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Dot Product Calculation Example

(See the README.md file in the upper level 'examples' directory for more information about examples.)

This example demonstrates how to use dotprod dsps_dotprod_f32 from esp-dsp library. Example does the following steps:

  1. Initialize the input arrays
  2. Calculate dot product of two arrays
  3. Compare results and calculate execution time in cycles.

How to use example

Hardware required

This example does not require any special hardware, and can be run on any common development board.

Configure the project

If using Make based build system, run make menuconfig and set serial port under Serial Flasher Options. If using CMake based build system, no configuration is required. Also, under Component Config/DSP Library/Optimization for ESP32, it's possible to select optimized or ansi implementation to compare.

Build and flash

Build the project and flash it to the board, then run monitor tool to view serial output:

make -j4 flash monitor

Or, for CMake based build system (replace PORT with serial port name):

idf.py -p PORT flash monitor

(To exit the serial monitor, type Ctrl-].)

See the Getting Started Guide for full steps to configure and use ESP-IDF to build projects.

Example output

Here is an typical example console output.

I (55) main: Start Example.
I (55) main: The sum of 101 elements from 0..100 = 5050.000000
I (55) main: Operation for 101 samples took 1381 cycles
I (65) main: End Example.