UART4,UART5【悬赏问答】
谁有串口4,5的程序，我的串口不好使，麻烦大侠给解答一下回复:UART4,UART5
我的初始化代码：#ifdef UART4_USE //与上位机通信
//使能时钟
RCC_APB1PeriphClockCmd(RCC_APB1Periph_UART4, ENABLE);
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOC, ENABLE);
//中断优先级
NVIC_InitStructure.NVIC_IRQChannel = UART4_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
//配置接收管脚PC11
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_11;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
GPIO_Init(GPIOC, &GPIO_InitStructure);
//配置发送管脚PC10
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
GPIO_Init(GPIOC, &GPIO_InitStructure);
//波特率、字长、停止位、奇偶校验位、硬件流控制、异步串口为默认（被屏蔽字设置）
USART_InitStructure.USART_BaudRate = UART4_RATE;
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(UART4, &USART_InitStructure);
USART_ITConfig(UART4, USART_IT_RXNE, ENABLE);
USART_Cmd(UART4, ENABLE);
回复:UART4,UART5【悬赏问答】
楼上的便是，不重复发了，说清楚你的为什么不好使？串口这玩意还比较简单哈RE:UART4,UART5【悬赏问答】
恩，建议楼主把原因说的明白点，以便大家能尽快帮你解决RE:UART4,UART5【悬赏问答】
这个你参考下：/*----------------------------------------------------------------------------
STM32 USART setup.
initializes the USARTx register
*----------------------------------------------------------------------------*/
__inline static void stm32_UsartSetup (void) {
if (__USART_USED & 0x01) { // USART1 used
RCC->APB2ENR |= RCC_APB2ENR_AFIOEN; // enable clock for Alternate Function
AFIO->MAPR &= ~(1 APB2ENR |= RCC_APB2ENR_IOPAEN; // enable clock for GPIOA
GPIOA->CRH &= ~(0xFFULCRH |=(0x0BULCRH |=(0x04ULAPB2ENR |= RCC_APB2ENR_AFIOEN; // enable clock for Alternate Function
AFIO->MAPR |= __USART1_REMAP; // set USART1 remap
RCC->APB2ENR |= RCC_APB2ENR_IOPBEN; // enable clock for GPIOB
GPIOB->CRL &= ~(0xFFULCRL |=(0x0BULCRL |=(0x04ULAPB2ENR |= RCC_APB2ENR_USART1EN; // enable clock for USART1
USART1->BRR= __USART_BRR(__PCLK2, __USART1_BAUDRATE); // set baudrate
USART1->CR1= __USART1_DATABITS; // set Data bits
USART1->CR2= __USART1_STOPBITS; // set Stop bits
USART1->CR1 |= __USART1_PARITY; // set Parity
USART1->CR3= __USART1_FLOWCTRL; // Set Flow Control
USART1->CR1 |= (USART_CR1_RE | USART_CR1_TE); // RX, TX enable
if (__USART_INTERRUPTS & 0x01) { // interrupts used
USART1->CR1 |= __USART1_CR1;
USART1->CR2 |= __USART1_CR2;
USART1->CR3 |= __USART1_CR3;
NVIC->ISER |= (1 CR1 |= USART_CR1_UE; // USART enable
} // end USART1 used
if (__USART_USED & 0x02) { // USART2 used
RCC->APB2ENR |= RCC_APB2ENR_AFIOEN; // enable clock for Alternate Function
AFIO->MAPR &= ~(1 APB2ENR |=RCC_APB2ENR_IOPAEN; // enable clock for GPIOA
GPIOA->CRL &= ~(0xFFULCRL |=(0x0BULCRL |=(0x04ULCRL &= ~(0xFFULCRL |=(0x04ULCRL |=(0x0BULAPB2ENR |= RCC_APB2ENR_AFIOEN; // enable clock for Alternate Function
AFIO->MAPR |= __USART2_REMAP; // set USART2 remap
RCC->APB2ENR |=RCC_APB2ENR_IOPDEN; // enable clock for GPIOD
