Description

• Custom application for the EVAL-AD5940ELCZ.
• Automatically cycles between amperometric measurements and impedance measurements.
• Python application provided for logging of measurements and control.

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Installation

Note: Instructions assume that the working copy of the ampimp repository will be located in ~/repos/ampimp.

• If ~/repos does not exist, then create it:
  $ mkdir ~/repos
• Navigate to directory that will store repository working copies:
  $ cd ~/repos
• Clone ampimp repository:
  $ git clone --depth 1 --recurse-submodules git@github.com:ninfinity/ampimp.git

Docker container

Automated setup of portable, self-contained image that includes necessary tools and source code.
INCOMPLETE

• Starting from ampimp root directory:
  $ cd docker

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Usage

Note: Instructions assume that the root directory of the working copy of the ampimp repository is located in ~/repos/ampimp.

Serial terminal

• From Linux terminal:
  $ screen -L /dev/ttyS0 230400 -L
• Commands:
  • help: print supported commands
  • start: start selected application
  • stop: stop selected application
  • switch <appid>: stop current app and switch to new application set by <appid>
<appid>: 0 = amperometric, 1 = impedance

Python app

Prerequisites:

• Python 3

• pySerial

• Starting from ampimp root directory:
  $ cd py
$ pipenv install
$ pipenv shell
$ python3 ampimp_app.py

• Ctrl+c terminates the app and stops the device.

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Development

Note: Instructions assume the following:

• The root directory of the working copy of the ampimp repository is located in ~/repos/ampimp.
• The user's SSH public key has been added to their GitHub account.

Building source

Prerequisites:

• Git
• GNU ARM toolchain
• CMake

$ mkdir ad5940
$ cd ad5940
$ git clone --recurse-submodules git@github.com:ninfinity/ad5940.git
$ cd ad5940/ad5940
$ ./build.sh

OpenOCD

• Install prerequisites:
  $ sudo apt-get install make libtool pkg-config autoconf automake texinfo libusb-dev libftdi-dev libhidapi-dev
• Navigate to repos directory:
  $ cd ~/repos
• Clone OpenOCD:
  $ git clone --depth 1 --recurse-submodules git@github.com:ntfreak/openocd.git
$ cd openocd
• Apply patch provided by ampimp to add support for ADuCM302x microcontrollers:
  $ git apply ~repos/ampimp/openocd/aducm302x-200226.patch
• Proceed to configure, build, and install of OpenOCD:
  $ ./bootstrap
$ ./configure
$ make
$ sudo make install
• Working copy of OpenOCD is no longer needed, so remove it:
  $ cd ..
$ rm -rf ./openocd

Debugging

OpenOCD + GDB may be used for debugging via the CMSIS-DAP interface provided by the ADICUP3029.

1. In terminal:
   $ ./debug.sh
(gdb) c # continue execution of code
   Useful commands:
   (gdb) step # execute next instruction, step into function calls
   (gdb) next # execute next instruction, step over function calls
   (gdb) continue # continue running code
   (gdb) load # flash the target device; useful for updating device without disconnecting after building new firmware
   (gdb) Ctrl+c # interrupt execution
   (gdb) list # display several lines of code at debugger position, repeated calls show more lines
   (gdb) break <function> # set a breakpoint at the specified function within the current source file
   (gdb) b <filename>:<function> # set a breakpoint at the specified function within the specified source file
   (gdb) b <line number> # set breakpoint at line within current source file
   (gdb) tui #launch the Text User Interface
   (gdb) q # exit GDB

2. From another terminal window:
   $ screen -L /dev/ttyS0 230400 -L
   Useful screen commands:
   Ctrl+a k: kill screen session
   Ctrl+a d: detach from screen session
   $ screen -ls: list existing screen sessions
   $ screen -r: reattach to existing screen session