SI468x DAB Receiver modules and design files

To compile modules install kernel headers

sudo apt-get install -y raspberrypi-kernel-headers

then run

sudo install.sh

and reboot, that's it. Take care of the Device-Tree

Without a PLL not all MCLK and BCLK combinations are supported

add the alsa configuration

sudo cp /home/pi/rpi-receiver-linux-rpi-*/asound.conf /etc/

SI468x Firmware

unfortunately the firmware is closed source. You can buy an EVAL Board to get old ones (that is what I did). Copy files:

sudo cp -r /home/pi/rpi-receiver-linux-rpi-*/si468x /lib/firmware

You can copy the files to the connected EEPROM:

echo fm | sudo tee /sys/devices/platform/soc/*.i2c/i2c-1/1-0064/si468x_nvram

copies the fm firmware referenced from the devicetree to the nvram

Tuning

You can use the v4l2 tools

v4l2-ctl -d /dev/radio0 --set-freq=88.80

tunes to FM 88.8MHz.

Search next station

v4l2-ctl -d /dev/radio0 --freq-seek=dir=1,wrap=1 && v4l2-ctl -d /dev/radio0 --get-freq

Adjusting volume

v4l2-ctl -d /dev/radio0 --set-ctrl volume=63

sets the volume and activates the analog output of the SI468x

Tuning to DAB

simply use a frequency in the DAB Band

v4l2-ctl -d /dev/radio0 --freq-seek=low=187.072,high=3412,spacing=0 && cat /sys/devices/platform/soc/*.i2c/i2c-1/1-0064/si468x_service_list

will also print a service list

Service List:

MHz	Service ID	SubChId	FIC	Strength	Country	Version	started	Label
187.072	3153	2	100	43	10	46	-	ENERGY
187.072	989	1	100	43	10	46	-	R.Maria
187.072	3416	10	100	43	10	46	-	WELLE 1
187.072	3154	9	100	43	10	46	-	Stephans Klassik
187.072	3413	12	100	43	10	46	-	Mein Kinderradio
187.072	3364	8	100	43	10	46	-	ERF Plus
187.072	3370	7	100	43	10	46	-	Technikum ONE
187.072	3367	6	100	43	10	46	-	Rock Antenne
187.072	3414	3	100	43	10	46	-	j▒.live
187.072	3143	5	100	43	10	46	-	* 88.6 *
187.072	3412	0	100	43	10	46	*	ARABELLA RELAX
187.072	3411	11	100	43	10	46	-	KLASSIK RADIO

use MHz for the low and Service ID for the high argument to tune with v4l2-ctl

Get the dynamic label

cat /sys/devices/platform/soc/*.i2c/i2c-1/1-0064/si468x_dynamic_label

ToDo

• in Austria DAB is broadcasted on a single band - never tried two bands....
• HF receiver circuit needs to be tuned - needs time and equipment!
• Charset is not converted (j▒.live should be jö.live), but I do not know if this makes sense in the module