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Since SD1/WP of board definition file is not set to MIO44, SD card is write protected.

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4 posts / 0 new
ikwzm
Junior(0)
Since SD1/WP of board definition file is not set to MIO44, SD card is write protected.

I also met the same kind of trouble as this thread.
http://zedboard.org/content/issues-loading-rootfs-sd-card
This thread avoids the problem by setting "disable-wp" to devicetree.

However, this problem does not exist in the board difinition file, "I / O Configuration"> "Low Speed"> "Memory Interfaces"> "SD"> "SD 1"> "WP" is not set Is the cause

 

I suggest adding the following description to the board difinition file (ultrazed_3eg_iocc/1.0/preset.xml).

 

<user_parameter name = "CONFIG.PSU__SD1__GRP_WP__ENABLE" value = "1" />

<user_parameter name = "CONFIG.PSU__SD1__GRP_WP__IO" value = "MIO 44" />

 

Is there any problem with this method?

 

npoureh
Moderator(4)
UltraZed IO Carrier Card uses

UltraZed IO Carrier Card uses microSD card and there is no WP pin for microSD card slots (only standard SD card uses the WP pin). So, there is no need to define a WP pin for the IOCC in the board definition files.

ikwzm
Junior(0)
"UltraZed I/O Carrer Card

"UltraZed I/O Carrer Card Version 1.0"  Page20  - 2.8 PS microSD Card Connector – J4
http://zedboard.org/sites/default/files/documentations/UltraZed%20IOCC-U...
According to this document, MIO 44 is connected to SD_WP(JP2). Is it necessary to set board diffinition file?
 

micahstevens
Junior(3)
The OS will still look for it

The OS will still look for it though, and it's connected to the jumper on the board. This is necessary unless you disable the WP functionality.