CC1352P: HCI Command : UTIL_NVWrite : What flash address/sector does this command write?

Chander G

Part Number: CC1352P
Other Parts Discussed in Thread: SYSCONFIG

Hi,

My customer wants to save some calibration data in Flash of the device during production. The only interface available is using HCI command as the customer is running Host test application for production calibration of their modules.

I tried UTIL_NVRead / UTIL_NVWrite it seems to work fine.

Now after this, the customer has to reprogram the device with a different software (similar to Simple_Peripheral example). They want to retrieve above calibratio data without HCI usage. So the question is what flash address does UTIL_NVWrite command write?

Regards,

Chander

over 5 years ago

0 Eirik V over 5 years ago

TI__Guru 56590 points

Hello Chander,

UTIL_NVWrite use osal_snv_write with designated ID (provided in command I believe). This can be seen in the HostTest application file icall_hci_tl.c where

processExtMsgUTIL will catch the incoming UTIL_NVWrite call.

OSAL SNV is an wrapper on top of NVINTF (NV Driver):

http://dev.ti.com/tirex/explore/content/simplelink_cc13x2_26x2_sdk_4_10_00_78/docs/ble5stack/ble_user_guide/html/ble-stack-common/flash_memory-cc13x2_26x2.html?highlight=osal_snv_write#osal-simple-nv-osal-snv

Items written to the NV area is placed where there is room in the selected NV pages and therefore will not necessarily be placed at the same location each time (depending on current content and header). OSAL SNV is used by the BLE stack to store such as encryption keys from bonding,GATT Configuration, etc. There might be a way to end up with a deterministic location relative to the NVS region start (usually address 0x48000, defined in ti_drivers_config.c that is generated from sysconfig):

Complete chip flash is erased before programmed ( to clear any content in the NVS region ).
If they use UTIL_NVWrite right after reset (before any BLE activity that may cause further writes to osal snv).

I believe it must be profiled to verify I am right.

0 Chander G over 5 years ago in reply to Eirik V

TI__Intellectual 2420 points

Thanks Eirik for the detailed reply. I will check these functions and try to find out if I can change it to a deterministic location.

Regards,

Chander

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CC1352P: HCI Command : UTIL_NVWrite : What flash address/sector does this command write?