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本帖最后由 Heaven_1 于 2022-3-10 13:54 编辑
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//该模拟串口为半双工模式， 2400/8/N/1
( e6 D1 @( Z& I# g* S I; H3 o7 E//如需不同波特率改变T2定时器的时间便可. {; P$ a9 P1 a% D5 \' u
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" n+ M* @$ Z1 _" d+ O& S7 o- c5 ]#pragma vector = TIMER2_OVF_vect7 z* U$ v3 n* U9 Z" A/ ]. {) g
__interrupt
' o8 M# e" M, u1 Y) x% Jvoid T2time139us(void)% N7 r% P* K) R r7 r# N# C, d
{
8 `- w' o3 A! `( |% C static unsigned char bit;9 I' w! `8 N0 y" ^3 ?7 |) M
static unsigned char count;% }0 y |$ i* ^& V: A3 p" q/ q. N3 u
static unsigned char stat_flag;; L# p5 g6 T4 N: Z1 a
static unsigned char tmp;; J- K+ ?8 P8 ^$ w
static unsigned char recv_byte;
& G3 O( L# @# m) l$ R$ M1 D/ K$ c TCNT2 = 152;
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if((Uart1_RX_overtimer != 0) && (Uart1_RX_overtimer != 0xff)){
; \! y2 c( _! c0 ~/ X Uart1_RX_overtimer--;
5 i- ?6 U' a' g+ ? }
2 C3 z, ^. s1 Q
9 x( o' X0 m z: } if( Uart1_RX_overtimer == 0 ){
1 Q* F9 [2 A8 T: y asm("sei");: Y* ^ A, q& D2 v
return;" {) j0 W3 g2 w" r) x# `
}
# M! |2 G: f' f- s
4 ~7 s3 a* U0 P, m a8 o$ ] if(Uart1_send_haveframe == NONE)4 O4 y3 t7 J/ O- W( p% P! }
{
6 T( b0 T: `' D! }' @ if(Uart1_recv_haveframe != NONE) {
& e. E* x; ^5 p% i3 ^ asm("sei");
$ j& l% K8 R" X* m- B9 n9 ~% @ return;
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7 t, @7 E% G! u$ |/ k; ` if(stat_flag == 0xa5){
4 t9 i! z7 T( M9 @ stat_flag = 0;' P. y, E1 i# v% N( v8 R' b( ~6 {1 t4 n
bit = 1;
0 F+ a5 \+ ~, J- I. }4 ]! p count = 0;! v( X7 T# R4 \6 D& ^+ J
tmp = 0;
6 u. O2 O! N0 ^3 M& a. D | e recv_byte = 0;* t4 G6 h1 B# g( v1 U
asm("sei");$ ~+ D% i" l7 q! l' {# q
return;
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! `" x' E% v4 n$ T if(bit == 0)$ z2 w. E0 b: J( w+ C( M
{# D! P( s. s- ^( o. m
if(!(IORxd_PIN & (1<<IORxd_BIT))){
I# O& B2 U/ C1 W0 U, } count ++;( S4 b6 m( [ W. E/ U* P3 s: A
if(count >= 2) stat_flag = 0xa5;
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else{( {( g3 h3 ^& e
count = 0;
4 ?+ X+ ?7 E1 F stat_flag = 0;8 G7 @; @2 R% z, K: Y7 x
}
6 I% x5 |0 `$ Y1 C9 m, i) K asm("sei");9 U' t0 l' s2 d, _/ J/ G: Z! O
return;
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if(bit == 9)0 i/ h/ x4 _# O1 ]6 d: ~
{
$ _ V% B6 x$ b; w1 h! Z2 A9 W if(!(IORxd_PIN & (1<<IORxd_BIT))) {
5 {& N8 O4 Q4 z* j+ q asm("sei");& n. H& M+ [# h; d, I* t h
return;
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count++;6 X' B" M3 G" S; d; A! ~' v6 K
if(count >= 3 ){
. ~, D' [6 f( l/ @ bit = 0;
- ]* F1 X5 A) n& w+ V5 Z7 y count = 0;5 l _( e5 L/ t5 e9 b+ R( E
Uart1_recv_buf[Uart1_recv_pt++] = recv_byte;5 I- e: F1 h" c1 V
if(Uart1_recv_pt>=63) Uart1_recv_pt = 62;/ |% o9 f ^, v& t3 r# F4 n, m f
Uart1_RX_overtimer = 100;
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asm("sei");& m3 G) P- A, G; B3 F' y
return;& l/ z) G7 N3 N2 h
}
1 d0 N: y# `* A- f: G# S tmp = tmp << 1;# H- L* }3 c; D0 {
if((IORxd_PIN & (1<<IORxd_BIT))) tmp++;2 V- |/ R( d$ ?$ J, c
count ++;
! Y# o* y: f0 l1 `; u b if(count >= 3){
& C: A: [/ h3 {; s8 S1 P3 i7 p% X( W% B recv_byte = recv_byte >> 1;2 O+ L5 E6 M( {2 m5 O" Y. y
if( (tmp==3) || (tmp>4) ) recv_byte |= 0x80;" I9 q/ n! ~3 o5 X6 r
tmp = 0;
; q+ o! y# R$ ]4 @) s# H count = 0;) b( }# |! W( H8 G
bit ++;+ e( }! K P0 D9 s8 Y5 d& S
}
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else$ F! M* p! L* c% V5 M, o: V
{
! K/ ], [( e, {1 B; I3 z count++;. J4 y0 u6 Z4 j& N8 N6 P$ J, f7 f
if(count >= 3)1 J/ O, H# V6 T- \# W. y# s! s6 d
{
" d$ J" x( i" x6 p) M count = 0;
! Y. y' ?& x& I8 c z8 P if(bit == 0){
- B K: |8 O9 R IoTxd_PORT &= ~(1<<IOTxd_BIT);% B$ A8 e9 _4 p& e" o, _
}
) S* u6 [" D0 I7 ~8 O. k3 T( x else if(bit == 9) ~/ y5 t" j ?
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IOTxd_PORT |= (1<<IOTxd_BIT);
- Z. i& q( { X E2 c j Uart1_send_pt ++;
3 q- o2 x9 h: _% Y if(Uart1_send_pt >= Uart1_neet_send){/ O+ l9 k5 r3 l- v; F6 G* N
Uart1_send_haveframe = NONE;- H1 T2 W& y g: H0 p6 \
}6 w/ @$ A/ @/ o/ N' M0 T g) }
}
$ H, f+ D) V2 H/ d, G else
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, }" N* @, Z$ v3 M1 ^8 \& N if((Uart1_send_buf[Uart1_send_pt] & (1<<(bit-1))) == 0) IOTxd_PORT &= ~(1<<IOTxd_BIT);2 ?- U. V8 B8 @0 N! y; d; p
else IOTxd_PORT |= (1<<IOTxd_BIT);
. U. Q6 `( {+ _- M* e1 Q }
/ H8 i+ q2 H! O2 h if(bit >= 9) bit = 0;2 y* s% N; S# M: S
else bit ++;$ Y; R8 H( K0 _2 \, X t5 @) ?3 q
}
' ^2 b. C: ^- O3 A }
. S" `/ C D0 S& f3 q' c4 J( o asm("sei"); 7 ]0 B- ~1 T+ r3 L' u
}
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发表于 2022-3-10 10:14
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