void InitADC(void)
{
EALLOW;
//write configurations
AdcaRegs.ADCCTL2.bit.PRESCALE = 0X2; //set ADCCLK divider to /4
AdcbRegs.ADCCTL2.bit.PRESCALE = 0X2; //set ADCCLK divider to /4
AdccRegs.ADCCTL2.bit.PRESCALE = 0X2; //set ADCCLK divider to /4
AdcdRegs.ADCCTL2.bit.PRESCALE = 0X2; //set ADCCLK divider to /4
AdcSetMode(ADC_ADCA, ADC_RESOLUTION_12BIT, ADC_SIGNALMODE_SINGLE);
AdcSetMode(ADC_ADCB, ADC_RESOLUTION_12BIT, ADC_SIGNALMODE_SINGLE);
AdcSetMode(ADC_ADCC, ADC_RESOLUTION_12BIT, ADC_SIGNALMODE_SINGLE);
AdcSetMode(ADC_ADCD, ADC_RESOLUTION_12BIT, ADC_SIGNALMODE_SINGLE);
//Set pulse positions to late
AdcaRegs.ADCCTL1.bit.INTPULSEPOS = 1;
AdcbRegs.ADCCTL1.bit.INTPULSEPOS = 1;
AdccRegs.ADCCTL1.bit.INTPULSEPOS = 1;
AdcdRegs.ADCCTL1.bit.INTPULSEPOS = 1;
//power up the ADC
AdcaRegs.ADCCTL1.bit.ADCPWDNZ = 1;
AdcbRegs.ADCCTL1.bit.ADCPWDNZ = 1;
AdccRegs.ADCCTL1.bit.ADCPWDNZ = 1;
AdcdRegs.ADCCTL1.bit.ADCPWDNZ = 1;
//delay for 1ms to allow ADC time to power up
DELAY_US(1000);
EDIS;
SetupADC();
}
void InitADC(void)
{
//ADCINB2//
//pin 26 on board//
AdcSetMode(ADC_ADCB, ADC_RESOLUTION_12BIT, ADC_SIGNALMODE_SINGLE);
EALLOW;
CpuSysRegs.PCLKCR13.bit.ADC_B = 1; //ADC_B Clock Enable
AdcbRegs.ADCCTL2.bit.PRESCALE = 6; //ADCCLK = Input Clock / 4.0 = 50MHz
AdcbRegs.ADCCTL1.bit.ADCPWDNZ = 1; //All analog circuitry inside the core is powered up
AdcbRegs.ADCCTL1.bit.INTPULSEPOS = 1; //Interrupt pulse generation occurs at the end of the conversion
AdcbRegs.ADCSOC0CTL.bit.TRIGSEL = 0x0B; //ADCTRIG11 - ePWM4, ADCSOCA trigger;
AdcbRegs.ADCSOC0CTL.bit.CHSEL = 2; //ADCIN2: pin 26 on baord
AdcbRegs.ADCSOC0CTL.bit.ACQPS = 40; //sample window is number + 1 SYSCLK cycles
AdcbRegs.ADCINTSEL1N2.bit.INT1SEL = 0; //EOC0 is trigger for ADCINT1
AdcbRegs.ADCINTSEL1N2.bit.INT1E = 1; //Enable ADCINT1
PieVectTable.ADCB1_INT = &adcb1_isr; //int 1.2
IER |= M_INT1; //Enable group 1 interrupts
EINT; // Enable Global interrupt INTM
ERTM; // Enable Global realtime interrupt DBGM
PieCtrlRegs.PIEIER1.bit.INTx2 = 1; //Interrupt Enable for INT1.2
ClkCfgRegs.PERCLKDIVSEL.bit.EPWMCLKDIV = 1; //PWMFeq=100MHz
CpuSysRegs.PCLKCR2.bit.EPWM4=1; //Disable Clock Gating
EPwm4Regs.TBCTL.bit.CTRMODE = 00; //Up count mode
EPwm4Regs.TBCTL.bit.HSPCLKDIV = 0x0; //Clock ratio to SYSCLKOUT = 1
EPwm4Regs.TBCTL.bit.CLKDIV = 0x0;
EPwm4Regs.TBPRD = 2000; //freq: 50kHz
EPwm4Regs.ETSEL.bit.SOCASEL = 1; // Enable event time-base counter equal to zero
EPwm4Regs.ETPS.bit.SOCAPRD = 1; // 1 Event has occured for SOCA
EPwm4Regs.ETSEL.bit.SOCAEN = 1; // Enable SOCA
CpuSysRegs.PCLKCR0.bit.TBCLKSYNC = 1; //start PWM counters
EDIS;
}
//
// ConfigureADC - Write ADC configurations and power up the ADC for both
// ADC A and ADC B
//
void ConfigureADC(void)
{
EALLOW;
//
//write configurations
//
AdcaRegs.ADCCTL2.bit.PRESCALE = 6; //set ADCCLK divider to /4
AdcSetMode(ADC_ADCA, ADC_RESOLUTION_12BIT, ADC_SIGNALMODE_SINGLE);
//
//Set pulse positions to late
//
AdcaRegs.ADCCTL1.bit.INTPULSEPOS = 1;
//
//power up the ADC
//
AdcaRegs.ADCCTL1.bit.ADCPWDNZ = 1;
//
//delay for 1ms to allow ADC time to power up
//
DELAY_US(1000);
EDIS;
}
void main()
{
volatile int status = 0;
uint16_t i;
volatile FILE *fid;
// If running from flash copy RAM only functions to RAM
#ifdef _FLASH
memcpy(&RamfuncsRunStart, &RamfuncsLoadStart, (size_t)&RamfuncsLoadSize);
#endif
// Initialize System Control:
// PLL, WatchDog, enable Peripheral Clocks
// This example function is found in the F2806x_SysCtrl.c file.
