nrf52840 uint64_t problem

[_Dejan_]

I have one problem with unsing uint64_t in application...

Im for test try simple demo:

uint64_t test = 1327644190303473294;
NRF_LOG_INFO("test: %"PRIX64"\n", test);

But I receive in RTT Viewer output:

 0> APP:INFO:test: 0

What Im doing wrong? Thanks for any help :)

[syntroniks]

What do you expect to see?

I am not a printf formatting expert, but perhaps you instead want

NRF_LOG_INFO("test: %llu\n", test);

For an 'unsigned long long'. Also check your library settings to see if you have support for long longs. I know it can be turned off to save space for some toolchains.

[_Dejan_]

Something still doesn't work ok:

uint64_t test = 7340861779410949837;
NRF_LOG_INFO("test: %llu\n", test);
NRF_LOG_FLUSH();

Produce:

 0> APP:INFO:test: 47549582942412

I will check project settings...

P.S. If I disable MicroLib I get:

0> APP:INFO:test: 319297229

This is if I convert uint64 to 2xuint32 by calculator on pc one of int32 ...

If I change Optimization from Level 3 to Level 0 result is same...

[Roger Clark]

Do you need this number in decimal ?

You could split into 2 blocks of uint32_t hex and display them side by side to make it look like 64 bits worth of hex

[_Dejan_]

No char array is also ok. Im also found that NRF_LOG_INFO doesn't work witn char array(strings) ... Example:

uint32_t info_variant = NRF_FICR->INFO.VARIANT;

unsigned char buffer[5];
buffer[0] = info_variant >> 24;
buffer[1] = info_variant >> 16;
buffer[2] = info_variant >> 8;
buffer[3] = info_variant;  
buffer[4] = '\0';

NRF_LOG_INFO("string: %s \n", buffer);
SEGGER_RTT_printf(0, "string: %s \n", buffer);
NRF_LOG_FLUSH();

SEGGER_RTT_printf function print AAAA which is OK. But If I try use NRF_LOG_INFO building produce error.

[_Dejan_]

Im figure out this last problem...

uint32_t info_variant = NRF_FICR->INFO.VARIANT;
	
char buffer[5];
buffer[0] = info_variant >> 24;
buffer[1] = info_variant >> 16;
buffer[2] = info_variant >> 8;
buffer[3] = info_variant;  
buffer[4] = '\0';
	
 
NRF_LOG_INFO("string: %s \n", nrf_log_push(buffer));
NRF_LOG_FLUSH();