Swordfish

In order to get exactly 38000Hz I think you'd have to have a clock that's a multiple of 4.864MHz.

With that, you could use the CCP/ECCP peripherals in PWM mode to get 38000 and 19000 and still do other things with the pic.

so I tried to changes some PORTB I/O to get half value with both other PORTB, now looks more better but still need to reduce little smaller Sorry, but I don't understand what you need. What does "half value with both other PORTB" mean? Can you explain what you are looking for any better? What are t...

As you can see, almost I reach the point, only the PORTB6 on a top picture I need to reduce to reach till half value refer to PORTB0 and PORTB1, can you please help, what is should I change to reach half value than both PORTB0 and PORTB1. I'm sorry, but I don't understand the question. I don't use ...

'SetAllDigital()' is a subroutine call, so it has to be located after all the variables are declared Device = 18F2550 //uC use Clock = 20 // Use external crystal Config PLLDIV = 5, // Divide by 5 (20 MHz oscillator input) CPUDIV = OSC1_PLL2, // [Primary Oscillator Src: /1][96 MHz PLL Src: /2] USBDIV...

I think your 'while' statement isn't doing what you want. While PORTB = %11111110 LATB.0 = 0 is being evaluated as While (PORTB = %11111110) LATB.0 = 0 If you want to create an infinite loop then change that to While (true) PORTB = %11111110 LATB.0 = 0 ' other statements end while You should be sure...

I created an updated version of David Eather's PseudoRandomNumberGenerator. See PseudoRandomNumberGeneratorV2 This is a single file implementation (no copying/renaming/changing code) that supports byte, word, longword, and floats. You simply select the data type of interest using #option RAND_T befo...

It looks like you're using examples from another form of BASIC. I would read through the Swordfish language manual, but try this. At least it will compile. The issue wasn't with the config statement, it was with all the other stuff. device = 18F2550 //uC use clock = 20 // Use external crystal config...

You might give this a try... I took what you had and added a timeout to the capture() routine. There are some other misc changes and corrections, just look for the 'jm' comments I changed a few variable names just so I could keep track of what was going on (mostly register bit names). { ************...

This part here is going to cause problems: INTCON = $C0 ' Enable interupts *** Don't think I need this for the T3Gate if I am polling it **** T3_GIR = true ' Enable Timer1 Gate Mode Interupt I wouldn't recommend directly writing to the INTCON register (that's what the enable()/disable() statements a...

Ok, let's look at the whole 'Timer.Items(x)' part first... Each 'timer' (ie 'timer item') gets a data structure allocated to it that contains all the details for that timer // a timer item structure... structure TTimerItem Enabled as boolean Interval as TInterval OnTimer as TEvent #if TIMER_AUTO_REL...

There is a new compiler update 2.2.4.0 available for registered users. Download: http://www.mecanique-web.co.uk/downloads/swordfish-si.exe and enter your activation key to install. You can view a list of changes here: https://www.sfcompiler.co.uk/wiki/pmwiki.php?n=Swordfish.VersionHistory For the SE...

check your PM. The ICC v1.2.1.0 update is a separate download for v2.2.3.8 See https://www.sfcompiler.co.uk/wiki/wiki-uploads/SwordfishUser/Modules/sf_update_3_1_2023b.zip ... which is now superseded by the 2.2.4.0 online update, which includes ICC v1.2.1.0 After performing the update to 2.2.4.0 you...

I agree. After writing that I realized how complicated a topic it can be, especially for someone not versed in all the details of the 18F. We'll have to see if I can come up with something that helps make sense of it. Since the original question was about the usage of TABLEPTR, I added that to the a...

There's a new wiki article on Interrupt Context Saving in an ISR where I go into depth on the subject.

I finally got around to writing something up.
See the wiki article on Interrupt context saving

I think I may try my hand at developing an app to aid in all this, sort of an "ISR Adivsor" tool...