README.asciidoc: rephrase the part about USB IDs

[libam7xxx.git] / README.asciidoc

diff --git a/README.asciidoc b/README.asciidoc
index 0c2af4a..26ca6ea 100644 (file)
--- a/README.asciidoc
+++ b/README.asciidoc
@@ -1,6 +1,6 @@
 = libam7xxx
 
-libam7xxx is an Open Source library to communicate via USB with Projectors and
+libam7xxx is an Open Source library to communicate via USB with projectors and
 Digital Picture Frames based on the Actions Micro AM7XXX family if ICs.
 
 libam7xxx makes it possible to use these devices as USB displays on
@@ -8,9 +8,12 @@ non-Windows Operating Systems like GNU/Linux or Android/Linux just to name
 a few, and on non-PC platforms like for instance mobile phones, tablets or
 game consoles.
 
-The first driver supporting these devices was acerc11xdrv from Reto Schnider:
+The first driver supporting these devices was _acerc11xdrv_ from Reto Schneider:
 https://github.com/rettichschnidi/acerc11xdrv
 
+Another project with the same purpose is _acerc110_ from Thomas Baquet:
+https://github.com/lordblackfox/acerc110
+
 == AM7XXX
 
 An overview of some AM7XXX chips (AM7211A AM7212 AM7212P AM7318 AM7213D
@@ -21,15 +24,25 @@ is at: http://wenku.baidu.com/view/543c8b4d852458fb770b56ee.html
 
 == Supported devices
 
-The devices supported by libam7xxx use USB bulk trasfers and a simple packet
+The devices supported by libam7xxx use USB bulk transfers and a simple packet
 based protocol to exchange data and commands to and from a host system and the
 AM7XXX chip.
 
-Those with USB VendorID ''1de1'' are devices based on Actions Micro/Action Media
-designs, usually having two modes:
+Devices based on Actions Micro/Action Media designs generally use the USB
+VendorID +1de1+, and they can have two operational modes:
+
+ - USB Mass Storage mode (e.g. ProductID: +1101+)
+ - Generic bulk data transfer mode, or Display mode (e.g. ProductID: +c101+)
+
+On recent GNU/Linux systems the switch from Mass Storage mode to Display mode
+is performed automatically by
+http://www.draisberghof.de/usb_modeswitch/[USB_ModeSwitch], or can be done
+manually with the command:
 
- - USB Mass Storage mode (ProductID: ''1101'')
- - Generic bulk data transfer mode (ProductID: ''c101'')
+ $ sudo usb_modeswitch \
+   --default-vendor 0x1de1 \
+   --default-product 0x1101 \
+   --message-content 55534243087052890000000000000cff020000000000000000000000000000
 
 Examples of devices based on AM7XXX are:
 
@@ -48,7 +61,7 @@ Examples of devices based on AM7XXX are:
   - Other unbranded projectors:
       * http://www.dealextreme.com/p/portable-home-office-mini-usb-2-0-lcos-projector-16-9-45019
 
-  - HannSpree Digital picture frames (but it has not been verified yet if
+  - HannSpree digital picture frames (but it has not been verified yet if
     those can be actually used as USB displays):
       * http://europe.hannspree.net/onweb.jsp?prod_no=3333333621&webno=3333333317
       * http://europe.hannspree.net/onweb.jsp?prod_no=33333337:4&webno=3333333317