InitSysCtrl();
// For this example, only init the pins for the SCI-A port.
EALLOW;
GpioCtrlRegs.GPCMUX2.bit.GPIO84 = 1;
GpioCtrlRegs.GPCMUX2.bit.GPIO85 = 1;
GpioCtrlRegs.GPCGMUX2.bit.GPIO84 = 1;
GpioCtrlRegs.GPCGMUX2.bit.GPIO85 = 1;
EDIS;
// Clear all interrupts and initialize PIE vector table:
// Disable CPU interrupts
DINT;
// Initialize PIE control registers to their default state.
// The default state is all PIE interrupts disabled and flags
// are cleared.
// This function is found in the F2806x_PieCtrl.c file.
InitPieCtrl();
// Disable CPU interrupts and clear all CPU interrupt flags:
IER = 0x0000;
IFR = 0x0000;
// Initialize the PIE vector table with pointers to the shell Interrupt
// Service Routines (ISR).
// This will populate the entire table, even if the interrupt
// is not used in this example. This is useful for debug purposes.
// The shell ISR routines are found in F2806x_DefaultIsr.c.
// This function is found in F2806x_PieVect.c.
InitPieVectTable();
// Initialize SCIA
scia_init();
//Initialize GPIOs for the LEDs and turn them off
EALLOW;
GpioCtrlRegs.GPADIR.bit.GPIO12 = 1;
GpioCtrlRegs.GPADIR.bit.GPIO13 = 1;
GpioDataRegs.GPADAT.bit.GPIO12 = 1;
GpioDataRegs.GPADAT.bit.GPIO13 = 1;
EDIS;
// Enable global Interrupts and higher priority real-time debug events:
EINT; // Enable Global interrupt INTM
ERTM; // Enable Global realtime interrupt DBGM
// Configure the ADC:
// Initialize the ADC
EALLOW;
//write configurations
AdcaRegs.ADCCTL2.bit.PRESCALE = 6; //set ADCCLK divider to /4
AdcbRegs.ADCCTL2.bit.PRESCALE = 6; //set ADCCLK divider to /4
AdcSetMode(ADC_ADCA, ADC_RESOLUTION_12BIT, ADC_SIGNALMODE_SINGLE);
AdcSetMode(ADC_ADCB, ADC_RESOLUTION_12BIT, ADC_SIGNALMODE_SINGLE);
//Set pulse positions to late
AdcaRegs.ADCCTL1.bit.INTPULSEPOS = 1;
AdcbRegs.ADCCTL1.bit.INTPULSEPOS = 1;
//power up the ADCs
AdcaRegs.ADCCTL1.bit.ADCPWDNZ = 1;
AdcbRegs.ADCCTL1.bit.ADCPWDNZ = 1;
//delay for 1ms to allow ADC time to power up
DELAY_US(1000);
//ADCA
EALLOW;
AdcaRegs.ADCSOC0CTL.bit.CHSEL = 0x0E; //SOC0 will convert pin ADCIN14
AdcaRegs.ADCSOC0CTL.bit.ACQPS = 25; //sample window is acqps + 1 SYSCLK cycles
AdcaRegs.ADCSOC1CTL.bit.CHSEL = 0x0E; //SOC1 will convert pin ADCIN14
AdcaRegs.ADCSOC1CTL.bit.ACQPS = 25; //sample window is acqps + 1 SYSCLK cycles
AdcaRegs.ADCINTSEL1N2.bit.INT1SEL = 1; //end of SOC1 will set INT1 flag
AdcaRegs.ADCINTSEL1N2.bit.INT1E = 1; //enable INT1 flag
AdcaRegs.ADCINTFLGCLR.bit.ADCINT1 = 1; //make sure INT1 flag is cleared
//Redirect STDOUT to SCI
status = add_device("scia", _SSA, SCI_open, SCI_close, SCI_read, SCI_write, SCI_lseek, SCI_unlink, SCI_rename);
fid = fopen("scia","w");
freopen("scia:", "w", stdout);
setvbuf(stdout, NULL, _IONBF, 0);
//Print a TI Logo to STDOUT
drawTILogo();
//Twiddle LEDs
GpioDataRegs.GPADAT.bit.GPIO12 = 0;
GpioDataRegs.GPADAT.bit.GPIO13 = 1;
for(i = 0; i < 50; i++){
GpioDataRegs.GPATOGGLE.bit.GPIO12 = 1;
GpioDataRegs.GPATOGGLE.bit.GPIO13 = 1;
DELAY_US(50000);
}
//LEDs off
GpioDataRegs.GPADAT.bit.GPIO12 = 1;
GpioDataRegs.GPADAT.bit.GPIO13 = 1;
//Clear out one of the text boxes so we can write more info to it
clearTextBox();
currentSample = sampleADC();
//Main program loop - continually sample temperature
for(;;) {
//Sample ADCIN14
currentSample = sampleADC();
//Update the serial terminal output
updateDisplay();
//If the sample is above midscale light one LED
if(currentSample > 2048){
GpioDataRegs.GPADAT.all = 0x2000;
}else{
//Otherwise light the other
GpioDataRegs.GPADAT.all = 0x1000;
}
DELAY_US(1000000);
}
}