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by erotavlas
Thu Dec 03, 2015 11:05 am
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: SPI with bluetooth BTM98-8AAm - CSR 8645 chip
Replies: 3
Views: 3106

Re: SPI with bluetooth BTM98-8AAm - CSR 8645 chip

Yes of course ls -l /dev/spi* crw-rw---- 1 root spi 153, 0 Dec 3 10:17 /dev/spidev0.0 crw-rw---- 1 root spi 153, 1 Dec 3 10:17 /dev/spidev0.1 Indeed, if I use the file ./spidev_test -D /dev/spidev0.0 from official documentation https://www.raspberrypi.org/documentation/hardware/raspberrypi/spi/READM...
by erotavlas
Mon Nov 23, 2015 5:50 pm
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: SPI with bluetooth BTM98-8AAm - CSR 8645 chip
Replies: 3
Views: 3106

Re: SPI with bluetooth BTM98-8AAm - CSR 8645 chip

Hi, I made some progress and I discovered that the command ./csrbt -y 150000 -f dump.bin requires sudo. Now I receive the error "can't send spi message" with ./csrbt -y 150000 -f dump.bin whereas with ./csrbt -y 150000 -f dump.bin -v with verbose I get "gpio now 0x%08x 0x%08x" on the video without a...
by erotavlas
Fri Nov 06, 2015 2:18 pm
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: SPI with bluetooth BTM98-8AAm - CSR 8645 chip
Replies: 3
Views: 3106

SPI with bluetooth BTM98-8AAm - CSR 8645 chip

Hi, I'm looking for a way to communicate via SPI with a bluetooth chip. The chip is KTT BTM98-8AAm and it contains the CSR 8645 module. My aims is to change the name of the bluetooth device. I'm new of SPI and I learnt that I can use raspberry pi in order to communicate. I found this interesting sit...
by erotavlas
Wed Oct 21, 2015 7:14 am
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: Class-D I2S amplifier
Replies: 18
Views: 6056

Re: Class-D I2S amplifier

Hi,
thank you for your fast reply. Do you know if exist a board with two TAS5756M?
Or can I trivially connect two separate boards two the same raspberry pi?
by erotavlas
Tue Oct 20, 2015 2:52 pm
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: Class-D I2S amplifier
Replies: 18
Views: 6056

Re: Class-D I2S amplifier

Hi, this is a very interesting project. I made a lot of search on the web with the aim to find a class AB amplifier with integrated DAC and I2S bus. Your solutions is a class D amplifier with at least 96 kHz and at least 100 SNR, but it lacks of 4 output channels of at least 20 W. I found some IC li...
by erotavlas
Tue Oct 20, 2015 9:34 am
Forum: Advanced users
Topic: [Guide] Pulseaudio 5 on Wheezy
Replies: 143
Views: 98421

Re: [Guide] Pulseaudio 5 on Wheezy

Exactly, what is you problem? Using bluez 5.23 or connecting to the external bluetooth hotspot?
I successfully installed pulseaudio 6.0 and latest bluez 5.35 and it works well.
by erotavlas
Fri Sep 11, 2015 3:34 pm
Forum: Advanced users
Topic: Linux kernel is now 4.0
Replies: 182
Views: 89904

Re: Linux kernel is now 4.0

Just FYI, that developer was me. 8-) Hi PhilE, I did not understand that you were the developer. However, thank you for your support. I finally found a free time slot in order to go on with my project. So I read the link that you provided for instantiating a I2C device https://www.kernel.org/doc/Do...
by erotavlas
Tue Jul 14, 2015 5:11 pm
Forum: Advanced users
Topic: Linux kernel is now 4.0
Replies: 182
Views: 89904

Re: Linux kernel is now 4.0

Thank you for all the information. I just opened and issue in order to add SND_SOC_ADAU1701 in standard Raspberry Pi kernel configurations as you suggested and a developer answered positively. In this way I can save time on compiling kernel. Regarding the second part of your answer, when I will have...
by erotavlas
Tue Jul 14, 2015 12:13 pm
Forum: Advanced users
Topic: Linux kernel is now 4.0
Replies: 182
Views: 89904

Re: Linux kernel is now 4.0

Hi, I'm looking for a support of a sound soc codec on Raspbian 8.0 Jessie. I tried to install the latest kernel 4.0 with rpi-update, but the module is not loadable even if modify the /etc/modules configuration file. In particular, I'm interested on sound soc codec adau1701 which is inside the kernel...
by erotavlas
Fri Jul 10, 2015 2:24 pm
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: STICKY: The I2S sound thread.
Replies: 923
Views: 453018

Re: I2S: Anyone got it running? (answer is yes!)

