WILINK-BT_WIFI-WIRELESS_TOOLS: HCITester problem

Buli Xu

Part Number: WILINK-BT_WIFI-WIRELESS_TOOLS

I have Ti Arago linux running on BBB and am able to control Element14 WL1837 BT communication via Ti Bluetopia, but could not make HCITester work with the same wilink cape by following hcitester user guide.

I am certain that BT_EN = 1. I've tried connecting and disconnecting BBB HCI lines to Wilink when using HCITester + USB/Serial calbe, but failed in both cases. TIInit_11.8.32.bts is the initialization BT script I used.

In other words, after verifying BT working conditions of BBB+Element14 WL1837 cape, I replace BBB HCI lines with 3.3V USB/serial lines, but still leave the rest connections (jump wires) from BBB to wilink. When executing BT initialization script .bts, HCITester always times out in the step of setting baud rate at the very beginning.
What am I missing?

Thanks,
Buli

over 7 years ago

0 Vihang Parmar over 7 years ago

TI__Mastermind 29250 points

Hi Buli,

The HCI UART lines of the WL18xx are at 1.8V logic level. You will need to use a 1.8V USB/serial cable.

Best regards,
Vihang

0 Buli Xu over 7 years ago in reply to Vihang Parmar

Intellectual 400 points

Vihang,

E14 WL1837 cape has onboard voltage level shifter (3.3v to 1.8V). Is that a problem?

Below is the screen capture of the error message. Baud rate has been changed to 115200.

0 Vihang Parmar over 7 years ago in reply to Buli Xu

TI__Mastermind 29250 points

Hi Buli,

There is clearly something wrong with the HW connection and/or the WL183x chip connection. Trying to run the same script as yours on the WL1837MODCOM8I+WL18XXCOM82SDMMC setup:

The Incoming Dump to the first command should be 04 0e 04 01 36 ff 00 as shown above. This data appears to be corrupted from your screenshot above.

Please contact E14 regarding review and test setup requirements on their cape.

Best regards,

Vihang

0 Buli Xu over 7 years ago in reply to Vihang Parmar

Intellectual 400 points

Vihang,

Thank you. It works now after disconnecting HCI lines with BBB.

0 Vihang Parmar over 7 years ago in reply to Buli Xu

TI__Mastermind 29250 points

Buli,

Thanks for posting the solution.

Best regards,
Vihang

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WILINK-BT_WIFI-WIRELESS_TOOLS: HCITester problem