Hi there...
I have a problem here regarding to the ADCRESULT1. When I use 1 sensor, then I got the ADC value on the ADCRESULT0. But, when I connect the second sensor to the ADC pin on the tms320f2812 dsp board, the ADC value on the ADCRESULT1 are not as expected. Here I attach some of the source code that I have edited for your reference.
AdcRegs.ADCTRL1.bit.ACQ_PS = ADC_SHCLK;
AdcRegs.ADCTRL3.bit.ADCCLKPS = ADC_CKPS;
AdcRegs.ADCTRL1.bit.SEQ_CASC = 1; // 1 Cascaded mode
AdcRegs.ADCCHSELSEQ1.bit.CONV00 = 0x8;
AdcRegs.ADCCHSELSEQ1.bit.CONV01 = 0xA;
AdcRegs.ADCTRL1.bit.CONT_RUN = 1; // Setup continuous run
AdcRegs.ADCMAXCONV.bit.MAX_CONV1 = 0x1; // convert and store in 2 results registers
// Clear SampleTable
for (i=0; i<BUF_SIZE; i++)
{
SampleTable[i] = 0;
}
// Start SEQ1
AdcRegs.ADCTRL2.all = 0x2000;
GpioDataRegs.GPBDAT.all = 0xFFFF;
// Take ADC data and log the in SampleTable array
while(1)
{
for (i=0; i<AVG; i++)
{
while (AdcRegs.ADCST.bit.INT_SEQ1== 0) {} // Wait for interrupt
// Software wait = (HISPCP*2) * (ADCCLKPS*2) * (CPS+1) cycles
// = (3*2) * (1*2) * (0+1) = 12 cycles
asm(" RPT #11 || NOP");
AdcRegs.ADCST.bit.INT_SEQ1_CLR = 1;
Voltage1[ConversionCount] =( (AdcRegs.ADCRESULT0>>4) );
Voltage2[ConversionCount] =( (AdcRegs.ADCRESULT1>>4) );
Please help me to solve this prob.
thanks...