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Re: [avr-gcc-list] How to initialize an array of struct?


From: Russell Shaw
Subject: Re: [avr-gcc-list] How to initialize an array of struct?
Date: Sun, 15 Dec 2013 17:59:39 +1100
User-agent: Mozilla/5.0 (X11; Linux i686; rv:17.0) Gecko/20131005 Icedove/17.0.9

On 15/12/13 17:20, dfx wrote:

Hi,

After spending more than one day to create an array of struct I have
come to this code:

struct Lamp  {
    uint8_t highAddress [9] ;
    uint8_t lowAddress [9] ;
    uint8_t onoff ;
    uint8_t active ;
    uint8_t power;
    uint8_t brightness ;
    uint8_t temperatures ;
    uint8_t faultCount ;
} ;

struct Lamp lamps [10];


void init () {

    struct Lamp lamp0 = {" 0013A200 ", " 4094500D " , 0 , 1 , 0 , 0, 0 , 0} ;
    struct Lamp lamp1 = {" 0013A200 ", " 40B12530 " , 0 , 1 , 0 , 0, 0 , 0} ;
    struct Lamp lamp2 = {" 11111111 ", " 22222222 ", 0 , 0, 0 , 0, 0, 0 };
    struct Lamp lamp3 = {" 33333333 ", " 44444444 ", 0 , 0, 0 , 0, 0, 0 };
    struct Lamp lamp4 = {" 55555555 ", " 66666666 ", 0 , 0, 0 , 0, 0, 0 };
    struct Lamp lamp5 = {" 77777777 ", " 88888888 ", 0 , 0, 0, 0 , 0, 0 };
    struct Lamp lamp6 = {" 99999999 ", " 00000000 ", 0 , 0, 0, 0 , 0, 0 };
    struct Lamp lamp7 = {" AAAAAAAA ", " BBBBBBBB ", 0 , 0, 0, 0 , 0, 0 };
    struct Lamp lamp8 = {" CCCCCCCC ," " DDDDDDDD ", 0 , 0, 0, 0 , 0, 0 };
    struct Lamp lamp9 = {" EEEEEEEE ", " FFFFFFFF ", 0 , 0, 0, 0 , 0, 0 };

    lamps [0] = lamp0 ;
    lamps [1] = lamp1 ;
    lamps [2] = lamp2;
    lamps [3] = lamp3 ;
    lamps [4] = lamp4 ;
    lamps [5] = lamp5 ;
    lamps [6] = lamp6 ;
    lamps [7] = lamp7 ;
    lamps [8] = lamp8 ;
    lamps [9] = lamp9 ;
}

it compiles without errors ( and it may be that it works!) but it is
certainly wrong because it consumes twice the memory required (once for
the array [ 10] and another for 10 lamps).

The question is: how can I initialize the array without defining first
ten lamps individually ?

Thank you very much .

struct Lamp {
   uint8_t highAddress[11];
   uint8_t lowAddress[11];
   uint8_t onoff;
   uint8_t active;
   uint8_t power;
   uint8_t brightness;
   uint8_t temperatures;
   uint8_t faultCount;
} ;

struct Lamp lamps [10] = {
   {" 0013A200 ", " 4094500D ", 0, 1, 0, 0, 0, 0},
   {" 0013A200 ", " 40B12530 ", 0, 1, 0, 0, 0, 0},
   {" 11111111 ", " 22222222 ", 0, 0, 0, 0, 0, 0},
   {" 33333333 ", " 44444444 ", 0, 0, 0, 0, 0, 0},
   {" 55555555 ", " 66666666 ", 0, 0, 0, 0, 0, 0},
   {" 77777777 ", " 88888888 ", 0, 0, 0, 0, 0, 0},
   {" 99999999 ", " 00000000 ", 0, 0, 0, 0, 0, 0},
   {" AAAAAAAA ", " BBBBBBBB ", 0, 0, 0, 0, 0, 0},
   {" CCCCCCCC ", " DDDDDDDD ", 0, 0, 0, 0, 0, 0},
   {" EEEEEEEE ", " FFFFFFFF ", 0, 0, 0, 0, 0, 0},
};




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