topic Re: CAN ANY POST I2C1 CODE FOR MKL25Z PLEASE in Kinetis Microcontrollers

CAN ANY POST I2C1 CODE FOR MKL25Z PLEASE

sreenathreddy — Sat, 28 Mar 2015 14:16:35 GMT

hi,

i am trying code for i2c since 5 days for mkl25z ,

doubt 1: after transmitting slave address , i need to check whether ack is receiving or not.so which flag i have to poll.

doubt 2: after stop enable my rxak bit is clearing,says that ack is received why ?

Original Attachment has been moved to: main.c.zip

Re: CAN ANY POST I2C1 CODE FOR MKL25Z PLEASE

mjbcswitzerland — Sun, 29 Mar 2015 22:13:23 GMT

>>doubt 1: after transmitting slave address , i need to check whether ack is receiving or not.so which flag i have to poll.

I2C Status register (I2Cx_S)

However you don't poll it - you poll IICIF and then check whether the slave acknowledged or not.

>>doubt 2: after stop enable my rxak bit is clearing,says that ack is received why ?

When sending a stop condition there is no more slave activity and the state of the RXACK flag is not of importance.

Regards

Mark

Kinetis: µTasker Kinetis support

KL25: µTasker Kinetis FRDM-KL25Z support / µTasker Kinetis TWR-KL25Z48M support

For the complete "out-of-the-box" Kinetis experience and faster time to market

Re: CAN ANY POST I2C1 CODE FOR MKL25Z PLEASE

sreenathreddy — Mon, 30 Mar 2015 03:57:05 GMT

i am not using interrupts , so now i have to check whether slave ack or not

Re: CAN ANY POST I2C1 CODE FOR MKL25Z PLEASE

Kan_Li — Mon, 30 Mar 2015 06:24:06 GMT

Hi Sreenath Reddy,

We provide I2C sample code for master and slave mode based on FRDM-KL05Z, please kindly refer to FRDM-KL05Z Sample Code Package for details.

Hope that helps,

Have a great day,
Kan

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Re: CAN ANY POST I2C1 CODE FOR MKL25Z PLEASE

sreenathreddy — Mon, 30 Mar 2015 12:27:34 GMT

In the sample code ,though interrupt is not enabled, you are polling IICIF

Re: CAN ANY POST I2C1 CODE FOR MKL25Z PLEASE

mjbcswitzerland — Mon, 30 Mar 2015 16:08:11 GMT

Whether using interrupts or not the interrupt flag still needs to be used to know when a byte transfer has completed and the slave acknowledge bit is ready to be read.

Regards

Mark

Kinetis: µTasker Kinetis support

KL25: µTasker Kinetis FRDM-KL25Z support / µTasker Kinetis TWR-KL25Z48M support

For the complete "out-of-the-box" Kinetis experience and faster time to market