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本帖最后由 Heaven_1 于 2022-3-10 13:54 编辑
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& i6 E8 l0 c7 q. w. I$ I//该模拟串口为半双工模式， 2400/8/N/1
5 u1 j' G( q1 P3 `% e//如需不同波特率改变T2定时器的时间便可4 x7 j/ j- I( B7 N2 P" m; e! D5 R1 g/ {, n
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#pragma vector = TIMER2_OVF_vect2 [+ O* v0 ^# J) e% x
__interrupt
6 Y4 N+ q/ z2 s# Wvoid T2time139us(void)
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static unsigned char bit;. L& d) O* D8 y0 O( s g/ ]4 j/ D& |! b
static unsigned char count;
$ K4 @, B# y) ?5 U" e static unsigned char stat_flag;" D) U4 C3 I7 S* M# J
static unsigned char tmp;/ S$ w& k8 ~# s% t. y* e5 Y3 y
static unsigned char recv_byte;$ n% _, Q( ?6 v# a
TCNT2 = 152;
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if((Uart1_RX_overtimer != 0) && (Uart1_RX_overtimer != 0xff)){
, S5 S8 A4 Q$ j3 S Uart1_RX_overtimer--;6 g4 r8 j3 q: O! E
}
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/ Q/ w7 ^9 O) |- }# z/ [2 n, g if( Uart1_RX_overtimer == 0 ){
' ~# k+ `1 x- W asm("sei");
; N" @4 q4 c5 q9 ]" f return;2 P9 E1 k4 _/ G. l
}
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if(Uart1_send_haveframe == NONE)5 G3 h# v5 I( a6 A" d% Q" y
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if(Uart1_recv_haveframe != NONE) {- V7 k: S3 {4 U: |) Q4 N5 q9 n
asm("sei");+ s b8 }. \$ F; `) i
return;) N$ l% y* ^8 N3 Q! }2 d
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) F6 r2 F3 r, C- u4 j- v if(stat_flag == 0xa5){' U3 D3 `/ c b' s8 }
stat_flag = 0;
% \. T2 g& q" ? bit = 1;
0 ?6 d( ~- k9 M. r% T/ p2 |* Q! _# j: N, } count = 0;
# P2 A6 e6 s9 a3 ?1 w tmp = 0;
; p! x- e% _1 | recv_byte = 0;5 H& _& |9 L: E i
asm("sei");5 u- ~" y, s) S3 ] Z4 r. }+ A% H
return;
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1 q5 `- \- e2 M: W if(bit == 0)2 O- g8 P" ]1 A1 c& z
{
" H! c) ~: X- z8 C/ ^0 B if(!(IORxd_PIN & (1<<IORxd_BIT))){
$ H* L9 M4 y! k# i0 P, J6 C$ ] count ++;( R& w# W, X- p X+ i! _+ k
if(count >= 2) stat_flag = 0xa5;, ^; j; i; _% ?7 v
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else{; O) E$ R- n5 b7 A+ }% ]% z" ^
count = 0;/ C* Y. I6 Z, G- c6 K4 o; B
stat_flag = 0;# f& B1 Q% y% O7 ~
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asm("sei");
6 Z4 ?4 P4 z6 w. u return;+ y! X8 j, B- L/ m- a
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if(bit == 9)/ n: ^ W/ o9 @9 ?0 R% d( _6 l. N6 D
{
: u+ s+ z" l$ R( [ if(!(IORxd_PIN & (1<<IORxd_BIT))) {
8 D/ S# O: ? w% i2 b' O) E asm("sei");
- L& M; T& e4 v! ^' w return;& E( x6 \" ^# S! ^+ j
}
q1 c* f" E4 A! g6 V3 J& A" |' P count++;' V& ?5 R- j, X3 p9 d! |
if(count >= 3 ){
% k' V# s) ]2 A; M. m0 ]; R bit = 0; x3 K2 D+ ^9 ^3 X
count = 0;
3 i: A- x! t; z6 l8 C9 C Uart1_recv_buf[Uart1_recv_pt++] = recv_byte;
3 \! t6 y p) W6 | if(Uart1_recv_pt>=63) Uart1_recv_pt = 62;
0 H9 c D4 k2 _) j Uart1_RX_overtimer = 100;+ e& Y" j7 j3 F2 S# o/ s
}
7 K& ^$ I- E6 I3 }+ L$ ~ asm("sei");) I$ O e1 K/ S5 h: i
return;
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tmp = tmp << 1;- \& ?8 s: C) P
if((IORxd_PIN & (1<<IORxd_BIT))) tmp++;
( U* @7 _9 J: x! t3 H+ c count ++;) ~2 A w4 ?2 \/ Z) b* t
if(count >= 3){2 j7 N% h+ e" U, G! g0 R( H/ \" g
recv_byte = recv_byte >> 1;* K0 \5 }1 y$ N+ B. f" Y
if( (tmp==3) || (tmp>4) ) recv_byte |= 0x80;! k. {; T |6 i0 H/ b
tmp = 0;; k$ K" O/ b1 ~& d, x1 [
count = 0;: N1 w5 K8 p" _% z
bit ++;. ]3 A" Z8 m# G
}
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{% d" Y% {' p1 Z# { c! b
count++;
5 t: ]' E2 _" T: z; W* U7 ? if(count >= 3)
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% e) p) \0 {0 H5 `: S3 z" v: ~ count = 0;$ a. {7 ~2 ]6 H' ~. h/ r
if(bit == 0){. h! [, o7 a( Q, F$ t
IoTxd_PORT &= ~(1<<IOTxd_BIT);
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& k9 |4 a. r, @. z1 _" x else if(bit == 9)! n# M/ D* ^8 O. y8 H
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IOTxd_PORT |= (1<<IOTxd_BIT);6 h8 M; f% x$ n% ~
Uart1_send_pt ++;
( P! ~) G: ~- R% w G if(Uart1_send_pt >= Uart1_neet_send){
& r# e3 |; o2 H& Q6 K9 h8 P& g9 ^ Uart1_send_haveframe = NONE;
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else
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if((Uart1_send_buf[Uart1_send_pt] & (1<<(bit-1))) == 0) IOTxd_PORT &= ~(1<<IOTxd_BIT);! T3 F& x6 d1 @1 a# i' N
else IOTxd_PORT |= (1<<IOTxd_BIT);1 y, E5 u- |& a: Q8 p
}
% t* J8 j# {' k! S. h9 g if(bit >= 9) bit = 0;
# _9 o( J2 D1 Y; H8 h/ j else bit ++;$ P* Y! h2 o4 D; B0 D: Y
}
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6 p8 S Z5 H) q" s; E: U asm("sei"); & H6 l& Y" o# w
}
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发表于 2022-3-10 10:14
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