feat: 添加蓝牙串口模块支持

- 添加 ble_serial_module.c 实现蓝牙串口功能
- 添加 ble_serial_rx_event 和 ble_serial_tx_event 事件定义及实现
- 在 CMakeLists.txt 中注册新的源文件和事件
- 配置蓝牙 L2CAP MTU 和缓冲区大小参数
- 修改 usb_cdc_test_module 支持通过蓝牙发送测试消息
- 实现蓝牙连接状态管理及数据收发功能

src/events/ble_serial_rx_event.c

@@ -0,0 +1,73 @@
+#include <ctype.h>
+#include <stdio.h>
+
+#include "ble_serial_rx_event.h"
+
+#define BLE_SERIAL_RX_EVENT_LOG_BUF_LEN 384
+
+static void log_ble_serial_rx_event(const struct app_event_header *aeh)
+{
+	const struct ble_serial_rx_event *event = cast_ble_serial_rx_event(aeh);
+	char log_buf[BLE_SERIAL_RX_EVENT_LOG_BUF_LEN];
+	int pos;
+
+	pos = snprintf(log_buf, sizeof(log_buf), "len:%zu ascii:\"",
+		       event->dyndata.size);
+	if ((pos < 0) || (pos >= sizeof(log_buf))) {
+		APP_EVENT_MANAGER_LOG(aeh, "log message preparation failure");
+		return;
+	}
+
+	for (size_t i = 0; i < event->dyndata.size; i++) {
+		int tmp = snprintf(&log_buf[pos], sizeof(log_buf) - pos, "%c",
+				   isprint(event->dyndata.data[i]) ?
+					   event->dyndata.data[i] : '.');
+
+		if ((tmp < 0) || ((pos + tmp) >= sizeof(log_buf))) {
+			APP_EVENT_MANAGER_LOG(aeh, "len:%zu ascii:\"...\"",
+					      event->dyndata.size);
+			return;
+		}
+
+		pos += tmp;
+	}
+
+	pos += snprintf(&log_buf[pos], sizeof(log_buf) - pos, "\" hex:");
+	if ((pos < 0) || (pos >= sizeof(log_buf))) {
+		APP_EVENT_MANAGER_LOG(aeh, "len:%zu ascii:\"...\"",
+				      event->dyndata.size);
+		return;
+	}
+
+	for (size_t i = 0; i < event->dyndata.size; i++) {
+		int tmp = snprintf(&log_buf[pos], sizeof(log_buf) - pos, " %02x",
+				   event->dyndata.data[i]);
+
+		if ((tmp < 0) || ((pos + tmp) >= sizeof(log_buf))) {
+			break;
+		}
+
+		pos += tmp;
+	}
+
+	APP_EVENT_MANAGER_LOG(aeh, "%s", log_buf);
+}
+
+static void profile_ble_serial_rx_event(struct log_event_buf *buf,
+					const struct app_event_header *aeh)
+{
+	const struct ble_serial_rx_event *event = cast_ble_serial_rx_event(aeh);
+
+	nrf_profiler_log_encode_uint8(buf, (uint8_t)event->dyndata.size);
+}
+
+APP_EVENT_INFO_DEFINE(ble_serial_rx_event,
+		      ENCODE(NRF_PROFILER_ARG_U8),
+		      ENCODE("len"),
+		      profile_ble_serial_rx_event);
+
+APP_EVENT_TYPE_DEFINE(ble_serial_rx_event,
+		      log_ble_serial_rx_event,
+		      &ble_serial_rx_event_info,
+		      APP_EVENT_FLAGS_CREATE(
+			      APP_EVENT_TYPE_FLAGS_INIT_LOG_ENABLE));

src/events/ble_serial_tx_event.c

@@ -0,0 +1,62 @@
+#include <ctype.h>
+#include <stdio.h>
+
+#include "ble_serial_tx_event.h"
+
+#define BLE_SERIAL_TX_EVENT_LOG_BUF_LEN 256
+
+static void log_ble_serial_tx_event(const struct app_event_header *aeh)
+{
+	const struct ble_serial_tx_event *event = cast_ble_serial_tx_event(aeh);
+	char log_buf[BLE_SERIAL_TX_EVENT_LOG_BUF_LEN];
+	int pos;
+
+	pos = snprintf(log_buf, sizeof(log_buf), "len:%zu ascii:\"",
+		       event->dyndata.size);
+	if ((pos < 0) || (pos >= sizeof(log_buf))) {
+		APP_EVENT_MANAGER_LOG(aeh, "log message preparation failure");
+		return;
+	}
+
+	for (size_t i = 0; i < event->dyndata.size; i++) {
+		int tmp = snprintf(&log_buf[pos], sizeof(log_buf) - pos, "%c",
+				   isprint(event->dyndata.data[i]) ?
+					   event->dyndata.data[i] : '.');
+
+		if ((tmp < 0) || ((pos + tmp) >= sizeof(log_buf))) {
+			APP_EVENT_MANAGER_LOG(aeh, "len:%zu ascii:\"...\"",
+					      event->dyndata.size);
+			return;
+		}
+
+		pos += tmp;
+	}
+
+	pos += snprintf(&log_buf[pos], sizeof(log_buf) - pos, "\"");
+	if ((pos < 0) || (pos >= sizeof(log_buf))) {
+		APP_EVENT_MANAGER_LOG(aeh, "len:%zu ascii:\"...\"",
+				      event->dyndata.size);
+		return;
+	}
+
+	APP_EVENT_MANAGER_LOG(aeh, "%s", log_buf);
+}
+
+static void profile_ble_serial_tx_event(struct log_event_buf *buf,
+					const struct app_event_header *aeh)
+{
+	const struct ble_serial_tx_event *event = cast_ble_serial_tx_event(aeh);
+
+	nrf_profiler_log_encode_uint8(buf, (uint8_t)event->dyndata.size);
+}
+
+APP_EVENT_INFO_DEFINE(ble_serial_tx_event,
+		      ENCODE(NRF_PROFILER_ARG_U8),
+		      ENCODE("len"),
+		      profile_ble_serial_tx_event);
+
+APP_EVENT_TYPE_DEFINE(ble_serial_tx_event,
+		      log_ble_serial_tx_event,
+		      &ble_serial_tx_event_info,
+		      APP_EVENT_FLAGS_CREATE(
+			      APP_EVENT_TYPE_FLAGS_INIT_LOG_ENABLE));