关于F28M35的ADC的中断问题？

anfu

关于F28M35的ADC的中断问题？ [复制链接]

     最近在用TI的Concerto系列F28M35H52C 做一个模拟信号采集的项目。在ADC方面遇到一些问题。不知是否方便予以解答。前两天在deyisupport上发过帖子，但没人回答，故现在想你求援。

     问题描述：在我的设计中，ADC1/ADC2采用overlap、依次顺序进行转换，各SOC0--SOC15均采用定时器TINT1的100us定时去触发，当SOC15转换完毕后去触发ADCINT1(ADC2的SOC15触发ADCINT2)，ADCINT1/ADCINT2在PIE中不允许中断，通过查询中断标记位判断16个SOC转换是否完成。在程序中在各步加设GIO置1或0的方式，通过示波器观察各步的执行时间和状态，发现采用查询ADCINT1中断标记位时，从ADC启动（通过TINT1启动）到ADC1 的中断标记置位时的时间间隔只有惊人的0.8us这么短，那可是16个SOC的转换啊！根据TI的SPRUH22F中P900到的参数，应该是543ns X 16=8.5us左右，差距是10倍左右！而采用查询ADCCTL1.bit.ADCBSY和ADCCTL1.bit.ADCBSYCHN方式，测得到SOC15转换完毕的时间大约8us，还算靠谱！ 通过设置断点，发现在中断标记为置位时，ADCBSY=1，且ADCBSYCHN=2，说明在SOC1转换完毕时，就触发了中断！但在初始化代码中，明明是设置的SOC15。

Adc1Regs.INTSEL1N2.bit.INT1SEL = 15;                         // setup ADC1 EOC15 to trigger ADCINT1

不知是什么原因。

我的问题就是：如何通过查询相关的ADCINT1中断标记位，判断16个SOC转换是否完成？

ADCINT1/ADCINT2和TINT1均允许中断，但在PIE中却不允许中断，通过查询方式进行判断。

以下是相关的程序代码，请帮忙看看是否有问题！谢谢！

由于自己设计的硬件还在打样中。所以目前硬件用的还是Concerto F28M35xx controlCARD。软件是在\ti\controlSUITE\device_support\f28m36x\v206修改的。

EALLOW;

Adc1Regs.ADCCTL1.bit.ADCBGPWD = 1;     // Power ADC1 BG, Bandgap circuit(带隙基准电路) 上电, 见TRM P911 ADCCTL1
Adc1Regs.ADCCTL1.bit.ADCREFPWD = 1;   // Power reference,Reference buffers circuit power down
Adc1Regs.ADCCTL1.bit.ADCPWDN = 1;       // Power ADC1, ADC power down
Adc1Regs.ADCCTL1.bit.ADCENABLE = 1;    // Enable ADC1
Adc1Regs.ADCCTL1.bit.ADCREFSEL = 0;    // Select interal BG, Internal/external reference select

Adc1Regs.ADCCTL2.bit.ADCNONOVERLAP = 0;             // 0--Enable overlap mode
Adc1Regs.ADCCTL1.bit.INTPULSEPOS = 1;                   // ADCINT1 trips after AdcResults latch
Adc1Regs.INTSEL1N2.bit.INT1E = 1;                               // Enabled ADCINT1
Adc1Regs.INTSEL1N2.bit.INT1CONT = 0;                       // Disable ADCINT1 Continuous mode
Adc1Regs.INTSEL1N2.bit.INT1SEL = 15;                         // setup ADC1 EOC15 to trigger ADCINT1
Adc1Regs.SOCPRICTL.bit.SOCPRIORITY = 15;             // 15: SOC0-SOC14 are high priority, SOC15 is in round robin mode.

