HydraFW LIN guide

HydraFW Bus LIN (Local Interconnect Network)

Bus: LIN
Connections: two pins (RX/TX) and ground.
Output types: 3.3volt normal output, or open drain
(pull-up/pull-down resistors integrated in MCU or external).
Pull-up resistors: required for open collector output mode (2K – 10K).
Maximum Voltage: 5.5volts (5volt safe).

This guide is updated towards firmware release HydraFW v0.9 Beta

For hardware shield supported see https://github.com/smillier/HydraLINCAN

Protocol configuration syntax description:

• show Show LIN parameters or show pins Show pins used in this mode

• device with parameter 1 or 2 to choose LIN device (1 or 2)

• exit to exit LIN mode

Note default value for device 1 or 2: 
For device 1 (LIN1):
> lin device 1
Note: LIN parameters have been reset to default values.
Device: LIN1

For device 2 (LIN2):
> lin device 2
Note: LIN parameters have been reset to default values.
Device: LIN2

Configuration options:

Hardware Informations:

lin1> show pins
TX: PA9
RX: PA10

lin2> show pins
TX: PA2
RX: PA3

Protocol configuration example:

Protocol interaction syntax description:

trigger configures the trigger mode

r or read Read one byte. (r:1…255 for bulk reads)

hd Read one byte. (hd:1…255 for bulk reads). Displays a hexdump of the result (See Hexdump guide)

w or write Followed by values to write byte(s). (w:1…255 for bulk writes)

0 Write this Octal value. Format is prefixed by a 0 (values from 000 to 077)

0b Write this binary value. Format is 0b00000000 for a byte, but partial bytes are also fine: 0b1001.

0x Write this HEX value. Format is 0x01. Partial bytes are fine: 0xA. A-F can be lower-case or capital letters.

0-255 Write this decimal value. Any number not preceded by 0x, or 0b is interpreted as a decimal value.

" Write an ASCII-encoded string

[ Write a LIN break

Write support optional repeat : (eg.: 10:1…255 for repeated write of same value 10 in this example)

space Value delimiter. Use a space to separate numbers/commands. Any combination is fine, delimiter is required between each number/command, Example: 0x1 0xff 0 10 0b11 077

& Delay 1uS. (&:1…1000000 for multiple delays)

% Delay 1mS. (%:1…1000000 for multiple delays)

Protocol interaction example usage LIN1 write:

lin1> 0x01 0x02 ~ r 0x00:4
WRITE: 0x01 0x02 0x53 
READ: 0x80
WRITE: 0x00 0x00 0x00 0x00

Additional informations about LIN

For more details on LIN see https://en.wikipedia.org/wiki/Local_Interconnect_Network