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Recent Forum Posts

Frequency Counter

Long time ago, Microchip had that AN592 to show how a PIC16C54 can measure up to 50MHz frequencies, which was indeed very impressive.

About 6 years ago this Instructable by user WilkoL did a High...
Ioannis Today, 15:13

Re: Converting PBP interrupt to ASM - 18F25K20

maybe like this

https://youtu.be/PQrvgA-w0gk

steps through an array to set portb pin and another array to set timer interval for next interrupt , repeats every 6th pass

ra0 toggles every...
richard Today, 06:10

Re: Converting PBP interrupt to ASM - 18F25K20

as an example this is what i came up with for your first question

#CONFIG
CONFIG FOSC=INTIO67, FCMEN=OFF, IESO=OFF, PWRT=OFF, BOREN=SBORDIS, BORV=18
CONFIG WDTEN=ON, WDTPS=512,...
richard Today, 00:49

Re: Converting PBP interrupt to ASM - 18F25K20

whether the vars are in the same bank or not is irrelevant with indirect addressing, the point is that with pic18 chips an array can be more than 255 bytes in length and may cross a bank boundary. ...
richard Today, 00:44

Re: Converting PBP interrupt to ASM - 18F25K20

Thanks for the insight! I ended up putting all the variables used in the ISR in bank 3 and starting the interrupt with "banksel _ppm_n" in case I every move them to a different bank. I may not need...
achilles03 Yesterday, 21:11

Re: Converting PBP interrupt to ASM - 18F25K20

The Access Bank consists of the first 96 bytes of memory(00h-5Fh) so if you create your asm vars in that space you can use the opcode access field rather than needing to switch banks

eg
ppm_n...
richard Yesterday, 03:27

Re: Converting PBP interrupt to ASM - 18F25K20

Thank you for your feedback! The test code seems to work ok, but when I roll this ISR into my main program, it could occur at any time so it seems setting the correct bank would be important.
...
achilles03 Yesterday, 03:01

Re: Converting PBP interrupt to ASM - 18F25K20

looks close but if the vars used in asm are not in access ram you still need to ensure the correct bank is set, it may look likes it works depending on where the compiler places your vars but its ...
richard Yesterday, 00:16

Re: Converting PBP interrupt to ASM - 18F25K20

I might have figured it out. It looks like I wasn't loading the full pointer into FSR0 since it's a 12-bit pointer. Also I hit on the POSTINC0 option, which is nifty. I believe the ISR should be...
achilles03 - 12th February 2026, 20:58

Converting PBP interrupt to ASM - 18F25K20

I have a couple interrupt routines using DT's instant interrupts in PBP that I'd like to convert to asm to reduce execution time. One of the ISRs uses an external interrupt to time pulses and store...
achilles03 - 12th February 2026, 18:10

PICBASIC PRO™ Compiler 3.0 PBP is a BASIC programming language for Microchip's PIC microcontrollers.

Version 3 is a major evolution of this popular product, making it even more capable, stable, and reliable. All the years of development culminate here, with many new capabilities and improvements. Come see why thousands of engineers, educators and hobbyists have depended on PBP for more than a decade.

Supports more than 500 microcontrollers.
Newly revised 300-page manual.
MPLABX compatible

Visit our secure online shop to order

Software activation keys are delivered electronically after purchase.
15 Day Trial Before Activation Key is Required

If installed without an activation code, the software will be fully functional for 15 days.
Read about Product Activation

PBP 3.0 Gold Edition

Supports more than 500 devices.

PBP 3.0 Silver Edition

Supports Mid-Range devices.

Number of computer installations allowed 3
(May be uninstalled and moved. License is for single user.)

Maximum supported clock frequency 64Mhz

Maximum supported clock frequency 20Mhz

Commercial License

What is PBP?

PBP is a BASIC programming language for Microchip's PIC microcontrollers.

It has evolved over the span of 15 years, making it the industry standard in its field. It has become a professional-level development tool for embedded programmers, though it retains the easy-to-learn syntax that makes it popular among experimenters and educators worldwide.
...

Compare Editions

PBP3 is available in THREE editions, Chose the right one for YOU!. From Experimenter - enough for the hobbyist through Silver & GOLD - strong enough for a Pro. Including commercial licenses and annual update packages.

...

Features

PICBASIC PRO™ Compiler 3.0

Familiar BASIC syntax
- IF (condition) THEN / ELSE / ELSEIF /ENDIF
- SELECT CASE
- FOR… NEXT
- DO WHILE/UNTIL

...

MicroCode Studio Plus 5.0

MicroCode Studio Plus 5.0 (compatible with PBP 3.0 or later)
The main editor provides full syntax highliMicroCode Studio Plus is a powerful, visual Integrated Development Environment (IDE) with In Circuit Debugging (ICD) capability designed specifically for PICBASIC PRO™ Compilerghting of your code with context sensitive keyword help and syntax hints. The code explorer allows you to automatically jump to include files, defines, constants, variables, aliases and modifiers, symbols and labels, that are contained within your source code. Full cut, copy, paste and undo is provided, together with search and replace features.
...

Supported Devices

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Product Activation

When installed PBP3 will operate in trial mode for 15 days, we recommend that you TRY PBP3 BEFORE you buy PBP3. Be sure that you are happy with the product and the facilities it offers

After purchasing your PBP3 license, the product may be activated by entering the activation key as prompted by the application, this process should be carried out whilst your host machine has access to the internet. Activation requires that the machine can contact the melabs activation service.
...

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