freqpin.c

来自「在AT91sam7SE上」· C语言 代码 · 共 37 行

//FreqPin.c

#include	"Preprocess.h"
#include	"FreqPin.h"



VOID	FreqPinInit(VOID){
    AT91F_PMC_EnablePeriphClock ( AT91C_BASE_PMC, 1 << FREQ_PIN_ID ) ;
    AT91F_PIO_CfgOutput( FREQ_PIN_BASE, FREQ_PIN_MASK ) ;
	FreqPinSetLevel(HIGH);
}//VOID	FreqPinInit(VOID){


LEVEL	FreqPinGetlevel(VOID){
	if(FREQ_PIN_MASK == (AT91F_PIO_GetInput(FREQ_PIN_BASE) & FREQ_PIN_MASK)){
		return(HIGH);
	}else{
		return(LOW);
	}
}//LEVEL	FreqPinGetlevel(VOID){


VOID	FreqPinSetLevel(LEVEL lvLevel){
	if(HIGH == lvLevel){
	 	AT91F_PIO_SetOutput( FREQ_PIN_BASE, FREQ_PIN_MASK ) ;
	}else{
		AT91F_PIO_ClearOutput( FREQ_PIN_BASE, FREQ_PIN_MASK );
	
	}
}//VOID	FreqPinSetLevel(LEVEL lvLevel){