BQ79616EVM-021: Teensy 4.1 microcontroller - The IC is in wakeup state but unable to receive data

Benjamin, 

I have tried the suggested method by declaring the device as both base and top of stack, but still I am not getting any response. Additionally, I also tried by performing single device read/write by taking the default address i.e., 0x00. Please find attached below the software reference and also the data I tried to send observed at the RX pin of the evaluation board. 

Please suggest me some other method as I currently dont have an access to a logic analyzer. 

Priyangsi,

I noticed the synchronization commands go to 0x34B when they should stop at 0x34A and that you are auto-addressing to three devices but you seem to also indicate there is only one device in the stack.

Can you have the program print all of the commands that you send to the EVM? Double check that the baud rate and serial protocol are as indicated on the datasheet:

Additionally, could you check that the TX pin of the EVM actually shows no sign of response? 

Finally, you can find our reference code here. 

Regards,

Ben

Benjamin, 

I am now using only a single device and I am trying to enable the TSREF output, but I am still getting 0V at the TSREF pin of the evaluation board. I am waking up the IC and then running the command to activate TSREF. Am I missing any steps in between? 

Also, PFA the code and let me know if there is any problem in this.
This code is written in Arduino.

https://e2e.ti.com/cfs-file/__key/communityserver-discussions-components-files/196/Arduino_5F00_Sample_5F00_code.ino

Regards,

Priyangsi

Benjamin, 

Additionally I have attached the updated code by implementing the changes suggested by you. The output remains same i.e., no response from the IC. 
Also, at the TX pin of the IC the voltage is a constant high(4.5V). 

I also wanted to make sure if we are using a single device is it actually necessary to run these steps (Auto addressing, Syncing DLL loops, Resetting faults).

https://e2e.ti.com/cfs-file/__key/communityserver-discussions-components-files/196/Arduino_5F00_Code.ino

Are the below steps necessary for a single device? 

Regards, 
Priyangsi

Benjamin,

Sorry for the delay. The PARTID was returned correctly after going through the logic analyzer. We were missing the delay while syncing the delay locked loops. Additionally now we are trying to read the cell voltages using the resistor ladder on the Evaluation Board but are not getting the desired response. I am reading the high and low registers of the 16th Cell. Ideally, it should give me the BAT voltage i.e, 24V , but it gives it to be around 12V. Please find the attached code. 
https://e2e.ti.com/cfs-file/__key/communityserver-discussions-components-files/196/sketch_5F00_oct16a.ino

In this I am printing the value of the registers and then applying 2s complement and then multiplying by the ADC resolution (190.73uV/LSB). This process I am performing manually. Is there any thing I am missing in the code?. Also if there is anything wrong in the process I am doing manually please let me know. 

Again thnx, for resolving the previous issue.