hello ：NXP Employee
I need to consult you about the configuration of ADC_ETC. Now I want to configure an ADC to detect the battery voltage. I use RT1176 microcontroller, and the pin I use is GPIO_AD_34(J16), which has many reuse functions. Now I use the route IOMUXC_GPIO_AD_34_XBAR1_INOUT18, and enable the related configuration, but I find that it is possible to enter ADC interrupt, but read the data is always 0, so I suspect that there is something wrong with my configuration, but I can't find it, you can help me to let me know where the configuration is wrong. Nearby will give me my ADC
Here is my code：
#define DEMO_ADC_BASE LPADC1
#define DEMO_ADC_USER_CHANNEL 0U
#define DEMO_ADC_USER_CMDID 1U
#define DEMO_ADC_CHANNEL_GROUP 0U
#define DEMO_ADC_ETC_BASE ADC_ETC
#define DEMO_ADC_ETC_TRIGGER_GROUP 3U
#define DEMO_ADC_ETC_CHANNEL 1U
#define DEMO_ADC_ETC_DONE0_Handler ADC_ETC_IRQ0_IRQHandler
void ADC_ETC_Configuration(void)
{
adc_etc_config_t adcEtcConfig;
adc_etc_trigger_config_t adcEtcTriggerConfig;
adc_etc_trigger_chain_config_t adcEtcTriggerChainConfig;
/* Initialize the ADC_ETC. */
ADC_ETC_GetDefaultConfig(&adcEtcConfig);
adcEtcConfig.XBARtriggerMask = 0x08U; /* Enable the external XBAR trigger3. */
ADC_ETC_Init(DEMO_ADC_ETC_BASE, &adcEtcConfig);
/* Set the external XBAR trigger0 configuration. */
adcEtcTriggerConfig.enableSyncMode = false;
adcEtcTriggerConfig.enableSWTriggerMode = true;
adcEtcTriggerConfig.triggerChainLength = 0U; /* Chain length 1. */
adcEtcTriggerConfig.triggerPriority = 0U;
adcEtcTriggerConfig.sampleIntervalDelay = 0U;
adcEtcTriggerConfig.initialDelay = 0U;
ADC_ETC_SetTriggerConfig(DEMO_ADC_ETC_BASE, DEMO_ADC_ETC_TRIGGER_GROUP, &adcEtcTriggerConfig);
/* Set the external XBAR trigger0 chain0 configuration. */
adcEtcTriggerChainConfig.enableB2BMode = false;
adcEtcTriggerChainConfig.ADCHCRegisterSelect = 1U << DEMO_ADC_CHANNEL_GROUP; /* Select ADC_HC0 register to trigger. */
adcEtcTriggerChainConfig.ADCChannelSelect = DEMO_ADC_ETC_CHANNEL; /* ADC_HC0 will be triggered to sample Corresponding channel. */
adcEtcTriggerChainConfig.InterruptEnable = kADC_ETC_Done0InterruptEnable; /* Enable the Done0 interrupt. */
#if defined(FSL_FEATURE_ADC_ETC_HAS_TRIGm_CHAIN_a_b_IEn_EN) && FSL_FEATURE_ADC_ETC_HAS_TRIGm_CHAIN_a_b_IEn_EN
adcEtcTriggerChainConfig.enableIrq = true; /* Enable the IRQ. */
#endif /* FSL_FEATURE_ADC_ETC_HAS_TRIGm_CHAIN_a_b_IEn_EN */
/* Configure the trigger group chain 0. */
ADC_ETC_SetTriggerChainConfig(DEMO_ADC_ETC_BASE, DEMO_ADC_ETC_TRIGGER_GROUP, 0U, &adcEtcTriggerChainConfig);
}
void LPADC_Configuration(void)
{
lpadc_config_t lpadcConfig;
lpadc_conv_command_config_t lpadcCommandConfig;
lpadc_conv_trigger_config_t lpadcTriggerConfig;
/* Initialize the ADC module. */
LPADC_GetDefaultConfig(&lpadcConfig);
LPADC_Init(DEMO_ADC_BASE, &lpadcConfig);
#if (defined(FSL_FEATURE_LPADC_HAS_CFG_CALOFS) && FSL_FEATURE_LPADC_HAS_CFG_CALOFS)
/* Do offset calibration. */
LPADC_DoOffsetCalibration(DEMO_ADC_BASE, SystemCoreClock);
#endif /* FSL_FEATURE_LPADC_HAS_CFG_CALOFS */
/* Set conversion CMD configuration. */
LPADC_GetDefaultConvCommandConfig(&lpadcCommandConfig);
lpadcCommandConfig.channelNumber = DEMO_ADC_USER_CHANNEL;
LPADC_SetConvCommandConfig(DEMO_ADC_BASE, DEMO_ADC_USER_CMDID, &lpadcCommandConfig);
/* Set trigger configuration. */
LPADC_GetDefaultConvTriggerConfig(&lpadcTriggerConfig);
lpadcTriggerConfig.targetCommandId = DEMO_ADC_USER_CMDID;
lpadcTriggerConfig.enableHardwareTrigger = true;
LPADC_SetConvTriggerConfig(DEMO_ADC_BASE, 0U, &lpadcTriggerConfig);
}
void DEMO_ADC_ETC_DONE0_Handler(void)
{
ADC_ETC_ClearInterruptStatusFlags(DEMO_ADC_ETC_BASE, kADC_ETC_Trg3TriggerSource, kADC_ETC_Done0StatusFlagMask);
g_AdcConversionDoneFlag = true;
/* Get result from the trigger source chain 0. */
g_AdcConversionValue = ADC_ETC_GetADCConversionValue(DEMO_ADC_ETC_BASE, DEMO_ADC_ETC_TRIGGER_GROUP, 1U);
__DSB();
}
while (1)
{
g_AdcConversionDoneFlag = false;
PRINTF("Press any key to get user channel's ADC value.\r\n");
GETCHAR();
ADC_ETC_DoSoftwareTrigger(DEMO_ADC_ETC_BASE, DEMO_ADC_ETC_TRIGGER_GROUP); /* Do software XBAR trigger3. */
while (!g_AdcConversionDoneFlag)
{
}
PRINTF("ADC conversion value is %d\r\n", g_AdcConversionValue);
}
