Hi! I'm making D-CLASS amplifier for Linux platform... I have to connect computer to radio at school, that would play music on breaks. The computer would be connected to a radio speakers-network thru a D-class amplifier built on few mosfet transistors and output power of few hundred of watts. That's my diplom work.
The simplified model of amplifier's work is that we're generating high frequency square signal with controlled pulse width. By controlling width of pulse we're controlling average Voltage on speaker - position of membrain. I made such circuit on AT89C52 microcontroller, but chip is too slow for that job. So I've diecided to use PC as a "fast microcontroller". But why not to write kernel module - the PC would stand on Linux. So I have to write special driver for this amplifier. I think that writting it in assembly language would be the fastest choice. The speed is critical - I have to generate a signal of frequency more than 1MHz (or more - faster output frequency = better sound). I also, with sampling frequency of 11kHz/22kHz/44kHz, have to take samples form /dev/dsp (or some other sound output) and give them to output (serial port). As a person, who never wrote a kernel module, or even time sensitive program for Linux, I'm asking for help someone that would surely know the solution - that means YOU :) I'd like not to invoke any libraries to program (totally platform independecy). Few bytes of low-level (kernel) machine code will be enough (I wrote already the program, but the microcontroller is too slow). As for now I have one question - are there some timer functions in kernel? The rest afer reading howto about writting modules ;) If I finish it, lets make it part of ALSA project...? Thanks! CeDeROM/KSZAK _______________________________________________ Alsa-devel mailing list [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/alsa-devel
