Posted on April 09, 2018 at 13:34Hi, i am using CR95H RFID CLICK module with raspberry pi3.I am using UART for communication.
I connected,
SSI_1 => GND
SSI_0 => GND
TX => RX
RX => TX
VIN => 3.3X
GND => GND.
for waking up i am sending 0x00 and then i send echo cmd but i didnt any response.can any one help me out i new to these modules
#include<bcm2835.h>
#include <string.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <termios.h>
#include <sys/ioctl.h>
#include<stdio.h>
uint8_t buf2[11],buf1;
void send_data(uint8_t buf1)
{
int fd;
fd = open('/dev/ttyS0', O_RDWR, O_NOCTTY);
fd = write(fd, &buf1, 11);
if (fd == -1) {
printf('failed to write the file');
}
usleep(100000);
close(fd);
}
void recv_data()
{
int fd;
fd = open('/dev/ttyS0', O_RDWR, O_NOCTTY);
if (fd == -1) {
printf('failed to open the file');
}
fd = read(fd, buf2, 17);
if(buf2[0]==0x55)
{
printf('ECHO');
}
printf('%x', buf2);
close(fd);
}
int main(void)
{
bcm2835_init();
delay(10);
send_data(0x00);
usleep(10);
for(int i=0;i<10;i++)
{
send_data(0x55);
recv_data();
delay(50);
}
}
