M-Labs
/
artiq
mirror of https://github.com/m-labs/artiq.git
2
0
Fork 1
Code Issues Projects Releases Wiki Activity

runtime/main: fix sys_now

This commit is contained in:
Sebastien Bourdeauducq 2015-04-24 18:30:27 +08:00
parent 934a6b0495
commit 8f5f428c0b
1 changed files with 7 additions and 9 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

16
soc/runtime/main.c
View File

@ -27,21 +27,19 @@
#ifdef CSR_ETHMAC_BASE
unsigned char macadr[6] = {0x10, 0xe2, 0xd5, 0x00, 0x00, 0x00};
u32_t clock_ms;
static int clkdiv;
u32_t sys_now(void)
{
unsigned int freq;
unsigned int prescaler;
static unsigned long long int clock_sys;
u32_t clock_ms;
freq = identifier_frequency_read();
prescaler = freq/1000; /* sys_now expects time in ms */
timer0_update_value_write(1);
clock_ms += (0xffffffff - timer0_value_read())/prescaler;
/* Reset timer to avoid rollover, this will increase clock_ms
drift but we don't need precision */
clock_sys += 0xffffffff - timer0_value_read();
timer0_en_write(0);
timer0_en_write(1);
clock_ms = clock_sys/clkdiv;
return clock_ms;
}
@ -66,7 +64,7 @@ static void network_init(void)
timer0_load_write(0xffffffff);
timer0_reload_write(0xffffffff);
timer0_en_write(1);
clock_ms = 0;
clkdiv = identifier_frequency_read()/1000;
IP4_ADDR(&local_ip, 192, 168, 0, 42);
IP4_ADDR(&netmask, 255, 255, 255, 0);