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TC compare mode

This example shows how to use the TC module in compare mode to generate an active low, active high, and toggle output on compare match.

Description

Three TC channels are configured in compare mode. Each channel generates different output waveform depending upon configured action on compare match and period match.

Active low output: Output is set high on compare 1 match and is set low on compare 0 match.

Active high output: Output is set low on compare 1 match and is set high on compare 0 match.

Toggle output: Output toggles on compare 0 match.

Downloading and building the application

To clone or download this application from Github, go to the main page of this repository and then click Clone button to clone this repository or download as zip file. This content can also be downloaded using content manager by following these instructions.

Path of the application within the repository is apps/tc/tc_compare_mode/firmware .

To build the application, refer to the following table and open the project using its IDE.

Project Name Description
sam_e54_xpro.X MPLABX Project for SAM E54 Xplained Pro board
   

Setting up the hardware

The following table shows the target hardware for the application projects.

Project Name Board
sam_e54_xpro.X SAM E54 Xplained Pro board
   

Setting up SAM E54 Xplained Pro board

  • Connect the Debug USB port on the board to the computer using a micro USB cable

Running the Application

  1. Build and Program the application using its IDE
  2. Observe generated waveforms on the oscilloscope

SAM E54 Xplained Pro board

Timer Channel Pin Observable characteristic of the waveform
TC0_WO0 PA04(Pin 14 of EXT1) Toggle output with 37.5 Hz frequency
TC1_WO1 PA07(Pin 6 of EXT1) Active high output with 75 Hz frequency
TC4_WO1 PB09 (Pin 8 of EXT1) Active low output with 75 Hz frequency
     


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