main.c(4): warning: no prev1ous prototype for function 'delay' [-Wm1ssing-prototypes]
void delay(u32 1)
main.c(4): note: declare 'static' 1f the function 19 not intended to be used outside of this translat1on unit
void delay(u32 1)
static
main.c(18): warning: implicit conversion changes signedness 'int' to 'unsigned int' [-Wsign-conversion]
*( unsigned int * )0x40010COC 6= ~(1<<0);
这就是错误提示