Anyone found a Bootloader for 18F26K22?

[Dave]

Hello Freinds, I was wondering if anybody has come across a bootloader for an 18F26K22. I talked to David Barker (Microcode Studio) via Email and he said maybe in the future he will tackle it but no time frame yet. I have an application for replacing an 18F2620 which I require a second comm port. I tried the DS-30 bootloader but to no avail. I'm still looking... Thanks in advance....

[HenrikOlsson]

Hi Dave,
I was going to suggest the DS30 loader since I've had success with on a 18F25K22. I don't have a 26K22 to play with but what's the problem you're having with it?

[Dave]

Well, I went to there website and downloaded all the manuals and the loader files as well as the GUI interface. I have spent all of today trying to get the darn thing to be able to bootload a program. I am trying to use USART1 like normal but no go. I hooked a scope to the TX and RX pins and I did see a character or two returned from the pic 1 time only. I can see the pinging from the pc side but no responces from the pic side. I read a couple of forums and some people have had some success with the USART2 port. I was going to try that next. I have gone over all the spec's for the part and set all the registers to enable the first and second USART ports. I'm at my wit's end... like I said in my request post, I have talked to David Barker, the writer of MicroCode Studio and he has no plans on updating the MicroCode Loader for now. I would think that if you have a product that everybody uses you would support it. I kind of wish Mel Labs would support a bootloader once again. I use it for all my projects from bench to finish products... BTW, I compiled the same program without the asm lines to remap the bootloader location and used MPLAB to load it onto the 18F26K22 and the ports work just fine and as expected.

[HenrikOlsson]

Hi Dave,
I'm basically in the same boat, I use a bootloader for almost everything where an USART is available, it's just so convenient. Regarding Mecanique, I use MCSP and MCLoader all the time but I'm concidering the product dead - it is what it is and it what's avaialble now is what we'll get.

I seem to remember there was something wrong/weird with the settings for the 25K22, perhaps the same thing applies to the 26K22. I don't remeber exactly where I found the information but here are a couple of links, perhaps you've seen them both, perhaps you haven't.
http://digital-diy.com/forum/chit-ch...ader-t666.html
http://digital-diy.com/forum/amicus-...der-t1300.html

There's also a sample PBP program on the DS30 loader download page.

I placed an Digikey order yesterday, if I'd knew I would include a 26K22....

Good luck and please keep us updated!

/Henrik.

[Dave]

In fact Hendrik, The settings.inc file is from an 18F25K22 that was modified. Virtually the same. I am going to try the USART2 port this afternoon and see if it works... I'll keep in touch...

[timmers]

Regarding using 2 serial ports, I have had great success running two ports at different speeds using the 18F26K22. Sample coding below.

Tim.

INCLUDE "DT_INTS-18.bas"         ; Base Interrupt System
INCLUDE "ReEnterPBP-18.bas"     ; Include if using PBP interrupts
ASM
INT_LIST  macro    ; IntSource,        Label,  Type, ResetFlag?
        INT_Handler    RX1_INT,  _SERIALIN1,   PBP,  no
        INT_Handler    RX2_INT,  _SERIALIN2,   PBP,  no
        INT_Handler    TMR1_INT, _COUNTER,     PBP,  yes
    endm
    INT_CREATE                   ; Creates the interrupt processor
ENDASM

            RCSTA1 = %11010000                    ' Enable 9bit serial port & continuous receive
            TXSTA1 = %01100100                    ' Enable transmit, BRGH = 1
            BAUDCON1.3 = 1                         ' Enable 16 bit baudrate generator
            SPBRGH1 = 0
            SPBRG1 = B562500                    ' 562500 Baud
            
            RCSTA2 = %10010000                    ' Enable serial port & continuous receive & parity
            TXSTA2 = %00100100                    ' Enable transmit, BRGH = 1
            BAUDCON2.3 = 1                         ' Enable 16 bit baudrate generator
            SPBRGH2 = 1
            SPBRG2 = B38400                        ' 38400 Baud @ 54MHZ