Differences

This shows you the differences between two versions of the page.

--- projects:zsun-wifi-card-reader [2017/09/12 18:40] – [Hardware hacking] emeryth
+++ projects:zsun-wifi-card-reader [2020/02/12 16:14] (current) – emeryth
@@ Line 1: / Line 1: @@
+{{template>:template:project
+ | name=zsun-wifi-card-reader
+ | status=abandoned
+ | founder=[[user>emeryth]]
+ | repo=[[github>emeryth/source]] [[github>emeryth/openwrt-zsun]]
+}}
 ====== Hacking the Zsun WiFi SD Card Reader ======
 {{:projects:banner.jpg?nolink&700|}}
@@ Line 118: / Line 125: @@
 AR9331 is capable of working as a usb device (gadget).
-<del>Unfortunately the code for that exists only as a patch for an old version of OpenWrt:</del>
+<del>Unfortunately the code for that exists only as a patch for an old version of OpenWrt:
-http://neykov.name/posts/ar933x-usb-device-driver/
+http://neykov.name/posts/ar933x-usb-device-driver/ </del>
 **The USB device/gadget patch has been added to mainline LEDE!**
@@ Line 126: / Line 133: @@
 So if you want to use the zsun as a USB gadget you will need to:
-  - <del>Port the code</del> Compile LEDE from source
+  - <del>Port the code</del> Compile LEDE from source, look for more info in the LEDE section of this page
   - Remove the G13 bootstrap resistor setting USB to host mode
-  - <del>Remove the card reader PCB and</del> (the card reader PCB now contains the 3.3V regulator, so you can't just remove it) rewire the the USB signal pins to a USB plug
+  - <del>Remove the card reader PCB and</del> (the card reader PCB now contains the 3.3V regulator, so you can't just remove it) rewire the the USB signal pins (the ones on the bottom right in the pictures) to a USB plug
+Here's what it looks like on the old PCB with the pins connected to the original USB plug:
+{{:projects:usb_gadget.jpg?direct&600|}}
 ==== Original firmware ====
@@ Line 177: / Line 189: @@
 Compiled images and image builder: \\
-https://owncloud.hackerspace.pl/index.php/s/7s5c5RDS7Njgwpv
+<del>https://owncloud.hackerspace.pl/index.php/s/7s5c5RDS7Njgwpv</del>
+https://owncloud.hackerspace.pl/s/e4zWPZ8FqFMnrgk
 **You cannot use kernel modules from the official repository, use the image builder or compile them yourself if they're not included.**
@@ Line 187: / Line 200: @@
   * The SD card detect pin is registered as a button and will trigger failsafe when inserted/removed during boot
   * The SD card reader is reset every time a card is inserted or removed
+==== LEDE ====
+https://forum.lede-project.org/t/supporting-zsun-wifi-card-reader-16mb-flash-64mb-ram-ar9331/2142
+I've made a quick port of LEDE:
+https://github.com/Emeryth/source/tree/zsun
+**good news:**
+It has USB gadget
+**bad news:**
+The standard LEDE kernel is too big to fit in the original kernel partition.
+You need to either change the bootloader and flash layout, or decrease the kernel image size by disabling things like debug symbols.