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器件型号：AM2634 主题中讨论的其他器件： SysConfig、 LP-AM263
HII、
我正在采样 ADC 正弦波( soc 来自软件)的振幅(高=1V 和低=0V)频率为1MHz,但我得到的数字值在2300和2450之间。 我应该从0开始到某个值？
什么 可能是错误？？
可使用手册中提到的多种不同方式来触发 ADC：
ePWM 只是一种选择。 我认为您的示例的自述文件已经足够清晰了。
在本例中,采样率是 调用 ADC_FORCESOC ()的速率:
当您说"修复它"时、意味着您希望实现4MSPS 的采样率、以便可靠地重建1MHz 正弦波？
当您说"我正在获取数据"时、您是如何查看此数据的？
如果您只是使用上述代码,那么采样率只与调用 ADC_FORCESOC()的速度一样快。 其中一个问题可能是 DebugP_LOG 进程非常慢，因此我认为 ADC_FORCESOC()的调用频率会很低。
注释掉 DebugP_log()，而是设置一个缓冲区来存储 ADC_readResult ()的返回值，但需要大量的 存储器。 然后使用 Graph 功能来绘制数据点：
很抱歉、我不是 TI 的技术支持人员、所以我承担不起在这上面花更多的时间。 希望 TI 将深入了解这一主题。
HII Fleenor,
不能插入电压缓冲器。
我使用的是 Tektronix 信号发生器、其型号为 AFG31000系列任意函数发生器。
https://www.tek.com/en/datasheet/arbitrary-function-generators
我在此附上了恒定振幅(振幅= 0.5V、偏移= 0.250V)和不同 ADC 转换频率的绘制图。
采样率设置为4MSPS、从 ePWM 触发 SOC 的频率设置为1MHz。
为什么频率增大时、ADC 捕获的值范围会减小。
我以20kHz 的频率接收50个样本、这意味着采样率=1MSPS (采样率受我们触发 ADC SOC 的频率影响)
5kHz 时的图形
10KHz 时的图形
20KHz 时的图形
50kHz 时的关系图
100KHz 时的图形
此图形显示为200kHz
400kHz 时的图形
HII Fleenor,
我使用的是 Sitara AM263x MCU、部件号：LP-AM263。
1)我检查了硬件,但没有 LPF 元素。
2)从前面的回复中可以看到1MHz 的样本数量是正确的( ADC 的 SOC 触发值设置为1MHz ),但问题是信号没有得到统一的采样。
在这里、我将输入波形的捕获图形 
以下是从函数发生器的"InstaView"技术获得的详细信息。
DHCP On CLOCK_REFERENCE Internal GPIB_ADDRESS 1.10000000000000000000e+01 GPIB_CONFIGURATION Talk/Listen LANGUAGE English SCREEN_SAVER Off CONTRAST 7.00000000000000000000e+01 CLICK_TONE On SOFT_KEYBOARD On BEEPER On POWER_ON Default BRIGHTNESS 1.00000000000000000000e+02 TRIGGER_SOURCE External TRIGGER_SLOPE Positive TRIGGER_INTERVAL 1.00000000000000002082e-03 TRIGGER_OUT Trigger TIMEZONE UTC+08:00 USB_ESER 0.00000000000000000000e+00 USB_SRER 0.00000000000000000000e+00 USB_QEN 0.00000000000000000000e+00 USB_OEN 0.00000000000000000000e+00 USB_PSC On GPIB_ESER 0.00000000000000000000e+00 GPIB_SRER 0.00000000000000000000e+00 GPIB_QEN 0.00000000000000000000e+00 GPIB_OEN 0.00000000000000000000e+00 GPIB_PSC On VXI11_ESER 0.00000000000000000000e+00 VXI11_SRER 0.00000000000000000000e+00 VXI11_QEN 0.00000000000000000000e+00 VXI11_OEN 0.00000000000000000000e+00 VXI11_PSC On BURST_COUNT1 5.00000000000000000000e+00 BURST_MODE1 Triggered FREQUENCY_CONCURRENT1 Off FUNCTION1 Sine FUNCTION_FILE1 "" VOLTAGE_CONCURRENT1 Off LOAD_IMPEDANCE1 5.00000000000000000000e+01 AMPLITUDE_UNIT1 Vpp AMPLITUDE_VPP1 5.00000000000000000000e-01 AMPLITUDE_VRMS1 1.76776695296636865429e-01 AMPLITUDE_DBM1 -2.04119982655924836479e+00 OFFSET1 2.50000000000000000000e-01 HIGH_LEVEL1 5.00000000000000000000e-01 LOW_LEVEL1 0.00000000000000000000e+00 AMPLITUDE_OR_LEVEL1 Amplitude HIGH_LIMIT1 2.50000000000000000000e+00 LOW_LIMIT1 -2.50000000000000000000e+00 INVERT1 Off NOISE_ADD1 Off NOISE_LEVEL1 1.00000000000000000000e+01 EXTERNAL_ADD1 Off PULSE_WIDTH1 5.00000000000000040902e-06 PULSE_DUTY1 5.00000000000000000000e+01 PULSE_WIDTH_OR_DUTY1 Duty PULSE_LEADING_EDGE1 2.00000000000000012456e-09 PULSE_TRAILING_EDGE1 2.00000000000000012456e-09 RAMP_SYMMETRY1 5.00000000000000000000e+01 NOISE_SIGMA1 2.00000000000000011102e-01 FREQUENCY1 1.00000000000000000000e+05 PERIOD1 1.00000000000000008180e-05 FREQUENCY_OR_PERIOD1 Frequency PHASE1 0.00000000000000000000e+00 LEAD_DELAY1 0.00000000000000000000e+00 PHASE_CONCURRENT1 Off RUN_MODE1 Continuous MODULATION_TYPE1 AM AM_SOURCE1 Internal AM_SHAPE1 Sine AM_SHAPE_FILE1 "" AM_FREQUENCY1 1.00000000000000000000e+04 