S32 SDKのトピックRe: s32k144 flexio_i2c read error

s32k144 flexio_i2c read error

Felix_Zhang — Fri, 21 Jun 2019 22:51:51 GMT

Dear ,

i use flexio_i2c_s32k144 demo code to test.

but find the read value is not matched with I2C wave.

What may be the reason? Thanks

danielmartynek — Mon, 24 Jun 2019 10:10:35 GMT

Hello.

Is the master reading only one byte or more?

What is the status returned by the receive function?

Could you please share the project?

If you don't want to post it here, you may create a ticket.

Thanks,

BR, Daniel

Felix_Zhang — Thu, 04 Jul 2019 01:39:19 GMT

Dear Daniel ,

Thanks very much for your reply.

In this code, the master reading only one byte, although the read funtion "mpu6050_read_reg()" can read more byte.

My project attached.

Please help check.

I really confused.

Thanks very much.https://pan.wps.cn/l/s0lcLKzIx [文件] flexio_i2c_test.zip

Felix_Zhang — Thu, 04 Jul 2019 01:40:42 GMT

danielmartynek — Wed, 10 Jul 2019 07:35:45 GMT

Hello,

Sorry for the delay and thanks for the project.

I don't see anything wrong in it though.

I will try to test it with a slave device on my side.

Do you have any update?

Thanks,

BR, Daniel

danielmartynek — Thu, 25 Jul 2019 12:04:33 GMT

I have tested your code with a slave device, I could reproduce the issue at 400kb/s.

It reads correct value at 100kb/s. Could you try decreasing the baud rate as well.

What pull-up resistors are you using?

Thanks,

BR, Daniel