mp3設(shè)計(jì)程序資料，采用c語(yǔ)言編寫(xiě)。
README file for
yampp-3 source code 2001-05-27
This is the current state of the yampp-3 source code, 2001-05-27.
This code is intended to run on Rev. B of the yampp-3 PCB, but can
ofcourse be used on compatible systems as well.
It still uses the "old" song selection system as the yampp-2.
However, the disk handling routines has improved a lot and the
obviosly, the new VS1001 handling has been put in.
The codesize is almost at it s maximum at 1F40 bytes.
A .ROM file is included if you don t have the compiler set up.
For now, the documentation is in the code
用LPC213X系列的PWM來(lái)產(chǎn)生語(yǔ)音。語(yǔ)音數(shù)據(jù)來(lái)源于PC機(jī)轉(zhuǎn)換后得到的。最大可以是16位的。
由于是PWM所以輸出端口需要低通濾波才能夠得到比較干凈的聲音。
可以經(jīng)過(guò)修改使用LPC2132以上的ARM的D/A來(lái)產(chǎn)生。
This project outputs audio on PWM0 using wave samples that are stored in the on-chip Flash ROM.
This is an example how one could hide a process on Windows based
operation systems from task viewers like ProcDump (G-RoM, Lorian
& Stone) or ProcessExplorer (SysInternals).
It could e.g. be used as some kind of dump protection.
The way to get this done is very different on NT and 9x machines.
