chprintf and unsigned long long type (uint64_t)

[plyatov]

Dear all,

I need uint64_t variables to store time in seconds. It need to be capacious enough to store many years without overflow.

Does somebody have patch or idea for chprintf function to support "unsigned long long" type or "uint64_t"?

Current implementation of chprintf() in ChibiOS-2.4.6 does not understand such a type.

Here is example, which print "123456 0" instead of "123456 78":

Code: Select all

uint64_t time = 123456;
uint16_t other_var = 78;

chprintf((BaseSequentialStream *)&SD1, "%ld %d\n\r", time, other_var);


Second example, which print "ld 123456" instead of "123456 78":

Code: Select all

uint64_t time = 123456;
uint16_t other_var = 78;

chprintf((BaseSequentialStream *)&SD1, "%lld %d\n\r", time, other_var);


Any ideas?

[Giovanni]

Hi,

chprintf() is meant to be an utility non a full implementation, you could just use the normal printf() in the C library.

Giovanni

[Jacon]

I need uint64_t variables to store time in seconds. It need to be capacious enough to store many years without overflow.
....
Any ideas?

Yep - do you really need count for more then 138 ( ) years:

3600 * 24 * 30 * 12 * 138 ....... = 4292352000 < 2^32, i.e. uint32_t
_hr___d___m__y___no of ys

[rvanspaa]

Hi,

chprintf() is meant to be an utility non a full implementation, you could just use the normal printf() in the C library.

Giovanni

Hi Giovanni,

printf expects to print to stdout, however this isn't connected to a BaseSequentialStream under ChibiOS. How does one go about establishing such a connection?

[rvanspaa]

Hi,

chprintf() is meant to be an utility non a full implementation, you could just use the normal printf() in the C library.

Giovanni

Hi Giovanni,

Please ignore previous email, I found syscalls.c, but now can't find how to delete a post (delete icon missing from post). Must have been up too long already.