atmega1284p

maxneo · Joined: 07 Sep 2010 Posts: 35

I need a booloader for atmega1284p grateful for the help :D

(BASCOM-AVR version : 2.0.7.8 )

Paulvk · Joined: 28 Jul 2006 Posts: 1257 Location: SYDNEY

Hello maxneo

Have a look in bascom help and samples code for MCS bootloader

Regards Paul

maxneo · Joined: 07 Sep 2010 Posts: 35

I do not understand how to find the values of Atmega1284p can someone explain how to do it or is it the same as for ATMEGA128

below Atmega88

#if Downloader Chip = 88 'Mega88
$ loader = $ c00 "this address you can find in the datasheet
'The downloader address is the same as the boot vector address
Const Maxwordbit = 5
Config Com1 = Dummy, Synchron = 0, Parity = None, Stop bits = 1, Data bits = 8, Clockpol = 0
#endif

grateful for answers

maxneo · Joined: 07 Sep 2010 Posts: 35

Have tried to make a bootloader to atmega1284 but get error code

Error : 344 Line : 5 Program will overwrite bootloader [ 1640 too long] , in File : C:\PROGRAM FILES (X86)\MCS ELECTRONICS\BASCOM-AVR\LIB\FP_TRIG.LBX

$regfile = "m1284def.dat"
Const Loaderchip = 1284

if Loaderchip = 1284 ' Mega1284P
$loader = &H10000 ' 1024 words
Const Maxwordbit = 7 'Z7 is maximum bit '
Config Com1 = Dummy , Synchrone = 0 , Parity = None , Stopbits = 1 , Databits = 8 , Clockpol = 0
#endif

Is there anyone who can help me
Thank you in advance

bzijlstra · Posted: Tue Jan 13, 2015 10:43 pm Post subject:

There are a few things that can be done. First of all, could you show us the fusebit settings of your atmega1284p. Specially the reset-vector.

Do you have another atmega1284p with bootloader. I know this microcontroller is used on the Sanguinololu board. You could do a full copy and check the reset-vector settings. Reset-vector is pointing to 0000 or to the bootloader start location.

A bootloader will have all 'FF's till it is at the bootloader location, in your case 1024 words. This can be checked if you do a manual programming. You can check the buffer.

Don't worry, I am waiting for my Atmega1284p, and will put an Arduino bootloader in it.

Have fun
Ben Zijlstra

albertsm · Joined: 09 Apr 2004 Posts: 5925 Location: Holland

it is the same as for m128.
So just add this :

maxneo · Joined: 07 Sep 2010 Posts: 35

Many Thanks