PIC 18F4550, firmware

Hi,

I recently started to use PICBASIC PRO, and trying to write a code which will simply light a led. While using bootloader I recognized that I need to allocate some free space for firmware. How can I do this in PICBASIC? In CCS C, it is possible to write such a code like this.

#build (reset=0x800)
#build (interrupt=0x808)
#org 0x0000, 0x07ff
void bootloader () {

#asm
nop
#endasm
}

Quote:

---

Originally Posted by kutsi

Hi,
I recently started to use PICBASIC PRO, and trying to write a code which will simply light a led. While using bootloader I recognized that I need to allocate some free space for firmware. How can I do this in PICBASIC? In CCS C, it is possible to write such a code like this.
#build (reset=0x800)
#build (interrupt=0x808)
#org 0x0000, 0x07ff
void bootloader () {
#asm
nop
#endasm
}

---

Which bootloader are you using?
Which PIC are you using?
Which version of PBP are you using?
Why would you need to allocate free space for firmware while using a bootloader?
How complicated is this 'shine an led' program of yours?

I guess, firmware needs first 2kb of the memory.Therefore the first 800h bits must be allocated...

PIC18F4550
PICDEM FS USB DEMO TOOL VERSION 1.00

Quote:

---

Originally Posted by kutsi

I guess, firmware needs first 2kb of the memory.Therefore the first 800h bits must be allocated...

PIC18F4550
PICDEM FS USB DEMO TOOL VERSION 1.00

---

As long as your bootloader is supported by PBP, then you shouldn't have to worry about anything.
What about the rest of the questions?

Define ONINT_USED 1

LED var PORTL.0 ' Alias PORTB.0 to LED

loop: High LED ' Turn on LED connected to PORTL.0
Pause 500 ' Delay for .5 seconds

Low LED ' Turn off LED connected to PORTL.0
Pause 500 ' Delay for .5 seconds

Goto loop
End
This is a simple example from the guide.
Do I need to define anythin further? osc 20mhz?

PBP 2.46

Quote:

---

Originally Posted by kutsi

Define ONINT_USED 1
LED var PORTL.0 ' Alias PORTB.0 to LED
loop: High LED ' Turn on LED connected to PORTL.0
Pause 500 ' Delay for .5 seconds
Low LED ' Turn off LED connected to PORTL.0
Pause 500 ' Delay for .5 seconds
Goto loop
End
This is a simple example from the guide.
Do I need to define anythin further? osc 20mhz?

PBP 2.46

---

Which page is 'Define ONINT_USED 1' on in the guide?

And since when does a PIC18F4550 have a PortL?

PORTL.0 is a user defined variable for PORTB.0
PAGE 6

Quote:

---

Originally Posted by kutsi

PORTL.0 is a user defined variable for PORTB.0
PAGE 6

---

It is? That's a good trick! How about this...
PortL encompasses pins 0 - 7 (PortB for a 40 pin PIC), and PortH encompasses pins 8-15 (PortC for 40 pin PIC).
At least they do according to pg.26 and 27 (section 4.11).

Now then, how about the rest of the questions...again...

PBP 2.46
mplab ICD 2 as programmer
mplab IDE 7.5

anything missing?

Quote:

---

Originally Posted by kutsi

PBP 2.46
mplab ICD 2 as programmer
mplab IDE 7.5

anything missing?

---

Yep...see post #6...
What does 'Define ONINT_USED 1' mean?

I don't know exactly what it means. Actually this is a sample code from PBP. The name is Blink.bas

Quote:

---

Originally Posted by kutsi

I don't know exactly what it means. Actually this is a sample code from PBP. The name is Blink.bas

---

And it probably says it was written for an older version of PBP.
If you do a search here for ONINT_USED, you'll see why that isn't going to work for you...

thanks a lot, it works...

Quote:

---

Originally Posted by kutsi

thanks a lot, it works...

---

Good deal... :)
That's probably my one time this month I'll be of any use to anybody. The rest of this month, I'm just going to sit in a pile of my own drool... :D