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Don't accept slave address >= 64 (DEC) somehow. #15

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EUA opened this issue Jan 26, 2019 · 2 comments
Closed

Don't accept slave address >= 64 (DEC) somehow. #15

EUA opened this issue Jan 26, 2019 · 2 comments

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@EUA
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EUA commented Jan 26, 2019 •
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For example:
Wire.begin(64);
makes device invisible to i2c scan.
but
Wire.begin(63);
is working perfect.
I don't know why...

twi.cpp : 713
if ( ( USIDR == 0 ) || ( ( USIDR >> 1 ) == slaveAddress) )
doesn't allow it somehow.
If I replace the line with
if(1)
than device seen at all addresses while i2c scan.

Please check it.
Thanks
@EUA
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EUA commented Jan 26, 2019

Looks like inherited bug from TinyWireS
rambo/TinyWire#41

@EUA
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EUA commented Jan 27, 2019

As I understand, quick scanning i2c bus for all address exhausting ATTiny even under using 16Mhz Internal OSC.

@EUA EUA closed this as completed Jan 27, 2019
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@EUA