STM32串口DMA发送的数据不连续，已经试了一些办法，仍未解决，不知是什么原因？
用串口监控得到的数据是：
10,9:07:54,io.exe(5532),IRP_MJ_WRITE,COM8,7, 4D 00 01 01 06 00 08 | M#0#1#1#6#0#8,
12,9:07:54,io.exe(5532),IRP_MJ_READ,COM8,1, 4D | M,
13,9:07:56,io.exe(5532),IRP_MJ_READ,COM8,1, 00 | #0,
14,9:07:56,io.exe(5532),IRP_MJ_READ,COM8,1, 01 | #1,
15,9:07:56,io.exe(5532),IRP_MJ_READ,COM8,1, 23 | #,
16,9:07:56,io.exe(5532),IRP_MJ_READ,COM8,1, 00 | #0,
17,9:07:56,io.exe(5532),IRP_MJ_READ,COM8,1, 03 | #3,
18,9:07:56,io.exe(5532),IRP_MJ_READ,COM8,1, 5C | ,
19,9:07:56,io.exe(5532),IRP_MJ_READ,COM8,1, 88 | ?,
20,9:07:56,io.exe(5532),IRP_MJ_READ,COM8,1, 00 | #0,
21,9:07:56,io.exe(5532),IRP_MJ_READ,COM8,1, 13 | #19,
22,9:07:56,io.exe(5532),IRP_MJ_READ,COM8,1, CB | ?,
23,9:07:56,io.exe(5532),IRP_MJ_READ,COM8,1, 12 | #18,
24,9:07:56,io.exe(5532),IRP_MJ_READ,COM8,1, 00 | #0,
25,9:07:56,io.exe(5532),IRP_MJ_READ,COM8,1, 00 | #0,
26,9:07:56,io.exe(5532),IRP_MJ_READ,COM8,1, 90 | ?,
27,9:07:56,io.exe(5532),IRP_MJ_READ,COM8,1, D2 | ò,
28,9:07:56,io.exe(5532),IRP_MJ_READ,COM8,1, 07 | #7,
29,9:07:56,io.exe(5532),IRP_MJ_READ,COM8,1, EE | ?,
30,9:07:56,io.exe(5532),IRP_MJ_READ,COM8,1, 17 | ,
31,9:07:56,io.exe(5532),IRP_MJ_READ,COM8,1, E1 | á,
32,9:07:56,io.exe(5532),IRP_MJ_READ,COM8,1, 00 | #0,
33,9:07:56,io.exe(5532),IRP_MJ_READ,COM8,1, 0D | #13,
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序号,时间,进程(PID),IO类型,COM口,数据长度,数据,
74,10:49:20,KCJC_Set.exe(2228),IRP_MJ_WRITE,COM8,7,
4D 00 02 01 06 00 09 | M#0#2#1#6#0#9,
75,10:49:20,KCJC_Set.exe(2228),IRP_MJ_READ,COM8,41,
4D 00 02 23 00 03 5B CC 00 13 C7 7B 00 00 90 B1 06 AB 17 E0 00 05 06 AB 42 F4 0D 9D 42 03 AB 6F 24 14 75 00 01 00 03 0A 80 | M#0#2##0#3[ì#0#19?{#0#0?±#6?à#0#5#6?B?#13?B#3?o$u#0#1#0#3#10?,
76,10:49:22,KCJC_Set.exe(2228),IRP_MJ_WRITE,COM8,7,
4D 00 01 01 06 00 08 | M#0#1#1#6#0#8,
77,10:49:22,KCJC_Set.exe(2228),IRP_MJ_READ,COM8,41,
4D 00 01 23 00 03 5B D4 00 13 C7 CB 00 00 90 AA 0A 27 17 E0 00 18 07 BB 42 F2 C0 81 42 00 7F 15 22 27 72 00 01 00 03 0A 8E | M#0#1##0#3[?#0#19??#0#0?a#10'à#0#7?Bòà?B#0"'r#0#1#0#3#10?,
78,10:49:22,KCJC_Set.exe(2228),IRP_MJ_WRITE,COM8,7,
4D 00 02 01 06 00 09 | M#0#2#1#6#0#9,
