15b4baba28
- minimize RAM usage of all components - use both IRAM and DRAM in player component so we can buffer up to 1s on modules without SPI RAM - support fragemented pcm chunks so we can use all available RAM if there isn't a big enough block available but still enough HEAP - reinclude all components from jorgen's master branch - add custom i2s driver to get a precise timing of initial sync - change wrong usage of esp_timer for latency measurement of snapcast protocol - add player component
51 lines
1.5 KiB
Markdown
51 lines
1.5 KiB
Markdown
# Dot Product Calculation Example
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(See the README.md file in the upper level 'examples' directory for more information about examples.)
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This example demonstrates how to use dotprod dsps_dotprod_f32 from esp-dsp library. Example does the following steps:
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1. Initialize the input arrays
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2. Calculate dot product of two arrays
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3. Compare results and calculate execution time in cycles.
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## How to use example
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### Hardware required
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This example does not require any special hardware, and can be run on any common development board.
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### Configure the project
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If using Make based build system, run `make menuconfig` and set serial port under Serial Flasher Options.
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If using CMake based build system, no configuration is required.
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Also, under Component Config/DSP Library/Optimization for ESP32, it's possible to select optimized or ansi implementation to compare.
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### Build and flash
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Build the project and flash it to the board, then run monitor tool to view serial output:
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```
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make -j4 flash monitor
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```
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Or, for CMake based build system (replace PORT with serial port name):
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```
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idf.py -p PORT flash monitor
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```
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(To exit the serial monitor, type ``Ctrl-]``.)
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See the Getting Started Guide for full steps to configure and use ESP-IDF to build projects.
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## Example output
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Here is an typical example console output.
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```
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I (55) main: Start Example.
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I (55) main: The sum of 101 elements from 0..100 = 5050.000000
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I (55) main: Operation for 101 samples took 1381 cycles
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I (65) main: End Example.
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```
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