yampp Discussion Board

Not tested nor compiled for ypod... just a first try... Would be nice if someone could add code to get song length in sec...

Reference used: http://www.id3.org/ID3v1

I did not include the comment field.. Easy to do, but is it worth the bits ?


Some nice place.. helpers.h ?

extern  char* pTitle;
extern  char* pArti;
extern  short sYear;
extern  char  cGenre;

At startup set all to NULL, ... main.c somewhere...

in helpers.c, function play_file

In the begining of function...

 char* pCBuffer;

An then after:

if (playstate.ps_fd != NULL)
   {
      iprintf("open ok\n");

  if (pTitle != NULL) free(pTitle);
  if (pArti != NULL) free(pArti);

if (fatlseek(playstate.ps_fd, -128, SEEK_END ) != 0) {
    pCBuffer = (char*)malloc(128);
FATFileRead(playstate.ps_fd, pCBuffer, 128);

     if (memcmp(pCBuffer, "TAG", 3) == 0) {
        pTitle = (char*)malloc(strlen(pCBuffer+3));
        strcpy(pTitle,pCBuffer+3);
        pArti = (char*)malloc(strlen(pCBuffer+33));
        strcpy(pArti, pCBuffer+33);
        sYear = ((pCBuffer[93]-48)*1000)+((pCBuffer[94]-48)*100)+((pCBuffer[95]-48)*10)+(pCBuffer[96]-48);
        cGenre = pCBuffer[127];
      }

free(pCBuffer);

}
fatlseek(fd,0,SEEK_SET);
}

/ToS

Hello
First some backround facts....

In hanggliding you use a altimeter with a variometer function, a device that tells you if you are going up or down and your altitude. (Pressure recalculated to a altitude).

I have built my own vario, using the Basic Stamp SX chip, a spi pressure sensor, 2line serial lcd, piezo summer. Some buttons to navigate and enable/disable functions.

In version 2 of the vario, i used a palm III as display, with a RS232 link between the stamp & palm.

Now, I was inspired by the yampp to migrate this proj. to ATMega, 3310 display, still using my spi pressure sensor, and adding a extra spi pressure sensor to meassure the airspeed.
A temp sensor (spi), and with an future option of adding gps onboard (oem solution, ttl or 232 com.), or via rs-232.

And to the q...

Is the letAtWork module a god platform to base my prodject at ? (I don't have the skills to make a circuit board/ Will use weroboard).

What else are needed to develop for the letAtWork module ?

My sensor operates at 3.3v, is it possible to use a 3.3v battery (mobile phone type) to feed the letAtWork module ?

The sound circuit in the existing design really sucks... A piezo summer with fixed freq. Just creating a pulsating sound when altitude increases, the time between the sound pulses reflects the rate. Is it a better solution to produce the sound with pwm ?

Hope for some input !

/Tomas (tos@fullyfledged.com)