Add documentation about the checksum

doc/tutorial.md

@@ -539,6 +539,11 @@ want to disassemble the code at 0x20000000, use:\
 (gdb) disassemble 0x20000001
 ```
 
+Checksum of binary file
+-----------------------
+
+When flashing a file, the checksum of which is calculated, both in md5 and the sum algorithm used by ST's official tool. The detail of sum algorithm can be found in [https://www.st.com/resource/en/user_manual/cd00262073-stm32-stlink-utility-software-description-stmicroelectronics.pdf](https://www.st.com/resource/en/user_manual/cd00262073-stm32-stlink-utility-software-description-stmicroelectronics.pdf).
+
 References
 ==========
 

src/common.c

@@ -1470,7 +1470,7 @@ int stlink_fwrite_sram(stlink_t * sl, const char* path, stm32_addr_t addr) {
         fprintf(stderr, "map_file() == -1\n");
         return -1;
     }
-    printf("file %s ");
+    printf("file %s ", path);
     md5_calculate(&mf, path);
     stlink_checksum(&mf, path);
 
@@ -2698,7 +2698,7 @@ int stlink_fwrite_flash(stlink_t *sl, const char* path, stm32_addr_t addr) {
         return -1;
     }
 
-    printf("file %s ");
+    printf("file %s ", path);
     md5_calculate(&mf, path);
     stlink_checksum(&mf, path);
 
@@ -3266,7 +3266,7 @@ int stlink_fwrite_option_bytes(stlink_t *sl, const char* path, stm32_addr_t addr
         return -1;
     }
 
-    printf("file %s ");
+    printf("file %s ", path);
     md5_calculate(&mf, path);
     stlink_checksum(&mf, path);