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TM1650

Based on your files, I can see you're working with a four-digit seven-segment display that uses direct digit addressing with I2C addresses 0x34, 0x35, 0x36, and 0x37. This appears to be a TM1650 display module. Let me search for more information about similar drivers and displays.

Based on your files and my search results, I can provide some information about your TM1650 display and similar drivers.

Display Type

The display you're working with is a TM1650-based four-digit seven-segment display. The TM1650 is a dedicated LED driver circuit with a keypad scan interface manufactured by Titan Micro Electronics. It uses I2C-like communication (though not standard I2C) and features direct digit addressing via specific registers.

Direct Addressing Approach

Your code in tm1650-test-36.py shows the direct addressing method with the following registers: - Display addresses: 0x24, 0x25, 0x26, 0x27 (for setting segment patterns) - Control addresses: 0x34, 0x35, 0x36, 0x37 (for actual digit control)

This approach is confirmed in one of the libraries I found. The TM1650 uses 0x24 as the control register base address and 0x34 as the display base address, with 4 segments total.

Similar Drivers

While there are several MicroPython libraries for TM1650 displays, most use a different approach than your direct addressing method. Here are some examples:

  1. stonatm/tm1650_micropython - A library for DFRobot TM1650 displays that uses a more abstracted API with methods like display_integer() rather than direct register addressing. This library offers simple methods like on(), display_integer(), and display_clear().

  2. shaoziyang/microbit-lib - Another implementation that provides an interface for Four Digit Display modules with TM1650 chips. It includes functionality for controlling display intensity and showing/hiding decimal points.

  3. maxint-rd/TM16xx - A more comprehensive Arduino library that supports multiple TM16xx family chips including the TM1650. This library enables using print() on 7-segment displays and supports the TM1650 in both 8x4 or 7x4 display modes.

  4. arkhipenko/TM1650 - An Arduino library specifically for TM1650 displays, which might contain implementations you could adapt to MicroPython.

Key Findings

  1. Your approach using direct register addressing (0x34-0x37) for digit control is valid and confirmed in other implementations.

  2. Many libraries use a higher-level abstraction rather than direct register manipulation.

  3. The TM1650 communication protocol resembles I2C but lacks standard addressing, which is why most libraries implement their own bit-banging approach rather than using the standard I2C/Wire libraries.

  4. Your test code is exploring an approach that writes patterns to display addresses (0x24-0x27) and then activates them via control addresses (0x34-0x37), which is consistent with how the TM1650 chip is designed to work.

If you'd like me to help you develop a more comprehensive driver based on your direct addressing approach, I'd be happy to assist with that.