COC Installation

CC1101 Onewire Clock Installation

Mounting

Onewire

Make sure i2c is active! You need to add to /boot/config.txt:

dtparam=i2c_arm=on

load (you may add module to /etc/modules) or:

sudo modprobe i2c_dev

To access the 1Wire bus do:

sudo apt-get install owfs

edit /etc/owfs.conf to:

#server: FAKE = DS18S20,DS2405 server: i2c = ALL:ALL

restart service and have a look:

sudo /etc/init.d/owserver restart sudo /etc/init.d/owhttpd restart

browse to http://ip_or_raspberry:2121

sudo owfs —i2c=ALL:ALL —allow_other /mnt/ ls /mnt

RTC

The extension ist equipped with an backed up Real Time Clock. It stores its energy in an on-board supercapacitor. This will last for about 3 days. access the RTC by:

sudo echo ds1307 0x68 > /sys/class/i2c-adapter/i2c-1/new_device sleep 2 sudo hwclock

setting RTC by:

sudo hwclock -w

set system time from RTC during startup (i.e. in /etc/rc.local):

sudo hwclock -s

Than let Raspberry know that we have a real-Time-clock:

sudo apt-get remove fake-hwclock sudo rm /etc/cron.hourly/fake-hwclock sudo update-rc.d -f fake-hwclock remove sudo rm /etc/init.d/fake-hwclock sudo update-rc.d hwclock.sh enable

Modul connector

RPis serial port /dev/ttyAMA0 is directly connected to modul. Other assignments as below:

RPI3 + JESSIE:

add to: /boot/config.txt dtoverlay=pi3-miniuart-bt

change: /boot/cmdline.txt dwc_otg.lpm_enable=0 console=tty1 root=/dev/mmcblk0p2 rootfstype=ext4 elevator=deadline fsck.repair=yes rootwait

commands to issue: sudo systemctl stop serial-getty@ttyAMA0.service sudo systemctl disable serial-getty@ttyAMA0.service sudo reboot

This modules uses Low-Level RESET pin. To enable those you must pull RESET HIGH by doing:

sudo echo 22 > /sys/class/gpio/export sudo echo out > /sys/class/gpio/gpio22/direction sudo echo 1 > /sys/class/gpio/gpio22/value

Bootload PIM

    if test ! -d /sys/class/gpio/gpio22; then echo 22 > /sys/class/gpio/export; fi
    echo out > /sys/class/gpio/gpio22/direction
    echo 0 > /sys/class/gpio/gpio22/value

    if test ! -d /sys/class/gpio/gpio27; then echo 27 > /sys/class/gpio/export; fi
    echo out > /sys/class/gpio/gpio27/direction
    echo 0 > /sys/class/gpio/gpio27/value

    echo 1 > /sys/class/gpio/gpio22/value
    sleep 1
    echo 1 > /sys/class/gpio/gpio22/value
    echo in > /sys/class/gpio/gpio27/direction
    echo 27 > /sys/class/gpio/unexport

EEPROM

The configuration EEPROMs are available at:

• PIGATOR board EEPROM -> sudo hexdump /sys/class/i2c-adapter/i2c-1/1-0057/eeprom
• MODUL SLOT EEPROM -> sudo hexdump /sys/class/i2c-adapter/i2c-1/1-0050/eeprom The EEPROMs are write protected, programmed at manufacture - but currently mostly empty… You might need to load proper kernel driver before accessing the EEPROMs:

echo “24c02 0x50” > /sys/class/i2c-adapter/i2c-1/new_device echo “24c02 0x57” > /sys/class/i2c-adapter/i2c-1/new_device