Here is the circuit diagram:
ADC0832 package diagram ADC0832 and microcontroller connection diagram ADC0832 timing diagram Program source code download: http://www.51hei.com/f/0832430.rar #include
#define DO (P1IN&BIT7)
#define uchar unsigned char
#define uint unsigned int[page]
/***********************************************
sbit cs=P2^0;
sbit clk=P2^1;
sbit DI=P2^2;
sbit DO=P2^6;
*************************************************/
uint adval;
uchar temp;
uchar tab[]={0xc0,0xf9,0xa4,0xb0,0x99,0x92,0x82,0xf8,0x80,0x90};
void delay(uint ms)
{
uchar j;
while(ms--)
{
for(j=0;j<120;j++);
}
}
void ADC_start()
{
P2OUT|=BIT0;//cs=1
_NOP();
P2OUT&=~BIT1;//clk=0
_NOP();
P2OUT&=~BIT0;//cs=0
_NOP();
P2OUT|=BIT 2;//DI=1
_NOP();
P2OUT|=BIT1;//clk=1
_NOP();
P2OUT&=~BIT2;//DI=0;
_NOP();
P2OUT&=~BIT1;//clk=0;
_NOP();
}
void ADC_read(uint CH)
{
uchar i;
ADC_start();
if(CH==0) //Select channel 0
{
P2OUT|=B IT2;// DI=1;
P2OUT |=BIT1;//clk=1;
_NOP();
_NOP();
P2OUT &=~BIT1;//clk=0;//The first falling edge comes DI=1
_NOP();
_NOP();
P2OUT |=BIT2;//DI=0;
P2OUT |=BIT1;//clk=1;
_NOP();
_NOP();
P2OUT&=~BIT1;//clk=0;//The second falling edge comes DI=0, DI is 10 twice, select ch0 channel
_NOP();
_NOP();
}
else //Select channel 1
{
P2OUT|=BIT2;// DI=1;
P2OUT |=BIT1;//clk=1;
_NOP();
_NOP();
P2OUT &=~BIT1;//clk=0;//The first falling edge comes DI=1
_NOP();
_NOP();
P2OUT |=BIT2;//DI=1;
P2OUT |=BIT1;//clk=1;
_NOP();
_NOP();
P2OUT&=~BIT1;//clk=0;//The second falling edge comes DI=0, DI is 11 twice, select ch1 channel_NOP
();
_NOP();
}
/****************Read data on the falling edge*******************/
P2OUT|=BIT1;//clk=1;
_NOP();
P2OUT&=~BIT1;//clk=0;Read data on the falling edge againfor
(i=0;i<8;i++)
{
P2OUT|=BIT2;// DI=1;
if(DO) // 检查DO;
{
temp |=0x01;
}
else
{
temp &=0xfe;
}
P2OUT&=~BIT1;//clk=0;
_NOP();
_NOP();
P2OUT|=BIT1;//clk=1;//rising edge, shift left by 1 bit
temp=temp<<1;
}
adval=temp;
}
/********Display data********************************/
void display(uint dat)
{
P2OUT &=~BIT3;//Turn off the ones digit display P2.3
P2OUT &=~BIT4;//Turn off the tens digit display P2.4
P2OUT |=BIT5;//Turn on the hundreds digit display P2.5
P1OUT=tab[dat/100];
delay(1);
P1OUT=0xff;
P2OUT &=~BIT3;//turn off the ones digit display P2.3
P2OUT |=BIT4;//turn on the tens digit display P2.4
P2OUT &=~BIT5;//turn off the hundreds digit display P2.5
P1OUT=tab[(dat%100)/10];
delay(1);
P1OUT=0xff;
P2OUT |=BIT3;//turn on the ones digit display P2.3
P2OUT &=~BIT4;//turn off the tens digit display P2.4
P2OUT &=~BIT5;//turn off the hundreds digit display P2.5
P1OUT=tab[dat/10];
delay(1);
P1OUT=0xff;
}
void main()
{
WDTCTL = WDTPW + WDTHOLD;
P2DIR =0x3f;
P1DIR|=0x7f;
while(1)
{
ADC_read(0);
delay(1);
display(adval);
}
}
Keywords：ADC0832
Reference address：ADC0832 analog-to-digital conversion MSP430 microcontroller program + circuit diagram
ADC0832 package diagram ADC0832 and microcontroller connection diagram ADC0832 timing diagram Program source code download: http://www.51hei.com/f/0832430.rar #include
{
P2OUT|=BIT2;// DI=1;
if(DO) // 检查DO;
{
temp |=0x01;
}
else
{
temp &=0xfe;
}
P2OUT&=~BIT1;//clk=0;
_NOP();
_NOP();
P2OUT|=BIT1;//clk=1;//rising edge, shift left by 1 bit
temp=temp<<1;
}
adval=temp;
}
/********Display data********************************/
void display(uint dat)
{
P2OUT &=~BIT3;//Turn off the ones digit display P2.3
P2OUT &=~BIT4;//Turn off the tens digit display P2.4
P2OUT |=BIT5;//Turn on the hundreds digit display P2.5
P1OUT=tab[dat/100];
delay(1);
P1OUT=0xff;
P2OUT &=~BIT3;//turn off the ones digit display P2.3
P2OUT |=BIT4;//turn on the tens digit display P2.4
P2OUT &=~BIT5;//turn off the hundreds digit display P2.5
P1OUT=tab[(dat%100)/10];
delay(1);
P1OUT=0xff;
P2OUT |=BIT3;//turn on the ones digit display P2.3
P2OUT &=~BIT4;//turn off the tens digit display P2.4
P2OUT &=~BIT5;//turn off the hundreds digit display P2.5
P1OUT=tab[dat/10];
delay(1);
P1OUT=0xff;
}
void main()
{
WDTCTL = WDTPW + WDTHOLD;
P2DIR =0x3f;
P1DIR|=0x7f;
while(1)
{
ADC_read(0);
delay(1);
display(adval);
}
}
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