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Appendix
IBR115
User’s Manual
35
E.
MicroSD Card Test
When IBR115 is booted from eMMC, micro
SD card is “/dev/mmcblk1” and
able to see by “ls /dev/mmcblk1*” command:
/dev/mmcblk1 /dev/mmcblk1p2 /dev/mmcblk1p4 /dev/mmcblk1p5
/dev/mmcblk1p6
When booting from microSD card, replace te
st pattern “/dev/mmcblk1” to
“/dev/mmcblk0”.
Note:
This operation may damage the data stored the microSD card. Before
starting the test, make sure there is no critical data in the eMMC flash
being used.
•
Read, write, and check
SD_DIR="/run/media/mmcblk1"
#create data file
dd if=/dev/urandom of=/var/data1 bs=1024k count=100
#write data to SD card
dd if=/var/data1 of=$ SD_DIR/data2 bs=1024k count=100
#read data2, and compare with data1
cmp $SD_DIR/data2 /var/data1
•
MicroSD card speed test
SD_DIR="/run/media/mmcblk1"
# SD write speed
dd if=/dev/zero of=$SD_DIR/test bs=1M count=1000 oflag=nocache
# SD read speed
dd if=$SD_DIR/test of=/dev/null bs=1M oflag=nocache
Summary of Contents for IBR115
Page 1: ...IBR115 NXP Cortex A9 i MX6 Dual Lite SoC User s Manual Version 1 0 Jan 2018...
Page 8: ...viii IBR115 User s Manual This page is intentionally left blank...
Page 15: ...General Information IBR115 User s Manual 7 1 1 7 Dimensions Unit mm...
Page 16: ...8 IBR115 User s Manual Unit mm Dimensions of the optional heatsink...
Page 20: ...12 IBR115 User s Manual 2 3 Jumper Connector Locations on IBR115 Board diagram of IBR115...
Page 39: ...31 Appendix This section provides the information of reference code...