CHANGELOG.md

@@ -1,11 +1,3 @@
-v1
-==
-
-changes:
-
-- make capabilities more compact
-- add interpretation purpose part
-
 v0
 ==
 

Makefile

@@ -1,6 +1,6 @@
 # project file name (use for schematic and board layout)
 NAME ?= usb-microbc_cable_tester
-SUBSHEET ?= usb-microbc_cable_tester-mcu 
+SUBSHEET ?= 
 # path to KiCad CLI
 KICAD = kicad-cli
 # path to qeda

README.md

@@ -1,5 +1,5 @@
-The USB micro-B and C cable tester identifies capabilities supported by USB cables and deduces it's purpose.
-It helps figuring out if a USB cable is for charging or to transfer data, and at which speed.
+The USB micro-B and C cable tester identifies functionalities supported by USB cables.
+It helps figuring out if a USB cable is for charging or to transfer data.
 It supports type A to micro-B, A to C, and C to C USB cables.
 
 usage
@@ -8,10 +8,7 @@ usage
 - ensure the tester has a non-empty battery in the CR2032/2025, or is externally powered through the USB power port
 - plug one end of the cable in one of the host ports
 - plug the other end of the cable in one of the devices ports
-- the tester will identify the cable's capabilities, on the left side
-- the tester will then show the cable's purpose, on the right side
-
-To understand further the capabilities and purpose of a cable, I recommend reading the USB specification, mainly the one for the [type-C connector](https://www.usb.org/document-library/usb-type-cr-cable-and-connector-specification-release-23).
+- the tester will identify the cable's capabilities
 
 design choice
 =============
@@ -27,8 +24,7 @@ do:
 - C to C: often used for high power charging of phones and laptops
 - battery operated: it's a very simple device, and this avoids needing to require external power
 - power port: in case you have no battery or it runs out
-- USB 3.0: because it is hard to identify if C-C cable support SuperSpeed
-- purpose: deduce from capabilities
+- USB 3.0: because it is hard to identify if C-C cable support Super-Speed
 
 don't:
 
@@ -36,29 +32,11 @@ don't:
 - A or micro-B 3.0: the connectors that support it are obvious, and it's rare they are used for anything else than Super-Speed transfer (plus they are less common or problematic)
 - Power Delivery capabilities: this requires complex host software communicating with the eMarker chip in the cable
 - OTG: even if detecting this functionality is easy, micro-B OTG adapters are not popular anymore
-- impedance: only the presence of wires is tester, not their impedance
 
-mode of operation
------------------
+future:
 
-Most of the tests just verify if the wires corresponding to capabilities are present in the cable.
-Some additional tests verify the resistances in the plugs.
-For more details, check the schematic, and refer to [type-C specification](https://www.usb.org/document-library/usb-type-cr-cable-and-connector-specification-release-23).
-
-The left side identifies the capabilities.
-Based on that, a micro-controller (MCU) with map the combination into a purpose on the right side.
-The left side if independent of the MCU and right side.
-
-limitation
-----------
-
-The tester does not:
-
-- verify the resistance of wires, particularly the power ones
-- verify the impedance of wires, particularly the differential ones
-- verify if the shield(s) is more than just a wire
-- read out capabilities from electronically marked cables
-- guarantee USB cable compliance or conformity, as this is [very complex](https://www.usb.org/documents?search=&category%5B%5D=49&type%5B%5D=56&tid_2%5B%5D=41&items_per_page=50)
+- interpret the supported functionalities to show the cable purpose
+- show a simple cable type result, and not just the individual capabilities
 
 alternatives
 ------------

library

@@ -1 +1 @@
-Subproject commit e5b0ca3a0f7bb2f5766f3702089849c8915a0f99
+Subproject commit 99148daea6eacd9607034755cb8d5db6fa9cbac7

usb-microbc_cable_tester.kicad_pro

@@ -34,9 +34,9 @@
         "other_text_thickness": 0.15,
         "other_text_upright": false,
         "pads": {
-          "drill": 0.0,
-          "height": 0.75,
-          "width": 1.0
+          "drill": 0.65,
+          "height": 0.7,
+          "width": 0.7
         },
         "silk_line_width": 0.15,
         "silk_text_italic": false,
@@ -63,18 +63,11 @@
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-        "annular_width|35900000|95700000|1234f73d-e1bf-4ce6-bffd-9f6c9baa31d4|00000000-0000-0000-0000-000000000000",
-        "annular_width|91900000|39300000|d1240d82-304e-402f-9e07-e8a9bfa24077|00000000-0000-0000-0000-000000000000",
         "hole_clearance|29200000|78500000|03d8bccf-b8af-4b65-995d-52b211824b79|b273bd28-b735-460e-9629-b604ece021b4",
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-        "silk_over_copper|27568860|96059411|225f9512-3655-4795-b3f0-24c50d8a5ffe|00000000-0000-0000-0000-000000000000",
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+        "silk_over_copper|31397832|93276086|225f9512-3655-4795-b3f0-24c50d8a5ffe|00000000-0000-0000-0000-000000000000",
         "starved_thermal|33230000|68250000|0f274f56-d43e-4e24-9b15-8ed27e8fe292|ca46053d-5407-4cdd-80ad-957e35d3d2b4|F.Cu",
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-        "starved_thermal|97350000|50550000|0f274f56-d43e-4e24-9b15-8ed27e8fe292|9f531913-b953-4aae-b2db-a4cd2ebc9eeb|F.Cu",
-        "starved_thermal|99350000|45550000|0f274f56-d43e-4e24-9b15-8ed27e8fe292|60b7eee2-7611-48f9-8a01-048fac39241a|F.Cu"
+        "starved_thermal|33230000|69750000|0f274f56-d43e-4e24-9b15-8ed27e8fe292|8ce723e8-2734-414b-b386-f7496794b674|F.Cu"
       ],
       "meta": {
         "version": 2
@@ -518,10 +511,6 @@
       {
         "netclass": "Thick",
         "pattern": "GNDPWR"
-      },
-      {
-        "netclass": "Thick",
-        "pattern": "VCC"
       }
     ]
   },
@@ -584,10 +573,6 @@
     [
       "43fc3289-82a7-492c-a423-3030e10115dc",
       ""
-    ],
-    [
-      "aff934c6-d889-4e87-9eff-11f437174b1f",
-      "interpret"
     ]
   ],
   "text_variables": {}