Forum Discussion

Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
14 years ago

usleep() issue

Hello. In this code: fprintf(lcd_name, string1); usleep(2000000); fprintf(lcd_name, string2); second string should appear on LCD after 2 sec. But it appears without any delays! It's interes...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
14 years ago

--- Quote Start ---

Hi

my suggestion would be not to use usleep. Instead use the system_clk. For example: 

alt_u32 wait_time = alt_nticks() + xxx;
while(wait_time > alt_nticks());
Does that make sense?

--- Quote End ---

This wil possibly improve the precision of time delay but it will not solve Hatter's problem: it's still a blocking loop.