重构bsp层，bsp层将和HAL的配置一致，修改CubeMX之后不需要修改bsp。重构bmi088。

bsp/log/bsp_log.c

@@ -0,0 +1,34 @@
+#include "bsp_log.h"
+
+#include "SEGGER_RTT.h"
+#include "SEGGER_RTT_Conf.h"
+#include <stdio.h>
+
+#define BUFFER_INDEX 0
+
+void BSPLogInit()
+{
+    SEGGER_RTT_Init();
+}
+
+int PrintLog(const char *fmt, ...)
+{
+    va_list args;
+    va_start(args, fmt);
+    int n = SEGGER_RTT_vprintf(BUFFER_INDEX, fmt, &args);
+    va_end(args);
+    return n;
+}
+
+void Float2Str(char *str, float va)
+{
+    int flag = va < 0;
+    int head = (int)va;
+    int point = (int)((va - head) * 1000);
+    head = abs(head);
+    point = abs(point);
+    if (flag)
+        sprintf(str, "-%d.%d", head, point);
+    else
+        sprintf(str, "%d.%d", head, point);
+}