onewire_link: Drop PD info not useful for the user.

[libsigrokdecode.git] / decoders / onewire_link / __init__.py

diff --git a/decoders/onewire_link/__init__.py b/decoders/onewire_link/__init__.py
index 6eaeadd047aecb68a781a34feae28f350bb5541a..f55b998aaadeb2b313c31bf216b23c3df2471f64 100644 (file)
--- a/decoders/onewire_link/__init__.py
+++ b/decoders/onewire_link/__init__.py
@@ -1,5 +1,5 @@
 ##
 ##

-## This file is part of the sigrok project.
+## This file is part of the libsigrokdecode project.

 ##
 ## Copyright (C) 2012 Uwe Hermann <uwe@hermann-uwe.de>
 ##
 ##
 ## Copyright (C) 2012 Uwe Hermann <uwe@hermann-uwe.de>
 ##


@@ -19,58 +19,53 @@
 ##
 
 '''
 ##
 
 '''

-1-Wire protocol decoder.
+1-Wire protocol decoder (link layer).

 
 

-The 1-Wire protocol enables bidirectional communication over a single wire (and
-ground) between a single master and one or multiple slaves. The protocol is
-layered, the provided parser decodes the next layers:
-- Link layer (reset, presence detection, reading/writing bits)
-- Network layer (skip, search, match device ROM addresses)
-The higher layers (transport, presentation) are not decoded, since they are
-mostly device specific and it would take a lot of code to interpret them.
+The 1-Wire protocol enables bidirectional communication over a single wire
+(and ground) between a single master and one or multiple slaves. The protocol
+is layered:
+
+ - Link layer (reset, presence detection, reading/writing bits)
+ - Network layer (skip/search/match device ROM addresses)
+ - Transport layer (transport data between 1-Wire master and device)
+
+This protocol decoder handles the 1-Wire link layer.

 
 Sample rate:
 
 Sample rate:

-A high enough sample rate is required to properly detect all the elements of
-the protocol. A lower sample rate can be used if the master does not use
-overdrive communication speed. The next minimal values should be used:
-- overdrive     available:   2MHz minimum, 5MHz suggested
-- overdrive not available: 400kHz minimum, 1MHz suggested
+A sufficiently high samplerate is required to properly detect all the elements
+of the protocol. A lower samplerate can be used if the master does not use
+overdrive communication speed. The following minimal values should be used:
+
+ - overdrive available: 2MHz minimum, 5MHz suggested
+ - overdrive not available: 400kHz minimum, 1MHz suggested

 
 Probes:
 1-Wire requires a single signal, but some master implementations might have a
 
 Probes:
 1-Wire requires a single signal, but some master implementations might have a

-separate signal use to deliver power to the bus during temperature conversion
-as an example. This power signal is currently not parsed.
-- owr (1-Wire bus)
-- pwr (1-Wire power)
+separate signal used to deliver power to the bus during temperature conversion
+as an example. This power signal is currently not used.
+
+ - owr (1-Wire signal line)
+ - pwr (optional, dedicated power supply pin)

 
 Options:
 
 Options:

-1-Wire is an asynchronous protocol, so the decoder must know the sample rate.
-The timing for sampling bits, presence and reset is calculated by the decoder,
+1-Wire is an asynchronous protocol, so the decoder must know the samplerate.
+The timing for sampling bits, presence, and reset is calculated by the decoder,

 but in case the user wishes to use different values, it is possible to
 but in case the user wishes to use different values, it is possible to

-configure the next timing values (number of sample rate periods):
-- overdrive              (if active the decoder will be prepared for overdrive)
-- cnt_normal_bit         (time for normal mode sample bit)
-- cnt_normal_presence    (time for normal mode sample presence)
-- cnt_normal_reset       (time for normal mode reset)
-- cnt_overdrive_bit      (time for overdrive mode sample bit)
-- cnt_overdrive_presence (time for overdrive mode sample presence)
-- cnt_overdrive_reset    (time for overdrive mode reset)
-This options should be configured only on very rare cases and the user should
-read the decoder source code to understand them correctly.
+configure the following timing values (number of samplerate periods):

 
 

-Annotations:
-Annotations can be shown for each layer of the protocol separately:
-- link (the value of each transmitted bit is shown separately)
-- network (the ROM command, and address are shown)
-- transport (only transport layer byte transfers are shown)
-If link layer annotations are shown, possible issues with sample rate and sample
-timing are also shown.
+ - overdrive              (if active the decoder will be prepared for overdrive)
+ - cnt_normal_bit         (time for normal mode sample bit)
+ - cnt_normal_slot        (time for normal mode data slot)
+ - cnt_normal_presence    (time for normal mode sample presence)
+ - cnt_normal_reset       (time for normal mode reset)
+ - cnt_overdrive_bit      (time for overdrive mode sample bit)
+ - cnt_overdrive_slot     (time for overdrive mode data slot)
+ - cnt_overdrive_presence (time for overdrive mode sample presence)
+ - cnt_overdrive_reset    (time for overdrive mode reset)

 
 

-TODO:
-- add CRC checks for network layer
-- add transport layer code
-- review link layer code, to check for protocol correctness
-- define output protocol
+These options should be configured only on very rare cases and the user should
+read the decoder source code to understand them correctly.

 '''
 
 '''
 

-from .onewire_link    import *
+from .pd import *
+