json-ipc's Introduction

Allows python objects to be sent over a serial like interface from one device to another.

Files

File	Description
json_pkt.py	Implements JSON Packet parsing and sending.
json_echo.py	Echo server which runs on the pyboard.
stm_usb_port.py	Pyboard serial interface over USB_VCP.
dump_mem.py	Utility function for dumping memory.
echo_server.py	Echo server which runs on the host.
json_test.py	Echo client which runs on the host.
serial_port.py	Host serial interface over UART.
socket_port.py	Host serial interface over Socket.

Example

In one window on the PC, run echo_server.py, and in another window run json_test.py --socket. You should see the following from the echo_server.py window:

2248 >./echo_server.py 
Waiting for connection
Connection from: ('127.0.0.1', 53328)
type of conn <class 'socket.socket'>
type of addr <class 'tuple'>
Got [1, 2, 3]
Got {'b': 22, 'c': 33, 'a': 11}
Got {'d': 'This is a test'}

and you should see this:

2044 >./json_test.py --socket
Sending [1, 2, 3]
   Rcvd [1, 2, 3]
Sending {'a': 11, 'b': 22, 'c': 33}
   Rcvd {'a': 11, 'b': 22, 'c': 33}
Sending {'d': 'This is a test'}
   Rcvd {'d': 'This is a test'}

from the json_test.py window.

To test on the pyboard, copy json_pkt.py, json_echo.py, dump_mem.py and stm_usb_port.py to /flash and import json_echo to run the echo server on the pyboard.

IMPORTANT NOTE: Remember to disconnect your terminal emulator after starting json_echo.py on the pyboard and before running json_test.py on the host.

Now run json_test.py --serial /dev/tyACM0 on the host and you should see:

2250 >./json_test.py --serial /dev/ttyACM0
Sending [1, 2, 3]
   Rcvd [1, 2, 3]
Sending {'b': 22, 'c': 33, 'a': 11}
   Rcvd {'c': 33, 'b': 22, 'a': 11}
Sending {'d': 'This is a test'}
   Rcvd {'d': 'This is a test'}

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