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Re: [avrdude-dev] avrrftdi driver port selection
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From: |
Hannes Weisbach |
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Subject: |
Re: [avrdude-dev] avrrftdi driver port selection |
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Date: |
Fri, 17 Jan 2014 12:01:59 +0100 |
Am 17.01.2014 um 10:16 schrieb Jon Schneider <address@hidden>:
> Here is some output. I have 'scoped it. nRESET, MOSI, and SCK are being
> wiggled but I don't see anything on MISO.
Ok. You can use -b to set the frequency. The default is 150kHz,
which is usually unproblematic, but bad cabling may require a slower
connection. Give -b 10000 a try. Also use short cables and a low
inductance ground return.
How (fast) is the ATtiny clocked? Beware that the SPI-frequency must
be (well) below of 1/4 of the oscillator frequency.
Best regards,
Hannes