Other Parts Discussed in Thread: MSP430G2553
#include <msp430g2553.h>
#include <stdbool.h>
////////////////Defines////////////////
char buffer[4];
float temp;
int value=0;
////////////////Function Protos////////////////
void TX(char *tx_message);
static char *i2a(unsigned i, char *a, unsigned r);
char *itoa(int i, char *a, int r);
void ADC_init(void);
static char *i2a(unsigned i, char *a, unsigned r)
{
if (i/r > 0) a = i2a(i/r,a,r);
*a = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ"[i%r];
return a+1;
}
char *itoa(int i, char *a, int r)
{
if ((r < 2) || (r > 36)) r = 10;
if (i < 0)
{
*a = '-';
*i2a(-(unsigned)i,a+1,r) = 0;
}
else *i2a(i,a,r) = 0;
return a;
}
void TX(char *tx_message)
{
while(*tx_message)
{
UCA0TXBUF = *tx_message;
__delay_cycles(10000);
tx_message++;
}
}
void ADC_init()
{
/* Configure ADC Channel */
ADC10CTL1 = INCH_5 + ADC10DIV_3 +ADC10SSEL_3; // Channel 5, ADC10CLK/4
ADC10CTL0 = SREF_0 + ADC10SHT_3 + ADC10ON + ADC10IE; //Vcc & Vss as reference
ADC10AE0 |= BIT5; //P1.4 ADC option
}
////////////////////////////////MAIN PROGRAM LOOP//////////////////////////////////////////////////
void main(void)
{
WDTCTL = WDTPW + WDTHOLD; // Stop WDT
BCSCTL1 = CALBC1_1MHZ; // Set DCO to 1MHz
DCOCTL = CALDCO_1MHZ;
////////////////USCI setup////////////////
P1SEL = BIT1 + BIT2 ; // Set P1.1 to RXD and P1.2 to TXD
P1SEL2 = BIT1 + BIT2; //
UCA0CTL1 |= UCSSEL_2; // Have USCI use SMCLK AKA 1MHz main CLK
UCA0BR0 = 104; // Baud: 9600, N= CLK/Baud, N= 10^6 / 9600
UCA0BR1 = 0; // Set upper half of baud select to 0
UCA0MCTL = UCBRS_1; // Modulation UCBRSx = 1
UCA0CTL1 &= ~UCSWRST; // Start USCI
//////////////SETUP ADC10 TO READ FROM CH A4 (P1.4)/////////////////////////////////////////////
ADC_init();
__enable_interrupt(); // Enable interrupts.
TX("welcome");
////////////////Main Loop////////////////
while(1)
{
__delay_cycles(1000); // Wait for ADC Ref to settle
ADC10CTL0 |= ENC + ADC10SC; // Sampling and conversion start
__bis_SR_register(CPUOFF + GIE); // LPM0 with interrupts enabled
ADC10CTL0 &= ~ENC; // Disable ADC conversion
ADC10CTL0 &= ~(REFON + ADC10ON);
value = ADC10MEM;
value /= 284;
itoa(value, buffer, 10);
TX("threshold value is:");
TX(buffer);
_delay_cycles(50000);
} // End While
} // End Main Program
// ADC10 interrupt service routine
#pragma vector=ADC10_VECTOR
__interrupt void ADC10_ISR (void)
{
__bic_SR_register_on_exit(CPUOFF); // Return to active mode
}
im trying display my adc value in my serial monitor but its not shown the value. i dont know where i done the error.guys any one tell me as soon as possible.its urgent...........
