LAUNCHXL-CC26X2R1: ble5_host_test application is not responding to HCI commands

oldViking

Hi, I am trying to use the virtual com port to communicate with my host test app via the HCI protocol.

My java test app, running on my PC, has the serial port configured for 115200 baud, 1 start bit, 1 stop bit, and no flow control. The java test app tries to detect the presence of a CC26X2R1 on each of the virtual com ports that it finds.

This is the command that the java test app is transmitting on a serial port:

byte[] GapScan_disable = { 0x01, 0x52, (byte)0xFE };

I chose to use this command since it is very simple. It has no input parameters, and it should still respond with a CommandStatus Event packet.

While the java test app is trying each of the com ports, I have monitored the TX signal with an oscilloscope. The UART decode on my scope shows the exact data given in the GapScan_disable command above. There are no framing errors, and the signal looks clean.

My command has the packet header of 0x01, and the opcode of 0xFE52. The packet is constructed using little endian.

After many attempts, I am still getting no response from any of my testing.

Is there something I am doing wrong ?

Thank you

Roy

over 6 years ago

0 J Lindh over 6 years ago

TI__Guru 57865 points

Hi Roy,
Did you try BTool or Device Monitor for comparison and further narrow down the issue?

0 oldViking over 6 years ago in reply to J Lindh

Expert 1160 points

Hi Joakim,

I tried BTOOL with my Host Test. It worked very well. It scanned, connected and read attributes.

Is there a test point on the CC26X2R1 where I could connect my scope and look at the RX packet ?

Thank you

Roy

0 J Lindh over 6 years ago in reply to oldViking

TI__Guru 57865 points

Hi Roy,
The UART lines are exposed on the header separating the Launchpad Debugger chip. You should be able to probe there. Please share any findings so we can try to help you further.

0 oldViking over 6 years ago in reply to J Lindh

Expert 1160 points

Hi Joakim,

Thanks for the information. I will try this Tuesday morning after the holiday.

Roy

0 oldViking over 6 years ago in reply to oldViking

Expert 1160 points

Hi Joakim,

I got my scope on a pin labeled "DIO2_RXD"

I can see my GapScan_disable command on this pin. It looks perfect.

During my debug session I did get at least one response from this command. The first byte of this response packet is 0x04. This indicates that it is a CommandStatus Event.

So this is good. I now have something to work with.

Thank you for your help.

Roy

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LAUNCHXL-CC26X2R1: ble5_host_test application is not responding to HCI commands