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License: GNU General Public License v3.0
An E-Stim driver for the RP2040 microcontroller.
License: GNU General Public License v3.0
Use internal ADC (with high sampling rate) to log calibration curve for expected feedback values. It would most likely require #2 to be implemented.
Compare this curve to the current channel feedback, if it differs, activate fail-safe and turn off power.
Primary useful if the PFET fails closed, since the channel would immediately go full power. It would also prevent run away conditions.
Support GPIO expander functionality (digital read/write) via the I2C slave memory.
Support digipot for audio input gain.
Support using RP2040 hardware PWM for the DAC interface.
https://www.raspberrypi.com/documentation/pico-sdk/hardware.html#hardware_pwm
Replace floating point math in pulse_gen.c with fixed point.
Requires testing to see if the speed benefits are worth the time.
Support using internal ADC for channel calibration via fetch_analog_buffer().
Add pulse generator support for phase offset using a channel reference.
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