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Forum Index : Microcontroller and PC projects : i2c check not working ?

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DigitalDreams
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Joined: 03/05/2025
Location: United Kingdom
Posts: 24

Posted: 01:03pm 03 Jul 2025

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Very little info on this command in either version of the manual. Software 6.00002. When I try to use it with a known working i2c device...

i2c check 0x68
Error : pin not set for I2C

i2c check &h68
Error : pin not set for I2C

Info missing in the manual or typo ??
Edited 2025-07-03 23:04 by DigitalDreams

matherp
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Joined: 11/12/2012
Location: United Kingdom
Posts: 10277

Posted: 01:05pm 03 Jul 2025

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i2c2 check?

DigitalDreams
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Joined: 03/05/2025
Location: United Kingdom
Posts: 24

Posted: 01:22pm 03 Jul 2025

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matherp said i2c2 check?

No error but pin list returns...
GP6 9 System i2c SDA
GP7 10 System i2c SCL

And option list...
Option system i2c gp6 gp7 slow.

Hence I expected i2c not i2c2 ?!

matherp
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Joined: 11/12/2012
Location: United Kingdom
Posts: 10277

Posted: 01:26pm 03 Jul 2025

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System i2c uses i2c or i2c2 depending on the pins you specify. GP6, GP7 are I2C2. Normal I2C commands like CHECK require you to use the version corresponding to the pins i2c or i2c2 as both could be in use
Edited 2025-07-03 23:28 by matherp

DigitalDreams
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Joined: 03/05/2025
Location: United Kingdom
Posts: 24

Posted: 01:31pm 03 Jul 2025

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matherp said System i2c uses i2c or i2c2 depending on the pins you specify. GP6, GP7 are I2C2. Normal I2C commands like CHECK require you to use the version corresponding to the pins i2c or i2c2 as both could be in use

Ah a little confusing as the Pico2 pinout refers to i2c0 and i2c1....

matherp
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Joined: 11/12/2012
Location: United Kingdom
Posts: 10277

Posted: 01:44pm 03 Jul 2025

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MMbasic manual is your reference. The naming maintains compatibility with other MMbasic variants

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