RTOS/CC2640R2F: RTOS/CC2640R2F

Hi David,

Are you able to reproduce the issue on a unmodified OAD project where the RTC is reset after an OAD reboot?

You should only need to call Seconds_set() when you are receiving a time sync from an external time source such as NTP or a user manually keying in the time on your device. Otherwise, you should be able use Seconds_getTime() through a reset.

Additionally, for your information both watchdog timeouts and OAD resets will trigger a system reset with cause SYSRESET. This is because warm resets (what the watchdog triggers) are mapped to emulated pin resets by the boot code.

Hi Sean,

First of all, thank you very much for your reply.

Second of all, below is how I reproduced the RTC reset issue after an OAD reboot.
1. Import the simple_peripheral_cc2640r2lp_oad_offchip examples including bim, stack and app from simplelink_cc2640r2_sdk_1_50_00_58.
2. make a minor change in order to get/set RTC through a command line by using gatttool. The diff is attached below.
3. build and load the simple_peripheral_cc2640r2lp_oad_offchip_app_FlashROM_oad_merged.bin and bim_oad_offchip_cc2640r2lp_app.hex to LaunchPad CC2640R2F
4. connect to the lp by using the command below and do the reset of the test.

4.1 connect to lp,
$ gatttool -b B0:91:22:69:F6:E8 -I
[B0:91:22:69:F6:E8][LE]> connect
Connection successful

4.2 show handlers
[B0:91:22:69:F6:E8][LE]> char-desc
... ...
handle: 0x0021, uuid: 0000fff1-0000-1000-8000-00805f9b34fb
... ...
handle: 0x0027, uuid: 0000fff3-0000-1000-8000-00805f9b34fb
... ...

4.3 get the current timestamp from RTC, and showing it is increasing every second,
[B0:91:22:69:F6:E8][LE]> char-read-hnd 0x0021
Characteristic value/descriptor: 87 43 6d 38
[B0:91:22:69:F6:E8][LE]> char-read-hnd 0x0021
Characteristic value/descriptor: 88 43 6d 38

4.4 change the timestamp to a different value, and showing the timestamp keep increasing every second after the change
[B0:91:22:69:F6:E8][LE]> char-write-cmd 0x0021 00112233
[B0:91:22:69:F6:E8][LE]> char-read-hnd 0x0021
Characteristic value/descriptor: 01 11 22 33
[B0:91:22:69:F6:E8][LE]> char-read-hnd 0x0021
Characteristic value/descriptor: 02 11 22 33
[B0:91:22:69:F6:E8][LE]> char-read-hnd 0x0021
Characteristic value/descriptor: 03 11 22 33
[B0:91:22:69:F6:E8][LE]> char-read-hnd 0x0021
Characteristic value/descriptor: 04 11 22 33
... ...
4.5 simulate the OAD reboot by calling the HAL_SYSTEM_RESET();
[B0:91:22:69:F6:E8][LE]> char-write-cmd 0x0027 11
[B0:91:22:69:F6:E8][LE]>
(gatttool:2738): GLib-WARNING **: Invalid file descriptor.

4.6 reconnect back after a reboot,
[B0:91:22:69:F6:E8][LE]> connect
Attempting to connect to B0:91:22:69:F6:E8
Connection successful

4.7 check the timestamp from RTC, and found the timestamp reset.
[B0:91:22:69:F6:E8][LE]> char-read-hnd 0x0021
Characteristic value/descriptor: 84 43 6d 38
[B0:91:22:69:F6:E8][LE]> char-read-hnd 0x0021
Characteristic value/descriptor: 86 43 6d 38

The LaunchPad is powered on during the entire testing. Please let me know how I can make the RTC work properly.

Thanks in advance,
David

======= Below is the diff from the original simple_peripheral_cc2640r2lp_oad_offchip example =======
$ diff cc2640_r2_csdk.cfg cc2640_r2_csdk-after.cfg
160c160,161
<
---
> var Seconds = xdc.useModule('ti.sysbios.hal.Seconds');
>
$ diff simple_gatt_profile.c simple_gatt_profile-after.c
58a59,61
> #include <ti/sysbios/hal/Seconds.h>
> #include <ti/sysbios/interfaces/ISeconds.h>
> #include "hal_mcu.h"
613,614c616,623
< *pLen = 1;
< pValue[0] = *pAttr->pValue;
---
> *pLen = 4;
> // pValue[0] = *pAttr->pValue;
> uint32_t sec;
> ISeconds_Time ts;
> Seconds_getTime(&ts);
> sec = ts.secs + 946684800;
> VOID memcpy( pValue, &sec, 4 );
>
668d676
< case SIMPLEPROFILE_CHAR3_UUID:
674c682,683
< if ( len != 1 )
---
> // if ( len != 1 )
> if ( len != 4 )
687,697c696,709
< uint8 *pCurValue = (uint8 *)pAttr->pValue;
< *pCurValue = pValue[0];
<
< if( pAttr->pValue == &simpleProfileChar1 )
< {
< notifyApp = SIMPLEPROFILE_CHAR1;
< }
< else
< {
< notifyApp = SIMPLEPROFILE_CHAR3;
< }
---
> // uint8 *pCurValue = (uint8 *)pAttr->pValue;
> // *pCurValue = pValue[0];
> //
> // if( pAttr->pValue == &simpleProfileChar1 )
> // {
> // notifyApp = SIMPLEPROFILE_CHAR1;
> // }
> // else
> // {
> // notifyApp = SIMPLEPROFILE_CHAR3;
> // }
> uint32_t newTime;
> memcpy( &newTime, pValue, 4 );
> Seconds_set(newTime - 946684800); //sec between Jan 1st, 1970-2000
700a713,716
> case SIMPLEPROFILE_CHAR3_UUID:
> HAL_SYSTEM_RESET();
>
> break;