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| marcusayoung Replies: 21 Views: 24374 |
Forum: General CCS C Discussion Posted: Mon Jul 20, 2009 11:06 am Subject: Dual clocks from one PIC12F675 |
| ok, I figured it out. I achieved a 10khz-100khz oscillator with an acceptable resolution.
If that's not satisfactory, then answer this question: Is generating a frequency the only thing the PIC ... |
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| Topic: Dual clocks from one PIC12F675 |
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| marcusayoung Replies: 21 Views: 24374 |
Forum: General CCS C Discussion Posted: Thu Jul 16, 2009 3:13 pm Subject: Dual clocks from one PIC12F675 |
| Ok, i see what you mean.
Is "setup_timer_x()" and "set_pwm1_duty()" simply loading each register associated with the PWM module with the values i'm looking for according to the ... |
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| Topic: Dual clocks from one PIC12F675 |
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| marcusayoung Replies: 21 Views: 24374 |
Forum: General CCS C Discussion Posted: Thu Jul 16, 2009 2:30 pm Subject: Dual clocks from one PIC12F675 |
| You need to do some physical tests. I just now programmed a 12F683
to do a 100 KHz square wave, 50% duty cycle, with the PWM module. I can see the signal on my oscilloscope. However, one problem ... |
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| Topic: Dual clocks from one PIC12F675 |
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| marcusayoung Replies: 21 Views: 24374 |
Forum: General CCS C Discussion Posted: Wed Jul 08, 2009 3:42 pm Subject: Dual clocks from one PIC12F675 |
| here is the link to the datasheet:
http://ww1.microchip.com/downloads/en/DeviceDoc/41211D_.pdf page 1 (under Peripheral features) states: "- 10-bit PWM, max frequency 20 kHz." But n ... |
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| Topic: Dual clocks from one PIC12F675 |
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| marcusayoung Replies: 21 Views: 24374 |
Forum: General CCS C Discussion Posted: Wed Jul 08, 2009 7:40 am Subject: Dual clocks from one PIC12F675 |
| Oops, that was me above ^ | |
| Topic: Dual clocks from one PIC12F675 |
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| marcusayoung Replies: 21 Views: 24374 |
Forum: General CCS C Discussion Posted: Tue Jul 07, 2009 1:40 pm Subject: Dual clocks from one PIC12F675 |
| The whole goal of the program is to produce the aforementioned variable clock based on one or the other of two registers: the ADC or a TIMERX. I was planning on working out the "one or the other& ... | |
| Topic: Dual clocks from one PIC12F675 |
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| marcusayoung Replies: 21 Views: 24374 |
Forum: General CCS C Discussion Posted: Tue Jul 07, 2009 12:58 pm Subject: Dual clocks from one PIC12F675 |
| In a similar question, but now disregarding the 1Hz solution for now...
Is it possible to achieve a variable 10kHz-100kHz (50% duty cycle, amplitude irrelevant) through the use of a potentiometer/A ... |
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