28 lines
947 B
Markdown
28 lines
947 B
Markdown
### Check I2C Communication
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To check if the system can communicate with the I2C device, we should first scan the I2C bus to see if we can detect the device.
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1. Install the Linux i2c tools.
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```
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$ sudo apt-get install i2c-tools
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```
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2. Use **i2cdetect** tool to scan I2C Bus 1.
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```
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root@helios64:~# i2cdetect -y 1
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0 1 2 3 4 5 6 7 8 9 a b c d e f
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00: -- -- -- -- -- -- -- -- -- -- -- -- --
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10: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
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20: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
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30: -- -- -- -- -- -- -- -- -- -- -- -- 3c -- -- --
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40: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
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50: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
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60: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
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70: -- -- -- -- -- -- -- --
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```
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Here we can see there is a device detected at the address 0x3c. We can conclude is our OLED screen, unless you have connected more than just one I2C device on the **J9** header.
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