Difference between revisions of "Rtc"
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(Created page with "Load the I2C and RTC drivers as root: modprobe i2c-dev modprobe i2c:mcp7941x echo mcp7941x 0x6f > /sys/class/i2c-dev/i2c-0/device/new_device To write the system time to th...") |
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echo mcp7941x 0x6f > /sys/class/i2c-dev/i2c-0/device/new_device |
echo mcp7941x 0x6f > /sys/class/i2c-dev/i2c-0/device/new_device |
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hwclock -s |
hwclock -s |
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Source: http://www.element14.com/community/message/63885 |
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Revision as of 16:37, 27 March 2013
Load the I2C and RTC drivers as root:
modprobe i2c-dev modprobe i2c:mcp7941x echo mcp7941x 0x6f > /sys/class/i2c-dev/i2c-0/device/new_device
To write the system time to the RTC (you might need to run this command twice, when you use the RTC for the first time):
hwclock -w
Read out the RTC, and print the date and time to your console:
hwclock
Read out the RTC, and adjust system time:
hwclock -s
To automatically do this on startup, add the following lines to /etc/rc.d/rc.local
modprobe i2c-dev modprobe i2c:mcp7941x echo mcp7941x 0x6f > /sys/class/i2c-dev/i2c-0/device/new_device hwclock -s