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by unclouded
Fri Jun 27, 2014 8:33 am
Forum: Other projects
Topic: R-pi + main components 3D-model SolidWorks and IGES
Replies: 18
Views: 10203

Re: R-pi + main components 3D-model SolidWorks and IGES

If anyone wants an OpenSCAD model to start from then I've posted one at this link:
by unclouded
Wed Jun 12, 2013 10:40 am
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: I2C clock stretching
Replies: 69
Views: 67678

Re: I2C clock stretching

I've been using an ATtiny85 and an ATtiny861, neither of which have real TWI support but instead they have a "USI" that provides some hardware support for what is a software I2C implementation. These devices can: Disable clock stretching altogether by not driving SCL ( by leaving the appropriate bit...
by unclouded
Sat Jun 08, 2013 7:03 am
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: I2C clock stretching
Replies: 69
Views: 67678

Re: I2C clock stretching

I think this is affecting me too. The slave is a half-software, half-hardware I2C implementation using the USI on an ATtiny861. The ATtiny861 is clocked using the internal RC oscillator at 8 MHz. It seems to make no difference whether it sleeps in IDLE mode or not in the main loop. A single-byte rea...

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