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explain how to use it

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Jeff Epler 2022-10-23 12:15:13 -05:00
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README.md
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@ -31,5 +31,18 @@ This shows the amount of code (& initialized data) to be loaded from a.out-strip
Then, it shows the size and offset in ULP memory of the symbol `shared_mem`. Then, it shows the size and offset in ULP memory of the symbol `shared_mem`.
## Using ## Using
In principle, you now use a wrapper around `minielf` to (A) load the Coproc
binary and (B) to find symbols within the CoprocMemory. The demo is designed for the ESP32-S3-EYE board, which has an LED on GPIO3. You
can potentially use a different LED location by editing `ulp.c` and changing
the line `#define GPIO (GPIO_NUM_3)`.
After you `make`, copy `a.out-stripped` and all the Python files in `py` to
CIRCUITPY. At the repl, `import do_coproc`. (by not saving this file as
`code.py`, it is not automatically run at startup, which helps when dealing
with hardfaults)
The LED will blink at two alternating rates, "around 5Hz" and "around 2.5Hz".
Note that as of 8.0.0-beta.3-31-gedce717cfc, hitting ctrl-c to interrupt the
program & halt the coproc frequently causes the device to freeze, disconnect,
or restart in safe mode.