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本帖最后由 Heaven_1 于 2022-3-10 13:54 编辑 8 Z4 C2 ?0 J" R% R3 V* C( H. J; @
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//该模拟串口为半双工模式， 2400/8/N/1
" D/ r( o/ z1 t//如需不同波特率改变T2定时器的时间便可: k$ y8 v T: e, v0 f
$ ^# j$ O9 m9 v M ~
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#pragma vector = TIMER2_OVF_vect; O4 r; N' B; |% Y. Q. m0 d/ }
__interrupt
* C# c, j* {4 B0 C" S7 \8 Tvoid T2time139us(void)2 O# [) [$ }1 X3 f4 ?% G
{
8 X* u6 R1 E& |+ v8 ^4 [ static unsigned char bit;9 B4 `/ ^4 ~- }3 G, }
static unsigned char count;$ H, S& h: a- e8 Z( J' r
static unsigned char stat_flag;
1 N5 O: I9 u& ~+ _+ n- X, R9 } static unsigned char tmp;
" H. |% E2 Y- L, r- a4 L) h static unsigned char recv_byte;
$ V4 t, J8 Y H [. J TCNT2 = 152;
U l5 T+ y! a4 i
- t) F, {: L0 p0 I% s* p. ` if((Uart1_RX_overtimer != 0) && (Uart1_RX_overtimer != 0xff)){) }) O9 K6 u4 x7 d" c
Uart1_RX_overtimer--;
# J9 X* h A- N! M5 K- ? }: a5 E2 T" }% Z4 O$ s* k# e, C; f
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if( Uart1_RX_overtimer == 0 ){
4 G k- H9 ^- Q: n7 J2 T asm("sei");( \! X0 Z1 p# r7 Z R
return;, ^2 t4 F# V7 ~ A
}
$ s6 s/ t( O0 q* H9 m: T7 b
* \2 b+ e1 r, O9 E if(Uart1_send_haveframe == NONE)$ L9 I* Z$ j: L* r8 r( h J
{# E) K- B4 Q0 x- z, ~
if(Uart1_recv_haveframe != NONE) {3 u8 _( [+ ^2 c
asm("sei");
y* H) ~4 D- u. I9 W8 N return;/ ^* D* ~( P( T2 Z1 q' N w% z2 J
}! \6 _# T2 a: p7 _3 ^
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if(stat_flag == 0xa5){+ F: y# ?5 F, p6 p O. Y
stat_flag = 0;
) r' a% a; @3 G& k( U1 ^ bit = 1;
?; q+ F3 O( j( I& L$ O count = 0;
# y4 t* @7 a- ?' F( b tmp = 0;! E% E2 D" ^( \0 @- }
recv_byte = 0;
* Q# M4 ]4 a1 Z' L asm("sei");$ l3 B; g# |1 m8 x/ n
return;
, X0 o1 C% i& J+ r# u5 v1 T) P }
8 M* m" P$ I) \6 M if(bit == 0)
/ |2 S9 q b4 A& G, R {* U) V0 Y4 T6 X; c) T3 P
if(!(IORxd_PIN & (1<<IORxd_BIT))){
7 J4 L5 `' d# C/ Q% G count ++;
6 [% U U$ `* b4 P3 L! r if(count >= 2) stat_flag = 0xa5;
_. h+ b/ V; Z }
/ }# `+ j" j9 F& J' f. } else{: M' c5 e" `2 z( _0 _
count = 0;( l7 G% a: ]- b3 r
stat_flag = 0;8 ~/ B" \, R( B/ ~; W( j4 H
}
# \( d* l! j+ I K" d; b4 J( H asm("sei");
$ j4 H) G2 P. ^, A* j" m return;
7 l- I- F( @' I% a- Z5 P }
