?? sdram.c
字號:
#define GPBCON (*(volatile unsigned long *)0x56000010)#define GPBDAT (*(volatile unsigned long *)0x56000014)#define GPB7_out (1<<(7*2))#define GPB8_out (1<<(8*2))#define GPB9_out (1<<(9*2))#define GPB10_out (1<<(10*2))void wait(unsigned long dly){ for(; dly > 0; dly--);}int main(){ unsigned long i = 0; GPBCON = GPB7_out|GPB8_out|GPB9_out|GPB10_out; while(1){ wait(30000); GPBDAT = (~(i<<7)); if(++i == 16) i = 0; } return 0;}
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