AM_DEPTH1 5.00000000000000000000e+01 FM_SOURCE1 Internal FM_SHAPE1 Sine FM_SHAPE_FILE1 "" FM_FREQUENCY1 1.00000000000000000000e+04 FM_DEVIATION1 1.00000000000000000000e+06 PM_SOURCE1 Internal PM_SHAPE1 Sine PM_SHAPE_FILE1 "" PM_FREQUENCY1 1.00000000000000000000e+04 PM_DEVIATION1 9.00000000000000000000e+01 PWM_SOURCE1 Internal PWM_SHAPE1 Sine PWM_SHAPE_FILE1 "" PWM_FREQUENCY1 1.00000000000000000000e+04 PWM_DEVIATION1 5.00000000000000000000e+00 FSK_SOURCE1 Internal FSK_RATE1 5.00000000000000000000e+01 FSK_HOP_FREQUENCY1 1.00000000000000000000e+06 SWEEP_START1 1.00000000000000000000e+05 SWEEP_STOP1 1.00000000000000000000e+06 SWEEP_CENTER1 5.50000000000000000000e+05 SWEEP_SPAN1 9.00000000000000000000e+05 SWEEP_START_STOP_OR_CENTER_SPAN1 StartStop SWEEP_TIME1 1.00000000000000002082e-02 SWEEP_RETURN_TIME1 1.00000000000000002082e-03 SWEEP_HOLD_TIME1 0.00000000000000000000e+00 SWEEP_TYPE1 Linear SWEEP_MODE1 Repeat BURST_DELAY1 0.00000000000000000000e+00 BURST_IDLE_STATE1 StartPoint RTWM_CABLE_DELAY1 5.23999999999999927584e-09 BURST_COUNT2 5.00000000000000000000e+00 BURST_MODE2 Triggered FREQUENCY_CONCURRENT2 Off FUNCTION2 Sine FUNCTION_FILE2 "" VOLTAGE_CONCURRENT2 Off LOAD_IMPEDANCE2 5.00000000000000000000e+01 AMPLITUDE_UNIT2 Vpp AMPLITUDE_VPP2 1.00000000000000000000e+00 AMPLITUDE_VRMS2 3.53553390593273730858e-01 AMPLITUDE_DBM2 3.97940008672037537352e+00 OFFSET2 0.00000000000000000000e+00 HIGH_LEVEL2 5.00000000000000000000e-01 LOW_LEVEL2 -5.00000000000000000000e-01 AMPLITUDE_OR_LEVEL2 Amplitude HIGH_LIMIT2 2.50000000000000000000e+00 LOW_LIMIT2 -2.50000000000000000000e+00 INVERT2 Off NOISE_ADD2 Off NOISE_LEVEL2 1.00000000000000000000e+01 PULSE_WIDTH2 4.99999999999999977374e-07 PULSE_DUTY2 5.00000000000000000000e+01 PULSE_WIDTH_OR_DUTY2 Duty PULSE_LEADING_EDGE2 2.00000000000000012456e-09 PULSE_TRAILING_EDGE2 2.00000000000000012456e-09 RAMP_SYMMETRY2 5.00000000000000000000e+01 NOISE_SIGMA2 2.00000000000000011102e-01 FREQUENCY2 1.00000000000000000000e+06 PERIOD2 9.99999999999999954748e-07 FREQUENCY_OR_PERIOD2 Frequency PHASE2 0.00000000000000000000e+00 LEAD_DELAY2 0.00000000000000000000e+00 PHASE_CONCURRENT2 Off RUN_MODE2 Continuous MODULATION_TYPE2 AM AM_SOURCE2 Internal AM_SHAPE2 Sine AM_SHAPE_FILE2 "" AM_FREQUENCY2 1.00000000000000000000e+04 AM_DEPTH2 5.00000000000000000000e+01 FM_SOURCE2 Internal FM_SHAPE2 Sine FM_SHAPE_FILE2 "" FM_FREQUENCY2 1.00000000000000000000e+04 FM_DEVIATION2 1.00000000000000000000e+06 PM_SOURCE2 Internal PM_SHAPE2 Sine PM_SHAPE_FILE2 "" PM_FREQUENCY2 1.00000000000000000000e+04 PM_DEVIATION2 9.00000000000000000000e+01 PWM_SOURCE2 Internal PWM_SHAPE2 Sine PWM_SHAPE_FILE2 "" PWM_FREQUENCY2 1.00000000000000000000e+04 PWM_DEVIATION2 5.00000000000000000000e+00 FSK_SOURCE2 Internal FSK_RATE2 5.00000000000000000000e+01 FSK_HOP_FREQUENCY2 1.00000000000000000000e+06 SWEEP_START2 1.00000000000000000000e+05 SWEEP_STOP2 1.00000000000000000000e+06 SWEEP_CENTER2 5.50000000000000000000e+05 SWEEP_SPAN2 9.00000000000000000000e+05 SWEEP_START_STOP_OR_CENTER_SPAN2 StartStop SWEEP_TIME2 1.00000000000000002082e-02 SWEEP_RETURN_TIME2 1.00000000000000002082e-03 SWEEP_HOLD_TIME2 0.00000000000000000000e+00 SWEEP_TYPE2 Linear SWEEP_MODE2 Repeat BURST_DELAY2 0.00000000000000000000e+00 BURST_IDLE_STATE2 StartPoint RTWM_CABLE_DELAY2 0.00000000000000000000e+00
