lpadc_high_sample_rate_sample_signal#
Overview#
This demo application demonstrates the use of the LPADC to sample the analog signal. In this demo, the ADC clock is set as the maximum frequency, users should input analog signals to the ADC channel, press any keys to trigger the ADC conversion. After sampling enough sample points, the ADC will be disabled and the sample data will be print via UART. Users can use some tools such as EXCEL to recover the input signal based on those printed data.
Supported Boards#
MIMXRT1170-EVKB
Hardware requirements
Mini/micro USB cable
MIMXRT1170-EVKB board
Personal Computer
Board settings
ADC1_IN0 is ADC input. Please sample voltage by J9-10 pin.
Prepare the Demo
Connect a USB cable between the host PC and the OpenSDA USB port on the target board.
Open a serial terminal with the following settings:
115200 baud rate
8 data bits
No parity
One stop bit
No flow control
Download the program to the target board.
Either press the reset button on your board or launch the debugger in your IDE to begin running the demo.
Running the demo
The log below shows the output of the lpadc sample rate count demo in the terminal window:
ADC High Sample Rate Demo: Sample Input Signal
Please input the analog signal to the ADC channel.
In order to recover the input signal as completely as possible,
please ensure that the frequency of the input signal is less than 1MHz
Please input any key to trigger ADC conversion.
After getting enough sample point, the ADC will be stopped and the sample point data will be printed via UART. Use some tools such as EXCEL to redraw the input signal based on those sample point data. Please note that the amplitude of the input analog signal should be less than 1.8V.
MIMXRT1160-EVK
Hardware requirements
Mini/micro USB cable
MIMXRT1160-EVK board
Personal Computer
Board settings
ADC1_IN0 is ADC input. Please sample voltage by J9-10 pin.
Prepare the Demo
Connect a USB cable between the host PC and the OpenSDA USB port on the target board.
Open a serial terminal with the following settings:
115200 baud rate
8 data bits
No parity
One stop bit
No flow control
Download the program to the target board.
Either press the reset button on your board or launch the debugger in your IDE to begin running the demo.
Running the demo
The log below shows the output of the lpadc sample rate count demo in the terminal window:
ADC High Sample Rate Demo: Sample Input Signal
Please input the analog signal to the ADC channel.
In order to recover the input signal as completely as possible,
please ensure that the frequency of the input signal is less than 1MHz
Please input any key to trigger ADC conversion.
After getting enough sample point, the ADC will be stopped and the sample point data will be printed via UART. Use some tools such as EXCEL to redraw the input signal based on those sample point data. Please note that the amplitude of the input analog signal should be less than 1.8V.
MIMXRT1180-EVK
Hardware requirements
Mini/micro USB cable
MIMXRT1180-EVK board
Personal Computer
Board settings
ADC1_IN1 is ADC input. Please sample voltage by J69-17 pin.
Prepare the Demo
Connect a USB cable between the host PC and the OpenSDA USB port on the target board.
Open a serial terminal with the following settings:
115200 baud rate
8 data bits
No parity
One stop bit
No flow control
Download the program to the target board.
Either press the reset button on your board or launch the debugger in your IDE to begin running the demo.
Running the demo
The log below shows the output of the lpadc sample rate count demo in the terminal window:
ADC High Sample Rate Demo: Sample Input Signal
Please input the analog signal to the ADC channel.
In order to recover the input signal as completely as possible,
please ensure that the frequency of the input signal is less than 1MHz
Please input any key to trigger ADC conversion.
After getting enough sample point, the ADC will be stopped and the sample point data will be printed via UART. Use some tools such as EXCEL to redraw the input signal based on those sample point data. Please note that the amplitude of the input analog signal should be less than 1.8V.
FRDM-IMXRT1186
Hardware requirements
Type-C USB cable
FRDM-IMXRT1186 board
Personal Computer
Board settings
Change Jumper J27 from 1-2 to 2-3. ADC1_IN1 is ADC input. Please sample voltage by J51-8 pin.
Prepare the Demo
Connect a USB cable between the host PC and the OpenSDA USB port on the target board.
Open a serial terminal with the following settings:
115200 baud rate
8 data bits
No parity
One stop bit
No flow control
Download the program to the target board.
Either press the reset button on your board or launch the debugger in your IDE to begin running the demo.
Running the demo
The log below shows the output of the lpadc sample rate count demo in the terminal window:
ADC High Sample Rate Demo: Sample Input Signal
Please input the analog signal to the ADC channel.
In order to recover the input signal as completely as possible,
please ensure that the frequency of the input signal is less than 1MHz
Please input any key to trigger ADC conversion.
After getting enough sample point, the ADC will be stopped and the sample point data will be printed via UART. Use some tools such as EXCEL to redraw the input signal based on those sample point data. Please note that the amplitude of the input analog signal should be less than 1.8V.
FRDM-IMXRT1152
Hardware requirements
Type-C USB cable
FRDM-IMXRT1152 board
Personal Computer
Board settings
ADC1_IN0 is ADC input. Please sample voltage by J47-8 pin.
Prepare the Demo
Connect a USB cable between the host PC and the OpenSDA USB port on the target board.
Open a serial terminal with the following settings:
115200 baud rate
8 data bits
No parity
One stop bit
No flow control
Download the program to the target board.
Either press the reset button on your board or launch the debugger in your IDE to begin running the demo.
Running the demo
The log below shows the output of the lpadc sample rate count demo in the terminal window:
ADC High Sample Rate Demo: Sample Input Signal
Please input the analog signal to the ADC channel.
In order to recover the input signal as completely as possible,
please ensure that the frequency of the input signal is less than 1MHz
Please input any key to trigger ADC conversion.
After getting enough sample point, the ADC will be stopped and the sample point data will be printed via UART. Use some tools such as EXCEL to redraw the input signal based on those sample point data. Please note that the amplitude of the input analog signal should be less than 1.8V.