Continuous TX with BLE GFSK

Hi,

Which service pack are you using and which wiki are you referring to? Is BLE GFSK the first modulation you are testing before others?

When I talk about wiki I am talking about thist site :http://processors.wiki.ti.com/index.php/CC256x_Testing_Guide

I am using v2.8 that can be found on your wiki. BLE GFSK is currently the first modulation that I am testing but this thing might change.

Juha,

Are you using the CC256x BHET tool to test this?

Regards,

Miguel

Juha,

Furthermore, could you provide an screen shot of the spectrum? Also, could you provide a log of the HCI commands and events that are sent?

Regards,

Miguel

I have an own application to test this. I will send you wireless spectrum and commands tomorrow. Anyway there is nothing to see because you can't see there any peaks produced cc256x.

My program works like this:
- First download patch and initialize SSO stack
- Then i send following command:
0xFD84 with payload 0x4, 0x0, 0x0, 0x15, 0x00000000, 0x00000000

If 0x04 is for example 0x01 this works perfectly. I have also tried to send following commands after 0xfd84, but it won't help. What do they by the way do?

HCI_VS_Write_Hardware_Register 0xFF01, 0x0019180c, 0x0101

HCI_VS_DRPb_Enable_RF_Calibration 0xFD80, 0xFF, 0xFFFFFFFF, 0x01

Hi Juha,

Here is a trace from the BHET: http://processors.wiki.ti.com/index.php/CC256x_Bluetooth_Hardware_Evaluation_Tool

CONTINUOUS TX:
 ModulationScheme:0x04(BLE)
 TestPattern:0x00(PN9 (Pseudo-Random))
 FrequencyChannel:0x26(38 (2440 MHz))
 PowerLevel:0x0F
Sent: 0x01, 0x84, 0xFD, 0x0C, 0x04, 0x00, 0x13, 0x0F, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,

Returned: 0x04, 0x0E, 0x04, 0x01, 0x84, 0xFD, 0x00,

Sent: 0x01, 0x01, 0xFF, 0x06, 0x0C, 0x18, 0x19, 0x00, 0x01, 0x01,

Returned: 0x04, 0x0E, 0x04, 0x01, 0x01, 0xFF, 0x00,

Sent: 0x01, 0x80, 0xFD, 0x06, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0x01,

Returned: 0x04, 0x0E, 0x04, 0x01, 0x80, 0xFD, 0x00,

And screenshot:

Here is trace from spectrum alanyzer when frequency is 2480 Mhz. I can send you my ellisys trace by email.

Hello Juha,

It looks like you are intiating other BT operations during the SSO stack initialization. Could you skip this step in your procedure and see if it makes a difference?

Rgds,

Miguel

I removed all unnecessary stuff from initializing function but the result is still same. I call just BSC_Initialize-function and change uart baudrate before sending these continuous tx commands. All the other modulations work perfectly, but I can not see anything with BLE_GFSK. HCI output is completly same as in your example.