;   /* Configure PFx pins Output type to push-pull */     GPIOF->OTYPER  = 0x00000000;   /* No pull-up, pull-down for PFx pins */    GPIOF->PUPDR   = 0x00000000;    /* Connect PGx pins to FMC Alternate function */   GPIOG->AFR[0]  = 0x