[PIC] Bootloader for USB enabled PIC18F47J53

[Jim Ruxton]

Hi,

I am trying to find a USB  bootloader I can work with for the USB
enabled PIC18F47J53 . I found a free bootloader that Microchip supplies
via their Microchip Libraries for Applications. In their v_2016_11_07
version of this library they supply a bootloader for this chip. My
problem is I can't get it to compile with the free version of XC8. I get
errors like


:0:: error: (1347) can't find 0xF2 words (0xf2 withtotal) for psect
"text13" in class "CODE" (largest unused contiguous range 0xCA)
Non line specific message::: advisory: (1493) updated 32-bit
floating-point routines might trigger "can't find space" messages
appearing after updating to this release; consider using the smaller
24-bit floating-point types

Wondering if anyone has gotten this to compile with the free version of
XC8. Not sure that I want to upgrade just for the use of the bootloader.
Or can anyone else recommend a USB bootloader for this chip that may be
smaller? Would I be better off going with a UART design and an FTDI chip
or something similar. This will be my first project using a bootloader
so I am a bit in the dark here.

Thanks for any advice.

Jim

[Ruben Jönsson]

If the bootloader won't fit you have to change your linkerscript for the bootloader and allocate more memory for it. You also have to offset the memory location for the application accordingly.

/Ruben


Den Wed, 15 Aug 2018 03:23:01 -0400, Jim Ruxton skrev:

Hi,

I am trying to find a USB  bootloader I can work with for the USB
enabled PIC18F47J53 . I found a free bootloader that Microchip supplies
via their Microchip Libraries for Applications. In their v_2016_11_07
version of this library they supply a bootloader for this chip. My
problem is I can't get it to compile with the free version of XC8. I get
errors like


:0:: error: (1347) can't find 0xF2 words (0xf2 withtotal) for psect
"text13" in class "CODE" (largest unused contiguous range 0xCA)
Non line specific message::: advisory: (1493) updated 32-bit
floating-point routines might trigger "can't find space" messages
appearing after updating to this release; consider using the smaller
24-bit floating-point types

Wondering if anyone has gotten this to compile with the free version of
XC8. Not sure that I want to upgrade just for the use of the bootloader.
Or can anyone else recommend a USB bootloader for this chip that may be
smaller? Would I be better off going with a UART design and an FTDI chip
or something similar. This will be my first project using a bootloader
so I am a bit in the dark here.

Thanks for any advice.

Jim

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[Jim Ruxton]

Thanks a lot. I changed the memory boundaries in the linker and it is
compiling now.
Jim

Post by Ruben Jönsson
If the bootloader won't fit you have to change your linkerscript for the
bootloader and allocate more memory for it. You also have to offset the
memory location for the application accordingly.
/Ruben
Hi,
I am trying to find a USB  bootloader I can work with for the USB
enabled PIC18F47J53 . I found a free bootloader that Microchip supplies
via their Microchip Libraries for Applications. In their v_2016_11_07
version of this library they supply a bootloader for this chip. My
problem is I can't get it to compile with the free version of XC8. I get
errors like
:0:: error: (1347) can't find 0xF2 words (0xf2 withtotal) for psect
"text13" in class "CODE" (largest unused contiguous range 0xCA)
Non line specific message::: advisory: (1493) updated 32-bit
floating-point routines might trigger "can't find space" messages
appearing after updating to this release; consider using the smaller
24-bit floating-point types
Wondering if anyone has gotten this to compile with the free version of
XC8. Not sure that I want to upgrade just for the use of the bootloader.
Or can anyone else recommend a USB bootloader for this chip that may be
smaller? Would I be better off going with a UART design and an FTDI chip
or something similar. This will be my first project using a bootloader
so I am a bit in the dark here.
Thanks for any advice.
Jim
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http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive
View/change your membership options at
http://mailman.mit.edu/mailman/listinfo/piclist
 
--
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View/change your membership options at
http://mailman.mit.edu/mailman/listinfo/piclist