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Running on a rpi 3b, running Debian 12 Wormbook, Linux 6.1.0-rpi7-rpi-v8 aarch64.
I've addedgpu_mem=250 to /boot/config.txt.
I built successfully but when trying to run, the program instantly exits 'cleanly' afterOutputting signal on GPIO 4, no matter what arguments I use :
pi@raspberrypi:~/PiFmAdv/src $ sudo ./pi_fm_advCarrier: 87.60 Mhz, VCO: 1138.8 MHz, Multiplier: 59.312500, Divider: 13Allocating physical memory: size = 4354048, mem_ref = 9, bus_addr = fe6df000, virt_addr = 0x7f8a929000Master PLLC LockedOutputting signal on GPIO 4.Terminating: cleanly deactivated the DMA engine and killed the carrier.pi@raspberrypi:~/PiFmAdv/src $ sudo ./pi_fm_adv --audio /home/pi/.mpd/audio.fifo --freq 88.0Carrier: 88.00 Mhz, VCO: 1144.0 MHz, Multiplier: 59.583333, Divider: 13Allocating physical memory: size = 4354048, mem_ref = 9, bus_addr = fe6df000, virt_addr = 0x7f7fa49000Master PLLC LockedOutputting signal on GPIO 4.Terminating: cleanly deactivated the DMA engine and killed the carrier.After running either of these commands, with a radio tuned to the right freq, it makes the white noise go away, until I reboot the rpi.
I can play and hear the sound file fine withaplay via the jack output.
I've checked for modules that use the GPIO, but found none.
Is there something else I should be trying ? How can I get a more verbose output ? Any idea ?
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