|
发表于 2018-8-27 13:31:12
|
显示全部楼层
static void NVIC4_Configuration(void)
{
NVIC_InitTypeDef NVIC_InitStructure;
NVIC_InitStructure.NVIC_IRQChannel = UART4_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 4;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
}
void Initial_UART4(u32 baudrate)
{
GPIO_InitTypeDef GPIO_InitStructure;
USART_InitTypeDef USART_InitStructure;
/* ʹÄÜ UART4 Ä£¿éµÄʱÖÓ Ê¹ÄÜ UART4¶ÔÓ¦µÄÒý½Å¶Ë¿ÚPCµÄʱÖÓ*/
RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOC ,ENABLE);
RCC_APB1PeriphClockCmd(RCC_APB1Periph_UART4, ENABLE);
/* ÅäÖÃUART4 µÄ·¢ËÍÒý½Å
ÅäÖÃPC10 Ϊ¸´ÓÃÊä³ö Ë¢ÐÂƵÂÊ50MHz
*/
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
GPIO_InitStructure.GPIO_OType = GPIO_OType_PP; // ¸´ÓÃÍÆÍìÊä³ö
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;
GPIO_Init(GPIOC, &GPIO_InitStructure);
/*
ÅäÖÃUART4 µÄ½ÓÊÕÒý½Å
ÅäÖÃPC11Ϊ¸¡µØÊäÈë
*/
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_11;
GPIO_InitStructure.GPIO_OType = GPIO_OType_OD;
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;
GPIO_Init(GPIOC, &GPIO_InitStructure);
GPIO_PinAFConfig(GPIOC,GPIO_PinSource10,GPIO_AF_UART4);
GPIO_PinAFConfig(GPIOC,GPIO_PinSource11,GPIO_AF_UART4);
USART_DeInit(UART4);
/*
UART4µÄÅäÖÃ:
1.²¨ÌØÂÊΪµ÷ÓóÌÐòÖ¸¶¨µÄÊäÈë baudrate;
2. 8λÊý¾Ý USART_WordLength_8b;
3.Ò»¸öֹͣλ USART_StopBits_1;
4. ÎÞÆæżЧÑé USART_Parity_No ;
5.²»Ê¹ÓÃÓ²¼þÁ÷¿ØÖÆ USART_HardwareFlowControl_None;
6.ʹÄÜ·¢ËͺͽÓÊÕ¹¦ÄÜ USART_Mode_Rx | USART_Mode_Tx;
*/
USART_InitStructure.USART_BaudRate = baudrate;
USART_InitStructure.USART_WordLength = USART_WordLength_8b;
USART_InitStructure.USART_StopBits = USART_StopBits_1;
USART_InitStructure.USART_Parity = USART_Parity_No ;
USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;
//Ó¦ÓÃÅäÖõ½UART
USART_Init(UART4, &USART_InitStructure);
USART_ITConfig(UART4, USART_IT_RXNE, ENABLE); //ʹÄܽÓÊÕÖжÏ
//Æô¶¯UART
USART_Cmd(UART4, ENABLE);
NVIC4_Configuration(); //ÅäÖÃÖжÏÓÅÏȼ¶
} |
|