Difference between revisions of "MAX9768"
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==Driver installation== | ==Driver installation== | ||
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Latest revision as of 17:09, 4 September 2013
How to use the MAX9768 class D audio amplifier
Before installing the driver, the plateforme file (ie apf27-dev.c) has to be correctly modified to support the MAX9768 i2C chip.
Driver installation
$ make linux-menuconfig
Device Drivers--->
Armadeus specific drivers --->
<M> Armadeus Max9768 Audio Amplifier
$ make
Update the APF27 board with the new Linux kernel and rootfs.
Usage
- Load the module:
# modprobe max9768
- Power on the IC:
# echo 0 > /sys/class/i2c-dev/i2c-(x)/device/0-004(y)/shutdown
Where x is the I2C bus number (0 or 1) and y the i2C address of the chip
- Mute off:
# echo 0 > /sys/class/i2c-dev/i2c-(x)/device/0-004(y)/mute
- Change volume:
# echo 50 > /sys/class/i2c-dev/i2c-(x)/device/0-004(y)/volume
Remark: 0 <= volume value < 64
