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Input: walkera0701 - convert documentation into ReST format

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This file require minimum adjustments to be a valid ReST file.
Do it, in order to be able to parse it with Sphinx.

Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
This commit is contained in:
Mauro Carvalho Chehab 2017-04-04 17:49:22 -07:00 committed by Dmitry Torokhov
parent 730518f2c4
commit de3d27fc2b
1 changed files with 35 additions and 16 deletions
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51
Documentation/input/walkera0701.txt
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@ -1,3 +1,6 @@
===========================
Walkera WK-0701 transmitter
===========================
Walkera WK-0701 transmitter is supplied with a ready to fly Walkera Walkera WK-0701 transmitter is supplied with a ready to fly Walkera
helicopters such as HM36, HM37, HM60. The walkera0701 module enables to use helicopters such as HM36, HM37, HM60. The walkera0701 module enables to use
@ -10,7 +13,8 @@ or use cogito:
cg-clone http://zub.fei.tuke.sk/GIT/walkera0701-joystick cg-clone http://zub.fei.tuke.sk/GIT/walkera0701-joystick
Connecting to PC: Connecting to PC
================
At back side of transmitter S-video connector can be found. Modulation At back side of transmitter S-video connector can be found. Modulation
pulses from processor to HF part can be found at pin 2 of this connector, pulses from processor to HF part can be found at pin 2 of this connector,
@ -19,7 +23,8 @@ modulation pulses to PC, signal pulses must be amplified.
Cable: (walkera TX to parport) Cable: (walkera TX to parport)
Walkera WK-0701 TX S-VIDEO connector: Walkera WK-0701 TX S-VIDEO connector::
(back side of TX) (back side of TX)
__ __ S-video: canon25 __ __ S-video: canon25
/ |_| \ pin 2 (signal) NPN parport / |_| \ pin 2 (signal) NPN parport
@ -30,10 +35,10 @@ Walkera WK-0701 TX S-VIDEO connector:
------- 3 __________________________________|________________ 25 GND ------- 3 __________________________________|________________ 25 GND
E E
I use green LED and BC109 NPN transistor. I use green LED and BC109 NPN transistor.
Software: Software
========
Build kernel with walkera0701 module. Module walkera0701 need exclusive Build kernel with walkera0701 module. Module walkera0701 need exclusive
access to parport, modules like lp must be unloaded before loading access to parport, modules like lp must be unloaded before loading
@ -44,7 +49,8 @@ be changed by TX "joystick", check output from /proc/interrupts. Value for
Technical details: Technical details
=================
Driver use interrupt from parport ACK input bit to measure pulse length Driver use interrupt from parport ACK input bit to measure pulse length
using hrtimers. using hrtimers.
@ -53,17 +59,29 @@ Frame format:
Based on walkera WK-0701 PCM Format description by Shaul Eizikovich. Based on walkera WK-0701 PCM Format description by Shaul Eizikovich.
(downloaded from http://www.smartpropoplus.com/Docs/Walkera_Wk-0701_PCM.pdf) (downloaded from http://www.smartpropoplus.com/Docs/Walkera_Wk-0701_PCM.pdf)
Signal pulses: Signal pulses
(ANALOG) -------------
SYNC BIN OCT
+---------+ +------+ ::
| | | |
--+ +------+ +--- (ANALOG)
SYNC BIN OCT
+---------+ +------+
| | | |
--+ +------+ +---
Frame
-----
::
Frame:
SYNC , BIN1, OCT1, BIN2, OCT2 ... BIN24, OCT24, BIN25, next frame SYNC .. SYNC , BIN1, OCT1, BIN2, OCT2 ... BIN24, OCT24, BIN25, next frame SYNC ..
pulse length: pulse length
------------
::
Binary values: Analog octal values: Binary values: Analog octal values:
288 uS Binary 0 318 uS 000 288 uS Binary 0 318 uS 000
@ -80,7 +98,8 @@ pulse length:
(Warning, pulses on ACK are inverted by transistor, irq is raised up on sync (Warning, pulses on ACK are inverted by transistor, irq is raised up on sync
to bin change or octal value to bin change). to bin change or octal value to bin change).
Binary data representations: Binary data representations
---------------------------
One binary and octal value can be grouped to nibble. 24 nibbles + one binary One binary and octal value can be grouped to nibble. 24 nibbles + one binary
values can be sampled between sync pulses. values can be sampled between sync pulses.
@ -100,10 +119,10 @@ binary value can be sampled. This bit and magic number is not used in
software driver. Some details about this magic numbers can be found in software driver. Some details about this magic numbers can be found in
Walkera_Wk-0701_PCM.pdf. Walkera_Wk-0701_PCM.pdf.
Checksum calculation: Checksum calculation
--------------------
Summary of octal values in nibbles must be same as octal value in checksum Summary of octal values in nibbles must be same as octal value in checksum
nibble (only first 3 bits are used). Binary value for checksum nibble is nibble (only first 3 bits are used). Binary value for checksum nibble is
calculated by sum of binary values in checked nibbles + sum of octal values calculated by sum of binary values in checked nibbles + sum of octal values
in checked nibbles divided by 8. Only bit 0 of this sum is used. in checked nibbles divided by 8. Only bit 0 of this sum is used.