File content as of revision 9:8839ecc02e0e:

#include "wifi.h"
#include "utils.h"

#define BAUDR 921600

Wifi::Wifi (PinName tx, PinName rx, PinName reset, PinName status,
        const char * ssid, const char * phrase) : 
        wifi_(tx, rx, reset, status, ssid, phrase, WPA) {    
    wifi_.init(); // use DHCP
    while (!wifi_.connect())
        ;
    printf("IP Address is %s\n\r", wifi_.getIPAddress());
    wifi_.setProtocol(TCP);
    /* set different baudrate, higher values tends to be unstable */
    wifi_.baudr(BAUDR);
}

/*
* Format: (int) -1 (int) -1 (int) swimmer_id
*   many times (char) 0xAA (int) count 3*(short) acc 3*(float)gyro
*         (int) -1 (int) -1        
*/
int Wifi::sendFile(const char *fname, int swimmer_id)
{
    char buffer[BUFFER_SIZE+1];
    int temp;
    int bytes;

    FILE *f = fopen(fname, "rb");
    if (f == NULL)
        return -1;  
    
    //send swimmer id
    temp = -1;
    toBytes(buffer, &temp, sizeof(int));
    toBytes(buffer+sizeof(int), &temp, sizeof(int));
    temp = swimmer_id;
    toBytes(buffer+sizeof(int)*2, &temp, sizeof(int));
    bufferSend(buffer, 3*sizeof(int));
    
    while ((bytes = fread(buffer+1, 1, BUFFER_SIZE, f)) != 0)
        buffer[0] = 0xAA; //sync packet
        bufferSend(buffer, bytes+1);

    //end of transmission
    temp = -1;
    toBytes(buffer, &temp, sizeof(int));
    toBytes(buffer+sizeof(int), &temp, sizeof(int));
    bufferSend(buffer, 2*sizeof(int));

    fclose(f); 
    return 0;
}

/*
 * Returns 0 if no command was recieved
 * or the command
 */
char Wifi::getCmd(void)
{
    while (!wifi_.readable() || wifi_.getc() != '#')    
        ;
    
    wifi_.putc('#');
    wifi_.putc('A');
        
    return wifi_.getc();
}

/* ********************************
 * private
 * *******************************/
void Wifi::bufferSend(char *buffer, size_t size)
{
    int i;
    for (i = 0; i < size; i++)
        wifi_.putc(buffer[i]);
}