I run the MCLK_In of the ADAU from a 12.288MHz crystal for 48kHz. From this the ADAU creates his master clock and the LRCLK and BCLK which I put out on MP10+11. Since the ADAU needs those clocks on his serial input ports as well, I connect them to its MP4+5 ports (LRCLK_In and BCLK_In) and to the c...
by erotavlas
Thu Jul 09, 2015 5:06 pm
Forum: Advanced users
Topic: [Guide] Pulseaudio 5 on Wheezy
Replies: 143
Views: 98421

Re: [Guide] Pulseaudio 5 on Wheezy

Hi Douglas, I investigated more on my issue and I found the following. Both RPi 1 and RPi 2 work well and the blueagent5.py auto pairing script does the job. However, sometimes seems that the bluetooth interface is not powered on and I need to manually switch on it via bluetoothctl. When the interfa...
by erotavlas
Sun Jul 05, 2015 5:02 pm
Forum: Advanced users
Topic: [Guide] Pulseaudio 5 on Wheezy
Replies: 143
Views: 98421

Re: [Guide] Pulseaudio 5 on Wheezy

Hi Douglas, I repeated all the procedure many times and I found my mistake on loading Pulse Audio modules. Now I can confirm that Pulseaudio 6 on Raspberry Jessie 8.0 with BlueZ 8.31 with module-bluetooth-policy instead of udev rule works well on Raspberry Pi 1. Although, the same configuration with...
by erotavlas
Sat Jul 04, 2015 11:30 am
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: STICKY: The I2S sound thread.
Replies: 923
Views: 453018

Re: I2S sound: Anyone got it running? (answer is yes!)

New to this, looking for a bit of help. I have a B+ and am trying to interface it with my MiniDSP using I2S. I've read through everything i could find. The only real pin outs with explanations i could find were for using the P5 header. I saw one diagram and pic with pin outs for the B+, to connect ...
by erotavlas
Tue Jun 23, 2015 9:12 am
Forum: Advanced users
Topic: [Guide] Pulseaudio 5 on Wheezy
Replies: 143
Views: 98421

Re: [Guide] Pulseaudio 5 on Wheezy

Hi Douglas, I was able to install a working Pulseaudio 6 on Raspberry Jessie 8.0 with BlueZ 8.30 on both Raspberry Pi 1 and 2. Now, I repeated the installation procedure from scratch, but I cannot hear the audio. I'm able to connect via bluetooth the various devices with the automatic procedure that...
by erotavlas
Thu May 14, 2015 3:43 pm
Forum: Troubleshooting
Topic: Raspberry pi 1 & 2 different behaviour with OS image
Replies: 6
Views: 977

Re: Raspberry pi 1 & 2 different behaviour with OS image

Hi,
I definitely solved by upgrading the kernel of my raspbian to latest version 3.18.13 v7 and by using the following command to check for error

Code: Select all

sudo fsck -fyCM /dev/mmcblk0p1
sudo fsck -fyCM /dev/mmcblk0p3
by erotavlas
Wed May 13, 2015 7:50 am
Forum: Off topic discussion
Topic: Debian 8 Jessie Stable released 25th April 2015
Replies: 11
Views: 9584

Re: Debian 8 Jessie Stable released 25th April 2015

I'm also interested about this topic. When is Raspbian Jessie planned to be released?
Thank you
by erotavlas
Wed May 13, 2015 7:31 am
Forum: Troubleshooting
Topic: Wpa_cli, wpa_supplicant problem
Replies: 4
Views: 3742

