|
項(xiàng)目需要用MSComm控件實(shí)現(xiàn)射頻設(shè)備與PC的串口通信。先說一下設(shè)備發(fā)送命令后會(huì)返回的相應(yīng)的數(shù)據(jù):5 q1 u9 D9 e: L5 Z0 O8 B- u
& ^% g0 N+ l, a7 P. R當(dāng)發(fā)送命令"H!i"時(shí),為尋找芯片。
1 F6 x; u. X0 u3 d當(dāng)設(shè)備連接正確又無芯片在感應(yīng)區(qū)時(shí),設(shè)備循環(huán)返回:0630 和 1537! h- b! I$ j( d- r( R
當(dāng)設(shè)備當(dāng)設(shè)備連接正確而芯片又在感應(yīng)區(qū)時(shí),設(shè)備返回0630,稍有停頓,繼續(xù)返回4831+其他信息7 e) n. g9 g' ]1 T4 \ y1 V' w
5 ~( w% S4 e% U5 ~% \( E0 Y8 L' v' C當(dāng)芯片在感應(yīng)區(qū)時(shí),發(fā)送命令“R00000016U”,讀取芯片前十六字節(jié)數(shù)據(jù)
8 V2 ^" d4 Z6 J5 h7 k& T* ]& Z( [沒有錯(cuò)誤時(shí),設(shè)備返回:0630
* O+ ]7 i' B3 C! w+ W, A$ j J1 [此時(shí),發(fā)送命令“STX”,或十六進(jìn)制命令“02”/ C& a7 @: I5 ~0 l# A2 o- M' F; `
設(shè)備返回前十六字節(jié)數(shù)據(jù)8 R% a( W- J- z. X y" d+ s" j6 V
6 q) n2 x0 i, d5 j# c之后繼續(xù)發(fā)送命令“H!i”,尋找下一個(gè)芯片
5 ^* [% Y" s5 I) R9 U' @; C9 R( j9 t--------------------------------------------------------------------
9 ~4 ~' \+ v% F* v+ j! F1 b項(xiàng)目用MSComm進(jìn)行串口通信6 l1 |( _# X; I- W
需要將上述幾條命令循環(huán)起來。我用的是比較MSComm1.Input是否為爭(zhēng)取的返回值“4831”和“0630”。' P! C z8 C7 c& V G( @2 a; U+ t t" F
用了三個(gè)timer來控制三條命令“H!i”、“R00000016U”和“STX”的發(fā)送。把發(fā)送命令都放在了timer_timer下。% f) h2 w v3 M$ Z1 G( L4 k
但是這樣的話,就用到了三個(gè)Private Sub MSComm1_oncomm()。系統(tǒng)報(bào)錯(cuò),“發(fā)現(xiàn)二義性名稱”。意思應(yīng)該是不能重復(fù)定義Private Sub MSComm1_oncomm()吧?
( b8 R, b( _9 r" V----------------------------------------------------------------------------1 q) \, _8 E: u0 z
其實(shí)程序說簡單些就是:
* i9 z% X+ U8 ?發(fā)送命令—>從數(shù)據(jù)返回區(qū)判定->發(fā)送命令->數(shù)據(jù)返回區(qū)判定->再發(fā)送命令->接收數(shù)據(jù)" T9 r9 W$ E* ^+ M$ r7 w9 q4 t9 C1 C
這個(gè)循環(huán)要怎么實(shí)現(xiàn)呢?& Q" @. i1 \; u$ d! {, F7 y
先謝謝各位!9 n2 ]& U2 G% F' ]1 g" d# x
% A* Q6 a- {3 {0 r--------------------------------------------------------------------
; Y' s4 t' z, J6 P7 r! i, r# r7 W下面是循環(huán)部分的代碼。系統(tǒng)報(bào)錯(cuò)% t. L; X% \. x
Private Sub cmdStart_click()2 n* G, [0 ^! v: m: t7 n+ I2 ^
Timer1.Enabled = True: H3 L/ G# c, o7 q1 b
* P! T* F8 r* K2 B9 R2 x
7 {! @# Z3 u' h+ k
3 J& s5 O. Q3 w* G' g* D3 ~1 aEnd Sub
' t. I7 M* E% fPrivate Sub timer1_timer()( p: ]: ^9 O# [- p4 \
4 [% w# O+ V* D+ Q/ R MSComm1.OutBufferCount = 0 '先清空緩存
9 A2 _( s1 I, X6 X+ L sendbuffer = "H!i"
6 P- r; H' _0 L MSComm1.Output = sendbuffer
3 h+ b8 K0 W8 }2 k" ^( i/ UEnd Sub
. o3 z% w$ @+ O/ @'結(jié)束6 s9 @! u+ w- n
Private Sub cmdStop_click()
3 g6 S5 m5 B8 E" w Timer1.Enabled = False- S0 E" b! ]( |( i6 e
Timer2.Enabled = False
7 H1 ]5 \6 b: F% q2 g; |6 q Timer3.Enabled = False
) ^! C/ V/ W8 A: `; BEnd Sub/ a( c* i% N9 \$ @0 C
* n1 f' q E& S# v
'接收數(shù)據(jù)1 i8 Y6 |# ]% ]7 u/ X& M) B5 R% u5 h
Private Sub MSComm1_oncomm()