79,10:49:22,KCJC_Set.exe(2228),IRP_MJ_READ,COM8,41,
4D 00 02 23 00 03 5B CC 00 13 C7 7D 00 00 90 B1 06 B7 17 E0 00 05 06 B7 42 F4 0F BC 42 03 AD F2 24 14 B0 00 01 00 03 0B 7B | M#0#2##0#3[ì#0#19?}#0#0?±#6·à#0#5#6·B?#15?B#3-ò$°#0#1#0#3#11{,
80,10:49:24,KCJC_Set.exe(2228),IRP_MJ_WRITE,COM8,7,
4D 00 01 01 06 00 08 | M#0#1#1#6#0#8,
81,10:49:24,KCJC_Set.exe(2228),IRP_MJ_READ,COM8,41,
4D 00 01 23 00 03 5B D5 00 13 C7 CE 00 00 90 AB 0A 20 17 E0 00 18 07 BB 42 F2 BF 30 42 00 7D 87 22 27 4E 00 01 00 03 0A 86 | M#0#1##0#3[?#0#19??#0#0??#10 à#0#7?Bò?0B#0}?"'N#0#1#0#3#10?,
82,10:49:26,KCJC_Set.exe(2228),IRP_MJ_WRITE,COM8,7,
4D 00 02 01 06 00 09 | M#0#2#1#6#0#9,
83,10:49:26,KCJC_Set.exe(2228),IRP_MJ_READ,COM8,41,
4D 00 02 23 00 03 5B CD 00 13 C7 80 00 00 90 B1 06 CF 17 E0 00 05 06 CF 42 F4 14 09 42 03 B3 09 24 15 28 00 01 00 03 09 97 | M#0#2##0#3[í#0#19??#0#0?±#6?à#0#5#6?B?#9B#33#9$(#0#1#0#3#9?,
84,10:49:26,KCJC_Set.exe(2228),IRP_MJ_WRITE,COM8,7,
4D 00 01 01 06 00 08 | M#0#1#1#6#0#8,
85,10:49:26,KCJC_Set.exe(2228),IRP_MJ_READ,COM8,41,
4D 00 01 23 00 03 5B D6 00 13 C7 D0 00 00 90 AB 0A 14 17 E0 00 18 07 BB 42 F2 BD 11 42 00 7B 04 22 27 13 00 01 00 03 09 9C | M#0#1##0#3[?#0#19?D#0#0??#10à#0#7?Bò?#17B#0{#4"'#19#0#1#0#3#9?,
86,10:49:28,KCJC_Set.exe(2228),IRP_MJ_WRITE,COM8,7,
4D 00 02 01 06 00 09 | M#0#2#1#6#0#9,
87,10:49:28,KCJC_Set.exe(2228),IRP_MJ_READ,COM8,41,
4D 00 02 23 00 03 5B CD 00 13 C7 82 00 00 90 B1 06 E6 17 E0 00 06 06 E6 42 F4 18 52 42 03 B8 1B 24 15 9E 00 01 00 03 0A A2 | M#0#2##0#3[í#0#19??#0#0?±#6?à#0#6#6?B?RB#3?$?#0#1#0#3#10￠,
88,10:49:30,KCJC_Set.exe(2228),IRP_MJ_WRITE,COM8,7,
4D 00 01 01 06 00 08 | M#0#1#1#6#0#8,
89,10:49:30,KCJC_Set.exe(2228),IRP_MJ_READ,COM8,41,
4D 00 01 23 00 03 5B D7 00 13 C7 D3 00 00 90 AB 09 FC 17 E0 00 18 07 BB 42 F2 B8 C4 42 00 75 ED 22 26 9B 00 01 00 03 0C 9F | M#0#1##0#3[×#0#19?ó#0#0??#9üà#0#7?Bò??B#0uí"&?#0#1#0#3#12?,
90,10:49:30,KCJC_Set.exe(2228),IRP_MJ_WRITE,COM8,7,
4D 00 02 01 06 00 09 | M#0#2#1#6#0#9,
91,10:49:30,KCJC_Set.exe(2228),IRP_MJ_READ,COM8,41,