AnalogSysctrlRegs.TRIG1SEL.all     = 2;     // Assigning TINT1 (CPU Timer 1) to ADC TRIGGER 1 of the ADC1 and ADC2 module

Adc1Regs.ADCSOC0CTL.bit.CHSEL = 0; // set SOC0 channel select to ADC1A0
Adc1Regs.ADCSOC1CTL.bit.CHSEL = 8; // set SOC1 channel select to ADC1B0
Adc1Regs.ADCSOC2CTL.bit.CHSEL = 4; // set SOC2 channel select to ADC1A4
Adc1Regs.ADCSOC3CTL.bit.CHSEL = 12; // set SOC3 channel select to ADC1B4
Adc1Regs.ADCSOC4CTL.bit.CHSEL = 0; // set SOC4 channel select to ADC1A0
Adc1Regs.ADCSOC5CTL.bit.CHSEL = 8; // set SOC5 channel select to ADC1B0
Adc1Regs.ADCSOC6CTL.bit.CHSEL = 4; // set SOC6 channel select to ADC1A4
Adc1Regs.ADCSOC7CTL.bit.CHSEL = 12; // set SOC7 channel select to ADC1B4
Adc1Regs.ADCSOC8CTL.bit.CHSEL = 0; // set SOC8 channel select to ADC1A0
Adc1Regs.ADCSOC9CTL.bit.CHSEL = 8; // set SOC9 channel select to ADC1B0
Adc1Regs.ADCSOC10CTL.bit.CHSEL = 4; // set SOC10 channel select to ADC1A4
Adc1Regs.ADCSOC11CTL.bit.CHSEL = 12; // set SOC11 channel select to ADC1B4
Adc1Regs.ADCSOC12CTL.bit.CHSEL = 0; // set SOC12 channel select to ADC1A0
Adc1Regs.ADCSOC13CTL.bit.CHSEL = 8; // set SOC13 channel select to ADC1B0
Adc1Regs.ADCSOC14CTL.bit.CHSEL = 4; // set SOC14 channel select to ADC1A4
Adc1Regs.ADCSOC15CTL.bit.CHSEL = 12; // set SOC15 channel select to ADC1B4

Adc1Regs.ADCSOC0CTL.bit.TRIGSEL = 5; // Set SOC0 start trigger to ADC Trigger 1 of the ADC
Adc1Regs.ADCSOC1CTL.bit.TRIGSEL = 5; // set SOC1 start trigger to ADC Trigger 1 of the ADC
Adc1Regs.ADCSOC2CTL.bit.TRIGSEL = 5; // Set SOC2 start trigger to ADC Trigger 1 of the ADC
Adc1Regs.ADCSOC3CTL.bit.TRIGSEL = 5; // set SOC3 start trigger to ADC Trigger 1 of the ADC
Adc1Regs.ADCSOC4CTL.bit.TRIGSEL = 5; // Set SOC4 start trigger to ADC Trigger 1 of the ADC
Adc1Regs.ADCSOC5CTL.bit.TRIGSEL = 5; // set SOC5 start trigger to ADC Trigger 1 of the ADC
Adc1Regs.ADCSOC6CTL.bit.TRIGSEL = 5; // Set SOC6 start trigger to ADC Trigger 1 of the ADC
Adc1Regs.ADCSOC7CTL.bit.TRIGSEL = 5; // set SOC7 start trigger to ADC Trigger 1 of the ADC
Adc1Regs.ADCSOC8CTL.bit.TRIGSEL = 5; // Set SOC8 start trigger to ADC Trigger 1 of the ADC
Adc1Regs.ADCSOC9CTL.bit.TRIGSEL = 5; // set SOC9 start trigger to ADC Trigger 1 of the ADC
Adc1Regs.ADCSOC10CTL.bit.TRIGSEL = 5; // Set SOC10 start trigger to ADC Trigger 1 of the ADC
Adc1Regs.ADCSOC11CTL.bit.TRIGSEL = 5; // set SOC11 start trigger to ADC Trigger 1 of the ADC
Adc1Regs.ADCSOC12CTL.bit.TRIGSEL = 5; // Set SOC12 start trigger to ADC Trigger 1 of the ADC
Adc1Regs.ADCSOC13CTL.bit.TRIGSEL = 5; // set SOC13 start trigger to ADC Trigger 1 of the ADC
Adc1Regs.ADCSOC14CTL.bit.TRIGSEL = 5; // Set SOC14 start trigger to ADC Trigger 1 of the ADC
Adc1Regs.ADCSOC15CTL.bit.TRIGSEL = 5; // set SOC15 start trigger to ADC Trigger 1 of the ADC

