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本帖最后由 Heaven_1 于 2022-3-10 13:54 编辑
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6 b. t/ A4 U* a; R//该模拟串口为半双工模式， 2400/8/N/1
3 k! c, F! D! ?//如需不同波特率改变T2定时器的时间便可: U* b) T8 k. k% q/ m1 d& E1 d! B
/ r. ~4 G0 }& j1 n6 {
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#pragma vector = TIMER2_OVF_vect
7 y6 R/ J% Q* d i) ]$ M7 p4 w3 c__interrupt& A4 n1 h' T% I" z
void T2time139us(void)
, i( B) z: y; w9 A( M2 h{" d3 `3 X9 v& a" U8 k# ^
static unsigned char bit;
" E, ^# J3 |, W static unsigned char count;* f5 i. X k# U$ T ^6 g
static unsigned char stat_flag;5 e7 p2 e, [- p1 t, }) N" T
static unsigned char tmp;
; w0 B5 o3 ?8 Y3 U2 w static unsigned char recv_byte;
! z. b& ~/ K+ e E. x i TCNT2 = 152;
& C& c! D. \1 Y5 t1 T2 e
$ z1 K8 ]2 P2 J6 w3 X7 m* G if((Uart1_RX_overtimer != 0) && (Uart1_RX_overtimer != 0xff)){
+ M2 i0 T/ p3 }7 J# z2 b Uart1_RX_overtimer--;
+ {. d/ t& i" ` }
* i; @# @2 b6 T# d" }% U
8 k# p+ L6 J3 \0 {- r9 I if( Uart1_RX_overtimer == 0 ){
3 d- h; e7 |; {* R7 @1 u' L asm("sei");
, S7 `$ [& R3 m( j# G return;
2 U- C- X+ F- b1 q+ P }
" i2 r( A5 }& d8 K% B( Z 3 Z* F2 X! b4 u! [1 ?
if(Uart1_send_haveframe == NONE)* K2 B5 F& g9 E
{
* J/ N" @- K* p( x5 _" w& l! P. { if(Uart1_recv_haveframe != NONE) {
) l4 ]+ W, `! o asm("sei");
4 l6 u3 S; w- o3 H0 A return;8 c4 Q& F& |8 s, p: I
}5 X: V- c0 E2 z0 p: q
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if(stat_flag == 0xa5){! b) D( Q; ]; |- b/ {, p& t
stat_flag = 0;
" |$ k9 Z$ N. u- ?! K9 x8 L bit = 1;
( }3 X' L: ^% P, ? count = 0;. ^: o9 e& H' V2 ]& a
tmp = 0;
* `3 T7 j1 n+ Y/ a* K: A recv_byte = 0;
' `* w8 O& f6 a8 E! L asm("sei");
: s$ q7 K/ @9 M& g: T return;
7 n7 s X! j3 O' x* u2 ]) W( f0 B }4 A6 Y$ g) T6 Q# m
if(bit == 0)' `! O5 R5 }/ T6 I% b i
{
( m7 h# o- J. x if(!(IORxd_PIN & (1<<IORxd_BIT))){
3 E& j7 C" V; P: _' x+ S count ++;
$ D: |2 N( d' W if(count >= 2) stat_flag = 0xa5;6 U) b' K% M: ^3 E4 u6 v
} [8 G$ p5 U. @" T) @8 E
else{
) R" b# ?0 g/ \7 b+ v- y$ D, g& |8 Z count = 0;
5 c# {' I4 C6 ]$ o) w stat_flag = 0;
) |/ P# j# J: b8 t1 c }
9 g; u. Y A; ?' G asm("sei");% V7 x2 \( S: Q
return;) _; |7 H3 ?2 a3 t7 g$ w- a2 G
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if(bit == 9)+ x" L1 Z2 P3 t0 v# c! f
