casting pointers

[Stanislav Silnitskiy]

Hello!

I've bumped into the issue with casting...

main.c:
static ble_gap_addr_t addr0;
static uint16_t *p_host0;

int main(void) {
    p_host0 = (void*)&addr0.addr[0];

works fine, but...

beacon.c:
static ble_gap_addr_t addr1;
static uint16_t *p_host1;

void init_beacon(void) {
   p_host1 = (void*)&addr1.addr[0];

hungs in assignment when I call init_beacon() from main()

Where is rake?

[Stanislav Silnitskiy]

It must be memory alignment issue.

[monpetit]

I have tested in another way.

#pragma anon_unions
typedef struct {
    uint8_t addr_type;                    /**< See @ref BLE_GAP_ADDR_TYPES. */
    union {
        uint8_t addr[BLE_GAP_ADDR_LEN];   /**< 48-bit address, LSB format. */
        __packed struct {
            uint16_t host;
            uint32_t net;
        };
    };
} my_gap_addr_t;


static ble_gap_addr_t addr1 = { 0x00, { 0x01, 0x02, 0x03, 0x04, 0x05, 0x06 } };
static ble_gap_addr_t *p_addr;
static my_gap_addr_t  *p_mddr;

#define show(P) \
    printf("(0x%02x, 0x%02x, 0x%02x, 0x%02x, 0x%02x, 0x%02x)\r\n", \
        P->addr[0], P->addr[1], P->addr[2], P->addr[3], P->addr[4], P->addr[5])