RM46L852: N2HET1 and I2C port assignment

Hello,

1. RM46 has one I2C module, so you can use this I2C module instead of NHET emulated I2C. N2HET1[27] is pinmuxed with I2C SDA, and N2HET1[29] is muxed with I2C_SCL.

2. You can use N2HET to emulate I2C if you need 2nd I2C in your application. RM46 has 2 N2HET modules, so you can use N2HET1 for signal capture, and use N2HET2 for I2C. It is a challenge to combine two programs into one N2HET RAM, because you have to adjust the LRP to meet the requirments for both programs.

Hi All,

I am using available I2C module in RM46. This  I2C pin is shared with N2HET_27 and N2HET29.  I have configured this pin for I2C.

Apart from this 2 pins all other pins are used as N2HET input .In single program i need to configure both N2HET and I2C functionality. Manually, i need to modify thr HETREG1DIR and other pins. My question towards the register handling. I never emulating N2HET as I2C port.

Regards

S.Saravanakumar

If you don't use N2HET1[27] and N2HET1[29] in your N2HET code, executing N2HET code should not affect I2C. 

Hi All,

Currently, N2HET1 code is affecting the I2C code.

My question, by means of invoking the OR functionality with certain registers, we can eliminate this problem.

I want to know that, which are the registers needs to be taken care.

Regards

S.Saravanakumar

Hello,

What does "OR functionality" mean? This issue is caused by your code or your configuration. 

hi All,
Below are the example,
//HET
yyyDIR = 0x00000050

//I2C
yyyDIR = 0x00000100

yyyDIR = yyyDIR | 0x00000100

yyyDIR = 0x00000150

Since, the common registers port assignment needs to be taken care inorder to avoid the port violation.
Then,we can use use HET1 as well as I2C. Currently, i am not aware, which are the common registers needs to be taken care.
Kindly give your valuable feedback.
Thank you.

Regards,
S.Saravanakumar