Linux Programming

for (i = 0; i < num_rsp; i++) {
            // convert bdaddr to array addr for print
    ba2str(&(ii + i)->bdaddr, addr);  FAILS HERE
    memset(name, 0, sizeof(name));
    if (hci_read_remote_name(dev_descriptor, &(ii + i)->bdaddr,
            sizeof(name), name, 0) < 0)
        strcpy(name, "[unknown]");
    printf("remote address  %s  remote name  %s\n", addr, name);
}

Bluetooth addresses are a 6-byte hex number similar to an Ethernet MAC address. BlueZ provides convenience functions for converting between a 6-byte string in the format 00:11:22:33:44:55 and the bdaddr_t struct. Here are the function prototypes:

    int ba2str(const bdaddr_t *ba, char *str);
    int str2ba(const char *str, bdaddr_t *ba);

The function ba2str converts from the internal bdaddr_t to a zero-terminated string (the str parameter should have at least 18 bytes), and str2ba provides the opposite conversion. The first example makes use of the ba2str function. 

"cast looses precision " 

"cast looses precision " errors

"cast looses precision "

Description	Resource	Path	Location	Type
cast from ‘uint32_t* {aka unsigned int*}’ to ‘uint32_t {aka unsigned int}’ loses precision [-fpermissive]	CBCM2835SPITFT.cpp	/RPI_BT_SERVER_X86_/src/MODULES/M_BCM2835_SPI_TFT	line 21264	C/C++ Problem

bcm2835_peripherals = (uint32_t*) mapmem(
NULL, bcm2835_peripherals_size,             // 100000
        _memfd, (uint32_t) bcm2835_peripherals_base);

RPI_BT_SERVER _X86 
date version Feb 28 2020
test time 10:17:50
 BRAEK @line 333
STATUS allocate socket : Success
STATUS close socket : Invalid argument
STATUS reallocate socket : Invalid argument this is the issue 
STATUS bind : Address already in use
STATUS listen : File descriptor in bad state
STATUS accept : File descriptor in bad state
accepted connection from 00:00:00:00:00:00

<pre>	struct sockaddr_rc loc_addr = { 0 }, rem_addr = { 0 };
	char buf[1024] = { 0 };
	int socket_fd, client_fd, bytes_read;
	socklen_t opt = sizeof(rem_addr);

	// allocate socket
	socket_fd= socket(AF_BLUETOOTH, SOCK_STREAM, BTPROTO_RFCOMM);
	perror("STATUS allocate socket ");

	// close socket
	close(socket_fd);
	perror("STATUS close socket ");
	// re allocate socket
	socket_fd = socket(AF_BLUETOOTH, SOCK_STREAM, BTPROTO_RFCOMM);
	perror("STATUS reallocate socket ");

	// bind socket to port 1 of the first available
	// local bluetooth adapter
	loc_addr.rc_family = AF_BLUETOOTH;

	struct hci_dev_info device_info;
	hci_devinfo(0, &device_info);

//  exit(1);

	loc_addr.rc_bdaddr = device_info.bdaddr; //   {"00:15:83:15:A2:CB"}; // "*BDADDR_ANY;
	loc_addr.rc_channel = (uint8_t) 1;
	bind(socket_fd, (struct sockaddr*) &loc_addr, sizeof(loc_addr));
	perror("STATUS bind ");
	// put socket into listening mode
	listen(socket_fd, 1);
	perror("STATUS listen ");
	// accept one connection
	client_fd = accept(socket_fd, (struct sockaddr*) &rem_addr, &opt);
	perror("STATUS accept ");
	ba2str(&rem_addr.rc_bdaddr, buf);
	fprintf(stderr, "accepted connection from %s\n", buf);
	memset(buf, 0, sizeof(buf));

	// read data from the client
	bytes_read = read(client_fd, buf, sizeof(buf));
	if (bytes_read > 0) {
		printf("received [%s]\n", buf);
	}

	// close connection
	close(client_fd);
	close(socket_fd);