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void USART3_Initialise( u32 bound )
{ GPIO_InitTypeDef GPIO_InitStructure; NVIC_InitTypeDef NVIC_InitStructure; USART_InitTypeDef USART_InitStructure; /* Enable the USART3 Pins Software Remapping */ RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB| RCC_APB2Periph_AFIO ,ENABLE); GPIO_PinRemapConfig(GPIO_FullRemap_USART3, ENABLE); RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART3, ENABLE); /* Configure USART3 Rx (PB.11) as input floating */ GPIO_InitStructure.GPIO_Pin = GPIO_Pin_11; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING; GPIO_Init(GPIOB, &GPIO_InitStructure); /* Configure USART3 Tx (PB.10) as alternate function push-pull */ GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10; GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP; GPIO_Init(GPIOB, &GPIO_InitStructure); /* Enable the USART3 Interrupt */ NVIC_PriorityGroupConfig(NVIC_PriorityGroup_3); NVIC_InitStructure.NVIC_IRQChannel = USART3_IRQn; NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1; NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1; NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; NVIC_Init(&NVIC_InitStructure); USART_InitStructure.USART_BaudRate = bound; 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; USART_Init(USART3, &USART_InitStructure); USART_ITConfig(USART3, USART_IT_RXNE, ENABLE); USART_Cmd(USART3, ENABLE); USART_ClearFlag(USART3, USART_FLAG_TXE); } // USART3DATA[20]=0; void USART3_IRQHandler(void) //´®¿ÚÖжÏÊäÈë { static u8 i = 0; u8 data = 0; if(USART_GetFlagStatus(USART3, USART_FLAG_RXNE) == SET) { data = USART_ReceiveData(USART3); //i++; //if(i == 9) //{ //i = 0; //temp1 = 1; // } USART_SendData(USART3, data); } } |
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GPIO_InitTypeDef GPIO_InitStructure;
NVIC_InitTypeDef NVIC_InitStructure; USART_InitTypeDef USART_InitStructure; /* Enable the USART3 Pins Software Remapping */ RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB| RCC_APB2Periph_AFIO ,ENABLE); GPIO_PinRemapConfig(GPIO_FullRemap_USART3, ENABLE); RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART3, ENABLE); |
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告诉你,能用。以前用过。
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万恶的,你你确定以前你用的是STM32F103C8T6,亲测不行,STM32F103ZET6 可以用。复用映射的
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c8t6是可以映射的 |
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c8t6的串口3好像只能发送,不能接受
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