TMS320F28035: ADC初始化和EPWM冲突

您好， 已经收到了您的案例，调查需要些时间，感谢您的耐心等待。

我不确定我是否理解您的问题。 您的问题是 ADC 被意外触发了吗？

不是，是我把ADC初始化放到下图代码的前面，ADC就正常采样，结果寄存器有值跳动，如果放在下图代码后面，ADC好像就不采样，结果寄存器的值就一直等于0

adc初始化前面有EALLOW吗?

有EALLOW；

可是你又写了EDIS呀

我用的是另一款芯片，system config生成的代码，整个外设的初始化都是需要EALLOW的，你可以试试看。

但是在这两个里面函数开始和结尾都有EALLOW和EDIS

void InitAdc(void)
{
extern void DSP28x_usDelay(Uint32 Count);

// *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.

EALLOW;
SysCtrlRegs.PCLKCR0.bit.ADCENCLK = 1;
(*Device_cal)();
EDIS;

// 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 DSP2803x_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
}

咦 那就不知道了 能力有限。。 蹲一下官方回答

只是讨论下，，那你给他回复吧

您能否分享您的 ADC 设置？ 您使用哪一个 PWM 作为触发器？

void ADC28035_Init(void)
{

EALLOW;
AdcRegs.ADCCTL1.bit.INTPULSEPOS = 1; // ʼ
AdcRegs.INTSEL1N2.bit.INT1E = 1;
AdcRegs.INTSEL1N2.bit.INT1CONT = 1;
AdcRegs.INTSEL1N2.bit.INT2CONT = 1;
AdcRegs.INTSEL1N2.bit.INT1SEL = 0;
AdcRegs.INTSEL1N2.bit.INT2SEL = 0;

AdcRegs.ADCSOC0CTL.bit.CHSEL = 0; //set SOC0 channel select to ADCINA0SOC0 ƼĴ SOC15 ƼĴ
AdcRegs.ADCSOC1CTL.bit.CHSEL = 1; //set SOC1 channel select to ADCINA1
AdcRegs.ADCSOC2CTL.bit.CHSEL = 2; //set SOC2 channel select to ADCINA2
AdcRegs.ADCSOC3CTL.bit.CHSEL = 3; //set SOC3 channel select to ADCINA3
AdcRegs.ADCSOC4CTL.bit.CHSEL = 4; //set SOC4 channel select to ADCINA4
AdcRegs.ADCSOC5CTL.bit.CHSEL = 5;
AdcRegs.ADCSOC6CTL.bit.CHSEL = 6;
AdcRegs.ADCSOC7CTL.bit.CHSEL = 7;
AdcRegs.ADCSOC8CTL.bit.CHSEL = 8;
AdcRegs.ADCSOC9CTL.bit.CHSEL = 9;
AdcRegs.ADCSOC10CTL.bit.CHSEL = 10; //set SOC4 channel select to ADCINA4
AdcRegs.ADCSOC11CTL.bit.CHSEL = 11;
AdcRegs.ADCSOC12CTL.bit.CHSEL = 12;
AdcRegs.ADCSOC13CTL.bit.CHSEL = 13;
AdcRegs.ADCSOC14CTL.bit.CHSEL = 5;
AdcRegs.ADCSOC15CTL.bit.CHSEL = 5;
//SOCx Դѡ λ
AdcRegs.ADCSOC0CTL.bit.TRIGSEL = 1; //set SOC0 start trigger on TIME0, due to round-robin SOC0 converts first then SOC1
AdcRegs.ADCSOC1CTL.bit.TRIGSEL = 1; //set SOC1 start trigger on TIME0, due to round-robin SOC0 converts first then SOC1
AdcRegs.ADCSOC2CTL.bit.TRIGSEL = 1; //set SOC2 start trigger on TIME0, due to round-robin SOC0 converts first then SOC1
AdcRegs.ADCSOC3CTL.bit.TRIGSEL = 1; //set SOC3 start trigger on TIME0, due to round-robin SOC0 converts first then SOC1
AdcRegs.ADCSOC4CTL.bit.TRIGSEL = 1;
AdcRegs.ADCSOC5CTL.bit.TRIGSEL = 1;
AdcRegs.ADCSOC6CTL.bit.TRIGSEL = 1;
AdcRegs.ADCSOC7CTL.bit.TRIGSEL = 1;
AdcRegs.ADCSOC8CTL.bit.TRIGSEL = 1;
AdcRegs.ADCSOC9CTL.bit.TRIGSEL = 1;
AdcRegs.ADCSOC10CTL.bit.TRIGSEL = 1;
AdcRegs.ADCSOC11CTL.bit.TRIGSEL = 1;
AdcRegs.ADCSOC12CTL.bit.TRIGSEL = 1;
AdcRegs.ADCSOC13CTL.bit.TRIGSEL = 1;
AdcRegs.ADCSOC14CTL.bit.TRIGSEL = 1;
AdcRegs.ADCSOC15CTL.bit.TRIGSEL = 1;
//SOCx ɼ Ԥ Ƶ λ λ ڿ SOCx / ִ ڵij ȣ Сֵ Ϊ 6
AdcRegs.ADCSOC0CTL.bit.ACQPS = 6; //set SOC0 S/H Window to 7 ADC Clock Cycles, (6 ACQPS plus 1)
AdcRegs.ADCSOC1CTL.bit.ACQPS = 6; //set SOC1 S/H Window to 7 ADC Clock Cycles, (6 ACQPS plus 1)
AdcRegs.ADCSOC2CTL.bit.ACQPS = 6; //set SOC1 S/H Window to 7 ADC Clock Cycles, (6 ACQPS plus 1)
AdcRegs.ADCSOC3CTL.bit.ACQPS = 6; //set SOC1 S/H Window to 7 ADC Clock Cycles, (6 ACQPS plus 1)
AdcRegs.ADCSOC4CTL.bit.ACQPS = 6;
AdcRegs.ADCSOC5CTL.bit.ACQPS = 6;
AdcRegs.ADCSOC6CTL.bit.ACQPS = 6;
AdcRegs.ADCSOC7CTL.bit.ACQPS = 6;
AdcRegs.ADCSOC8CTL.bit.ACQPS = 6;
AdcRegs.ADCSOC9CTL.bit.ACQPS = 6;
AdcRegs.ADCSOC10CTL.bit.ACQPS = 6;
AdcRegs.ADCSOC11CTL.bit.ACQPS = 6;
AdcRegs.ADCSOC12CTL.bit.ACQPS = 6;
AdcRegs.ADCSOC13CTL.bit.ACQPS = 6;
AdcRegs.ADCSOC14CTL.bit.ACQPS = 6;
AdcRegs.ADCSOC15CTL.bit.ACQPS = 6;
EDIS;
EALLOW;
AdcRegs.ADCSOCFRC1.all=0xffff; // ǿ ƴ ʹ
AdcRegs.ADCINTSOCSEL1.all=0x5555; // Ӧ Ҫ С
// AdcRegs.ADCINTSOCSEL2.all=0x5555;
EDIS;
}

这是我的ADC配置，没有使用PWM触发，是在配置下图EPWM时钟时，如果把ADC配置放到下图后面就会导致ADC的值一直为0,。

你好，我也做过ADC初始化程序，我看你的ADC触发采用的是定时器触发，和我的一样，我可以发给你我的看看

我也是定时器触发ADC采样，我可以发给你看看

我也是定时器触发ADC采样，我可以发给你看看