TI中文支持网请问如何 配置 pwm 中断 采集16路ad 为什么只能出adca0-8 而adcb0-8不能采集 ？
Johnson Chen1：
楼主最好详细说明是使用哪一颗芯片，ADC死如何配置的，采样16路ADC肯定是可以的
请问如何 配置 pwm 中断 采集16路ad 为什么只能出adca0-8 而adcb0-8不能采集 ？
haha1981：
回复 Johnson Chen1:
void InitAdc(void){ extern void DSP28x_usDelay(Uint32 Count);
EALLOW; SysCtrlRegs.PCLKCR0.bit.ADCENCLK = 1; ADC_cal(); EDIS;
AdcRegs.ADCTRL3.all = 0x00E0; // Power up bandgap/reference/ADC circuits DELAY_US(ADC_usDELAY); // Delay before converting ADC channels
AdcRegs.ADCTRL1.bit.ACQ_PS = ADC_SHCLK; // Sequential mode: Sample rate = 1/[(2+ACQ_PS)*ADC clock in ns] // = 1/(3*40ns) =8.3MHz (for 150 MHz SYSCLKOUT) // = 1/(3*80ns) =4.17MHz (for 100 MHz SYSCLKOUT) // If Simultaneous mode enabled: Sample rate = 1/[(3+ACQ_PS)*ADC clock in ns] AdcRegs.ADCTRL3.bit.ADCCLKPS = ADC_CKPS; AdcRegs.ADCTRL1.bit.SEQ_CASC = 1; // 1 Cascaded mode
AdcRegs.ADCTRL1.bit.CONT_RUN = 1; // Setup continuous run
AdcRegs.ADCTRL1.bit.SEQ_OVRD = 1; // Enable Sequencer override feature
AdcRegs.ADCMAXCONV.all = 0x000F; // Setup 2 conv's on SEQ1 AdcRegs.ADCCHSELSEQ1.bit.CONV00 = 0x0; // Setup ADCINA3 as 1st SEQ1 conv. AdcRegs.ADCCHSELSEQ1.bit.CONV01 = 0x1; // Setup ADCINA2 as 2nd SEQ1 conv. AdcRegs.ADCCHSELSEQ1.bit.CONV02 = 0x2; // Setup ADCINA2 as 2nd SEQ1 conv. AdcRegs.ADCCHSELSEQ1.bit.CONV03 = 0x3; // Setup ADCINA3 as 1st SEQ1 conv. AdcRegs.ADCCHSELSEQ2.bit.CONV04 = 0x4; // Setup ADCINA2 as 2nd SEQ1 conv. AdcRegs.ADCCHSELSEQ2.bit.CONV05 = 0x5; // Setup ADCINA2 as 2nd SEQ1 conv. AdcRegs.ADCCHSELSEQ2.bit.CONV06 = 0x6; // Setup ADCINA2 as 2nd SEQ1 conv. AdcRegs.ADCCHSELSEQ2.bit.CONV07 = 0x7; // Setup ADCINA3 as 1st SEQ1 conv. AdcRegs.ADCCHSELSEQ3.bit.CONV08 = 0x8; // Setup ADCINA2 as 2nd SEQ1 conv. AdcRegs.ADCCHSELSEQ3.bit.CONV09 = 0x9; // Setup ADCINA2 as 2nd SEQ1 conv. AdcRegs.ADCCHSELSEQ3.bit.CONV10 = 0xA; // Setup ADCINA2 as 2nd SEQ1 conv. AdcRegs.ADCCHSELSEQ3.bit.CONV11 = 0xB; // Setup ADCINA3 as 1st SEQ1 conv. AdcRegs.ADCCHSELSEQ4.bit.CONV12 = 0xC; // Setup ADCINA2 as 2nd SEQ1 conv. AdcRegs.ADCCHSELSEQ4.bit.CONV13 = 0xD; // Setup ADCINA2 as 2nd SEQ1 conv. AdcRegs.ADCCHSELSEQ4.bit.CONV14 = 0xE; // Setup ADCINA2 as 2nd SEQ1 conv. AdcRegs.ADCCHSELSEQ4.bit.CONV15 = 0xF; // Setup ADCINA2 as 2nd SEQ1 conv. AdcRegs.ADCTRL2.bit.EPWM_SOCA_SEQ1 = 1;// Enable SOCA from ePWM to start SEQ1 AdcRegs.ADCTRL2.bit.INT_ENA_SEQ1 = 1;
