Raspberry Si4688 FM / DAB+ Receiver
Original Project from Bjoern Biesenbach, see https://github.com/elmo2k3/dabpi_ctl
13.12.2016 - added FM functionality
10.12.2016 - initial github project, only DAB implemented, contributors welcome
Step 1: patch kernel to get I2S Audio Record Device for Si468x
patch -p 1 < 0001-Added-support-for-Si468x-Digital-Radio-Receiver-DABP.patchFollow kernel build instructions at https://www.raspberrypi.org/documentation/linux/kernel/building.md
To enable the Si4688 driver execute (for cross-compiling)
make ARCH=arm CROSS_COMPILE=arm-linux-gnueabihf- bcm2709_defconfig
make ARCH=arm CROSS_COMPILE=arm-linux-gnueabihf- menuconfiggo to "Device Drivers" --> "Sound Card Support" --> "Advanced Linux Sound Architecture" --> "Alsa for SoC Audio Support"
say "module" for "Support for DABPi featuring a Si4688 FM/FMHD/DAB receiver"
Compile and install the kernel + modules, add following lines to /boot/config.txt
dtparam=i2s=on
dtparam=spi=on
dtoverlay=rpi-dabpiThen reboot. On success you should see correct I2S initialization and a new alsa recording source:
root@pidev:~# dmesg |grep i2s
[ 6.411170] snd-rpi-dabpi soc:sound: si468x-hifi <-> 3f203000.i2s mapping ok
root@pidev:~# arecord -l
**** List of CAPTURE Hardware Devices ****
card 0: sndrpirpidabpi [snd_rpi_rpi_dabpi], device 0: DABPi Hifi si468x-hifi-0 []
Subdevices: 0/1
Subdevice #0: subdevice #0Step 2: compile Si4688 controller software
git clone https://github.com/teknoid/dabpi
cd dabpi
make clean && makeStep 3: place firmware in ../si46xx_firmware/
root@pidev:/anus/si46xx_firmware# ls -la
total 2040
drwxr-xr-x 2 hje hje 4096 Dec 9 2016 .
drwxrwxr-x 5 root users 4096 Dec 10 2016 ..
-rw-r--r-- 1 hje hje 517708 Aug 15 2014 dab_radio_3_2_7.bif
-rw-r--r-- 1 hje hje 521448 Dec 9 2015 dab_radio_5_0_5.bin
-rw-r--r-- 1 hje hje 493128 Aug 15 2014 fmhd_radio_3_0_19.bif
-rw-r--r-- 1 hje hje 530180 Dec 2 2015 fmhd_radio_5_0_4.bin
-rw-r--r-- 1 hje hje 5796 Nov 9 2012 rom00_patch.016.binEnter DAB+ mode
root@pidev:/anus/dabpi# ./dabpi_ctl -a
dabpi_ctl version v0.01-43-g369d8de
POWER_UP:
0000 00 80 00 00 80 .....
LOAD_INIT:
0000 00 80 00 00 80 .....
HOST_LOAD:
0000 00 80 00 00 80 .....
...
HOST_LOAD:
0000 00 80 00 00 80 .....
HOST_LOAD:
0000 00 80 00 00 80 .....
BOOT:
0000 00 80 80 00 c0 .....
GET_SYS_STATE:
0000 00 80 80 00 c0 02 ff .......
Current mode:
DAB is active
GET_PART_INFO:
0000 00 80 80 00 c0 00 00 00 00 50 12 00 00 00 00 50 .........P.....P
0010 12 00 00 00 00 01 00 .......
SET_PROPERTY:
0000 00 80 80 00 c0 .....
SET_PROPERTY:
0000 00 80 80 00 c0 .....
SET_PROPERTY:
0000 00 80 80 00 c0 .....
SET_PROPERTY:
0000 00 80 80 00 c0 .....
Set Frequency depending on your Region (0 - 16) - example for South Tyrol
root@pidev:/anus/dabpi# ./dabpi_ctl -j 15
dabpi_ctl version v0.01-43-g369d8de
DAB_SET_FREQ_LIST:
0000 00 80 80 00 c0 .....
Tune to DAB channel
root@pidev:/anus/dabpi# ./dabpi_ctl -i 0
dabpi_ctl version v0.01-43-g369d8de
DAB_TUNE_FREQ:
0000 00 81 80 00 c0 .....
Get ensemble information
root@pidev:/anus/dabpi# ./dabpi_ctl -g
dabpi_ctl version v0.01-43-g369d8de
DAB_GET_DIGITAL_SERVICE_LIST:
0000 00 81 80 00 c0 56 01 .....V.
List size: 342
List version: 36
Services: 12
Nr | Service ID | Service Name | Component IDs
--------------------------------------------------
00 | 42f1 | RAS Swiss Pop+ | 11
01 | 42f2 | RAS SwissClassic | 10
02 | 43e2 | RAS RSI Rete 2+ | 12
03 | 5203 | Rai Radio3+ | 3
04 | 5301 | Rai Radio1+ TAA | 1
05 | 5302 | Rai Radio2+ TAA | 2
06 | 5304 | RAI SUEDTIROL+ | 4
07 | d220 | RAS DKULTUR+ | 9
08 | d313 | RAS BAYERN 3 | 5
09 | d314 | RAS BR-KLASSIK | 6
10 | d315 | RAS B5 aktuell | 7
11 | df95 | RAS KIRAKA+ | 8 Start one of the services in ensemble
root@pidev:/anus/dabpi# ./dabpi_ctl -f 0
...
Starting service RAS Swiss Pop+ 42f1 b
DAB_START_DIGITAL_SERVICE:
0000 00 81 80 00 c0 .....Start alsa playback
ssh hje@pidev 'arecord -D hw:0,0 -f dat -' | aplay -f dat -Enjoy the music ;-)