all: hello

CROSS=armv5l-linux-uclibc
CXX= $(CROSS)-g++

clean:
rm -f hello

hello: hello.cpp
$(CXX) hello.cpp -o hello

# ./hello
ARM

all: hello

CROSS=arm-none-linux-gnueabi
CC= $(CROSS)-gcc

clean:
rm -f hello

hello: hello.c
$(CC) hello.c -o hello

[@SK-MAT91SAM9 q]$ls
hello
[@SK-MAT91SAM9 q]$./hello
-ash: ./hello: not found

$(CC) hello.c -static -o hello

arm-none-linux-gnueabi-gcc -static hello.c -o hello

arm-none-linux-gnueabi-gcc hello.c -o hello

#include <stdio.h>
#include <fcntl.h>
#include <stdlib.h>
#include <string.h>
#include <sys/mman.h>
#include <unistd.h>
//-------------------------------------------------------------
int main(void)
{
int fd_adc0;
unsigned char adcBuffer[2];
unsigned int adcValue;
int nData;
float mV;
//
printf( "adc rev 1.01 03/14/2009
");
//
if ((fd_adc0 = open("/dev/adc0", O_RDONLY)) == -1)
{
fprintf(stderr, "
Can't open /dev/adc0");
return -1;
}
for ( ;;)
{
nData = 2;
nData = read(fd_adc0,&adcBuffer,nData);
adcValue = adcBuffer[1];
adcValue <<=8;
adcValue |= adcBuffer[0];
//
mV = (adcValue * 3.0) / 1023.0;
printf( "nData=%02X adcValue=%04d mV=%5.2fmV
",nData,adcValue,mV);
usleep(1000000);
}
printf( "
" );
close(fd_adc0);
return 0;
}

...
0002
0082
0002
007f
0002
007d
0002
007e
0002
0082
0002
007f
0002
007e
0002
0080
0002
0081
...

#include <stdio.h>
#include <stdlib.h>
int main(void)
{
FILE* f;
int chr;
f=fopen("/dev/adc0","r");
while (1)
{
chr=fgetc(f);
printf("%04x
", chr);
}

}