1. 为了能够支持printf函数
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- #ifdef __GNUC__
4 B X8 d, Y+ G2 R: s' K - /* With GCC/RAISONANCE, small printf (option LD Linker->Libraries->Small printf4 A4 q' P2 U0 q" R" ^2 G6 D
- set to 'Yes') calls __io_putchar() *// T# Z8 N5 y; |9 h( b/ n0 D4 u
- #define PUTCHAR_PROTOTYPE int __io_putchar(int ch)- c; {) S6 A) C& Q5 ]' r
- #else6 D- ~/ Y" z# ~+ w& a$ t
- #define PUTCHAR_PROTOTYPE int fputc(int ch, FILE *f)
0 o" {( T% Z0 P" ]. c - #endif /* __GNUC__ */
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2. UART IO及设置 初始化
0 W7 o2 R3 y! Q7 ^" R! v- void USART1_Configuration(uint32_t iBaudRate)//´®¿Ú³õʼ»¯º¯Êý# b. V* T1 B6 [2 c% I$ ?
- {
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- GPIO_InitTypeDef GPIO_InitStructure;
0 w A% `. v; v6 X( I - USART_InitTypeDef USART_InitStructure;# A* |. c" L! @ [0 C
4 H/ Q3 Z! j% }) L* a s- RCC_AHBPeriphClockCmd( RCC_AHBPeriph_GPIOA, ENABLE);
/ {) F2 E0 w: { - RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1, ENABLE );
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- GPIO_PinAFConfig(GPIOA,GPIO_PinSource2,GPIO_AF_1);8 w) s& _, V- I! V$ z% Q
- GPIO_PinAFConfig(GPIOA,GPIO_PinSource3,GPIO_AF_1); $ ?4 S% w! V. Q) p- x, P
- /*
. @- C: U1 j3 h% Q- \5 g: R - * USART1_TX -> PA2 , USART1_RX -> PA3
) X: w1 @1 w6 S# N - */
|/ O. n7 E `. R; C8 d - GPIO_InitStructure.GPIO_Pin = GPIO_Pin_2|GPIO_Pin_3; 8 {9 i1 ^" I' ^2 ` {/ e
- GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
! U% h5 |/ i6 g* N; F - GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
5 l% V! D! a+ X" h3 w' i- { - GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;& `1 u& ^+ e3 e1 {0 _# y3 L) G
- GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; ) ^' \/ l; w7 u) D6 P0 J
- GPIO_Init(GPIOA, &GPIO_InitStructure);
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- USART_InitStructure.USART_BaudRate = iBaudRate;//115200;//ÉèÖô®¿Ú²¨ÌØÂÊ
) f4 u: s9 ^; N( f0 o( m' @* r3 B - USART_InitStructure.USART_WordLength = USART_WordLength_8b;//ÉèÖÃÊý¾Ýλ, C2 x0 Z8 d2 T8 e
- USART_InitStructure.USART_StopBits = USART_StopBits_1;//ÉèÖÃֹͣλ
& o' \" O2 R( ]$ A* O: x8 f - USART_InitStructure.USART_Parity = USART_Parity_No;//ÉèÖÃЧÑéλ
+ A y& y) n/ p! [7 ^ - USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;//ÉèÖÃÁ÷¿ØÖÆ. Y; W" e7 A8 Y5 r+ W
- USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;//ÉèÖù¤×÷ģʽ. X% L- q! X& U7 I/ T. \
- USART_Init(USART1, &USART_InitStructure); //ÅäÖÃÈë½á¹¹Ìå. s' F& g; d2 g1 C! H) g3 }
* I+ O( S7 ?. Z! a: ^9 l- USART_ITConfig(USART1,USART_IT_RXNE,ENABLE);( ~0 f, W$ D. o6 k7 V; \. w* n) C9 F
- USART_Cmd(USART1, ENABLE);//ʹÄÜ´®¿Ú1
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- }
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3. 设置UART接收中断5 l& ~6 j& Y$ ^1 W6 N9 L5 s
- void USART1_INT_Config(void)0 A! u# z* b( s) |0 ^' }
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- NVIC_InitTypeDef NVIC_InitStructure;
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- /* UART1 clock enable */: E: ^( h8 n9 D( B% C2 U4 I, z; G( _
- // RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM3, ENABLE);
. m' `# F, T( q$ e4 c, e - RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1, ENABLE );# l- C2 A+ B }9 \1 e+ G7 d3 w
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- /* UART1 ÖжÏǶÌ×Éè¼Æ*/& y% x' Y1 Y k: w3 H4 z; n2 _; j
- NVIC_InitStructure.NVIC_IRQChannel = USART1_IRQn;) X) c! S0 Q- L5 G2 g* M' | N
- NVIC_InitStructure.NVIC_IRQChannelPriority = 1;
) R( H* \- k: u; K, M! C# Q. u5 G - NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
2 x- U: \- q- d5 U( w- X - NVIC_Init(&NVIC_InitStructure);
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4. 发送一个字节# w% q T- U; \
- void UART1_SendByte(uint8_t byte) //·¢ËÍ1×Ö½ÚÊý¾Ý+ B( R5 _2 C& K! f4 w( c& S9 s' `5 i9 ?& l
- {
0 o8 X7 f! u7 c& N3 R$ K I3 P ] - // RS485_C_HI;
. _ Q$ {3 i5 O1 H0 S0 |* a - while(!((USART1->ISR)&(1<<7)));2 e2 [) M7 N, h0 ?
