CHANNEL3的ADC值为始终为4095的原因？

Hi：NXP  TechSupport，我有类似的问题，我用了LPADC模块的ADC1 [N13] GPIO_AD_06 CHANNEL0和[P17] GPIO_AD_12 CHANNEL3，发现CHANNEL0的ADC值是正确的，CHANNEL3的ADC值为始终为 4095。但我使用的是 SDK_2_12_1_MIMXRT1170-EVK.zip SDK，所以我认为我的配置可能有问题。你能帮我查一下吗

这是我的配置

const lpadc_config_t LPADC1_config = {
.enableInDozeMode = true,
.enableAnalogPreliminary = false,
.powerUpDelay = 0x80UL,
.referenceVoltageSource = kLPADC_ReferenceVoltageAlt2,
.powerLevelMode = kLPADC_PowerLevelAlt1,
.triggerPriorityPolicy = kLPADC_TriggerPriorityPreemptimmediately,
.enableConvPause = false,
.convPauseDelay = 0UL,
.FIFOWatermark = 0UL,
};
lpadc_conv_command_config_t LPADC1_commandsConfig[2] = {
{
.sampleScaleMode = kLPADC_SampleFullScale，
.sampleChannelMode = kLPADC_SampleChannelSingleEndSideA，
.channelNumber = 0U，
.chainedNextCommandNumber = 2，
.enableAutoChannelIncrement = false，
.loopCount = 0UL
.hardwareAverageMode = kLPADC_HardwareAverageCount1,
.sampleTimeMode = kLPADC_SampleTimeADCK3,
.hardwareCompareMode = kLPADC_HardwareCompareDisabled,
.hardwareCompareValueHigh = 0UL,
.hardwareCompareValueLow = 0UL,
},
{
.sampleScaleMode = kLPADC_SampleFullScale,
.sampleChannelMode = kLPADC_SampleChannelSingleEndSideA,
.channelNumber = 3U,
.chainedNextCommandNumber = 0,
.enableAutoChannelIncrement =假，
.loopCount = 0UL，
.hardwareAverageMode = kLPADC_HardwareAverageCount1，
.sampleTimeMode = kLPADC_SampleTimeADCK3，
.hardwareCompareMode = kLPADC_HardwareCompareDisabled，
.hardwareCompareValueHigh = 0UL，
.hardwareCompareValueLow = 0UL，
}
};
lpadc_conv_trigger_config_t LPADC1_triggersConfig[2] = {
{
.targetCommandId = 1,
.delayPower = 0UL,
.priority = 1,
.enableHardwareTrigger = true
},
{
.targetCommandId = 2,
.delayPower = 0UL,
.priority = 1,
.enableHardwareTrigger = false
}
};
static void LPADC1_init(void) {
/* 初始化 LPADC 转换器 */
LPADC_Init(LPADC1_PERIPHERAL, &LPADC1_config);
/* 配置转换命令 1。 */
LPADC_SetConvCommandConfig(LPADC1_PERIPHERAL, 1, &LPADC1_commandsConfig[0]);
/* 配置转换命令 2。 */
LPADC_SetConvCommandConfig(LPADC1_PERIPHERAL, 2, &LPADC1_commandsConfig[1]);
/* 配置触发器 0。 */
LPADC_SetConvTriggerConfig(LPADC1_PERIPHERAL, 0, &LPADC1_triggersConfig[0]);
/* 配置触发器 1。 */
LPADC_SetConvTriggerConfig(LPADC1_PERIPHERAL, 1, &LPADC1_triggersConfig[1]);
/* NVIC 中的中断向量 ADC1_IRQn 优先级设置。*/
NVIC_SetPriority(LPADC1_IRQN, LPADC1_IRQ_PRIORITY);
/* 启用来自 LPADC 的中断 */
LPADC_EnableInterrupts(LPADC1_PERIPHERAL, (kLPADC_FIFOWatermarkInterruptEnable));
/* 在 NVIC 中启用中断 ADC1_IRQn 请求。*/
EnableIRQ(LPADC1_IRQN);
}

void DEMO_LPADC_IRQ_HANDLER_FUNC(void)
{
#if 0
ADC_ETC_ClearInterruptStatusFlags(DEMO_ADC_ETC_BASE, kADC_ETC_Trg0TriggerSource, kADC_ETC_Done0StatusFlagMask);
g_AdcConversionDoneFlag = true;
/* 从触发源链 0 中获取结果 */
g_AdcConversionValue[0] = ADC_ETC_GetADCConversionValue(DEMO_ADC_ETC_BASE, DEMO_ADC_ETC_TRIGGER_GROUP, 0U);
g_AdcConversionValue[1] = ADC_ETC_GetADCConversionValue(DEMO_ADC_ETC_BASE, DEMO_ADC_ETC_TRIGGER_GROUP, 3U);
__DSB();
#else
g_LpadcInterruptCounter++;
#if (defined(FSL_FEATURE_LPADC_FIFO_COUNT) && (FSL_FEATURE_LPADC_FIFO_COUNT == 2U))
如果 (LPADC_GetConvResult(DEMO_LPADC_BASE, &g_LpadcResultConfigStruct, 0U))
#else
如果 (LPADC_GetConvResult(DEMO_LPADC_BASE, &g_LpadcResultConfigStruct))
#endif /* FSL_FEATURE_LPADC_FIFO_COUNT */
{
g_LpadcConversionCompletedFlag = true;
}
SDK_ISR_EXIT_BARRIER;
#endif
}
int main(void)
{
uint32_t pwmVal = 4;
/* 电路板引脚、时钟、调试控制台初始化 */
BOARD_ConfigMPU();
BOARD_InitPins();
BOARD_BootClockRUN();
BOARD_InitBootPeripherals();
BOARD_InitDebugConsole();
/* 向终端打印一条注释。*/
而 (1)
{
SDK_DelayAtLeastUs(100000, SDK_DEVICE_MAXIMUM_CPU_CLOCK_FREQUENCY);
LPADC_DoSoftwareTrigger(DEMO_LPADC_BASE, 1U); /* 1U 是 trigger0 掩码。*/
}
}