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本帖最后由 Heaven_1 于 2022-3-10 13:54 编辑 * Z) T* ?+ K, a/ x0 @5 @8 |
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//该模拟串口为半双工模式， 2400/8/N/1
x9 F1 g7 y! s- p7 Y) L" M//如需不同波特率改变T2定时器的时间便可
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#pragma vector = TIMER2_OVF_vect; O2 M$ I! D3 U/ D7 b/ |
__interrupt& J5 R+ O0 _7 v( l
void T2time139us(void)
: T7 q ]7 k! p+ n: d8 O{
4 J% }* i: U; `7 l3 r- | static unsigned char bit;- x* i! B! J# F; H, m' b
static unsigned char count;
0 g& x" g& ^; b# q% K( i. g( d! Z4 s static unsigned char stat_flag;
' z' ?& X. D8 I static unsigned char tmp;
; y- i5 L$ Z8 N3 B# P; ?, C# j static unsigned char recv_byte;' p* S# Q0 b- _. _+ z
TCNT2 = 152;; N5 D7 Z4 s6 `2 c, L
6 [. O g- j3 g) Z9 w if((Uart1_RX_overtimer != 0) && (Uart1_RX_overtimer != 0xff)){! o+ X% C! M9 S0 X% m. F: t
Uart1_RX_overtimer--;/ A; K5 V7 c5 _+ F2 z/ N) `
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if( Uart1_RX_overtimer == 0 ){1 [% P: q& {9 R
asm("sei");9 Y- O% Z) B7 t+ Y
return;6 r, n( [/ o6 |+ h9 s+ z
}
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+ Z; H( v9 O0 }* P5 H { if(Uart1_send_haveframe == NONE)' Q# d, Q2 ?4 S
{
& B; e9 c& |/ w( S& B- U( \+ J if(Uart1_recv_haveframe != NONE) {9 C" T4 n: s5 Z& e
asm("sei");
* ?! P( ]; N: E- C- J. c return;$ I' u; ?* u, U; }) n
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( l7 R* z8 e C5 z7 Q6 I: @9 X! S: W if(stat_flag == 0xa5){! J& L) V r: v' z. h) r1 W; M4 L
stat_flag = 0;% f8 i% S1 U* k1 r6 P3 L; ~: {5 S
bit = 1;; d! l7 k8 n' m; V
count = 0;; Q" ^; I/ K1 H4 D1 P, Z
tmp = 0;2 @4 c$ R Q6 c/ C0 V8 M
recv_byte = 0;$ E. y$ T- Z* b8 t
asm("sei");
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if(bit == 0)
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( g8 ~4 {3 S* }2 j' }6 I& N e if(!(IORxd_PIN & (1<<IORxd_BIT))){
( o- S, y# C w0 x$ Z& D& \ count ++;
. Z# w- U5 s# d4 b" E1 d( \3 k if(count >= 2) stat_flag = 0xa5;
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count = 0;
0 K( J/ C! U E1 Y; d1 x1 p stat_flag = 0;/ C: U7 ~% m& x ~% y7 f
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asm("sei");. z, \# R# U) p! n! M% V
return;
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if(bit == 9)$ Q) x3 _: [( o$ d$ a
{
+ m- u1 x0 O) s$ } if(!(IORxd_PIN & (1<<IORxd_BIT))) {
" v' ?' v, q* L asm("sei");* _( V' z1 l* v% ^8 H5 s6 i) H0 O
return;
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count++;
3 Z0 R5 _' V! H1 d% Y if(count >= 3 ){
8 L' u- U5 ^2 {* I3 ?5 M, h! S bit = 0;
1 G0 p2 }9 X- ~ count = 0;
7 g% N, o' k0 S+ \) Z6 e- Q Uart1_recv_buf[Uart1_recv_pt++] = recv_byte;
1 B/ S3 Y6 y! w, e if(Uart1_recv_pt>=63) Uart1_recv_pt = 62;
4 s, f! h# v- e8 F Uart1_RX_overtimer = 100;' o5 Q* L; a* b3 B7 Y! x
}
3 y; L8 X+ n& }+ p( J, u asm("sei");
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tmp = tmp << 1;
$ W) z! n$ Q* Q9 C if((IORxd_PIN & (1<<IORxd_BIT))) tmp++;8 _% {5 q7 R% Q' u) E# W
count ++;
) s, n: f; ` C- ?' k8 M if(count >= 3){. ~ |, H. k" b* A8 m0 |" T
recv_byte = recv_byte >> 1;
3 K/ V: c* U+ a! T2 @& H if( (tmp==3) || (tmp>4) ) recv_byte |= 0x80;
9 r1 @5 u, v) X% M& C tmp = 0;
+ O$ x2 H0 F- D2 G: u count = 0;
$ a7 m# \6 v+ u- u* a. p bit ++;/ h9 g: F' a9 j
}
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else
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$ P6 h' w" [ ~5 }( Y count++;
. S7 f5 r: C- |5 j) Q: w6 I if(count >= 3), @* S4 z# m; K! |2 U' D* H
{
( ^9 q6 v/ i/ `/ c$ \& Y count = 0;2 v2 O$ U6 a/ W3 o' X
if(bit == 0){
+ U& M9 s2 \6 B+ k+ N1 C IoTxd_PORT &= ~(1<<IOTxd_BIT);
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else if(bit == 9)
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0 o2 h8 C: b6 M. b* s: }7 q# j! a, c IOTxd_PORT |= (1<<IOTxd_BIT);9 ~; v# B8 F( D6 j
Uart1_send_pt ++;( f# p4 }7 }5 g0 H1 p. E
if(Uart1_send_pt >= Uart1_neet_send){4 V) l# i% U$ E( q
Uart1_send_haveframe = NONE;
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else ~2 w9 V3 g5 Z0 ]2 W+ i
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if((Uart1_send_buf[Uart1_send_pt] & (1<<(bit-1))) == 0) IOTxd_PORT &= ~(1<<IOTxd_BIT);
, q5 z5 X/ c7 O: ?# g+ J, Y8 ^ else IOTxd_PORT |= (1<<IOTxd_BIT);) \; u: x& |% G
}
" l% z6 q! Q1 ~ if(bit >= 9) bit = 0;
# h- B* r3 H a5 c0 e4 W, p% m, ` else bit ++;7 t* }, S2 y1 e: [3 A; a- m
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asm("sei"); 1 a7 `5 A3 W9 P$ R8 ^8 L
}
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发表于 2022-3-10 10:14
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