I'm currently trying to control a pwm generator through the I2C port. I get a problem with the start and stop condition of I2C, under Linux OS.
If I'm correctly understand tutorial , I should modify SDA and SCL port (as detailed in this tutorial : http://www.robot-electronics.co.uk/i2c-tutorial) for initiate a communication with the slave (pwm generator).
However, I'm not able to access the I2C port through gpio pin.
For example, this command : (with root user)
echo 498 > /sys/class/gpio/export
bash: echo: write error: Invalid argument
May I misunderstood something ?
Thanks by advance for your help.
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