I2C on SC13048

TinyCLR OS
1

Hi
I got my SC13048 board today. Flashed the latest Firmware.
Loaded the NuGet but get this error.

I have the GpIO and I2C NuGets.
Not sure what is wrong.
Without the I2C, the blinky works well

----Debug log—
Link failure: some assembly references cannot be resolved!!

Assembly: GHIElectronics.TinyCLR.Devices.I2c (2.1.0.0) needs assembly ‘GHIElectronics.TinyCLR.Devices.Gpio’ (2.1.0.0)

Error: a3000000

Waiting for debug commands…

2

the only thing I am sure of is you have a mismatch in your project between library versions and the version of firmware you have installed. Start a new project to make sure you’ve now got the correct/latest assemblies.

3

I would follow this step by step and only blink an led to start SITCore Start! – GHI Electronics

4

The blinky works fine.

As soon as I add the below as per your example, it fails

        var settings = new I2cConnectionSettings(0x40, 100_000); //The slave's address and the bus speed.
        var controller = I2cController.FromName(SC13048.I2cBus.I2c1);
        var device = controller.GetDevice(settings);-

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5

We make new project, look good to us

We tested on firmware 6500. But if you have 6400 or 6300 it should be fine.

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Start new project to see what happened. If new project work well then you may need clean nuget cache folder

6

One last note. I have seen cases where the device is confused!! Try erase all on TinyCLR config and then try again. Does this solve the issue?

7

If your project has package folder (VS2019), you need to delete them.
If your project doesn’t have package folder (VS2022), usually VS nuget cached here:

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8

ok…Thanks the erase all worked

I get an exception now when device.Write(…)
is it because the device is not connected? or something else

#### Exception System.Exception - CLR_E_TIMEOUT (1) ####
#### Message: 
#### GHIElectronics.TinyCLR.Devices.I2c.Provider.I2cControllerApiWrapper::WriteRead [IP: 0000] ####
#### GHIElectronics.TinyCLR.Devices.I2c.I2cDevice::WriteRead [IP: 0027] ####
#### GHIElectronics.TinyCLR.Devices.I2c.I2cDevice::Write [IP: 000c] ####
#### Sample.Program::Main [IP: 00b1] ####

Exception thrown: ‘System.Exception’ in GHIElectronics.TinyCLR.Devices.I2c.dll
An unhandled exception of type ‘System.Exception’ occurred in GHIElectronics.TinyCLR.Devices.I2c.dll

9

This is mysterious issue that we are still trying to find!

The address is wrong. No pull up resistors. The device is not connected…

10

Everything working now, Thanks

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