CC2642R-Q1: External GPIO Clock (32768Hz)

Hello Jasper, 

Can you please describe what you are trying to do with a little more depth? I believe you are wanting to use an external LF clock for the clock of the device? 

If so, in SysConfig, under Device Configuration-> LF Clock Source, you can select the LF clock for 'External LF Clock'. This will allow you to select DIO and RTC increment. 

Let me know if this isn't what you are looking for. 

Thanks, 

Isaac

Good morning,

Unfortunately I cannot set a device configuration because of the bootloader.
I get the following. Can you help me to have the right defines to set the LF clock?

Hello Jasper, 

For your situation, you are using a LF clock, not a LF crystal is that correct?  Additionally, what SDK version are you using, and are you using an example project to build your desired project? 

Correct me if I am wrong here. You want to use the bootloader for this project, but you cannot set an external input for a LF clock source while within the bootloader? Do you need the external LF clock for the bootloader, or could you boot with the chip LF/HF oscillator, then switch the to external LF clock source? 

Let me know. 

Thanks, 

Isaac

Hello Isaac,

I use simple peripheral with OAD/BIM and simple serial socket. (UART over Bluetooth) I am using SDK version 7.40.
Because of the accuracy and small PCB, I do not use an LF crystal and only an LF clock.
I will try another project without BIM and see what the settings for an LF clock are there. Then I can possibly copy this into the ccgf.c

Hello Jasper, 

I am still looking into your question, and I have a few additional follow up questions. 

1. Is the LF clock the only external clock/crystal on the PCB? 

2. Can you use the internal RC oscillators on the CC2642 during the bootloader stage, then switch to the external clock source? 

3. When are you entering the bootloader stage? Is the project going to be receiving OAD updates frequently? 

Let me know!

Thanks, 
Isaac