help with debuging the ADC reading

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s3034585
Posts: 27
Joined: Fri Jun 13, 2008 7:30 pm

help with debuging the ADC reading

Post by s3034585 » Tue Apr 07, 2009 9:40 pm

hi guys...

i have written a code to enable the adc10 and trying to debug its reading.

how to see what are the actual readings..
i am trying to sprintf them to temp_rd buffer and trying to send them over the UART.. but this is not working... if i just use
sprintf (temp_rd,"A%d %d %d %d\r\n",1,2,3,4 );

i can see this on the uart but if i try to put the adc readings in it i cant see anything ... can one pls help me...


thanks


-----------------------------code-----------------------------------------
void main( void )
{
unsigned int wait;
// Initalization
WDTCTL = WDTPW + WDTHOLD; // Stop watchdog timer

// ?????????????????????????
InitOsc();
// ?????????????????????????
// configure the UART
P3SEL = 0x30; // P3.3,4 = USART0 TXD/RXD
ME2 |= UTXE0 + URXE0; // Enabled USART0 TXD/RXD
UCTL0 |= CHAR; // 8-bit character, SWRST=1
UTCTL0 |= SSEL0; // UCLK = ACLK
UBR00 = 0x03; // 9600 from 1Mhz
UBR10 = 0x00; //
UMCTL0 = 0x4A; // Modulation
UCTL0 &= ~SWRST; // Initialize USART state machine
IE2 |= URXIE0 + UTXIE0; // Enable USART0 RX/TX interrupt
IFG2 &= ~UTXIFG0; // Clear inital flag on POR


P1SEL = 0; //BIT4;
P2SEL = 0; //BIT0;

// Configure the LED Output (1 = output, 0 = input)
PDIR_LED |= LED; // Set port 2.0 to output
//POUT_LED &= ~LED;

// Configure Unconnected pins as Outputs
P1DIR = BIT4 ;
P2DIR = BIT0 ;

ADC10AE |= BIT7; // ADC option select A7

_BIS_SR( GIE);


while(1)
{
MeasureTemp(0);
if(tx_flg == 1)
{
tx_flg = 0;
//sprintf(temp_rd,"A%d %d %d %d\r\n",1,2,3,4 );
i =0;
TXBUF0 = temp_rd[i++];
}
}
}

// UART0 TX ISR
#pragma vector=USART0TX_VECTOR
__interrupt void usart0_tx (void)
{
POUT_LED ^= LED;
if (temp_rd)
//TXBUF0 = string1[i++];
TXBUF0 = temp_rd[i++];
else
tx_flg =1;
}

// UART0 RX ISR
#pragma vector=USART0RX_VECTOR
__interrupt void usart0_rx (void)
{
POUT_LED ^= LED;
if (RXBUF0 == 'u') // 'u' received?
{
//i = 0;
//TXBUF0 = string1[i++];
//TXBUF0 = temp_rd[i++];
}
}

void MeasureTemp( unsigned char synch )
{
unsigned char i;
union UN_BYTE_WORD ByteWord;

ADC10CTL0 = SREF_1 | ADC10SR | REFOUT | ADC10SHT_2 | MSC | REF2_5V | REFON | ADC10ON | ADC10IE;
VoltageFlag = 1;

ADC10CTL1 = INCH3 | INCH1 | INCH0;
ADC10DTC1 = 0; // Disable Multiple Transfers

ADC10CTL0 |= ENC + ADC10SC; // Sampling and conversion start
ADC10CTL0 &= ~ENC;

while (ADC10CTL1 & BUSY); // Wait if ADC10 core is active
ADC10CTL0 = SREF_1 | ADC10SR | REFOUT | ADC10SHT_2 | MSC | REFON | ADC10ON | ADC10IE;
ADC10CTL1 = INCH2 | INCH1 | INCH0 | CONSEQ_2;
ADC10DTC1 = 32; // 64 conversions
ADC10SA = (unsigned short)&DataBuffer; // Data buffer start

ADC10CTL0 |= ENC + ADC10SC; // Sampling and conversion start

ADC10CTL0 &= ~ENC;
ADC10CTL0 = 0; // Power down the ADC

ByteWord.wv = 0;
for ( i = 0; i < 32; i++ )
{
ByteWord.wv += DataBuffer;
}
ByteWord.wv = ByteWord.wv >> 5;
temperature = ByteWord.wv;


sprintf(temp_rd," %d \r\n",DataBuffer[31]);

}[/code]

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