R128蓝牙占用内存资源较大，尝试修改过以下两处的蓝牙配置，修改后再重新编译就会失败
1、使用menuconfig修改配置CONFIG_BT_VAR_MEM_DYNC_ALLOC=y，后初始化蓝牙失败
代码语言：javascript复制[cmd ERR] bt_ready():556, Bluetooth init failed (err -105)添加打印定位到是内存分配失败
2、使用menuconfig修改配置CONFIG_BT_SMP关闭可以减少很多内存，但是编译出错，提示缺少smp_null.c。
CONFIG_BT_VAR_MEM_DYNC_ALLOC配置问题，修改方法如下。，即交换
代码语言：javascript复制_net_buf_pool_list_end = .;和
代码语言：javascript复制KEEP(*(SORT_BY_NAME("._net_buf_pool.static.*")))这两行
代码语言：javascript复制diff --git a/include/ble/linker/common-ram.ld b/include/ble/linker/common-ram.ld
index e97433c91..40744e392 100755
--- a/include/ble/linker/common-ram.ld
b/include/ble/linker/common-ram.ld
@@ -84,8 84,8 @@
{
_net_buf_pool_list_start = .;
_net_buf_pool_list = .;
KEEP(*(SORT_BY_NAME("._net_buf_pool.static.*")))
_net_buf_pool_list_end = .;
} GROUP_DATA_LINK_IN(RAMABLE_REGION, ROMABLE_REGION)CONFIG_BT_SMP 配置问题，下面内容保存为smp_null.c 放到
代码语言：javascript复制./src/ble/host/smp_null.c/**
* @file smp_null.c
* Security Manager Protocol stub
*/
/*
* Copyright (c) 2015-2016 Intel Corporation
*
* SPDX-License-Identifier: Apache-2.0
*/
#include <zephyr.h>
#include <errno.h>
#include <ble/sys/atomic.h>
#include <ble/sys/util.h>
#include <bluetooth/bluetooth.h>
#include <bluetooth/conn.h>
#include <bluetooth/buf.h>
#define BT_DBG_ENABLED IS_ENABLED(CONFIG_BT_DEBUG_HCI_CORE)
#define LOG_MODULE_NAME bt_smp
#include "common/log.h"
#include "hci_core.h"
#include "conn_internal.h"
#include "l2cap_internal.h"
#include "smp.h"
static struct bt_l2cap_le_chan bt_smp_pool[CONFIG_BT_MAX_CONN];
int bt_smp_sign_verify(struct bt_conn *conn, struct net_buf *buf)
{
return -ENOTSUP;
}
int bt_smp_sign(struct bt_conn *conn, struct net_buf *buf)
{
return -ENOTSUP;
}
static int bt_smp_recv(struct bt_l2cap_chan *chan, struct net_buf *req_buf)
{
struct bt_conn *conn = chan->conn;
struct bt_smp_pairing_fail *rsp;
struct bt_smp_hdr *hdr;
struct net_buf *buf;
ARG_UNUSED(req_buf);
/* If a device does not support pairing then it shall respond with
* a Pairing Failed command with the reason set to "Pairing Not
* Supported" when any command is received.
* Core Specification Vol. 3, Part H, 3.3
*/
buf = bt_l2cap_create_pdu(NULL, 0);
/* NULL is not a possible return due to K_FOREVER */
hdr = net_buf_add(buf, sizeof(*hdr));
hdr->code = BT_SMP_CMD_PAIRING_FAIL;
rsp = net_buf_add(buf, sizeof(*rsp));
rsp->reason = BT_SMP_ERR_PAIRING_NOTSUPP;
if (bt_l2cap_send_cb(conn, BT_L2CAP_CID_SMP, buf, NULL, NULL)) {
net_buf_unref(buf);
}
return 0;
}
static int bt_smp_accept(struct bt_conn *conn, struct bt_l2cap_chan **chan)
{
int i;
static const struct bt_l2cap_chan_ops ops = {
.recv = bt_smp_recv,
};
BT_DBG("conn %p handle %u", conn, conn->handle);
for (i = 0; i < ARRAY_SIZE(bt_smp_pool); i ) {
struct bt_l2cap_le_chan *smp = &bt_smp_pool[i];
if (smp->chan.conn) {
continue;
}
smp->chan.ops = &ops;
*chan = &smp->chan;
return 0;
}
BT_ERR("No available SMP context for conn %p", conn);
return -ENOMEM;
}
BT_L2CAP_CHANNEL_DEFINE(smp_fixed_chan, BT_L2CAP_CID_SMP, bt_smp_accept, NULL);
int bt_smp_init(void)
{
return 0;
}
#if defined(CONFIG_BT_DEINIT)
int bt_smp_deinit(void)
{
return 0;
}
void bt_smp_mem_deinit(void)
{
return;
}
void bt_keys_mem_deinit(void)
{
return;
}
#endif
#if defined(CONFIG_BT_VAR_MEM_DYNC_ALLOC)
void keys_dynamic_mem_alloc(void)
{
}
void keys_dynamic_mem_free(void)
{
}
#endif
