slave not responding

RE: slave not responding

haakonsh — Fri, 13 Apr 2018 09:35:15 GMT

I need error codes or any other form of debug information

RE: slave not responding

Manoj Hiwarkar — Wed, 11 Apr 2018 12:24:13 GMT

at the tx or rx function. Not hard fault but similar like that. It stucks there.

RE: slave not responding

haakonsh — Wed, 11 Apr 2018 12:02:48 GMT

At what point do you get a hardfault?

RE: slave not responding

Manoj Hiwarkar — Wed, 11 Apr 2018 11:13:24 GMT

Our receive buffer array length is 11 bytes. So ,if i put 4 as length, then code will go to the hard fault handler.

RE: slave not responding

haakonsh — Wed, 11 Apr 2018 11:00:11 GMT

Have you tried using 4 as length parameter?

RE: slave not responding

Manoj Hiwarkar — Wed, 11 Apr 2018 10:53:19 GMT

We tried with sizeof operator also. Can you please upload the code. Because we have to resolve this urgently.

RE: slave not responding

haakonsh — Wed, 11 Apr 2018 10:46:57 GMT

ahh never mind, I see you follow Fig 4.(b) TYPICAL POINTER SET FOLLOWED BY IMMEDIATE READ FOR 2-BYTE REGISTER SUCH AS TEMPERATURE, TOS, AND THYST.

The only thing I can comment is that the length should be 4 and not 10.

RE: slave not responding

Manoj Hiwarkar — Wed, 11 Apr 2018 09:16:26 GMT

But we have sent the pointer byte in the code. Do you have the code for the same.If you have then can you please upload it. ?

RE: slave not responding

haakonsh — Wed, 11 Apr 2018 08:39:11 GMT

The videos are not really giving me any information, I suggest you get access to a digital analyzer like the Saleae Logic Pro 8/16. It will translate the TWI communication into an easily readable form.

Your packet format is wrong, you're missing the 'pointer' byte. See Figure 3.a in https://datasheets.maximintegrated.com/en/ds/MAX30205.pdf.

Also you should not assume that 'm_set_mode_done' is true after a completed TWI transfer, you should verify by reading back the register value before setting the m_set_mode_done flag. Although the TWI bus relies on ACKs from the slave, it does not verify that the slave has received and responded to the data in the way that you want it to, it only ACKs when a byte has been successfully received.

PS:
Thanks for sharing a project that compiles out of the box <3

RE: slave not responding

Manoj Hiwarkar — Wed, 11 Apr 2018 07:36:34 GMT

Dear sir,

I am trying to interface MAX 30205 with NRF52832. On thedevzone.nordicsemi.com/.../Video_5F00_2.mp4 oscilloscope I am getting the signals but still I am not getting the temperature data. Herewith I am have uploaded the video & codedevzone.nordicsemi.com/.../Smart-Temperature-Band.rar

Please tell me where I am going wrongdevzone.nordicsemi.com/.../Video_5F00_1.mp4

RE: slave not responding

jagannathan GOPALAKRISHNAN — Wed, 11 Apr 2018 07:21:44 GMT

yes sir

RE: slave not responding

haakonsh — Wed, 11 Apr 2018 07:08:23 GMT

Hey Jagannathan,

We're happy to help, but we need more information.

Cheers,

Håkon.