From: Dave H. <dhy...@gm...> - 2006-11-10 01:28:16
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Hi Chris, > Okay, I got ahold of a multimeter. There is no continuity between UARTS pins > 15 (gnd) and 16 (SCL). So, I connected pins 14 and 16; here is the result of > i2c-test: > > gumstix: SCL: 0 SDA: 1 > robostix: SCLw: 1 SCLr: 1 SDAw: 1 SDAr: 1 DDRD: 0 PIND: 3 So connecting pins 14 & 16 should have forced SCL high (which the robostix is reporting), but the gumstix is still seeing a 0. I'm assuming that if you connect 15 and 16, then the robostix will report SCLr: 0 That tell me its not the pullup resistor, but something with the hirose conenctor or the voltage conversion circuitry, or something on the gumstix itself. Do you have any other daughtercards? We could try connecting the SCL line on a breakout-gs or a waysmall to 3.3v and see if the i2c-test program on the gumstix detects it. -- Dave Hylands Vancouver, BC, Canada http://www.DaveHylands.com/ |