adc.c

来自「8051入間程序」· C语言 代码 · 共 16 行

/**********************************
* P2   - output from ADC
* P3_6 - WR
* P3_7 - INTR
**********************************/

//Return binary code
unsigned char scanAdc(void)
{
	P2 = 0xFF;	//must set before use as input
	//low pulse
	P3_6 = 0;
	P3_6 = 1;
	while(P3_7);	//wait busy (1)
	return P2;
}