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Howto utilize the buzzer on the Zaurus
1) Intro
The Sharp Zaurus doesn't have a built in speaker, but it does have a a
"buzzer" type audio device. This audio device can make rudimentary sound
as defined in "sharp_char.h"
2) Basics
If you wish to use the buzzer in your application you need to do at least
the following three things:
Include sharp_char.h into your application to use the defines. The
header is installed in : /opt/Embedix/tools/arm-linux/include/asm/ so you
may want to manually copy the file locally or create a sym-link to the file into the local directory.
#include <sharp_char.h>
Open /dev/sharp_buz. Use normal error checking here.
int fd= open("/dev/sharp_buz", O_WRONLY);
Make an ioctl cal on /dev/sharp_buz replacing SHARP_BUZ_TOUCHSOUND with
your desired sound from sharp_char.h
ioctl(fd, SHARP_BUZZER_MAKESOUND, SHARP_BUZ_TOUCHSOUND);
There's only 3 sounds that have any actual data to send through the buzzer
device. (Until they add them to the device driver). The warning sound and alarm sound are the same.
#define SHARP_BUZ_TOUCHSOUND 1 /* touch panel sound */
#define SHARP_BUZ_KEYSOUND 2 /* key sound */
#define SHARP_PDA_WARNSOUND 4 /* warning occurred */
#define SHARP_BUZ_SCHEDULE_ALARM 11 /* schedule alarm */
3) Example
Download example source and binary in a tar.gz file here.
This test program will open the driver and cycles through all the buzzer
sounds. (Make sure to compile it for arm so you can run it on the Zaurus)
Create the makefile with:
# tmake -o Makefile buz.pro
Then build the binary:
# make
Once it is done compiling copy the binary (buz) to the Zaurus and run from
command line to hear the results.
---- buz.c -----
#include <sys/stat.h>
#include <fcntl.h>
#include <sys/types.h>
#include <stdio.h>
#include <sys/ioctl.h>
#include <unistd.h>
#include <sharp_char.h>
int main(){
int stat, fd;
int i;
fd= open("/dev/sharp_buz", O_WRONLY);
if(fd == -1){
perror("/dev/sharp_buz");
return(1);
}
for(i=1;i<=14;i++){
printf("Sound: %d\n", i);
stat= ioctl(fd, SHARP_BUZZER_MAKESOUND, i);
if(stat == -1){
perror("ioctl");
}
tcdrain (fd);
}
close(fd);
return(0);
}
--- buz.pro ----
TEMPLATE = app
#CONFIG = qt warn_on debug
CONFIG = qt warn_on release
SOURCES = buz.c
TARGET = buz
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