fix: 修正存储卡字段信息

jensen.d.ts

@@ -241,7 +241,7 @@ declare class Jensen {
   
   // 获取内部存储卡信息
   // used：已使用，capacity：总容量（单位为M），status：900表示正常，其它表示异常
-  getCardInfo: (seconds?: number) => Promise<{ used: number; capacity: number; status: string }>;
+  getCardInfo: (seconds?: number) => Promise<{ free: number; used: number; capacity: number; status: string }>;
 
   // 内部存储卡格式化
   formatCard: (seconds?: number) => Promise<ReturnStruct['common']>;

src/utils/jensen.js

@@ -1551,11 +1551,12 @@ Jensen.registerHandler(FIRMWARE_UPLOAD, (msg) => {
 });
 Jensen.registerHandler(READ_CARD_INFO, (msg) => {
   let i = 0;
+  // used实际上是剩余空间
   let used = ((msg.body[i++] & 0xff) << 24) | ((msg.body[i++] & 0xff) << 16) | ((msg.body[i++] & 0xff) << 8) | (msg.body[i++] & 0xff);
   let capacity = ((msg.body[i++] & 0xff) << 24) | ((msg.body[i++] & 0xff) << 16) | ((msg.body[i++] & 0xff) << 8) | (msg.body[i++] & 0xff);
   let status = ((msg.body[i++] & 0xff) << 24) | ((msg.body[i++] & 0xff) << 16) | ((msg.body[i++] & 0xff) << 8) | (msg.body[i++] & 0xff);
 
-  return { used: used, capacity: capacity, status: status.toString(16) };
+  return { free: used, used: capacity - used, capacity: capacity, status: status.toString(16) };
 });
 Jensen.registerHandler(TRANSFER_FILE_PARTIAL, (msg) => {
   let buf = new Uint8Array(msg.body.length);