Pairing Failed with the device which sets LinkKey bit at LE Key Distribution on Pairing Request.

You should use SDK 5.0.3 which fixes exactly this.

如果你用的是sdk5.0.3的话should work directly without modifications or settings. The important files are arch_patch.c and the .obj files. You can check how the patch looks like for 3.0.10.1 here:http://support.dialog-semiconductor.com/resource/patch-release-sdk30101. I guess the diff between SDK 5.0.2 and 5.0.3 looks similar.

If you wonder how the ROM patching works in detail you should take a look at section 2.2 inhttp://support.dialog-semiconductor.com/resource/b-002-da14580-applicati.... Basically you can replace 8 32-bit words in ROM. However there should normally be no reasons for customers manipulating the patches, as those are normally handled by Dialog.

Have you tried to run some SDK 5.0.3 example directly, such as the proximity application?

嗨，CD，

Joacimwe is correct, its was a known issue and should be fixed in the SDK5.0.3. The fix is patch in the ROM code and not a source code. There aren't any settings that you should apply, if you are using the 5.0.3 not the 5.0.2 this should work. You can also find the patch where is indicated and have a look (this is included in SDK5).

Thanks MT_dialog

越来越多的补丁当然占据了更多的空间。只有8个单词可以直接修补，这也意味着如果需要更多修补程序，则需要一种占用更多空间的不同修补方法。然而，通常有改进的余地；补丁并没有真正优化。

If you look in arch_patch.c, you will find the following which is the patch that fixes the LinkKey bit:
//0x00031b95 smpc检查参数
SetWord32(PATCH_ADDR5_REG, 0x00031b94);
SetWord32（补丁数据5寄存器，0xb500df05）//smpc检查参数svc 5

and with the corresponding entry in the patch_table array:
(const uint32_t *) my_smpc_check_param,

这基本上意味着ROM smpc_check_param函数的修补副本被放在项目中链接的某个.obj文件中。

你可以解决这个问题在一个更大的问题t way. Take back the patch files used by SDK 5.0.2.1.

Then you replace this code:
//0x0002cb43 smpc_check_pairing_feat
SetWord32（PATCH\u ADDR3\u REG，0x0002cb40）；
SetWord32（补丁数据3寄存器，0xdf03e7f5）//smpc检查配对功能svc 3

with this code:

SetWord32（PATCH\u ADDR3\u REG，0x00031be8）；
SetWord32（PATCH_DATA3_REG，0xbd00）；//流行音乐{pc}

That's all that's needed and you should see that this solution takes less space than how it's done in SDK 5.0.3.
Note that the smpc_check_pairing_feat patch is only important if you use the central mode on the DA14580, which I guess you're not.

嗨，CD，

I cant see the connection between the memory usage and the Link key bit, yes the patches are making the file footprint larger but i cannot see the relation between this and the behaviour of your device.

Thanks MT_dialog