Freqneucy band for CC1310

Baeyoung Park

Expert 1420 points

Other Parts Discussed in Thread: CC1310

Hi,

I am using CC1310 for my project.

Using CC1310DK, I fully tested my code based on EasyLink sample project, concentrator and node.

And then I moved to my hardware. My hardware is based on CC1310EMK. Actually there is no difference for 424.7MHz.

We are going to use 424.7MHz instead of 868MHz.

To send and receive, I am using EasyLink_transmit and EasyLink_receiveAsync.

But after EasyLink_receiveAsync is executed, CC1310 deadlocked and was not working.

Is there an any software modification for frequency change from 868 to 424.7MHz.

I just changed definition in RadioProtocol.h like the following

#define RADIO_FREQUENCY 424700000

I am sorry to say that this is urgent and important.

Thanks in advance.

Best regards,

Baeyoung

over 9 years ago

0 Baeyoung Park over 9 years ago

Expert 1420 points

I tested my code using 424.7MHz on CC1310DK. I have the same problem.
I think CC1310 doesn't support 424.7MHz.
Now I am using tirtos_cc13xx_cc26xx_2_16_01_14.
I need your help.
Best regards,
Baeyoung

0 TER over 9 years ago in reply to Baeyoung Park

TI__Guru**** 317180 points

Is your hardware made for 424.7 MHz? Or have you used the 868 MHz BOM?

0 Baeyoung Park over 9 years ago in reply to TER

Expert 1420 points

Hi TER,

I made the hardware for 424.7MHz. Please check the below link:

I am follwoing this document.

Do you mean that RF hardware can make CC1310 halted?

If you have good design for 4xxMHz, could you provide the design guide?

Thanks in advance.

Baeyoung

0 TER over 9 years ago in reply to Baeyoung Park

TI__Guru**** 317180 points

Try to replace the smartrf_settings_predefined.c. I suspect that the loDivider in rfc_CMD_PROP_RADIO_DIV_SETUP_t has to been set to support 433 MHz operation.

0 Baeyoung Park over 9 years ago in reply to TER

Expert 1420 points

Hi, TER,

I am little late for update.

How can I change the setting for rfc_CMD_PROP_RADIO_DIV_SETUP_t ?

I tried to find all issues related with 4xxMHz and I found there was no answer from TI.

I chaged from 0x05 to 0x0f for loDivider. CC1310 halted.

Could you provide smartrf_settings.c and smartrf_settings.h for 4xxMHz?

I need your support for this issue. Using 4xxMHz is critical to my project.

Thanks in advance.

Baeyoung

0 TER over 9 years ago in reply to Baeyoung Park

TI__Guru**** 317180 points

I have to do some tests in my end.

To understand what you are trying to do: You are using EasyLink_transmit and EasyLink_receiveAsync unmodified except for trying to change the frequency?

0 Baeyoung Park over 9 years ago in reply to TER

Expert 1420 points

Hi, TER,
Thanks for your update.
Yes, I want to use EasyLink for my wireless sensor and concentrator except using other frequency.
I want to use 4xxMHz frequency.
Baeyoung

0 TER over 9 years ago in reply to Baeyoung Park

TI__Guru**** 317180 points

I tested and got it to work.

You need to do the following changes in the code:

static void rfEasyLinkRxFnx(UArg arg0, UArg arg1)
{
.
.
EasyLink_setFrequency(424700000);

In smartrf_settings_predefined.c

rfc_CMD_PROP_RADIO_DIV_SETUP_t RF_cmdPropRadioDivSetup_50kbps2gfsk =
{
.
.
.centerFreq = 0x018A,
.
.loDivider = 0x0A,
};

The issue is that the EasyLink_setFrequency() function does not change the settings of CMD_PROP_RADIO_DIV_SETUP which causes an issue when the frequency difference between CMD_PROP_RADIO_DIV_SETUP and CMD_FS is large.

0 Baeyoung Park over 9 years ago in reply to TER

Expert 1420 points

Hi, TER,
Thanks for your help
Your recommendation cleared the problem.
Baeyoung

0 Jing Xia over 8 years ago in reply to TER

Expert 1440 points

Hi TER:

I am also using the EasyLink_setFrequency() to change the frequency and also encountering this problem.

I know that .centerFreq equals to the value of divSetup.centerFreq , but I don't know what's the rule I should to follow to change the .loDivider ?

0 TER over 8 years ago in reply to Jing Xia

TI__Guru**** 317180 points

The .loDivider setting is dependent on which frequency band you operate on. VCO frequency / loDivider gives the band. Use SmartRF Studio to find the value.

0 Jing Xia over 8 years ago in reply to TER

Expert 1440 points

Hi TER:
I am sorry but can you tell me what's VCO frequency?
If I want to use 433 band\868 band\902 band, How to set the IoDivider ?

0 TER over 8 years ago in reply to Jing Xia

TI__Guru**** 317180 points

Write in the wanted frequency in SmartRF Studio and it will give you the correct loDivider value.

Sub-1 GHz

Sub-1 GHz forum

Freqneucy band for CC1310