RAM and OFF mode

RE: RAM and OFF mode

Anand Ramashetty — Fri, 27 Mar 2015 18:04:27 GMT

what is the syntax in GCC environment

RE: RAM and OFF mode

Håkon Alseth — Wed, 09 Apr 2014 09:46:51 GMT

When using the softdevice, the second ram-block is used for the application. Make sure that both RAM-blocks are being powered under systemoff using sd_power_ramon_set(). Please see the nRF51 reference manual for which bits you should set in the register.

RE: RAM and OFF mode

larry — Wed, 09 Apr 2014 07:04:47 GMT

thanks for your swift reply, i used the routine you gived , under the condition of i did not use softdivce ,my varaible can be saved when waking up.but my variable will be clear when i use s110 v6.Why is this so.

RE: RAM and OFF mode

Håkon Alseth — Tue, 08 Apr 2014 10:38:46 GMT

Hi,

Did you read using sd_power_ramon_get() to verify that it's set properly? Regarding clearing of RAM on wakeup: The startup script will clear sections of RAM unless stated so in the attributes when declaring the variable. Syntax for keil is: static uint32_t myvar __attribute__( ( section( "NoInit"), zero_init) );

Best regards Håkon

System OFF_noinit.zip