Example of C99 Designator Clauses inside a `const struct`

c99_designators_in_const_struct.c

// temp. includes so that the compiler doesn't complain
// (delete these three lines when you import the code)
#include <stdio.h>
#include <stdint.h>
#include <stdbool.h>

struct spi_devices_struct {
    char manu[10]; // ID winbond 0xef.
    char device[10]; // ID string  (ie W25Q16BV)
    uint8_t manId; // manu ID
    uint8_t devId; // device code assigned by Manu
    char size[3]; // mega bits 
    uint8_t tBlocks; // number of blocks in device, 32K block
    uint8_t endBlkA23; // address of last block
    uint8_t endBlkA15; // 
    bool supported;
    char type; // assign char as mappable ID
};

// C99 Designator Clauses
// http://en.cppreference.com/w/c/language/struct_initialization
const struct spi_devices_struct spiDev[] = {
    // Device 0
    { .manId = 0xef,
      .devId = 0x14,
      .size = "16",
      .tBlocks = 64,
      .endBlkA23 = 0x1f,
      .endBlkA15 = 0x80,
      .manu = "Winbond",
      .device = "W25Q16BV",
      .supported = true,
      .type = 0x41 },

    // Device 1
    { .manId = 0x1f,
      .devId = 0x66,
      .size = "1",
      .tBlocks = 8,
      .endBlkA23 = 0x03,
      .endBlkA15 = 0x80,
      .manu = "Atmel",
      .device = "AT25FS010",
      .supported = false,
      .type = 0x42 },

    // Device 2
    { .manId = 0xef,
      .devId = 0x16,
      .size = "64",
      .tBlocks = 128,
      .endBlkA23 = 0x7f,
      .endBlkA15 = 0x80,
      .manu = "Winbond",
      .device = "W25Q64BV",
      .supported = true,
      .type = 0x43 }
};

int main(void) {
    for (int i = 0; i < 3; i++)
        printf("spiDev[%d] : %s %s\n", i, spiDev[i].manu, spiDev[i].device);

    return 0;
}

$ gcc c99_designators_in_const_struct.c -o test

$ ./test 
spiDev[0] : Winbond W25Q16BV
spiDev[1] : Atmel AT25FS010
spiDev[2] : Winbond W25Q64BV