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- 2017-10-28
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楼主 |
发表于 2017-10-28 17:43:37
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贴上代码:
void USART1_Config(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
USART_InitTypeDef USART_InitStructure;
//Ïàó|ê±Öóê1Äü
RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1 , ENABLE); //ê1ÄüUSART1ê±Öó
RCC_AHB1PeriphClockCmd( RCC_AHB1Periph_GPIOB , ENABLE); //ê1ÄüGPIOBê±Öó
//′®¿ú1¶Ôó|òy½Å¸′óÃó3éä
GPIO_PinAFConfig(GPIOB,GPIO_PinSource6,GPIO_AF_USART1); //GPIOB9¸′óÃÎaUSART1
GPIO_PinAFConfig(GPIOB,GPIO_PinSource7,GPIO_AF_USART1); //GPIOB10¸′óÃÎaUSART1
//USART1¶Ë¿úÅäÖÃ
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6 | GPIO_Pin_7; //TX | RX
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;//¸′óÃ1|Äü
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; //Ëù¶è50MHz
GPIO_InitStructure.GPIO_OType = GPIO_OType_PP; //íÆíì¸′óÃêä3ö
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;
GPIO_Init(GPIOB,&GPIO_InitStructure); //3õê¼»ˉPA9,PA10
NVIC_Configuration();
//USART1 3õê¼»ˉéèÖÃ
USART_InitStructure.USART_BaudRate = 115200; //2¨ìØÂêéèÖÃ
USART_InitStructure.USART_WordLength = USART_WordLength_8b; //×Ö3¤Îa8λêy¾Y¸ñê½
USART_InitStructure.USART_StopBits = USART_StopBits_1; //ò»¸öí£Ö1λ
USART_InitStructure.USART_Parity = USART_Parity_No ; //ÎTÆæÅ¼¼ìÑéλ
USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None; //ÎTó2¼têy¾Yá÷¿ØÖÆ
USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx; //êÕ·¢Ä£ê½
USART_Init(USART1, &USART_InitStructure); //3õê¼»ˉ′®¿ú1
USART_ITConfig(USART1, USART_IT_RXNE, ENABLE); //¿aÆôÏà1ØÖD¶Ï
USART_Cmd(USART1, ENABLE); //ê1Äü′®¿ú1
}
void NVIC_Configuration(void)
{
NVIC_InitTypeDef NVIC_InitStructure;
/* Configure the NVIC Preemption Priority Bits */
NVIC_PriorityGroupConfig(NVIC_PriorityGroup_0);
/* Enable the USARTy Interrupt */
NVIC_InitStructure.NVIC_IRQChannel = USART1_IRQn; //′®¿ú1ÖD¶Ïí¨μà
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0x00; //ÇàÏèóÅÏè¼¶
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0x02; //×óóÅÏè¼¶
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; //IRQí¨μàê1Äü
NVIC_Init(&NVIC_InitStructure); //¸ù¾YÖ¸¶¨μÄ2Îêy3õê¼»ˉVIC¼Ä′æÆ÷
}
/*
* oˉêyÃû£ofputc
* Ãèêö £oÖØ¶¨Ïòc¿aoˉêyprintfμ½USART1
* êäèë £oÎT
* êä3ö £oÎT
* μ÷óÃ £oóéprintfμ÷óÃ
*/
int fputc(int ch, FILE *f)
{
/* ½« rintfÄúèY·¢íù′®¿ú */
USART_SendData(USART1, (unsigned char) ch);
/* μè′y·¢Ëííê±Ï */
while (USART_GetFlagStatus(USART1, USART_FLAG_TC) == RESET);
return (ch);
}
/// ÖØ¶¨Ïòc¿aoˉêyscanfμ½USART1
int fgetc(FILE *f)
{
/* μè′y′®¿ú1êäèëêy¾Y */
while (USART_GetFlagStatus(USART1, USART_FLAG_RXNE) == RESET);
return (int)USART_ReceiveData(USART1);
}
int main(void)
{
/* USART1 config 115200 8-N-1 */
USART1_Config();
printf("\r\n this is a USART Interrupt demo \r\n");
//delay(0x0FFFEF);
while (1)
{
}
} |
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