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baklou
Joined: 10 Jan 2014
Posts: 22
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| TinyBootloader issues with P18F46K80 |
 Posted: Fri Feb 14, 2014 1:25 am |
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Hello everybody,
I've already try the "TinyBootloader" solution with a 18F46K20 and I had been really satsified by it. But I have used a precompiled hex file for this microcontroller and I did'nt have no problem to use it so.
Now I'm trying to do the same with a 18F46K80 microcontroller, but I don't have the precompiled hex file. So I decided to modify and reuse an asm file given for a similar microcontroller, the 18F6621, because of its flash memory size (64k).
But just modifiying :
| Code: |
LIST P=18F46K80
xtal EQU 8000000
baud EQU 9600
delaytime EQU 2000000
#include <p18f46k80.inc>
IdTypePIC = 0x4B
#define max_flash 0x10000
#include "C:/Users/Greg/Documents/Projets MPLAB/try2.X/inc/spbrgselect.inc"
#define first_address max_flash-200
CONFIG XINST = OFF, FOSC = HS1, PLLCFG = OFF, WDTEN = OFF
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My microcontroller is clocked by an external quartz oscillator ( 8Mhz). I use mpasm 5.53 as compiler, and because of it, I must use "the Extended Instruction Set" fuse to off to disable it. Is it because of that my microcontroller doesn't respond to the software ? Because it's my problem, I don't have any answer from the microcontroller when I check PIC or even when I try to program it. My hardware RS232 serial communication works well, I've test it with an other code. So my problem comes from my "tiny" hex file, but I really don't know why. I don't really know asm language, that's why my knowledge is limited on this kind of problem. I also attach my full asm file if you want to check it completly.
If someone have any idea on how to fix my problem or where the problem is...
Thank you,
Greg
Here is the full code:
| Code: |
radix DEC
LIST P=18F46K80
xtal EQU 8000000
baud EQU 9600
delaytime EQU 2000000
;********************************************************************
; Tiny Bootloader 18F series Size=100words
; [email protected]
; http://www.etc.ugal.ro/cchiculita/software/picbootloader.htm
;********************************************************************
#include <p18f46k80.inc>
;IdTypePIC same as 18F6621 because of his flash memeory size (64k)
IdTypePIC = 0x4B
#define max_flash 0x10000
#include "C:/Users/Greg/Documents/Projets MPLAB/try2.X/inc/spbrgselect.inc" ; RoundResult and baud_rate
#define first_address max_flash-200 ;100 words
;CONFIG _CONFIG1H, _OSCS_OFF_1H & _OSC_HSPLL_1H
;CONFIG _CONFIG2L, _BOR_ON_2L & _BORV_20_2L & _PWRT_ON_2L
;CONFIG _CONFIG2H, _WDT_OFF_2H & _WDTPS_128_2H
;CONFIG _CONFIG4L, _STVR_ON_4L & _LVP_OFF_4L & _DEBUG_OFF_4L
CONFIG XINST = OFF, FOSC = HS1, PLLCFG = OFF, WDTEN = OFF
;----------------------------- PROGRAM ---------------------------------
cblock 0
crc
i
cnt1
cnt2
cnt3
counter_hi
counter_lo
flag
endc
cblock 10
buffer:64
dummy4crc
endc
SendL macro car
movlw car
movwf TXREG
endm
;0000000000000000000000000 RESET 00000000000000000000000000
ORG 0x0000
GOTO IntrareBootloader
;view with TabSize=4
;&&&&&&&&&&&&&&&&&&&&&&& START &&&&&&&&&&&&&&&&&&&&&&
;---------------------- Bootloader ----------------------
;PC_flash: C1h U H L x ... <64 bytes> ... crc
;PC_eeprom: C1h 40h EEADR EEDATA 0 crc
;PC_cfg C1h U OR 80h H L 1 byte crc
;PIC_response: type `K`
ORG first_address ;space to deposit first 4 instr. of user prog.
nop
nop
nop
nop
org first_address+8
IntrareBootloader
;init serial port
movlw b'00100100'
movwf TXSTA
movlw spbrg_value
movwf SPBRG
movlw b'10010000'
movwf RCSTA
;wait for computer
rcall Receive
sublw 0xC1 ;Expect C1h
bnz way_to_exit
SendL IdTypePIC ;send PIC type
MainLoop
SendL 'K' ; "-Everything OK, ready and waiting."
