File content as of revision 0:6a891da014a3:

// Light resource implementation

#include "mbed.h"
#include "nsdl_support.h"
#include "light.h"

#include "PololuLedStrip.h"
PololuLedStrip ledStrip(D2);
//#define LED_COUNT 60
#define LED_COUNT 120
rgb_color colors[LED_COUNT];

#define LIGHT_RES_ID    "11100/0/5900"

extern Serial pc;
char led_color[] = {"00000000"};

void set_led_color(char *color_string)
{
static uint8_t red, green, blue, index ;
int color_int ;

    sscanf(color_string, "%X", &color_int);
    
    index = color_int & 255;
    blue = color_int >> 8 & 255;
    green = color_int >> 16 & 255;
    red = color_int >> 24 & 255;
        
    if(index > 0 and index <= LED_COUNT)
    {
        colors[index-1] = (rgb_color) {red,green,blue} ;
        ledStrip.write(colors, LED_COUNT);
    }
    else if(index == 0)
    {
        for(int i = 0; i < LED_COUNT; i++)
        {
            colors[i] = (rgb_color) {red,green,blue} ;
            ledStrip.write(colors, LED_COUNT);
            wait_ms(10);
        }
    }
    else if(index == 255)
    {    
        for( int i = LED_COUNT-1; i > 0; i-- )
        {
            colors[i] = colors [i-1];
        }
    colors[0] = (rgb_color) {red,green,blue} ;
    ledStrip.write(colors, LED_COUNT);
    }
}

/* Only GET and PUT method allowed */
static uint8_t light_resource_cb(sn_coap_hdr_s *received_coap_ptr, sn_nsdl_addr_s *address, sn_proto_info_s * proto)
{
    sn_coap_hdr_s *coap_res_ptr = 0;

    //pc.printf("LED Strip callback\r\n");

    if(received_coap_ptr->msg_code == COAP_MSG_CODE_REQUEST_GET)
    {
        coap_res_ptr = sn_coap_build_response(received_coap_ptr, COAP_MSG_CODE_RESPONSE_CONTENT);

        coap_res_ptr->payload_len = strlen(led_color);
        coap_res_ptr->payload_ptr = (uint8_t*)led_color;
        sn_nsdl_send_coap_message(address, coap_res_ptr);
    }
    else if(received_coap_ptr->msg_code == COAP_MSG_CODE_REQUEST_PUT)
    {
        //pc.printf("PUT: %d bytes\r\n", received_coap_ptr->payload_len);
        if(received_coap_ptr->payload_len == 8)
        {
            memcpy(led_color, (char *)received_coap_ptr->payload_ptr, received_coap_ptr->payload_len);

            led_color[received_coap_ptr->payload_len] = '\0';
            pc.printf("PUT: %s\r\n",led_color);

            //call LED strup update function here
            set_led_color(led_color);

            coap_res_ptr = sn_coap_build_response(received_coap_ptr, COAP_MSG_CODE_RESPONSE_CHANGED);
            sn_nsdl_send_coap_message(address, coap_res_ptr);
        }
    }

    sn_coap_parser_release_allocated_coap_msg_mem(coap_res_ptr);
    return 0;
}

int create_light_resource(sn_nsdl_resource_info_s *resource_ptr)
{
    nsdl_create_dynamic_resource(resource_ptr, sizeof(LIGHT_RES_ID)-1, (uint8_t*)LIGHT_RES_ID, 0, 0, 0, &light_resource_cb, (SN_GRS_GET_ALLOWED | SN_GRS_PUT_ALLOWED));

    set_led_color("10000000");
    set_led_color("00100000");
    set_led_color("00001000");
    set_led_color("00000000");
    
    return 0;
}