Async kb
Terms:
connection: data transfer session, highest in hierarchy
block: data transfer unit, consists of several frames
frame: lowest data transfer unit. basically -- one network message
Message type ==
- 0x80 = data
- 0x90 = command
commands:
Contents
Request Session
.data[0] = 0xca -- request session
parameters:
.data[1] = priority (always 1)
.data[2] , .data[3] -- message packet max size (16 bit, big endian)
.data[4] == 0x01 (revision)
Session Granted
.data[0] = 0xf2 -- session granted
parameters:
.data[1] = number of frames per block
.data[2] = revision (always 0x01)
.data[3] = priority acknowledge (should reply with the same priority requested)
.data[4] .data[5] = bytes per frame (maximum allowed bytes per frame, 16bit, bigendian)
Starting Transfer
.data[0] = 0xfd
no parameters
Frame Acknowledge
.data[0] = 0xfa (frame acknowledge)
parameters
.data[1]= total number of frames in this block
.data[2]= id of received message
.data[3]= id of current block