}
InitAdc();
EPwm1Regs.ETSEL.bit.SOCAEN = 1; EPwm1Regs.ETSEL.bit.SOCASEL = 0x5; EPwm1Regs.ETPS.bit.SOCAPRD = 1;
PieCtrlRegs.PIEIER1.bit.INTx6 = 1; PieCtrlRegs.PIEIER1.bit.INTx7 = 1; IER |= M_INT1; // Enable CPU Interrupt 1 EINT; // Enable Global interrupt INTM ERTM; // Enable Global realtime interrupt DBGM
EPwm1Regs.ETSEL.bit.INTSEL = 4; EPwm1Regs.ETSEL.bit.INTEN = 1; EPwm1Regs.ETPS.bit.INTPRD = 0x1;
是我的配置 adca1-8能正常采集 adcb1-8不能正常采集 我用soca去触发 然后中断里面去采集ad值，
请问如何 配置 pwm 中断 采集16路ad 为什么只能出adca0-8 而adcb0-8不能采集 ？
haha1981：
回复 haha1981:
28335 芯片
请问如何 配置 pwm 中断 采集16路ad 为什么只能出adca0-8 而adcb0-8不能采集 ？
Johnson Chen1：
回复 haha1981:
如果将通道按下面配置可以采样到ADCINB0-B7信号吗？
你所说的采样不到信号是指采样值不对，还是指CPU根本就只采样了8通道，而剩下的8通道根本没有采？
AdcRegs.ADCCHSELSEQ1.bit.CONV00 = 0x0; // Setup ADCINA3 as 1st SEQ1 conv. AdcRegs.ADCCHSELSEQ1.bit.CONV01 = 0x8; // Setup ADCINA2 as 2nd SEQ1 conv. AdcRegs.ADCCHSELSEQ1.bit.CONV02 = 0x9; // Setup ADCINA2 as 2nd SEQ1 conv. AdcRegs.ADCCHSELSEQ1.bit.CONV03 = 0xA; // Setup ADCINA3 as 1st SEQ1 conv. AdcRegs.ADCCHSELSEQ2.bit.CONV04 = 0xB; // Setup ADCINA2 as 2nd SEQ1 conv. AdcRegs.ADCCHSELSEQ2.bit.CONV05 = 0xC; // Setup ADCINA2 as 2nd SEQ1 conv. AdcRegs.ADCCHSELSEQ2.bit.CONV06 = 0xD // Setup ADCINA2 as 2nd SEQ1 conv. AdcRegs.ADCCHSELSEQ2.bit.CONV07 = 0xE; // Setup ADCINA3 as 1st SEQ1 conv. AdcRegs.ADCCHSELSEQ3.bit.CONV08 = 0xF; // Setup ADCINA2 as 2nd SEQ1 conv. AdcRegs.ADCCHSELSEQ3.bit.CONV09 = 0x9; // Setup ADCINA2 as 2nd SEQ1 conv. AdcRegs.ADCCHSELSEQ3.bit.CONV10 = 0xA; // Setup ADCINA2 as 2nd SEQ1 conv. AdcRegs.ADCCHSELSEQ3.bit.CONV11 = 0xB; // Setup ADCINA3 as 1st SEQ1 conv. AdcRegs.ADCCHSELSEQ4.bit.CONV12 = 0xC; // Setup ADCINA2 as 2nd SEQ1 conv. AdcRegs.ADCCHSELSEQ4.bit.CONV13 = 0xD; // Setup ADCINA2 as 2nd SEQ1 conv. AdcRegs.ADCCHSELSEQ4.bit.CONV14 = 0xE; // Setup ADCINA2 as 2nd SEQ1 conv. AdcRegs.ADCCHSELSEQ4.bit.CONV15 = 0xF; // Setup ADCINA2 as 2nd SEQ1 conv.
请问如何 配置 pwm 中断 采集16路ad 为什么只能出adca0-8 而adcb0-8不能采集 ？
Peizhong Zhang1：
回复 Johnson Chen1:
采用哪块AD芯片可以实现16路AD并行采集，可以有不通过FPGA连到C6678的方法吗？
