pyboard 1.1, sd card, and ENODEV error

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rhubarbdog
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Re: pyboard 1.1, sd card, and ENODEV error

Post by rhubarbdog » Wed Mar 13, 2019 7:38 pm

ENODEV is correct for no SCL wire. Was it reporting an acceptable line number?
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hybotics
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Re: pyboard 1.1, sd card, and ENODEV error

Post by hybotics » Wed Mar 13, 2019 7:51 pm

rhubarbdog wrote: ↑
Wed Mar 13, 2019 7:38 pm
 ENODEV is correct for no SCL wire. Was it reporting an acceptable line number?
How is ENODEV the correct error for a missing SCL connection? I do not understand. It was reporting a correct error line, but I did not connect ENODEV with an I2C issue. I have learned something new.

8-Dale
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dhylands
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Re: pyboard 1.1, sd card, and ENODEV error

Post by dhylands » Thu Mar 14, 2019 1:29 am

The way I2C works is that it sends out a request to a device by manipulating SCL and SDA. If either signal were disconnected, then it looks the same as if the wires were connected but the device wasn't responding, or the device was disconnected.

Since no device was detected, ENODEV is returned.
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