{
# i% E p! G1 v) Y9 i. k% z4 \ if(!(IORxd_PIN & (1<<IORxd_BIT))) {' W# E: D& {- n! q' _
asm("sei");
f* _ O6 u- O0 G return;- J5 a# M2 l4 ^& {$ `" Y
}
k5 u2 l' j( S count++;
- k' q; F2 k( }- h, m- t R if(count >= 3 ){
" ~8 g- M4 Y) @ bit = 0;" ]* D* j1 {5 U( ?% d: h3 K2 \7 J) M* H7 H
count = 0;
& |7 g i* I3 p G! s2 s Uart1_recv_buf[Uart1_recv_pt++] = recv_byte;3 ?. U9 _) P! L) g
if(Uart1_recv_pt>=63) Uart1_recv_pt = 62;9 Q4 _; C# g8 p! B
Uart1_RX_overtimer = 100;' x% k: G9 `9 x ]- _
}
/ \/ }9 X* f4 \ asm("sei");* n2 c$ U3 m9 U% {7 ]1 n
return;
4 I/ @. w0 M3 K9 z: z6 d* o" ` }6 z% U1 V) S1 H1 y8 i% L
tmp = tmp << 1;7 X4 F0 L% P4 C4 l
if((IORxd_PIN & (1<<IORxd_BIT))) tmp++;( x, X/ }, [+ D8 I9 U) u8 N% {1 @1 E
count ++;' y7 O9 B0 b2 y
if(count >= 3){
' |& f9 ]/ K' e- P$ f; F2 F recv_byte = recv_byte >> 1;
* K( E7 ~/ F# X3 v1 U; j1 B if( (tmp==3) || (tmp>4) ) recv_byte |= 0x80;" b8 G6 l4 D: z" k9 F! I
tmp = 0;' ]5 _& O4 f) H" j( I
count = 0;# r3 _$ d Q7 j0 S/ p% W! ?5 Z
bit ++;- l1 m4 j3 _- U/ y% a% p5 r8 W
}
F! F) b8 r$ } }
. k }2 H- M, Q else8 c; n: X8 L0 F* _, j$ _% M+ i9 w
{
L7 i0 e0 H' Q, p4 ? count++;6 i1 J. |) I; H) T: K
if(count >= 3)
5 O8 n7 a8 O# V {
$ m e4 Y! A1 h3 a) r count = 0; S. p c0 \) b
if(bit == 0){4 f7 H' k1 t8 M$ i. f% [; k6 o
IoTxd_PORT &= ~(1<<IOTxd_BIT);
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else if(bit == 9)
) Q' [/ {$ @5 [, q- F: q {8 _$ j) ~7 f$ j9 e" F
IOTxd_PORT |= (1<<IOTxd_BIT);
Q2 J. T: \2 H+ J9 I Uart1_send_pt ++;/ s2 U- g3 w3 V$ ~: E
if(Uart1_send_pt >= Uart1_neet_send){3 ]: o! ` u* ^" W1 Q0 n
Uart1_send_haveframe = NONE;5 M- k8 Z0 z4 X6 V7 M; ?$ V
}. t Q; B+ |; k; l
}
3 E A* H b; R! t `$ H else
+ Q4 W8 ~7 K$ k7 W: i" L$ v: N3 W {
$ T3 s% X9 ?0 r if((Uart1_send_buf[Uart1_send_pt] & (1<<(bit-1))) == 0) IOTxd_PORT &= ~(1<<IOTxd_BIT);
$ O; j, ^& e9 z) j' E else IOTxd_PORT |= (1<<IOTxd_BIT);
u1 y$ D8 Z7 c }
! ~) _* L! I4 m$ V/ v6 w: C# p5 u if(bit >= 9) bit = 0;
8 f+ E+ |* i; V2 u) V else bit ++;
6 S6 m% Z M2 C9 \ }7 h- }9 V5 [& X$ o' ]
}
/ }- V+ G5 Z8 F asm("sei"); " \* v# Z( Z8 u0 f+ ~+ p |
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发表于 2022-3-10 10:14
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