4D 00 02 23 00 03 5B CE 00 13 C7 85 00 00 90 B1 07 0D 17 E0 00 07 07 0D 42 F4 1F 5B 42 03 C0 6D 24 16 61 00 01 00 03 09 25 | M#0#2##0#3[?#0#19??#0#0?±#7#13à#0#7#7#13B?[B#3àm$a#0#1#0#3#9%,
92,10:49:32,KCJC_Set.exe(2228),IRP_MJ_WRITE,COM8,7,
4D 00 01 01 06 00 08 | M#0#1#1#6#0#8,
93,10:49:32,KCJC_Set.exe(2228),IRP_MJ_READ,COM8,41,
4D 00 01 23 00 03 5B D8 00 13 C7 D5 00 00 90 AB 09 E5 17 E0 00 17 07 BB 42 F2 B4 7B 42 00 70 DB 22 26 25 00 01 00 03 0B B0 | M#0#1##0#3[?#0#19??#0#0??#9?à#0#7?Bò′{B#0p?"&%#0#1#0#3#11°,
94,10:49:34,KCJC_Set.exe(2228),IRP_MJ_WRITE,COM8,7,
4D 00 02 01 06 00 09 | M#0#2#1#6#0#9,
95,10:49:34,KCJC_Set.exe(2228),IRP_MJ_READ,COM8,41,
4D 00 02 23 00 03 5B CF 00 13 C7 88 00 00 90 B2 07 3C 17 E0 00 08 07 3C 42 F4 27 C5 42 03 CA 62 24 17 4B 00 01 00 03 09 E5 | M#0#2##0#3[?#0#19??#0#0?2#7<à#0#8#7<B?'?B#3êb$K#0#1#0#3#9?,
96,10:49:34,KCJC_Set.exe(2228),IRP_MJ_WRITE,COM8,7,
4D 00 01 01 06 00 08 | M#0#1#1#6#0#8,
97,10:49:34,KCJC_Set.exe(2228),IRP_MJ_READ,COM8,41,
4D 00 01 23 00 03 5B D9 00 13 C7 D8 00 00 90 AC 09 BE 17 E0 00 16 07 BB 42 F2 AD 72 42 00 68 89 22 25 62 00 01 00 03 0B 5F | M#0#1##0#3[ù#0#19??#0#0??#9?à#0#7?Bò-rB#0h?"%b#0#1#0#3#11_,
98,10:49:36,KCJC_Set.exe(2228),IRP_MJ_WRITE,COM8,7,
4D 00 02 01 06 00 09 | M#0#2#1#6#0#9,
99,10:49:36,KCJC_Set.exe(2228),IRP_MJ_READ,COM8,41,
4D 00 02 23 00 03 5B CF 00 13 C7 8A 00 00 90 B2 07 64 17 E0 00 08 07 64 42 F4 2E E5 42 03 D2 CF 24 18 10 00 01 00 03 0A 99 | M#0#2##0#3[?#0#19??#0#0?2#7dà#0#8#7dB?.?B#3ò?$#16#0#1#0#3#10?,
100,10:49:38,KCJC_Set.exe(2228),IRP_MJ_WRITE,COM8,7,
4D 00 01 01 06 00 08 | M#0#1#1#6#0#8,
101,10:49:38,KCJC_Set.exe(2228),IRP_MJ_READ,COM8,41,
4D 00 01 23 00 03 5B DA 00 13 C7 DB 00 00 90 AC 09 8F 17 E0 00 15 07 BB 42 F2 A5 07 42 00 5E 94 22 24 78 00 01 00 03 0A D6 | M#0#1##0#3[ú#0#19??#0#0??#9?à#0#7?Bò￥#7B#0^?"$x#0#1#0#3#10?,
102,10:49:38,KCJC_Set.exe(2228),IRP_MJ_WRITE,COM8,7,
4D 00 02 01 06 00 09 | M#0#2#1#6#0#9,
103,10:49:38,KCJC_Set.exe(2228),IRP_MJ_READ,COM8,41,
4D 00 02 23 00 03 5B D0 00 13 C7 8D 00 00 90 B2 07 9E 17 E0 00 0A 07 9E 42 F4 39 52 42 03 DF 26 24 19 32 00 01 00 03 0A 12 | M#0#2##0#3[D#0#19??#0#0?2#7?à#0#10#7?B?9RB#3?&$2#0#1#0#3#10#18,
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