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Wokwi is a simulator. The idea is that we could be able to simulate a v7 board, including it's main two chips:
- PCA9535 , I2C 16 bit IO expander, manages eink slow signals
- TPS65185, also talks …
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I designed an IO expander card with four **PCA9555** chips with optional 8-bit **ULN2308** buffers. While exploring the options to share i2c bus with several instances of either `pca9535` or `port-exp…
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Found a library for the TCA9554 io_expander, but is there also one for the PCA9554 expander? Using it on an Adafruit Qualia board with ESP32-S3 to connect a 40 pin LCD display. The SPI interface for t…
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The backorder for the I/O expander is estimated at around 80 weeks ( https://lcsc.com/product-detail/I-O-Expanders_Microchip-Tech-MCP23017-E-SO_C47023.html ) // Are their alternative chips? I noticed …
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### Is your feature request related to a problem? Please describe.
_No response_
### Are you looking for hardware support?
Does marlin support ESP-S2?
### Describe the feature you want
Hello ever…
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Is it possible to either add an additional menu option to write an 8 bit value to a register at a specified device address?
I’ve been playing with the MCP23008 & MCP23017 GPIO Expander chips lately…
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Minimum plan to untether the Gigatron from Arduino/Babelfish and special laptop/PC software (sendFile.py).
Building on top of [CardTest](https://forum.gigatron.io/viewtopic.php?p=918#p918):
1. D…
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The original repo by dawsonjon has not been updated in few years.
After forking, these is the things I would to do in the next few days.
- [x] Upgrade to Python 3
- [x] publish package to pyp…
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I would suggest adding an I2C I/O expander to the card to allow more flexibility and resolve the limitations when using an SD card etc. An example here from TI.
[TCA9555 16bit I2C I/O expander](htt…
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Very popular I/O expanders from Microchip:
MCP23008 - I2C, 8 channels
MCP23017 - I2C, 16 channels
MCP23S08 - SPI, 8 channels
MCP23S17 - SPI, 16 channels
The channels on these devices can be set indiv…