CPU keeps on rebooting

Legacy Legacy AirPrime modules
1

hi,
Iam reading GPS data from uart2,

This is my timer definition

adl_tmrSubscribe(FALSE,50,ADL_TMR_TYPE_100MS,(adl_tmrHandler_t)uart_function);

after 15-20 minutes the the CPU starts rebooting

+WIND: 3

+WIND: 13

+CREG: 0

+CGREG: 0
INSIDE MAIN FUNCTION STARTING THE TIMER

+WIND: 1

+CREG: 2
INSIDE UART INIT HANDLER

FLOW IS OPENED NOW
tuned uart2 to 9600
switching uart2 to data mode
RESPONSE from ipr
ALREADY IN DATA MODE
*7D
426,21,30,37,313,16*70

$GPRMC,093419.00,A,1300.23792,N,07739.55436,E,0.526,353.60,131109,,,A*65
$GPVTG,353.60,T,,M,0.526,N,0.975,K,A*34
$GPGGA,093419.00,1300.23792,N,07739.55436,E,1,08,1.30,919.6,M,-86.3,M,,*73
$GPGSA,A,3,04,15,30,27,12,05,02,10,,,,,1.78,1.30,1.21*0F
$GPGSV,4,1,14,01,32,317,,02,32,021,39,04,07,047,30,05,79,078,48*7D
$GPGSV,4,2,14,09,18,211,,10,68,059,48,12,72,289,33,15,18,168,21*73
$GPGSV,4,3,14,17,05,106,23,21,04,254,,24,35,282,29,27,16,204,23*7C
$GPGSV,4,4,14,29,10,316,21,30,37,313,16*70
$GPGLL,1300.23792,N,07739.55436,E,093419.00,A,A*6B

then after this it sends gps data say to 5 packets and again reboots. whether rebooting again and again reduces life of CPU? My gps module is connected to uart2. Please guide me.Why and when CPU reboots.

2

Rebooting does not reduce life of the CPU but there is a possiblity of NOT rebooting and therefore freezing the entire module if you do not have external watchdog.
Your CPU may reboot with a lot of reasons. Probably it is a memory issue (since we do not see your code) - you are overflowing your memory buffers, using wrong memory addresses… I am pretty sure it does not have anything with your UART or GPS.

3

Unless of course you are saving something in Flash on each cycle.

And Hmmm… external Watchdog!! That could solve my other problem of CPU hanging for I2C…