Adc1Regs.ADCSOC0CTL.bit.ACQPS = 6; // set SOC0 S/H Window to 7 ADC Clock Cycles, (6 ACQPS plus 1)
Adc1Regs.ADCSOC1CTL.bit.ACQPS = 6; // set SOC1 S/H Window to 7 ADC Clock Cycles, (6 ACQPS plus 1)
Adc1Regs.ADCSOC2CTL.bit.ACQPS = 6; // set SOC2 S/H Window to 7 ADC Clock Cycles, (6 ACQPS plus 1)
Adc1Regs.ADCSOC3CTL.bit.ACQPS = 6; // set SOC3 S/H Window to 7 ADC Clock Cycles, (6 ACQPS plus 1)
Adc1Regs.ADCSOC4CTL.bit.ACQPS = 6; // set SOC4 S/H Window to 7 ADC Clock Cycles, (6 ACQPS plus 1)
Adc1Regs.ADCSOC5CTL.bit.ACQPS = 6; // set SOC5 S/H Window to 7 ADC Clock Cycles, (6 ACQPS plus 1)
Adc1Regs.ADCSOC6CTL.bit.ACQPS = 6; // set SOC6 S/H Window to 7 ADC Clock Cycles, (6 ACQPS plus 1)
Adc1Regs.ADCSOC7CTL.bit.ACQPS = 6; // set SOC7 S/H Window to 7 ADC Clock Cycles, (6 ACQPS plus 1)
Adc1Regs.ADCSOC8CTL.bit.ACQPS = 6; // set SOC8 S/H Window to 7 ADC Clock Cycles, (6 ACQPS plus 1)
Adc1Regs.ADCSOC9CTL.bit.ACQPS = 6; // set SOC9 S/H Window to 7 ADC Clock Cycles, (6 ACQPS plus 1)
Adc1Regs.ADCSOC10CTL.bit.ACQPS = 6; // set SOC10 S/H Window to 7 ADC Clock Cycles, (6 ACQPS plus 1)
Adc1Regs.ADCSOC11CTL.bit.ACQPS = 6; // set SOC11 S/H Window to 7 ADC Clock Cycles, (6 ACQPS plus 1)
Adc1Regs.ADCSOC12CTL.bit.ACQPS = 6; // set SOC12 S/H Window to 7 ADC Clock Cycles, (6 ACQPS plus 1)
Adc1Regs.ADCSOC13CTL.bit.ACQPS = 6; // set SOC13 S/H Window to 7 ADC Clock Cycles, (6 ACQPS plus 1)
Adc1Regs.ADCSOC14CTL.bit.ACQPS = 6; // set SOC14 S/H Window to 7 ADC Clock Cycles, (6 ACQPS plus 1)
Adc1Regs.ADCSOC15CTL.bit.ACQPS = 6; // set SOC15 S/H Window to 7 ADC Clock Cycles, (6 ACQPS plus 1)

EDIS;

while(CpuTimer1Regs.TCR.bit.TIF==0);                   //This flag gets set when the CPU-timer decrements to zero, 100us

CpuTimer1Regs.TCR.bit.TIF = 1;                             // Writing a 1 to this bit clears the flag

POINTPULSE_DAT_REG = 1;                                // GPIO31-- point pulse, point sanmple strat

//while((Adc1Regs.ADCCTL1.bit.ADCBSY !=0) ||(Adc1Regs.ADCCTL1.bit.ADCBSYCHN != 0x0f));

                                                           // 判断BUSY是否空闲，且最后一个通道是否是SOC15

while(Adc1Regs.ADCINTFLG.bit.ADCINT1==0);                     // 等待ADCINT1信号产生(由SOC15转换完毕产生)
Adc1Regs.ADCINTFLGCLR.bit.ADCINT1 = 1;                        // 清除ADCINT1中断信号

POINTPULSE_DAT_REG = 0;                                                // high level width: 16 socs total time(include: Sample time + Conversion Time)

以上问题，希望各位大牛们解答！