6 l" A. r2 _& e% W if(bit == 9)" c6 [" m( l$ Z. Y" a) n5 l
{
& L9 h, l) B2 _( B' a3 K if(!(IORxd_PIN & (1<<IORxd_BIT))) {
% d5 J+ k1 z5 {+ I" ?" a) _ asm("sei");
5 J) i" I, V& }) U+ V6 a2 N2 A2 k return;
% w( f% Y# I5 }* s8 y6 I8 m }
; ?* L1 u3 z T L8 D count++;/ u8 G0 B; J4 i/ e1 j
if(count >= 3 ){
/ _/ _0 i" T# z+ E( {; U" P bit = 0;
1 V8 Y) s G" Q K7 r: n count = 0;
" u- o! v& B( @% h# N Uart1_recv_buf[Uart1_recv_pt++] = recv_byte;. m. D& W4 b6 c, t
if(Uart1_recv_pt>=63) Uart1_recv_pt = 62;
4 r& B* }" O3 N+ c/ t& l+ y7 _ Uart1_RX_overtimer = 100;
8 b1 H8 Y! T" z* e3 x0 I0 E }
5 w0 R8 U# h2 Z asm("sei");
) k& W/ o' M& F& P return;
P) H% E; g0 p# z/ s }
% Q1 u4 N6 q0 G; y# d8 @9 Q tmp = tmp << 1;: M) M/ m) U5 R" t' U( s
if((IORxd_PIN & (1<<IORxd_BIT))) tmp++;
; m$ x. C& c, M count ++;
) U( h- g& x+ p' {! m4 D) l if(count >= 3){
7 x" ~$ c% x4 R- U recv_byte = recv_byte >> 1;3 \3 k, t" I. e7 }$ N3 M7 |
if( (tmp==3) || (tmp>4) ) recv_byte |= 0x80;; ?/ Q- R( o% H5 l
tmp = 0;
6 m# H4 q, t) S& T' M count = 0;+ R" p+ K) I( s6 k* f- L
bit ++;( [! l9 p9 h; E8 C4 P
}! _1 _ I! O5 }8 \3 x L
}
! l, w* w z( R: z else
1 [9 _8 s& N6 P) c {6 V, X9 }9 V$ x+ Z' I; _/ W
count++;: P# S! Y& N8 c- V E& P
if(count >= 3)
+ ~3 }$ p5 a3 Z6 [4 S {
/ T g) w$ s3 G- E& Y- j/ @3 R# f count = 0;+ E# u8 q1 }( D \( x) _
if(bit == 0){' Y8 {# w- E+ s p. v6 J1 S
IoTxd_PORT &= ~(1<<IOTxd_BIT);% R$ u. r' `: E# t
}
6 _" |2 ?$ V' { else if(bit == 9)
# J5 p- [0 Z8 h {( w8 J1 `, i6 g5 J
IOTxd_PORT |= (1<<IOTxd_BIT);5 ^( g0 T( k2 z: V* l; S/ k6 U
Uart1_send_pt ++;
* U( b) J& v. e if(Uart1_send_pt >= Uart1_neet_send){
" j: {; J! b7 _+ M Uart1_send_haveframe = NONE;
/ @5 ]5 q; i) }: l* F7 L }
; i5 g) c* u" Y }
. I& r; l' v& v! O& Z else
5 J1 r+ V+ y8 _3 G8 i {
- P! m1 ~0 B# a1 l8 B: L } if((Uart1_send_buf[Uart1_send_pt] & (1<<(bit-1))) == 0) IOTxd_PORT &= ~(1<<IOTxd_BIT);
_& p, e) v4 W: B" f' B$ E else IOTxd_PORT |= (1<<IOTxd_BIT);' ^3 ^) t! j+ J3 c) O+ q, S( E
}; k6 L/ V, d- I" {% m' f
if(bit >= 9) bit = 0;9 g `% a- l* k4 y; m
else bit ++;, L) j }0 u& T
}0 r9 e H' @; \. f
}
+ ?3 ]2 d+ G1 ?9 ^& c asm("sei");
7 u6 e G+ Z: `. a! K}
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发表于 2022-3-10 10:14
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