7 {) R) N o+ R/ n3 e0 M, K4 w Dim inbyte() As Byte& Z. }6 _: D' A U' u# ]1 \
Dim revbuffer As String
6 U0 F& F& A, T* w1 D Dim a, i, b
' o- o) z: p+ I3 K; P1 U& g3 t. {+ ] Select Case MSComm1.CommEvent
8 S4 _* f7 b$ Y; R% R, ~" O! p '如果有CT在感應(yīng)區(qū)2 O3 o5 v0 h, _+ u/ |
2 a. D1 Q: w4 A F* u
Case comEvReceive
. n& f' J$ W# w1 t inbyte = MSComm1.Input8 H' I2 p$ g. T6 {
For i = LBound(inbyte) To UBound(inbyte) '返回?cái)?shù)據(jù)轉(zhuǎn)換為十六進(jìn)制
; W7 M+ F9 V* O2 S/ s* j# [0 c+ n revbuffer = revbuffer + Hex(inbyte(i))
( T5 [( z$ p. V0 F: o3 C9 G4 N Next i
1 k8 T& W q. O# D4 o* s0 y txtHex.Text = revbuffer; b) E% U9 O/ l2 {& z
If Mid(revbuffer, 1, 6) = "480310" Then
& V" R. _# o4 s, i Timer1.Enabled = False
( M$ y1 d# ^; i Timer1.Enabled = True* {$ A0 ]" ]% n+ r1 |
End If/ U/ H6 n* E2 n. E* J
End Select) X0 k+ R5 i# h S! v6 h. D) E
Case comEvSend1 L5 i- T" N% P: h
End Select+ C+ Z/ q' f! Q5 s
Private Sub timer2_timer()' Q) v3 k; J1 A5 r! Q3 O/ X, `
MSComm1.OutBufferCount = 0 '先清空緩存7 ]% f9 z) X, c% t9 |3 u
sendbuffer = "R00000016U"( Z6 L8 P) q# H( A8 ~1 _ q2 w$ b
MSComm1.Output = sendbuffer% A5 T& [7 H6 Y2 O, @
End Sub( P; d; D( i6 N k
Private Sub MSComm1_oncomm()
0 L" O. Q+ T% D$ W" ~3 I. D Select Case MSComm1.CommEvent
# M- c: J: c1 k8 T9 h8 E Case comEvReceive
4 {: Z% g: ~, ~% @: g9 { inbyte = MSComm1.Input4 V- j3 W; |" |5 n
For i = LBound(inbyte) To UBound(inbyte) '返回?cái)?shù)據(jù)轉(zhuǎn)換為十六進(jìn)制; |' z& y) X; z) O2 a+ V& I
revbuffer = revbuffer + Hex(inbyte(i))
: a# M/ X& j0 `/ K8 E" { Next i- Q- `& ~/ d; s9 `8 o
txtHex.Text = revbuffer* y& { {1 s# n5 G2 V
If Mid(revbuffer, 1, 4) = "6030" Then
- ^8 x8 \% C8 K' T Timer2.Enabled = False. p. [; v- X9 _8 q" g& |6 K
Timer3.Enabled = True
+ X6 L* f& W6 ?. P2 N5 O End If# F/ {) Q& d9 l: p
Case comEvSend) \8 T9 Q1 B/ ], Z
End Select
" m2 q$ s3 {, b, ^! ~End Sub
$ R' J& [0 L1 OPrivate Sub timer3_timer()
8 [ f9 V' J$ W, N% L% E0 ~& M MSComm1.OutBufferCount = 0 '先清空緩存6 ^- V/ k9 [" r( l
sendbuffer = "STX"9 k- X% j+ I/ y7 i3 e0 r6 P9 o
MSComm1.Output = sendbuffer- A" y9 a& v0 A( W- r
Select Case MSComm1.CommEvent
6 S F( j. U5 { w' n& }$ \ Case comEvReceive0 o# x( ]# {" u9 e; p4 U
inbyte = MSComm1.Input1 K4 ~1 h1 d& @4 V
For i = LBound(inbyte) To UBound(inbyte) '返回?cái)?shù)據(jù)轉(zhuǎn)換為十六進(jìn)制- u1 L* ~/ ]6 G/ R- _- P4 Z5 B
revbuffer = revbuffer + Hex(inbyte(i))
8 H& d6 X9 y1 x F( m5 G' }: d Next i, o: g' `' n! l
txtHex.Text = revbuffer& d. `9 ?: V& |) T
Case comEvSend$ g! C( o. L' h1 C; g7 q
End Select3 S9 q! ?( X% ?1 Y9 F- {, c4 l6 S
End Sub
$ a' }5 M7 g; K3 u d/ N$ y& [' \, W! P: t0 D, N3 ?! o: W
7 Z6 A0 P5 K* v2 _% B0 f
" e1 e3 G4 t" j& a) l) g |
|