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johanvdb
Joined: 17 Aug 2004
Posts: 5
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 Posted: Tue Aug 17, 2004 11:13 am Post subject: ATiny15 problems ... |
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Hi,
I'm able to compile a simple piece of code (LED flasher) for the ATiny15 and I can program the MCU from out of BASCOM. However, the code does not run. I can also verify the code from out of the programmer, so that is fine. When I download the code to another MCU (8535) it works fine. I do however use the header as in the atiny15 sample provided with BASCOM (which I don't use when taretting the 8535 however).
Can it be that there is something wrong with the ATiny15? Maybe I need to define the internal clock speed using the OSCAL register (0xff for max speed). It is a 15LS, maybe I need to run on 3V instead of 5V?
I'm not sure ... anybody an idea on what the problem can be?
Thanks!
Johan |
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DJD XTREEM
Joined: 24 Jun 2004
Posts: 190
Location: 127.0.0.1
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| Posted: Wed Aug 18, 2004 10:07 am Post subject: |
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Please post the code you use..
Because the smaller AVR procs have some problems with some of the statements off bascom..
_________________
Bascom AVR 1.11.8.8 full version
STK500 Programmer
ISP Programmer |
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johanvdb
Joined: 17 Aug 2004
Posts: 5
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| Posted: Thu Aug 19, 2004 9:58 am Post subject: |
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Ok ... here's the code:
| Code: |
$tiny
$regfile = "at15def.dat"
$noramclear
config pinb.4 = output
main:
toggle portb.4
wait 1
goto main
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For the moment I reverted back to the 2343 ... but I would rather want to benefit from the new parts like the 15 or 12 ...
Johan[/code] |
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DJD XTREEM
Joined: 24 Jun 2004
Posts: 190
Location: 127.0.0.1
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| Posted: Thu Aug 19, 2004 10:32 am Post subject: |
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| johanvdb wrote: | Ok ... here's the code:
| Code: |
$tiny
$regfile = "at15def.dat"
$noramclear
config pinb.4 = output
main:
toggle portb.4
wait 1
goto main
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Well the code works fine for me on a 90s2343 at Internal Oscilator.
I did set the fusebit for internal oscilator and corrected the speed to 1mhz..
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Bascom AVR 1.11.8.8 full version
STK500 Programmer
ISP Programmer |
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johanvdb
Joined: 17 Aug 2004
Posts: 5
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| Posted: Thu Aug 19, 2004 11:10 am Post subject: |
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Indeed ... on 2343 everything is fine. I'm talking tiny15 here ...
Oh ... now you talk aboutthe 2343 internal RC osc. have you ever tried a software UART with it? I can't get it to send something correctly, probably the RC osc is way of 1Mhz 
Johan |
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DJD XTREEM
Joined: 24 Jun 2004
Posts: 190
Location: 127.0.0.1
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| Posted: Thu Aug 19, 2004 11:12 am Post subject: |
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Well as far i know the 2343 can't be used for serial comunication.. it doesn't have a uart.. And as i know off not even controll for a software uart..
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Bascom AVR 1.11.8.8 full version
STK500 Programmer
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johanvdb
Joined: 17 Aug 2004
Posts: 5
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| Posted: Thu Aug 19, 2004 12:16 pm Post subject: |
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Oh yes, you can:
[CODE]
$crystal = 1000000
config pinb.4 = output
open "COMB.3:2400,8,N,1" for output as #1
main:
toggle portb.4
print #1, "Hello World"
wait 1
goto main
[/CODE/]
The only problem seems to be the baudrate. A deviation from the clockspeed by 10% would mean a 10% deviation for the timings of the serial bitstream, that would hurt and definitely generate gibberish on the receiving terminal.
Has anybody experience setting up a software UART on a device with internal RC oscillator?
Johan |
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albertsm
Joined: 09 Apr 2004
Posts: 5319
Location: Holland
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| Posted: Tue Aug 31, 2004 10:23 pm Post subject: |
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Hi
In version 1.11.7.4 waitms uses SBIW that is not supported in the tiny15. In the next beta , other asm is ued so waitms will worik with the tiny15.
But tiny15 is best to be programmed with asm.
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