FILE *bin;
bin=fopen("header.bmp", "a");
int fd_22=open("/sys/class/gpio/gpio22/value", O_WRONLY);
for(k=0; k<153600; k++){
fd_45=open("/sys/class/gpio/gpio45/value", O_RDONLY);
fd_44=open("/sys/class/gpio/gpio44/value", O_RDONLY);
fd_23=open("/sys/class/gpio/gpio23/value", O_RDONLY);
fd_26=open("/sys/class/gpio/gpio26/value", O_RDONLY);
fd_47=open("/sys/class/gpio/gpio47/value", O_RDONLY);
fd_46=open("/sys/class/gpio/gpio46/value", O_RDONLY);
fd_27=open("/sys/class/gpio/gpio27/value", O_RDONLY);
fd_65=open("/sys/class/gpio/gpio65/value", O_RDONLY);
write(fd_22, "0", 1);
write(fd_22, "1", 1);
bit_value=0;
read(fd_45, &ch0, 1);
read(fd_44, &ch1, 1);
read(fd_23, &ch2, 1);
read(fd_26, &ch3, 1);
read(fd_47, &ch4, 1);
read(fd_46, &ch5, 1);
read(fd_27, &ch6, 1);
read(fd_65, &ch7, 1);
ch0 -= '0';
ch1 -= '0';
ch2 -= '0';
ch3 -= '0';
ch4 -= '0';
ch5 -= '0';
ch6 -= '0';
ch7 -= '0';
if(ch0) {bit_value |= (1<<0);}
if(ch1) {bit_value |= (1<<1);}
if(ch2) {bit_value |= (1<<2);}
if(ch3) {bit_value |= (1<<3);}
if(ch4) {bit_value |= (1<<4);}
if(ch5) {bit_value |= (1<<5);}
if(ch6) {bit_value |= (1<<6);}
if(ch7) {bit_value |= (1<<7);}
fprintf(bin , "%c", bit_value);
close(fd_45);
close(fd_44);
close(fd_23);
close(fd_26);
close(fd_47);
close(fd_46);
close(fd_27);
close(fd_65);
}
I making the camera from the Beagle bone black
but, My source is very slow
fopen fclose is because repeat in for(; ; )
So I want to improve the speed.
what should i do ?
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