README

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adcsinglechannel

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Example Summary

Example that uses the ADC driver to make a number of samples and print them via UART.

Peripherals Exercised

• Board_ADC0 - ADC channel 0
• Board_ADC1 - ADC channel 1

Resources & Jumper Settings

If you’re using an IDE (such as CCS or IAR), please refer to Board.html in your project directory for resources used and board-specific jumper settings. Otherwise, you can find Board.html in the directory <SDK_INSTALL_DIR>/source/ti/boards/<BOARD>.

Example Usage

• Example output is generated through use of Display driver APIs. Refer to the Display driver documentation found in the SimpleLink MCU SDK User’s Guide.

• Connect the ADC channels to the sampling sources.
  • For quick testing, connect Board_ADC0 to GND and Board_ADC1 to 3V3.

Important: Caution should be used when connecting the pins to analog inputs greater than 3VDC.

• Open a serial session (e.g. PuTTY, etc.) to the appropriate COM port.
  • The COM port can be determined via Device Manager in Windows or via ls /dev/tty* in Linux.

The connection will have the following settings:

    Baud-rate:     115200
    Data bits:          8
    Stop bits:          1
    Parity:          None
    Flow Control:    None

• Run the example.

Example snippet of outputs:

        ADC channel 1 raw result (4): 230

        ADC channel 1 convert result (4): 2500000 uV
                    .                 .     .
                    .                 .     .
                    .                 .     .
        ADC channel 1 raw result (9): 280

        ADC channel 1 convert result (9): 3000000 uV

• The example outputs one sample from Board_ADC0 and ten samples from Board_ADC1.

• The actual conversion result values may vary depending on the reference voltage settings. Please refer to the board specific datasheet for more details.

Application Design Details

This application uses two threads:

threadFxn0 - performs the following actions:

1. Opens an ADC driver object.

2. Uses the ADC driver object to perform a single sample and outputs the result.

3. Closes the ADC driver object.

threadFxn1 - performs the following actions:

1. Opens an ADC driver object.

2. Uses the ADC driver object to perform 10 samples and output the results.

3. Closes the ADC driver object.

TI-RTOS:

• When building in Code Composer Studio, the kernel configuration project will be imported along with the example. The kernel configuration project is referenced by the example, so it will be built first. The “release” kernel configuration is the default project used. It has many debug features disabled. These feature include assert checking, logging and runtime stack checks. For a detailed difference between the “release” and “debug” kernel configurations and how to switch between them, please refer to the SimpleLink MCU SDK User’s Guide. The “release” and “debug” kernel configuration projects can be found under <SDK_INSTALL_DIR>/kernel/tirtos/builds/<BOARD>/(release|debug)/(ccs|gcc).

FreeRTOS:

• Please view the FreeRTOSConfig.h header file for example configuration information.