- USART1->TDR=byte; 4 h8 U" T: |; Y5 G: @
- // RS485_C_LW;
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- 5. 发送BUFFER$ Z! g1 @: n0 ?5 `& R- m' w8 I/ L
& Q; y* C# N+ t' Z! H- void UART1_SendData(uint8_t *Buffer, uint32_t Length) ~# f* L5 a" L
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- // RS485_C_HI;
1 i, C/ o$ V, n6 _/ g% o - while(Length != 0)
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- while(!((USART1->ISR)&(1<<7)));//µÈ´ý·¢ËÍÍê
0 C( X; X+ B/ ^7 R1 x% f - USART1->TDR= *Buffer;
( n1 e; Z9 p* G2 M! b1 t - Buffer++;
% Y, _" b' m7 t1 ]" B, } - Length--;
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8 W/ L' N- P4 Y- R7 I - // RS485_C_LW;4 T. H5 T2 _( ?( y" N, x" z% a1 _
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6. 接收一个字节- uint8_t UART_Recive(void); G# w% g; y& x- v" J: J
- {
: m2 f# I& p+ m) u - while(!(USART1->ISR & (1<<5)));//µÈ´ý½ÓÊÕµ½Êý¾Ý2 j$ S, ~7 y: j, g( c
- return(USART1->RDR); //¶Á³öÊý¾Ý
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- 7. PUCHAR_PROTOTYPE 函数
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- PUTCHAR_PROTOTYPE
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- /* ½«PrintfÄÚÈÝ·¢Íù´®¿Ú */
1 l; I; V/ p8 S/ H. k - USART_SendData(USART1,(uint8_t) ch);
2 r6 N3 `/ T; _* j( G' l - while (USART_GetFlagStatus(USART1, USART_FLAG_TXE) == RESET)) r( q! _8 r; d0 @6 W; h% O
- {}
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- return (ch);; c7 E* i, V4 ^: S# O7 S& E6 G
- }
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" z; R" y3 B+ [1 O6 M7 J; p8. UART接收中断函数- e2 z- D9 b- H
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- void USART1_IRQHandler(void)
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- if(USART_GetITStatus(USART1, USART_IT_RXNE) != RESET)
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- if(TimeInterval > 4 && TimeInterval < 6)" s* L% k# a+ |8 G
- {( o: O- P1 B5 m8 R; g, |: L
- Uart1_Cnt = 0;
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- if(Uart1_Cnt > 60)
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- Uart1_Cnt =0;, h/ n' R8 n0 d t
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- /* if(Uart1_Cnt == 0)
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( d8 b; \4 M" T3 v, c - Uart1_Cnt =0;
" P# S5 x3 H8 ~3 N t- i2 D6 F, X* q - Uart1_RxBuf[Uart1_Cnt]=USART_ReceiveData(USART1);//¶ÁÈ¡UART1½ÓÊÕµ½µÄÊý¾Ý²¢Êä³ö
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- else */9 e# C3 v9 x5 q0 X7 e/ _2 u
- {
! {7 P- {3 m) R6 T3 P$ k: ^5 s - Uart1_RxBuf[Uart1_Cnt]=USART_ReceiveData(USART1);//¶ÁÈ¡UART1½ÓÊÕµ½µÄÊý¾Ý²¢Êä³ö
6 q5 D2 t+ q+ T! d% m5 m - Uart1_Cnt++;
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0 D/ O& y$ |. }& C. v+ M - // Uart1_Cnt++;
3 _" g" \: K6 ]1 K2 Y - TimeInterval = 0;
. H4 a. m+ M' e( u$ |* b5 V$ p - TimeRxFlag = 1;, E$ i! y# f; i& H, r% j
- }
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