The Diavox Project "Old phone cellphone"

Where to start?

The scope of the project is rather large so it is divided into sub-projects and their individual tasks. Some have dependencies which have to be completed first.

Debug probe   ✓ Completed

• .: Goal : Setup pico debugger for use.  ✓
• .: Tasks :.
  • Go through pinout of the AE-RP2040 and compare to the standard pico  ✓
  • Solder the debug cable to the AE-RP2040  ✓
  • Solder pinheader for UART to the AE-RP2040  ✓
  • Program the AE-RP2040 with debug software  ✓
  • Test if the debug probe is identified by computer  ✓
• .: Resources & Tools :.
  • Soldering equipment
  • Laptop
• .: Milestones :.
  • Soldering finished  ✓
  • Successful programming of the AE-RP2040  ✓
  • Connection to computer successful  ✓

Programming Toolchain   ✓ Completed

• .: Goal : Blink LED on Pico using rust toolchain and debug tool.  ✓
• .: Tasks :.
  • Install rustup ✓
  • Install stable rust, traget and tools  ✓
  • Download and compile rp-hal-boards example  ✓
  • Mount pimeroni pico lipo in bootloader mode  ✓
  • Flash blinky example using cargo run  ✓
  • Create my own rust project ✓
  • Connect debug tool to the Pico ✓
  • Compile example ✓
  • Flash pico through the debug tool ✓

• .: Resources & Tools :.
  • Laptop
  • Pico debug tool
  • Pico LiPo
• .: Dependencies :.
  • Pico debug tool
• .: Milestones :.
  • Test of blinking example ✓
  • Pimeroni Pico LiPo is blinking ✓
  • Setup my rust project ✓
  • Program the Pico LiPo using probe-rs ✓

Bell ringer

• .: Goal : Make the bells ring at specified frequency and pattern.
• .: Tasks :.
  • Remove cables connecting 40V power supply unit with H-Bridge ✓
  • Add a 100uf output capacitor on 40V power supply unit ✓
  • Add a 100uf input capacitor on the psu input ✓
  • Will these two 100uf will make the output stabilize quicker from cold start? ✓
  • Replace bell ringer filter capactior with a new one ✓
  • Add resistors over the ringer for back emf protection ✓
  • Test new H-Bridge module ✓
    • Solder pin headers to module ✓
    • Identify required components for H-Bridge module ✓
    • Set up on a breadboard ✓
    • Send SPWM signals to oscilloscope from pico ✓
    • Make sure we have deadtime insertion ✓
    • Send SPWM signals to H-Bridge ✓
    • Measure the output of the H-Bridge with oscilloscope ✓
    • Would this new H-Bridge work?
      • The H-Bridge motor driver IC does work but the signal isn't a sinewave as the device filters out noise on the inputs and the spwm signal is considered noise.
  • Look for suitable gate drivers and FET's
• .: Resources & Tools :.
  • Breadboard + misc
  • Soldering equipment
  • Laptop
  • Pico debug tool
  • Pico on breadboard
• .: Dependencies :.
  • Pico debug tool
  • Pimeroni Pico LiPo
  • Programming toolchain
• .: Milestones :.
  • Soldering finished
  • Breadboard setup finished
  • Bells are ringing

Keypad matrix scanning

• .: Goal : Scan the keypad matrix and report results over I2C. 
• .: Tasks :.
  • Solder pin headers to the SLG46826V breakout board  ✓
  • Solder socket header to the diavox pcb for the keypad matrix
  • Install GreenPak software from renesas  ✓
    • Register on renesas homepage  ✓
    • Download Go Configure™ Software Hub  ✓
    • Convert debian package to a slackware package  ✓
    • Install the package  ✓
  • Setup the SLG46826V breakout board on a breadboard  ✓
  • Connect I2C interface to the SLG46826V debug header  ✓
  • Test communication with the SLG46826V  ✓
    • Read datasheet  ✓
    • Go through examples  ✓
    • Find a suitable test  ✓
    • Setup extra components if needed  ✓
    • Send chip settings to registers not nvram(1000 writes)  ✓
    • Success? Yes!  ✓
  • Keypad scanning project in green pak designer  ✓
    • Open keypad scanning example project in GPD  ✓
    • Make a new project for the SLG46826V  ✓
  • 4x3 Keypad Matrix  ✓
    • Connect keypad matrix to the SLG46826V on the breadboard  ✓
  • Send keypad matrix scanning settings to device(registers not NVRAM)  ✓
  • Connect SLG46826V module to Pico Lipo  ✓
    • I2C connection  ✓
    • Keypad matrix output signal  ✓
  • Read the keypad matrix with the Pico Lipo  ✓
    • Test the keypad matrix

• .: Resources & Tools :.
  • SLG46826V breakout board
  • Soldering equipment
  • Laptop
  • USB to I2C interface
  • Breadboard + misc
  • Diavox PCB (keypad matrix for testing)
• .: Milestones :.
  • Soldering finished  ✓
  • Breadboard setup  ✓
  • Connection to computer successful  ✓
  • Send test settings to SLG46826V  ✓
  • Keypad matrix scanning reports over I2C  ✓
  • Testing completed

LTE Modem

• .: Goal : Communicate with modem :.