RT052 (6) ADC

xutong

RT052 (6) ADC [Copy link]

The first thing to do is of course to add the header file!

//Step 1: Add adc header file #include "fsl_adc.h" // Step 2: Add adc's return value for printing volatile uint16_t ADC_Value;

Under the construction of the ADC initialization function

// Step 2: Create a new ADC initialization function void RT1052_ADC_Init(void) { adc_config_t adcConfigStruct; adc_channel_config_t adcChannelConfigStruct; /* * config->enableAsynchronousClockOutput = true; * config->enableOverWrite = false; * config->enableContinuousConversion = false; * config->enableHighSpeed = false; * config->enableLowPower = false; * config->enableLongSample = false; * config->referenceVoltageSource = kADC_ReferenceVoltageSourceVref; * config->samplePeriodMode = kADC_SamplePeriod2or12Clocks; * config->clockSource = kADC_ClockSourceAD; * config->clockDriver = kADC_ClockDriver1; * config->resolution = kADC_Resolution12Bit; */ ADC_GetDefaultConfig(&adcConfigStruct); //Maximum resolution 12bit only external reference //adcConfigStruct.referenceVoltageSource=kADC_ReferenceVoltageSourceAlt0; //Start continuous conversion mode adcConfigStruct.enableContinuousConversion=true; ADC_Init(ADC1, &adcConfigStruct); // Enable ADC interrupt EnableIRQ(ADC1_IRQn); // Enable ADC1 automatic calibration ADC_DoAutoCalibration(ADC1); //Disable hardware trigger ADC_EnableHardwareTrigger(ADC1, false); //Read channel 0 adcChannelConfigStruct.channelNumber = 0; adcChannelConfigStruct.enableInterruptOnConversionCompleted = true; // Channe_group 0 is used for software or hardware triggering ADC_SetChannelConfig(ADC1, 0u /*ADC_CHANNEL_GROUP*/, &adcChannelConfigStruct); }

It is relatively simple to enable the ADC interrupt here. Just use EnableIRQ(ADC1_IRQn);. There is this section in the official SDK of RT1052, but where can I find the name type of IRQn?

You can find it by searching for specific interrupt in MIMXRT1052.h. It should be noted that there is no description of ADC interrupt in SDK API Reference.

SDK_2_12_1_MIMXRT1052xxxxB\boards\evkbimxrt1050\driver_examples

Go to see his source code.

The ADC of RT1052 has automatic gain calibration.

Just use auto calibration before performing the conversion.

It also has an offset calibration function. The idea is that the KB value can be directly calibrated using this function.

A hardware comparator is integrated internally, and the 12-bit accuracy of the comparator is suitable for most occasions.

Anyway, it’s very good!

hustjtj0806

It seems that most chip companies' libraries are still standard libraries.

xutong

hustjtj0806 posted on 2022-12-7 12:03 It seems that the libraries of most chip companies are still the specifications of the standard library

Standardization can speed up development

秦天qintian0303

I also like the standard library, which is more flexible. Otherwise, it takes too much time to find it.

xutong

Qintianqintian0303 posted on 2022-12-9 13:34 I also like the standard library, which is more flexible. Otherwise, it will take too much time to find it

Yes, it's too troublesome to find it.