1. 为了能够支持printf函数2 p; }8 u( Y" Z+ ~4 N$ h7 a
定义如下
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8 N: X- |4 g4 w/ d+ M# w g+ U. J - /* With GCC/RAISONANCE, small printf (option LD Linker->Libraries->Small printf! Z& _/ A, j7 U% e6 G. ^
- set to 'Yes') calls __io_putchar() */
& Q6 S# s* T2 ?1 y - #define PUTCHAR_PROTOTYPE int __io_putchar(int ch)
V- M, ` R1 J" G - #else/ w' x p; ^3 m! G
- #define PUTCHAR_PROTOTYPE int fputc(int ch, FILE *f)
: w9 I" p# p) V" A# C; s5 g - #endif /* __GNUC__ */
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: Q' `6 V, @/ {; @2. UART IO及设置 初始化0 R0 w' `; ^# t: |
- void USART1_Configuration(uint32_t iBaudRate)//´®¿Ú³õʼ»¯º¯Êý
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2 K# Z! ^/ Y z# p* h/ @+ K- GPIO_InitTypeDef GPIO_InitStructure;! N) N' c# h# C- y. p" V
- USART_InitTypeDef USART_InitStructure;: }. p/ s: Q9 I, J+ z
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- RCC_AHBPeriphClockCmd( RCC_AHBPeriph_GPIOA, ENABLE);& V- \' P/ v' z$ x& Y
- RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1, ENABLE );1 z. q+ t+ v$ e* y& M/ I
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- GPIO_PinAFConfig(GPIOA,GPIO_PinSource2,GPIO_AF_1);6 q: q8 U4 W! Q9 G' A( Q% L; {$ V1 K
- GPIO_PinAFConfig(GPIOA,GPIO_PinSource3,GPIO_AF_1);
3 o' w0 T2 t: y7 C - /*
; J( w# A, G1 \" Q& o+ d" H# B* V - * USART1_TX -> PA2 , USART1_RX -> PA3! M7 G2 \" R- @/ T
- */
- a* N8 j. t4 z Z - GPIO_InitStructure.GPIO_Pin = GPIO_Pin_2|GPIO_Pin_3; * |" a/ l( w- B9 i2 z# k
- GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF; , ~$ V' N! l1 d$ f5 }- h5 S
- GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;! Y9 B3 R1 ]/ X
- GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;
7 Y+ ~5 l, i9 q1 J' T - GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; $ M0 f0 M% P- B+ ?9 i
- GPIO_Init(GPIOA, &GPIO_InitStructure); 7 w# Z% q& X+ r
: `+ \) m) b4 n- USART_InitStructure.USART_BaudRate = iBaudRate;//115200;//ÉèÖô®¿Ú²¨ÌØÂÊ
& x2 d7 o/ o8 R! N# q# }- k - USART_InitStructure.USART_WordLength = USART_WordLength_8b;//ÉèÖÃÊý¾Ýλ
, X: }* Q- ~) h - USART_InitStructure.USART_StopBits = USART_StopBits_1;//ÉèÖÃֹͣλ4 j- W. B* w5 a! }. G4 m% K- ~
- USART_InitStructure.USART_Parity = USART_Parity_No;//ÉèÖÃЧÑéλ
1 M, k& y* I) k; K& o& } - USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;//ÉèÖÃÁ÷¿ØÖÆ
9 r3 S4 M; b. k ~$ P& y h+ A - USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;//ÉèÖù¤×÷ģʽ
7 R2 A! D) C% M" A7 | - USART_Init(USART1, &USART_InitStructure); //ÅäÖÃÈë½á¹¹Ìå
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- USART_ITConfig(USART1,USART_IT_RXNE,ENABLE);- n% o3 i$ Z7 v
- USART_Cmd(USART1, ENABLE);//ʹÄÜ´®¿Ú17 N" R8 u4 a( z
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3. 设置UART接收中断
5 q6 p% W. x$ N( ^- void USART1_INT_Config(void)
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- T( t- j2 U+ X. i - NVIC_InitTypeDef NVIC_InitStructure;, b, L& }; t! r9 E, Y* _
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- /* UART1 clock enable */
% R$ \$ x' { I3 @ ^ - // RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM3, ENABLE);
% C# g, I9 X+ S, P( p - RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1, ENABLE );
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- /* UART1 ÖжÏǶÌ×Éè¼Æ*/7 h: Y( A1 y7 n& F
- NVIC_InitStructure.NVIC_IRQChannel = USART1_IRQn;0 z& ? _% A2 q' F
- NVIC_InitStructure.NVIC_IRQChannelPriority = 1;
