Revision 1085
Added code for communication between a computer and the USB hub.
| branches/diagnostics/computer-hub/comp-hub.h | ||
|---|---|---|
| 1 |
#include <termios.h> |
|
| 2 |
#include <fcntl.h> |
|
| 3 |
#include <stdio.h> |
|
| 4 |
#include <stdlib.h> |
|
| 5 |
#include <string.h> |
|
| 6 |
#include <unistd.h> |
|
| 7 |
|
|
| 8 |
int main(void); |
|
| 9 |
int lib_init(); |
|
| 10 |
static void* listen(); |
|
| 11 |
static int read_char(char* buf); |
|
| 12 |
static int put_string(char *str); |
|
| 13 |
static int put_char(char* c); |
|
| branches/diagnostics/computer-hub/comp-hub.c | ||
|---|---|---|
| 1 |
#include "comp-hub.h" |
|
| 2 |
|
|
| 3 |
// THESE ARE NOT SET CORRECTLY! |
|
| 4 |
// ALSO DON'T FORGET TO CHECK OUT |
|
| 5 |
// ATTRIBUTES ON LINES 39 ish TO 50 ish |
|
| 6 |
#define PORT_DEFAULT "/dev/ttyUSB0" |
|
| 7 |
#define INPUT_BAUD_RATE B9600 |
|
| 8 |
#define OUTPUT_BAUD_RATE B9600 |
|
| 9 |
|
|
| 10 |
static char* com_port = PORT_DEFAULT; |
|
| 11 |
static int stream; |
|
| 12 |
|
|
| 13 |
int main(void) |
|
| 14 |
{
|
|
| 15 |
if(lib_init() < 0) |
|
| 16 |
printf("Exiting...\n");
|
|
| 17 |
|
|
| 18 |
//your code here |
|
| 19 |
|
|
| 20 |
return 0; |
|
| 21 |
} |
|
| 22 |
|
|
| 23 |
int lib_init() |
|
| 24 |
{
|
|
| 25 |
stream = open(com_port, O_RDWR); |
|
| 26 |
if (stream == -1) |
|
| 27 |
{
|
|
| 28 |
printf("Failed to open connection on port ");
|
|
| 29 |
printf("%i\n", *com_port);
|
|
| 30 |
return -1; |
|
| 31 |
} else {
|
|
| 32 |
printf("Successfully opened connection on port ");
|
|
| 33 |
printf("%i\n", (int)(*com_port));
|
|
| 34 |
} |
|
| 35 |
// set baud rate, etc. correctly |
|
| 36 |
struct termios options; |
|
| 37 |
if(tcgetattr(stream, &options)) |
|
| 38 |
printf("Error getting attributes");
|
|
| 39 |
cfsetispeed(&options, INPUT_BAUD_RATE); |
|
| 40 |
cfsetospeed(&options, OUTPUT_BAUD_RATE); |
|
| 41 |
options.c_iflag &= ~ICRNL; |
|
| 42 |
options.c_oflag &= ~OCRNL; |
|
| 43 |
options.c_cflag |= (CLOCAL | CREAD); |
|
| 44 |
options.c_cflag &= ~PARENB; |
|
| 45 |
options.c_cflag &= ~CSTOPB; |
|
| 46 |
options.c_cflag &= ~CSIZE; |
|
| 47 |
options.c_cflag |= CS8; |
|
| 48 |
options.c_lflag &= ~ICANON; |
|
| 49 |
options.c_cc[VMIN] = 1; |
|
| 50 |
options.c_cc[VTIME] = 50; |
|
| 51 |
|
|
| 52 |
if (tcsetattr(stream, TCSANOW, &options)) |
|
| 53 |
{
|
|
| 54 |
printf("Error setting attributes.\n");
|
|
| 55 |
return -1; |
|
| 56 |
} |
|
| 57 |
return 0; |
|
| 58 |
} |
|
| 59 |
|
|
| 60 |
/** |
|
| 61 |
* Listener function |
|
| 62 |
* At the moment, just prints out what it receives |
|
| 63 |
**/ |
|
| 64 |
static void* listen() |
|
| 65 |
{
|
|
| 66 |
char c; |
|
| 67 |
while (1) |
|
| 68 |
{
|
|
| 69 |
if (read_char(&c) != 0) {
|
|
| 70 |
printf("Listen failed.\n");
|
|
| 71 |
return NULL; |
|
| 72 |
} |
|
| 73 |
|
|
| 74 |
printf("%c\n", c);
|
|
| 75 |
usleep(1000); |
|
| 76 |
} |
|
| 77 |
|
|
| 78 |
return NULL; |
|
| 79 |
} |
|
| 80 |
|
|
| 81 |
static int read_char(char* buf) |
|
| 82 |
{
|
|
| 83 |
if (read(stream, buf, 1) == -1) {
|
|
| 84 |
printf("Failed to read.\r\n");
|
|
| 85 |
return -1; |
|
| 86 |
} |
|
| 87 |
return 0; |
|
| 88 |
} |
|
| 89 |
|
|
| 90 |
/** |
|
| 91 |
* Put functions |
|
| 92 |
**/ |
|
| 93 |
static int put_string(char *str) |
|
| 94 |
{
|
|
| 95 |
if (write(stream, str, strlen(str)) == -1) {
|
|
| 96 |
printf("Failed to write.\r\n");
|
|
| 97 |
return -1; |
|
| 98 |
} |
|
| 99 |
return 0; |
|
| 100 |
} |
|
| 101 |
|
|
| 102 |
static int put_char(char* c) |
|
| 103 |
{
|
|
| 104 |
if (write(stream, c, 1) == -1) {
|
|
| 105 |
printf("Failed to write.\r\n");
|
|
| 106 |
return -1; |
|
| 107 |
} |
|
| 108 |
return 0; |
|
| 109 |
} |
|
| branches/diagnostics/computer-hub/Makefile | ||
|---|---|---|
| 1 |
all: |
|
| 2 |
gcc comp-hub.c -o comp-hub |
|
| 3 |
|
|
| 4 |
clean: |
|
| 5 |
rm comp-hub |
|
Also available in: Unified diff