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For first, I only know the SHARC, but maybe they work similar to your
DSP; I try to give you some ideas: regards Christoph > -----Ursprgliche Nachricht----- > Von: Ian [mailto:] > Gesendet: Mittwoch, 4. April 2001 17:38 > An: > Betreff: [adsp] Illegal multifunction instruction & a > DO-UNTIL query in > ADSP 2181 > Q1 - My assembler is telling me that the following > instruction is an illegal > multifunction > but I can't see anything wrong, and the processor manual > implies that it > should be possible > > MR = MR + MX0 * MX0 (SS), MX0 = DM(I0, M1); may be you should check if your MX0 is part of the accumulator. As far as I know only registers can be used for multiplikations. Moreover you could check if it's possible to do a quadrature with this ASM command. > > Any comments ? > > Q2 - I have a loop construct of the following form > > CNTR = 15; > DO loop UNTIL CE; > xxxxxx; > IF NOT CE JUMP DecCntr; > JUMP Quit2; on SHARC's you need a suffix to jump out of a loop. It's JUMP _somewhere (LE); > > DecCntr: xxxxxx; > xxxxxx; > loop: xxxxxx; > > Quit1: {a normal loop exit} > RTS; > > Quit2: {alternative loop exit} > RTS; > > Where xxxx indicate irrelevant code in this example. > > The question is what POPs (if any) should occur at the Quit2 point ? > The processor manual is a bit vague on what gets POPed by IF > NOT CE when it > does not jump. > I have assumed that the Quit2 line should execute a POP PC, POP LOOP; > instruction > which seems to work ok. |
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AW: Illegal multifunction instruction & a DO-UNTIL query i n ADSP 2181
Started by ●April 5, 2001
Reply by ●April 6, 20012001-04-06
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Hi! This is my hardware setup: ADSP 21065L SHARC EZ-KIT LITE AMPLIFIED SPEAKERS DYNAMIC MICROPHONE (stereo jack and mono jack) I ran the talktrhru demo but when I speak into the microphone, no sound is heard from the speakers. I have tried setting JP1 and JP2 to MIC. I have also tried the software method but to no avail... Is the problem because my microphone generates a voltage too small? I think it generates only 3mV Vrms. Has anyone successfully ran the talkthru demo using ordinary (cheap) PC dynamic microphones? Thanks! --emer |
