Kommentar: Einfügen von HTML im Kommentar: Link einfügen: <a href="LINKURL" target="_blank">LINKTITEL</a> Bild einfügen: <img src="BILDURL"> Text formatieren: <b>fetter Text</b> <i>kursiver Text</i> <u>unterstrichener Text</u> Kombinationen sind auch möglich z.B.: <b><i>fetter & kursiver Text</i></b> C Quellcode formatieren: <code>Quellcode</code> BASIC Quellcode formatieren: <basic>Quellcode</basic> (Innerhalb eines Quellcodeabschnitts ist kein html möglich.) Wichtig: Bitte mache Zeilenumbrüche, bevor Du am rechten Rand des Eingabefeldes ankommst ! -> I > Hi Torsten, > > I hoped you would respond. I think with your example I can now write the assembler code > to store recorded data via SPI in extra SRAM and play it back again. > > In the mean time I have written in assembler a 'proof of principle' program. I have been able > to record and play back 0.27 s of sound with the limited 4k SRAM of the robot. I had to make > a small adaptation to the hardware to transform the PWM signal into a proper audio signal > for the speaker. A high off filter consisting of an elco, a capacitor and an inductor sufficed, > though the sound volume is rather low. > > It will cost me some time to add the extra SRAM to the robot. Port B0 (SS) is already used to > drive the wheel encoder LEDs so this must be changed. I plan to use 128 kB Non Volatile > SRAM (23LCV1024-I/P from Conrad) together with a coin cell to save the data when the > batteries of the robot are empty or removed, and this must all find a place as close to the > processor as posible. > > I'll let you know the results or when any questions arise. Thanks for your help. > Regards, > Pepe
