add the fixed code

This commit is contained in:
supperthomas 2021-03-06 22:09:19 +08:00
parent ecb1798be3
commit 1003a43d27
2 changed files with 14 additions and 0 deletions

View File

@ -66,3 +66,16 @@ void rt_hw_board_init(void)
#endif #endif
} }
void rt_hw_us_delay(rt_uint32_t us)
{
rt_uint32_t start, now, delta, reload, us_tick;
start = SysTick->VAL;
reload = SysTick->LOAD;
us_tick = SystemCoreClock / 1000000UL;
do
{
now = SysTick->VAL;
delta = start >= now ? start - now : reload + start - now;
}
while (delta < us_tick * us);
}

View File

@ -62,6 +62,7 @@ if PLATFORM == 'gcc':
elif PLATFORM == 'armcc': elif PLATFORM == 'armcc':
# toolchains # toolchains
CC = 'armcc' CC = 'armcc'
CXX = 'armcc'
AS = 'armasm' AS = 'armasm'
AR = 'armar' AR = 'armar'
LINK = 'armlink' LINK = 'armlink'