If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.
// *IMPORTANT* // The Device_cal function, which copies the ADC calibration values from TI reserved // OTP into the ADCREFSEL and ADCOFFTRIM registers, occurs automatically in the // Boot ROM. If the boot ROM code is bypassed during the debug process, the // following function MUST be called for the ADC to function according // to specification. The clocks to the ADC MUST be enabled before calling this // function. // See the device data manual and/or the ADC Reference // Manual for more information.
// To powerup the ADC the ADCENCLK bit should be set first to enable // clocks, followed by powering up the bandgap, reference circuitry, and ADC core. // Before the first conversion is performed a 5ms delay must be observed // after power up to give all analog circuits time to power up and settle
// Please note that for the delay function below to operate correctly the // CPU_RATE define statement in the F2806x_Examples.h file must // contain the correct CPU clock period in nanoseconds. EALLOW; AdcRegs.ADCCTL1.bit.ADCBGPWD = 1; // Power ADC BG AdcRegs.ADCCTL1.bit.ADCREFPWD = 1; // Power reference AdcRegs.ADCCTL1.bit.ADCPWDN = 1; // Power ADC AdcRegs.ADCCTL1.bit.ADCENABLE = 1; // Enable ADC AdcRegs.ADCCTL1.bit.ADCREFSEL = 0; // Select interal BG EDIS;
DELAY_US(ADC_usDELAY); // Delay before converting ADC channels
EALLOW; AdcRegs.ADCCTL2.bit.CLKDIV2EN = 1; EDIS;
DELAY_US(ADC_usDELAY); // Delay before converting ADC channels
EALLOW; // Assumes ePWM1 clock is already enabled in InitSysCtrl(); EPwm1Regs.ETSEL.bit.SOCAEN = 1; // Enable SOC on A group EPwm1Regs.ETSEL.bit.SOCASEL = 4; // Select SOC from from CPMA on upcount EPwm1Regs.ETPS.bit.SOCAPRD = 1; // Generate pulse on 1st event EPwm1Regs.CMPA.half.CMPA = 0x0200; // 0x0080; // Set compare A value EPwm1Regs.TBPRD = 0x9c3; // 0x7CF; // Set period for ePWM1 - 100us EPwm1Regs.TBCTL.bit.CTRMODE = 0; // count up and start EDIS;
