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本帖最后由 Heaven_1 于 2022-3-10 13:54 编辑 0 n0 B8 ^% K f
* [, S. V# }0 B& u1 r//该模拟串口为半双工模式， 2400/8/N/15 @2 N |* P9 r" D0 E) _4 n
//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
' r' r3 m7 M% q8 j' {9 r__interrupt
. `9 X8 ~- ^! m) nvoid T2time139us(void)
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static unsigned char bit;
5 f% z# p) }% P+ N/ f static unsigned char count;, ~( V) ~# b: K# {% X; v
static unsigned char stat_flag;0 m$ Y8 ?. L1 R" }* ~4 W$ k
static unsigned char tmp;( w+ b: `: u3 ~* Z0 [) q& m
static unsigned char recv_byte;
! b) [# Y5 O2 n1 U ^ TCNT2 = 152;1 R7 ?& i$ t, {+ o! B$ K3 P, ^5 n
; J) v. z. O5 ^8 N1 N6 ?3 W. X if((Uart1_RX_overtimer != 0) && (Uart1_RX_overtimer != 0xff)){
b! J9 F; E; l Uart1_RX_overtimer--;. I9 [. p6 i5 y; O8 p3 \/ F. J! |
}
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5 [; e% D7 J- Y# G; H if( Uart1_RX_overtimer == 0 ){- P$ d4 ]: @4 Y9 t2 N7 A% D$ W
asm("sei");. ]5 O0 X- V( @8 `/ p b
return;# q/ F7 W8 A P' ]# ]! w
}
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if(Uart1_send_haveframe == NONE)) \( v2 T0 C# L! b
{
7 ]6 x9 s, u# ~! Q" y7 Q if(Uart1_recv_haveframe != NONE) {
/ L& r* ^* q, T9 [ y: V asm("sei");
, d% @2 B$ |) A4 N1 r4 \5 p( } return;
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if(stat_flag == 0xa5){* e7 `/ Z4 n& w2 B- t
stat_flag = 0;
4 d5 ~* `& |+ W! x4 a. G5 m bit = 1;# |3 G5 I: }, l/ Y) m* A
count = 0;
7 |/ ]7 |8 C" _3 V6 r( L: L tmp = 0;/ ~* X$ ]# R. o5 r c6 \
recv_byte = 0;
7 _9 A$ I. A* g* { asm("sei");
* t/ B4 q2 i2 X1 e1 ?/ D return;
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if(bit == 0)
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if(!(IORxd_PIN & (1<<IORxd_BIT))){0 W" M# {3 e3 S- U6 x: Y0 s7 w
count ++;! \* f7 g& `9 v7 R! A6 f, Y! L/ ]
if(count >= 2) stat_flag = 0xa5;& }+ w+ I0 ^4 b3 z/ B
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else{% x) e( i7 ]( w. Z9 q
count = 0;
2 q+ l# F6 z: r% l& f$ S# z7 D1 ^ stat_flag = 0;
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asm("sei");
! H, {' c) I/ y8 q return;
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7 r4 E0 E7 \* ^ y; m if(bit == 9)6 R6 e, R0 y9 V a
{
3 |9 r" I4 h- @9 C if(!(IORxd_PIN & (1<<IORxd_BIT))) {
8 q! ^2 Q; Y/ z: k1 \5 m asm("sei");% |4 L9 |7 L! @ Z) P, W1 D
return;+ B+ a1 B9 S$ [0 s, V! X1 A$ o
}
) K! G9 B# v* |, `, _& B. {" I count++;* Y% Y8 H7 _- W% V
if(count >= 3 ){- @. c' l! w, l* ~7 F/ @6 z0 \
bit = 0;! c# a: V$ \1 G: Z; R
count = 0;
8 H' I5 a+ B4 `% U$ @2 I Uart1_recv_buf[Uart1_recv_pt++] = recv_byte;) p2 ?4 \) f5 M: Y1 R, F$ U
if(Uart1_recv_pt>=63) Uart1_recv_pt = 62;. `6 E- K$ h( P" P. p7 w% n1 ^- g
Uart1_RX_overtimer = 100;
2 ?$ w4 |" }" z2 g }
0 D: M2 Y ~$ Q* j' Y asm("sei");: I0 \+ M$ ~, g9 `
return;
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tmp = tmp << 1;
/ F0 C1 |3 G0 A: z if((IORxd_PIN & (1<<IORxd_BIT))) tmp++;
2 I, w. D5 I j/ x& D O count ++;4 R9 A* B2 h8 t4 Q! b6 j1 S6 @
if(count >= 3){& x* E) Y8 C9 v7 j/ s3 B
recv_byte = recv_byte >> 1;
* F$ [1 x3 k6 R/ k( e2 w) V: c if( (tmp==3) || (tmp>4) ) recv_byte |= 0x80;
0 f3 }6 `3 c1 { tmp = 0;
: V) L% s9 j' c. O# ~& V count = 0;
+ g# g5 w) p- _0 H O8 t. i bit ++;, W8 T/ @4 P3 H: P! q% d0 r5 L
}
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{
' U! S1 b k7 S count++;
6 }5 k6 ?' m5 [! P+ T if(count >= 3)
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count = 0;
( {( v" e* c6 l \ if(bit == 0){5 z7 b3 Q# C1 n8 r' r
IoTxd_PORT &= ~(1<<IOTxd_BIT);' t; ~. x7 G: V1 [( `
}
: p) c' d5 i6 X4 p; Q else if(bit == 9)
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6 p. t! W; F w! W IOTxd_PORT |= (1<<IOTxd_BIT);
$ Z5 [* d. p( B$ j% u7 B% n Uart1_send_pt ++;- X0 R z9 d+ K0 h
if(Uart1_send_pt >= Uart1_neet_send){7 S8 T H: ^% v6 a4 s9 x
Uart1_send_haveframe = NONE;
! A# ]& b3 [6 B% t/ B }
+ I1 M3 S- [) A$ d+ t" Z! v* I }
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{
1 i2 w0 K6 k2 _+ U! x: e3 Y0 X2 |1 D if((Uart1_send_buf[Uart1_send_pt] & (1<<(bit-1))) == 0) IOTxd_PORT &= ~(1<<IOTxd_BIT);
* v5 m! `& ~ b) x% E9 Y else IOTxd_PORT |= (1<<IOTxd_BIT);% o+ |( z6 M$ e; l
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if(bit >= 9) bit = 0;
, L- M8 ~9 I, b& h/ O else bit ++;2 x; {! `7 J4 ]: H6 C
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asm("sei");
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发表于 2022-3-10 10:14
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