Mc60 i2c fails - clock stretching

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1

Hi all,
I am interfacing BQ27441 Fuel guage Ic with QUECTEL MC60 using i2c, I am getting error “QL_RET_ERR_I2CHWFAILED” on using Ql_IIC_Read function. i have checked pull up as well they are fine.
I observed waveform of i2c lines on CRO and I think the problem is because of clock stretching. Can anyone tell me is there any way I can control clock stretching in QUECTEL MC60?

2

Hello, here are some suggestions:

  1. You can try to reduce the frequency of I2C to see if it can solve your problem.

  2. If downscaling does not solve your problem, you can increase the transmission voltage by level switching to reduce interference.

Hope my answer is helpful to you!