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pwm controller PWM1,PWM2,PWM3 |
operational
- PWM3 added v49.04 |
setup(pwm)
{
active=123; //to
enable the required combination of PWM's use 1,2,3 and N=none eg 1, 12, 13,
23, 3
or
active1=Y/N; active2=Y/N; active3=Y/N;
pol1=H;
//polarity = High or Low on first phase of PWM1
pol2=H;
//polarity = High or Low on first phase of PWM2
pol3=H;
cycle1=“200”;
//cycle
time in microseconds of PWM1. Range 160Hz to 1MHz
cycle2 = “300”;
//cycle
time in microseconds of PWM2. Range 160Hz to 1MHz
cycle3 = “300”;
//cycle
time in microseconds of PWM3. Range 160Hz to 1MHz
duty1= “44”;
//value of first phase as a percentage for
PWM1 = 1-99
duty2= “56”;
//value of first phase as a percentage for
PWM2 = 1-99
duty3= “56”;
//value of first phase as a percentage for
PWM3 = 1-99
delay= “50”;
//delay between first phase of PWM1 and first
phase of PWM2 in microseconds
}
PWM1 is pin 5 on CN4 and PWM2 is pin 6 on CN4. PWM3 is available on
CN7 pin 14.
Duty cycle values <1 are forced to 1 and values >99 are forced to 99 to
prevent a DC condition.
The parameter values can be adjusted using the LOAD command with a dot (.)
operator....LOAD(pwm.cycle1,350);
or using an adjustable variable as in LOAD(pwm.cycle1,cycvar);
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Update Information |
Version |
Title |
Date |
Details |
49.58 |
PWM |
07 Sep 15 |
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* Default duty cycle is now 0%
* 0% and 100% duty are now handled correctly
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00.01.00 |
PWM (0-7) functionality added |
13 Feb 15 |
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49.42 |
PWM / Backlight Conflict |
06 Sep 13 |
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* Fixed a problem with conflict with backlight channel. Caused a problem if BLED was set or error screen (as BLED is set to 100%)
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49.37 |
PWM - Higher Resolution using Float Parameters |
10 Jun 13 |
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PWM parameters cycle1, duty1, cycle2, duty2, cycle2, duty3 now accept float parameters giving greater PWM resolution.
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49.37 |
PWM - Extra PWM channel added - PWM4 |
10 Jun 13 |
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Added support for PWM4 (default use is backlight, link options on new PCB to connect to K07)
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49.32 |
PWM - Added 'prescale' setup parameter. |
14 Feb 13 |
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* Added 'prescale' setup parameter. Valid range is 1 to 10, default is 1. This divides the main clock to allow for lower frequency ranges.
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49.03 |
PWM - Added third PWM channel (on K09 port). |
01 Jun 12 |
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Added third PWM channel (on K09 port).
* Setup 'active' parameter can be either 'active = 1/2/12/123/13...' or active1 = Y/N, active2 = Y/N, active3 = Y/N.
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44.00 |
PWM - Duty values of < 1 are forced to 1 and values > 99 forced to 99 to avoid runtime error. |
20 May 11 |
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Duty values of < 1 are forced to 1 and values > 99 forced to 99 to avoid
runtime error
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32.00 |
PWM - PWM ranges increased to 160Hz-1MHz. |
14 Oct 10 |
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PWM ranges increased to 160Hz-1MHz.
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23.00 |
PWM - PWM implemented with period of 1us to 1ms. |
17 Aug 10 |
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PWM implemented with period of 1us to 1ms
(further work required to get it up to 10ms).
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