4 N7 C6 J5 W: Y/ ~# s, V9 u; Q2 q* H - NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
- p3 u% {; l! u: M3 [9 \ - NVIC_Init(&NVIC_InitStructure);
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. d3 o0 ^5 V4 v8 n5 q+ n/ M; E4. 发送一个字节
3 ^' ]- p; k6 ^- `3 v0 Q- void UART1_SendByte(uint8_t byte) //·¢ËÍ1×Ö½ÚÊý¾Ý8 t6 Z. g& a* p
- {
1 |, s! M% V7 t - // RS485_C_HI;' P3 a5 k+ G+ g, Q: L. a
- while(!((USART1->ISR)&(1<<7)));
% G/ H# h" X, ]9 b - USART1->TDR=byte;
3 m1 v2 l7 P8 r( p - // RS485_C_LW;+ L+ K: e. {$ A/ J0 U* S& P4 [: v3 u
- }
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- 5. 发送BUFFER+ T' Z0 ^# Y! _8 L: P0 e; K: p# [; h
) c; D( _2 `6 h& j# T z6 ?- void UART1_SendData(uint8_t *Buffer, uint32_t Length)* ?# Z1 r, h# X* Q
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- // RS485_C_HI; 6 h! r0 r1 k- N2 m0 t$ H
- while(Length != 0)
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- while(!((USART1->ISR)&(1<<7)));//µÈ´ý·¢ËÍÍê- S* { L/ N5 V6 }/ e
- USART1->TDR= *Buffer;
/ e: w5 y6 `/ Z! a0 e% z( q - Buffer++;
7 m8 x3 E7 H$ g5 r5 ^0 O( c - Length--;' g( Y( }) {+ G4 n) U
- }
. p2 b2 N! e2 H, X - // RS485_C_LW;/ }3 K) m' D# _( S
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6. 接收一个字节- uint8_t UART_Recive(void)
7 _6 ]! V$ ]. P - {
9 A; d$ Z E0 X# Q - while(!(USART1->ISR & (1<<5)));//µÈ´ý½ÓÊÕµ½Êý¾Ý
' b' }, [0 E, @: A$ f( i - return(USART1->RDR); //¶Á³öÊý¾Ý
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- 7. PUCHAR_PROTOTYPE 函数5 I; I' i. [. \2 p+ f/ u8 Q- s
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- PUTCHAR_PROTOTYPE 8 j3 a1 b: Y8 c' `( s
- {
: n, L: v% F3 w8 @& N - /* ½«PrintfÄÚÈÝ·¢Íù´®¿Ú */
2 H0 @; V* L0 }* y$ _ - USART_SendData(USART1,(uint8_t) ch);
3 `5 K8 f( ?4 K3 g7 u - while (USART_GetFlagStatus(USART1, USART_FLAG_TXE) == RESET)
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# t8 o) K4 s0 {7 `) r- return (ch);) h. _* A# f! f. t+ Z
- }
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8. UART接收中断函数
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: `0 F/ ~2 Q) v) `6 C/ U$ y- void USART1_IRQHandler(void)# D: f+ c& c6 m* \' g* x
- {
, N6 r: m0 |" I* V7 W- v - if(USART_GetITStatus(USART1, USART_IT_RXNE) != RESET)
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- if(TimeInterval > 4 && TimeInterval < 6)' [5 t7 j3 g( E! u
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- Uart1_Cnt = 0;
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0 s4 k( R' }( O1 J1 J. M* c& L2 v - if(Uart1_Cnt > 60)
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" [+ }, o* [$ B8 P: Y8 [( E - Uart1_Cnt =0;
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9 k+ V5 f& |# D* h/ @* V! Z - /* if(Uart1_Cnt == 0)( s& u. [9 h8 } \- s; y$ w
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- Uart1_Cnt =0;0 ] s$ Y: j# \
- Uart1_RxBuf[Uart1_Cnt]=USART_ReceiveData(USART1);//¶ÁÈ¡UART1½ÓÊÕµ½µÄÊý¾Ý²¢Êä³ö
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! _# y7 u1 _. C+ j; B - else */& A$ P5 V3 D% ~8 C: x
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- Uart1_RxBuf[Uart1_Cnt]=USART_ReceiveData(USART1);//¶ÁÈ¡UART1½ÓÊÕµ½µÄÊý¾Ý²¢Êä³ö( X+ _. o' z6 g6 R; x. \! t5 z
- Uart1_Cnt++;
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& L' K# m/ B7 p2 o7 L c& o \ - // Uart1_Cnt++;0 p. |5 ?* s7 w( A% F
- TimeInterval = 0;: j& K! e* @: m. j4 d% ^
- TimeRxFlag = 1;# N+ k" M' \: e% ?0 H! N' ]8 x
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- }
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