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.

如果您使用SDK 5.0.3它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用了更多空间。只有8个单词可以直接修补8个单词也意味着如果有更多的补丁需要不同的补丁方法，则占用更多空间。然而，通常有改善的空间;补丁不是真正优化的。

If you look in arch_patch.c, you will find the following which is the patch that fixes the LinkKey bit:
// 0x00031b95 smpc_check_param.
SetWord32(PATCH_ADDR5_REG, 0x00031b94);
setword32（patch_data5_reg，0xb500df05）;// smpc_check_param svc 5

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

基本上意味着ROM SMPC_CHECK_PARAM函数的修补副本被放入了您在项目中链接的一些.obj文件。

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_addr3_reg，0x0002cb40）;
setword32（patch_data3_reg，0xdf03e7f5）;// smpc_check_pairing_feat svc 3

with this code:

setword32（patch_addr3_reg，0x00031be8）;
setword32（patch_data3_reg，0xbd00）;// pop {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