然后把以下代码文件和main.c放到一起——usart.c
- #include "sys.h"
- #include "usart.h"
- //STM32F103ºËÐİåÀý³Ì
- //¿âº¯Êý°æ±¾Àý³Ì
- /********** mcudev.taobao.com ³öÆ· ********/
- //
- //Èç¹ûʹÓÃucos,Ôò°üÀ¨ÏÂÃæµÄÍ·Îļþ¼´¿É.
- #if SYSTEM_SUPPORT_UCOS
- #include "includes.h" //ucos ʹÓÃ
- #endif
- //
- //STM32¿ª·¢°å
- //´®¿Ú1³õʼ»¯
- //
-
- //
- //¼ÓÈëÒÔÏ´úÂë,Ö§³Öprintfº¯Êý,¶ø²»ÐèҪѡÔñuse MicroLIB
- #if 1
- #pragma import(__use_no_semihosting)
- //±ê×¼¿âÐèÒªµÄÖ§³Öº¯Êý
- struct __FILE
- {
- int handle;
- };
- FILE __stdout;
- //¶¨Òå_sys_exit()ÒÔ±ÜÃâʹÓðëÖ÷»úģʽ
- void _sys_exit(int x)
- {
- x = x;
- }
- //ÖØ¶¨Òåfputcº¯Êý
- int fputc(int ch, FILE *f)
- {
- while((USART1->SR&0X40)==0);//Ñ»··¢ËÍ,Ö±µ½·¢ËÍÍê±Ï
- USART1->DR = (u8) ch;
- return ch;
- }
- #endif
- /*ʹÓÃmicroLibµÄ·½·¨*/
- /*
- int fputc(int ch, FILE *f)
- {
- USART_SendData(USART1, (uint8_t) ch);
- while (USART_GetFlagStatus(USART1, USART_FLAG_TC) == RESET) {}
-
- return ch;
- }
- int GetKey (void) {
- while (!(USART1->SR & USART_FLAG_RXNE));
- return ((int)(USART1->DR & 0x1FF));
- }
- */
-
- #if EN_USART1_RX //Èç¹ûʹÄÜÁ˽ÓÊÕ
- //´®¿Ú1ÖжϷþÎñ³ÌÐò
- //×¢Òâ,¶ÁÈ¡USARTx->SRÄܱÜÃâĪÃûÆäÃîµÄ´íÎó
- u8 USART_RX_BUF[USART_REC_LEN]; //½ÓÊÕ»º³å,×î´óUSART_REC_LEN¸ö×Ö½Ú.
- //½ÓÊÕ״̬
- //bit15£¬ ½ÓÊÕÍê³É±êÖ¾
- //bit14£¬ ½ÓÊÕµ½0x0d
- //bit13~0£¬ ½ÓÊÕµ½µÄÓÐЧ×Ö½ÚÊýÄ¿
- u16 USART_RX_STA=0; //½ÓÊÕ״̬±ê¼Ç
-
- void uart_init(u32 bound){
- //GPIO¶Ë¿ÚÉèÖÃ
- GPIO_InitTypeDef GPIO_InitStructure;
- USART_InitTypeDef USART_InitStructure;
- NVIC_InitTypeDef NVIC_InitStructure;
-
- RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1|RCC_APB2Periph_GPIOA, ENABLE); //ʹÄÜUSART1£¬GPIOAʱÖÓ
- //USART1_TX PA.9
- GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9; //PA.9
- GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
- GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP; //¸´ÓÃÍÆÍìÊä³ö
- GPIO_Init(GPIOA, &GPIO_InitStructure);
-
- //USART1_RX PA.10
- GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10;
- GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;//¸¡¿ÕÊäÈë
- GPIO_Init(GPIOA, &GPIO_InitStructure);
- //Usart1 NVIC ÅäÖÃ
- NVIC_InitStructure.NVIC_IRQChannel = USART1_IRQn;
- NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority=3 ;//ÇÀÕ¼ÓÅÏȼ¶3
- NVIC_InitStructure.NVIC_IRQChannelSubPriority = 3; //×ÓÓÅÏȼ¶3
- NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; //IRQͨµÀʹÄÜ
- NVIC_Init(&NVIC_InitStructure); //¸ù¾ÝÖ¸¶¨µÄ²ÎÊý³õʼ»¯VIC¼Ä´æÆ÷
-
- //USART ³õʼ»¯ÉèÖÃ
- USART_InitStructure.USART_BaudRate = bound;//Ò»°ãÉèÖÃΪ9600;
- USART_InitStructure.USART_WordLength = USART_WordLength_8b;//×Ö³¤Îª8λÊý¾Ý¸ñʽ
- USART_InitStructure.USART_StopBits = USART_StopBits_1;//Ò»¸öֹͣλ
- USART_InitStructure.USART_Parity = USART_Parity_No;//ÎÞÆæÅ¼Ð£Ñéλ
- USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;//ÎÞÓ²¼þÊý¾ÝÁ÷¿ØÖÆ
- USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx; //ÊÕ·¢Ä£Ê½
- USART_Init(USART1, &USART_InitStructure); //³õʼ»¯´®¿Ú
- USART_ITConfig(USART1, USART_IT_RXNE, ENABLE);//¿ªÆôÖжÏ
- USART_Cmd(USART1, ENABLE); //ʹÄÜ´®¿Ú
- }
- void USART1_IRQHandler(void) //´®¿Ú1ÖжϷþÎñ³ÌÐò
- {
- u8 Res;
- #ifdef OS_TICKS_PER_SEC //Èç¹ûʱÖÓ½ÚÅÄÊý¶¨ÒåÁË,˵Ã÷ҪʹÓÃucosIIÁË.
- OSIntEnter();
- #endif
- if(USART_GetITStatus(USART1, USART_IT_RXNE) != RESET) //½ÓÊÕÖжÏ(½ÓÊÕµ½µÄÊý¾Ý±ØÐëÊÇ0x0d 0x0a½áβ)
- {
- Res =USART_ReceiveData(USART1);//(USART1->DR); //¶ÁÈ¡½ÓÊÕµ½µÄÊý¾Ý
-
- if((USART_RX_STA&0x8000)==0)//½ÓÊÕδÍê³É
- {
- if(USART_RX_STA&0x4000)//½ÓÊÕµ½ÁË0x0d
- {
- if(Res!=0x0a)USART_RX_STA=0;//½ÓÊÕ´íÎó,ÖØÐ¿ªÊ¼
- else USART_RX_STA|=0x8000; //½ÓÊÕÍê³ÉÁË
- }
- else //»¹Ã»ÊÕµ½0X0D
- {
- if(Res==0x0d)USART_RX_STA|=0x4000;
- else
- {
- USART_RX_BUF[USART_RX_STA&0X3FFF]=Res ;
- USART_RX_STA++;
- if(USART_RX_STA>(USART_REC_LEN-1))USART_RX_STA=0;//½ÓÊÕÊý¾Ý´íÎó,ÖØÐ¿ªÊ¼½ÓÊÕ
- }
- }
- }
- }
- #ifdef OS_TICKS_PER_SEC //Èç¹ûʱÖÓ½ÚÅÄÊý¶¨ÒåÁË,˵Ã÷ҪʹÓÃucosIIÁË.
- OSIntExit();
- #endif
- }
- #endif
|