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F5OEO / rpitx

RF transmitter for Raspberry Pi
GNU General Public License v3.0
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NFM, AM, SSB not working in easytest #145

Closed Toni43 closed 5 years ago

Toni43 commented 5 years ago

Hello. NFM, AM, and SSB modulation do not work in easytest.sh When I start any of this modulations, only a very short carrier is transmitted to the air, and then silence. I use: Raspberry B+ v1.2, Linux raspberrypi 4.14.79+ #1159 Sun Nov 4 17:28:08 GMT 2018 armv6l GNU/Linux

I tried to do this: _(while true; do cat sampleaudio.wav; done) | csdr convert_i16_f | csdr fir_interpolate_cc 2 | csdr dsb_fc | csdr bandpass_fir_fft_cc 0.002 0.06 0.01 | csdr fastagcff | sudo ./sendiq -i /dev/stdin -s 96000 -f 144500000 -t float But it works the same way

Output is -

_pi@raspberrypi:~/rpitx $ (while true; do cat sampleaudio.wav; done) | csdr convert_i16_f | csdr fir_interpolate_cc 2 | csdr dsb_fc | csdr bandpass_fir_fft_cc 0.002 0.06 0.01 | csdr fastagc_ff | sudo ./sendiq -i /dev/stdin -s 96000 -f 144500000 -t float Channel 14 CBSize 64000 UsermemSize 48000 Using mbox device /dev/vcio. 2240000 Size NUM PAGES 547 PAGESIZE 4096 BufferSize 16000 , cb 64000 user 48000 Found PLL solution for frequency 144.5MHz : divider:11 VCO: 1589.5MHz Master PLLC Locked PCM prediv = 10 PCM clk=520 / 3413 Loop parameter =1a0000 End of file

F5OEO commented 5 years ago

Do you have the line GPU_FREQ=250 in /boot/config.txt ?

Toni43 commented 5 years ago

No, there is no this line in /boot/config.txt I have only this

core_freq=250

F5OEO commented 5 years ago

Install.sh include : echo "Set GPU to 250Mhz in order to be stable" LINE='gpu_freq=250' FILE='/boot/config.txt'

If you haven't used install.sh or answer no at the last question , you need to add gpu_freq=250 in /boot/config.txt

Toni43 commented 5 years ago

Ok, thanks. Now it work.

steve2162 commented 1 year ago

Hi, I've got the same issues as toni43. It works ok on an RPI3, but I need to use that on Gqrx for receive so I thought I'd use a spare PI2 I have. It gives exactly the same symptoms as toni43. When I try to use ./testssb.sh or ./testnfm.sh it repeats "Illegal instruction" four times then "Peri Base = 20000000 SDRAM 40000000". I get a single 0.5 second burst of carrier then nothing. Both PI's are on "Raspbian GNU/Linux 11 (bullseye)" wide band FM,rtty and more all work as expected. The /boot/config.txt does have an entry of "core_freq=250 sdram_freq=400 over_voltage=0 gpu_freq=250 force_turbo=1" Can you shed any light on this pease ? Regards Steve W. (G8FGB)