Re: Wpa_cli, wpa_supplicant problem

Hi MrEngman,
I read the documentation, but it does contain information which I already know. I can use wpa_cli correctly in my PC with ubuntu 14.04 while in my raspberry pi with raspbian wheezy upgraded to jessie I cannot.
I'm looking on the web in order to figure out where is my mistake.
Thank you
by erotavlas
Tue May 12, 2015 7:36 am
Forum: Troubleshooting
Topic: Raspberry pi 1 & 2 different behaviour with OS image
Replies: 6
Views: 977

Re: Raspberry pi 1 & 2 different behaviour with OS image

Hi, I'm still experimenting the problem only with raspberry pi 2. I also tried to change the SD card and the power supply in order to exclude weird problems. However, even if I use fsck in the same way of raspberry pi 1, suddenly after a normal reboot I can obtain the same error: Welcome to emergenc...
by erotavlas
Tue May 12, 2015 7:26 am
Forum: Troubleshooting
Topic: Wpa_cli, wpa_supplicant problem
Replies: 4
Views: 3742

Re: Wpa_cli, wpa_supplicant problem

Hi Paccmpura,
thank you for your suggestions. I'm able to use wifi with wpa_supplicant file or by modifying /etc/network/interfaces file. Now, I'm looking for a way to use wpa_cli since I need it in a script.
by erotavlas
Mon May 11, 2015 1:00 pm
Forum: Troubleshooting
Topic: Wpa_cli, wpa_supplicant problem
Replies: 4
Views: 3742

Wpa_cli, wpa_supplicant problem

Hi, I installed Raspbian 7.5 and I upgraded it to Jessie 8.0 on my Raspberry pi. I have also a TP-Link TL-WN725N V2 with Realtek chip 8188eu correctly installed (kernel version 3.18.5+ #748). I would like to use wpa_cli but I cannot use it since I receive this error when I type wpa_cli in order to e...
by erotavlas
Mon May 11, 2015 12:34 pm
Forum: Troubleshooting
Topic: How is wpa_supplicant, wpa_cli, and systemd interacting?
Replies: 4
Views: 4374

Re: How is wpa_supplicant, wpa_cli, and systemd interacting?

Hi,
I have a similar problem with Raspbian 7.5 upgraded to Jessie 8.0. I have a TP-Link TL-WN725N V2 with Realtek chip 8188eu and I cannot use wpa_cli since I receive the same error as you

Code: Select all

Could not connect to wpa_supplicant: (null) - re-trying
Any suggestions?
by erotavlas
Wed May 06, 2015 11:02 am
Forum: Troubleshooting
Topic: Daemon for python script does not start at boot
Replies: 2
Views: 1418

Re: Daemon for python script does not start at boot

Thank you for your fast reply. I modified the indentation as you said, but nothing changed since in myscript file it was already ok. I took a look /etc/init.d/skeleton and I added the first block to myscript # PATH should only include /usr/* if it runs after the mountnfs.sh script PATH=/sbin:/usr/sb...
by erotavlas
Wed May 06, 2015 10:22 am
Forum: Beginners
Topic: TP-Link TL-WN725N V2 works out of the box on Raspbian
Replies: 236
Views: 346429

Re: TP-Link TL-WN725N V2 works out of the box on Raspbian

Thank you MrEngman as I supposed I have to modify the configuration files /etc/network/interfaces. Now I discovered that there are two way to connect to WiFi network. The first is to modify the configuration file /etc/network/interfaces as you described in your previous post while the second is to u...
by erotavlas
Wed May 06, 2015 9:20 am
Forum: Troubleshooting
Topic: Daemon for python script does not start at boot
Replies: 2
Views: 1418

Daemon for python script does not start at boot

Hi, my system is Raspbian Wheezy upgraded to Jessie (I know that the default system management of Jessie is systemd). However, I can still use /etc/rc.x to make a daemon script. So, I followed this guide http://blog.scphillips.com/posts/2013/07/getting-a-python-script-to-run-in-the-background-as-a-s...

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