Changes between Initial Version and Version 1 of linux/devmem

Timestamp:

10/22/2017 05:28:45 AM (7 years ago)

Author:

trac

Comment:

--

linux/devmem

@@ +1 @@
+This tool can be handy if direct memory address modification is needed based on a change desired after reading the processor reference manual available on Freescale's Website [http://www.freescale.com/webapp/sps/site/prod_summary.jsp?code=i.MX6Q&fpsp=1&tab=Documentation_Tab Link]
+
+devmem is a powerful, yet dangerous tool for modifying memory addresses.
+{{{
+root@OpenWrt:/# devmem
+BusyBox v1.19.4 (2013-10-02 00:06:48 PDT) multi-call binary.
+
+Usage: devmem ADDRESS [WIDTH [VALUE]]
+
+Read/write from physical address
+
+        ADDRESS Address to act upon
+        WIDTH   Width (8/16/...)
+        VALUE   Data to be written
+
+
+}}}
+
+Example Writing:
+{{{
+root@OpenWrt:/# devmem 0x20e05cc 32 0x1b0b8
+}}}
+
+Example Reading:
+{{{
+root@OpenWrt:/# devmem 0x20E06CC 32
+0x0001B0B1
+
+}}}
+
+= Laguna = 
+devmem is inside of the busybox package.
+
+Please enable devmem in the OpenWrt build by using make menuconfig and then re-installing busybox onto the target.