mainl
clrf crc
rcall Receive ;Upper
movwf TBLPTRU
movwf flag ;(for EEPROM and CFG cases)
rcall Receive ;Hi
movwf TBLPTRH
movwf EEADR ;(for EEPROM case)
rcall Receive ;Lo
movwf TBLPTRL
movwf EEDATA ;(for EEPROM case)
rcall Receive ;count
movwf i
incf i
lfsr FSR0, (buffer-1)
rcvoct ;read 64+1 bytes
movwf TABLAT ;prepare for cfg; => store byte before crc
rcall Receive
movwf PREINC0
decfsz i
bra rcvoct
tstfsz crc ;check crc
bra ziieroare
btfss flag,6 ;is EEPROM data?
bra noeeprom
movlw b'00000100' ;Setup eeprom
rcall Write
bra waitwre
noeeprom
btfss flag,7 ;is CFG data?
bra noconfig
tblwt* ;write TABLAT(byte before crc) to TBLPTR***
movlw b'11000100' ;Setup cfg
rcall Write
bra waitwre
noconfig
;write
eraseloop
movlw b'10010100' ; Setup erase
rcall Write
TBLRD*- ; point to adr-1
writebigloop
movlw 8 ; 8groups
movwf counter_hi
lfsr FSR0,buffer
writesloop
movlw 8 ; 8bytes = 4instr
movwf counter_lo
writebyte
movf POSTINC0,w ; put 1 byte
movwf TABLAT
tblwt+*
decfsz counter_lo
bra writebyte
movlw b'10000100' ; Setup writes
rcall Write
decfsz counter_hi
bra writesloop
waitwre
;btfsc EECON1,WR ;for eeprom writes (wait to finish write)
;bra waitwre ;no need: round trip time with PC bigger than 4ms
bcf EECON1,WREN ;disable writes
bra MainLoop
ziieroare ;CRC failed
SendL 'N'
bra mainl
;******** procedures ******************
Write
movwf EECON1
movlw 0x55
movwf EECON2
movlw 0xAA
movwf EECON2
bsf EECON1,WR ;WRITE
nop
;nop
return
Receive
movlw xtal/2000000+1 ; for 20MHz => 11 => 1second delay
movwf cnt1
rpt2
clrf cnt2
rpt3
clrf cnt3
rptc
btfss PIR1,RCIF ;test RX
bra notrcv
movf RCREG,w ;return read data in W
addwf crc,f ;compute crc
return
notrcv
decfsz cnt3
bra rptc
decfsz cnt2
bra rpt3
decfsz cnt1
bra rpt2
;timeout:
way_to_exit
bcf RCSTA, SPEN ; deactivate UART
bra first_address
;*************************************************************
; After reset
; Do not expect the memory to be zero,
; Do not expect registers to be initialised like in catalog.
END
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Ttelmah
Joined: 11 Mar 2010
Posts: 19538
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| Posted: Fri Feb 14, 2014 2:21 am |
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Hint,
_Wrong Forum_
This is a forum for 'CCS C'. Not for MPASM, or for Tiny Bootloader....
Ask in a forum for one of these..... |
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baklou
Joined: 10 Jan 2014
Posts: 22
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temtronic
Joined: 01 Jul 2010
Posts: 9243
Location: Greensville,Ontario
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| Posted: Fri Feb 14, 2014 8:22 am |
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Well, this is a C forum, not Assembler, so I understand Mr. T's comments.
One problem with that assembler code is that not every line is commented! That makes it very difficult for anyone to 'think' like the original programmer, in order to follow his way of coding. Odds are pretty good there's only a handful here who understand asm (though it's not that hard) and there are several bootloaders written in CCS C.
If you want to use that code, you'll have to wait for a reply from the author. He's the best bet.
Since you've gotten it to work with another PIC, I suggest you compare PICs and see what's different about them. Memory maps would be an obvious area, location of registers, etc. A 'side by side' comparision would be helpful.
Also, is your target PIC running? Could be a 'fuse' issue, so be sure the '1Hz LED' program runs before you try the bootloader!
hth
jay |
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baklou
Joined: 10 Jan 2014
Posts: 22
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| Posted: Mon Feb 17, 2014 1:51 am |
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Ok, I understand well what are you meaning. You're right about the "side by side" comparision and analysis.
My PIC is working well, I already check it.
Thank you for your answer.
Greg |
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