Solved
CR95H UART
Posted on April 09, 2018 at 13:34
Hi, 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); } }