[mw_shl_code=c,true] RCC->AHB1ENR=1<<5; GPIOF->MODER &=~(1<<16|1<<18|1<<20); GPIOF->MODER = 1<<16|1<<18|1<<20; GPIOF->OTYPER &=~(1<<8|1<<9|1<<10); GPIOF->OTYPER = 1<<8|1<<9|1<<10; GPIOF->OSPEEDR &= ~(3<<16|3<<18|3<<20); GPIOF->OSPEEDR=3<<16|3<<18|3<<20; GPIOF->UPDR &= ~(2<<16|1<<18|1<<20); GPIOF->UPDR = 2<<16|1<<18|1<<20; // PFout(8)=1; // GPIOF->BSRRH = 1<<9; // GPIOF->BSRRH = 1<<10; while(1) { // PFout(8)=1; GPIOF->BSRRL = 1<<8; GPIOF->BSRRH = 1<<9; GPIOF->BSRRH = 1<<10;[/mw_shl_code] 不知道嘛回事了(⊙o⊙)…