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Recent Forum Posts

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

lester

GPS Shield

The Amicus GPS shield contains a multi channel GPS receiver, as well as a 16k byte (128 kbit) serial (I2C) eeprom, and a 3 Volt, 12mm battery socket in order to maintain the receiver's built-in RTC (Real Time Clock).

Available in our on-line store

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Comprehensive documentation

Published on - 30th August 2011 05:03

Comprehensive documentation and a helpful and friendly support environment, make using Amicus18 an easy and enjoyable ...

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Companion Sheild

The entry level shield is labelled The Companion Shield. This is a PCB laid out in the pattern of a solderless breadboard. The holes are single sided, which means that components can easily be removed using solder mop braid, or a solder vacuum tool, if a mistake is made, or components need to be re-used.

The (PBP3) Companion Shield Manual iCan be downloaded from here

See the Companion Shield in our on-line shop
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What is Amicus18?

Amicus is a multifunction development system inspired by the popular Arduino board, however, the Amicus board uses a Microchip PIC^® microcontroller instead of an Atmel AVR^tm type.

Comprehensive documentation and a helpful and friendly support environment, make using Amicus18 an easy and enjoyable experience for beginners and seasoned programmers.

Forum Moderator Mackrakit (Dave) very kindly ported the Proton BASIC Compiler code over to PBP3 and modified the original AMicus18 docuemts for PBP3 users.

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The Amicus18 Board

Amicus18 is an embedded system platform based on a simple open hardware design for a single-board microcontroller, with embedded I/O support and a standard programming language. A great Partner for PBP3 and Perfect for the PBP3 Experimenter.

AMICUS18 in our on-line shop

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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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Supported Devices

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3 x 7 segments LED display

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Dice Project

PICBASIC PRO Electronic Dice project for the PIC10F202 or PIC10F206. Written by Melanie Newman

...

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lester