topic Re: FRDM-KL46Z : question on I2C slave adress automatic detection method in Kinetis Microcontrollers

FRDM-KL46Z : question on I2C slave adress automatic detection method

r58737 — Wed, 18 Dec 2013 14:49:58 GMT

Hello,

I'm using a FRDM-KL46Z platform and I want to use I2C communication.

With processor expert , I set a I2C serial components as Master and I want to detect all the slave devices connected to this I2C bus.

I see a method named "I2Cx-SelectSlaveDevice(MyI2Cptr, LDD_I2C_ADDRTYPE_GENERAL_CALL,devAddr)".

Could someone give me an example on how to use this method to detect slave devices connected to the I2C bus.

I want to be able to select after this detection a device present on the bus and start communication.

Thanks

Philippe

BlackNight — Wed, 18 Dec 2013 15:07:02 GMT

Hi Philippe,

I'm scanning the I2C bus with a special I2C Processor Expert component (see CSI Crime Scene Investigation with I2CSpy and Freedom Board | MCU on Eclipse). Selecting the slave is not enough: you need to read/write to the device, as only then the bus is accessed.

I hope this helps,

Erich