GPIOD->CRL &= ~(0xFFULCRL |=(0x0BULCRL |=(0x04ULCRL &= ~(0xFFULCRL |=(0x04ULCRL |=(0x0BULAPB1ENR |= RCC_APB1ENR_USART2EN; // enable clock for USART2
USART2->BRR= __USART_BRR(__PCLK1, __USART2_BAUDRATE); // set baudrate
USART2->CR1= __USART2_DATABITS; // set Data bits
USART2->CR2= __USART2_STOPBITS; // set Stop bits
USART2->CR1 |= __USART2_PARITY; // set Parity
USART2->CR3= __USART2_FLOWCTRL; // Set Flow Control
USART2->CR1 |= (USART_CR1_RE | USART_CR1_TE); // RX, TX enable
if (__USART_INTERRUPTS & 0x02) { // interrupts used
USART2->CR1 |= __USART2_CR1;
USART2->CR2 |= __USART2_CR2;
USART2->CR3 |= __USART2_CR3;
NVIC->ISER |= (1 CR1 |= USART_CR1_UE; // USART enable
} // end USART2 used
if (__USART_USED & 0x04) { // USART3 used
RCC->APB2ENR |= RCC_APB2ENR_AFIOEN; // enable clock for Alternate Function
AFIO->MAPR &= ~(3 APB2ENR |=RCC_APB2ENR_IOPBEN; // enable clock for GPIOB
GPIOB->CRH &= ~(0xFFULCRH |=(0x0BULCRH |=(0x04ULCRH &= ~(0xFFULCRH |=(0x04ULCRH |=(0x0BULAPB2ENR |= RCC_APB2ENR_AFIOEN; // enable clock for Alternate Function
AFIO->MAPR |= __USART3_REMAP; // set USART3 remap
RCC->APB2ENR |=RCC_APB2ENR_IOPCEN; // enable clock for GPIOC
GPIOC->CRH &= ~(0xFFULCRH |=(0x0BULCRH |=(0x04ULAPB2ENR |=RCC_APB2ENR_IOPBEN; // enable clock for GPIOB
GPIOB->CRH &= ~(0xFFULCRH |=(0x04ULCRH |=(0x0BULAPB2ENR |= RCC_APB2ENR_AFIOEN; // enable clock for Alternate Function
AFIO->MAPR |= __USART3_REMAP; // set USART3 remap
RCC->APB2ENR |=RCC_APB2ENR_IOPDEN; // enable clock for GPIOD
GPIOD->CRH &= ~(0xFFULCRH |=(0x0BULCRH |=(0x04ULCRH &= ~(0xFFULCRH |=(0x04ULCRH |=(0x0BULAPB1ENR |= RCC_APB1ENR_USART3EN; // enable clock for USART3
USART3->BRR= __USART_BRR(__PCLK1, __USART3_BAUDRATE); // set baudrate
USART3->CR1= __USART3_DATABITS; // set Data bits
USART3->CR2= __USART3_STOPBITS; // set Stop bits
USART3->CR1 |= __USART3_PARITY; // set Parity
USART3->CR3= __USART3_FLOWCTRL; // Set Flow Control
USART3->CR1 |= (USART_CR1_RE | USART_CR1_TE); // RX, TX enable
if (__USART_INTERRUPTS & 0x04) { // interrupts used
USART3->CR1 |= __USART3_CR1;
USART3->CR2 |= __USART3_CR2;
USART3->CR3 |= __USART3_CR3;
NVIC->ISER |= (1 CR1 |= USART_CR1_UE; // USART enable
} // end USART3 used
} // end of stm32_UsartSetup
:D
RE:UART4,UART5【悬赏问答】
你下载有 3.5的固件库吧？在
STM32F10x_StdPeriph_Lib_V3.5.0\Project\STM32F10x_StdPeriph_Examples\USART
这个目录里 就有 串口 4 5 的例子
串口4有DMA支持，
串口5就没有了，只能查询、中断。
例程里面是串口1、2、3的，根据其定义，修改一些关键参数即可。
例如：
#define USART1_DR_Base (uint32_t)(&USART1->DR)
#define USART1_SR_Base (uint32_t)(&USART1->SR)
#define UART5_DR_Base (uint32_t)(&UART5->DR) //(uint32_t)(&USART5->DR)
#define UART5_SR_Base (uint32_t)(&UART5->SR) //(uint32_t)(&USART5->SR)
//串口5 查询发送
void Uart5_SendArray(u16 Leng)
{
u8 i;
for(i=0;i {
/* Send one byte */
USART_SendData(UART5, TxBuffer5);
/* Loop until UART5 DR register is empty */
while(USART_GetFlagStatus(UART5, USART_FLAG_TXE) == RESET)
{
}
}
}
不过 你想要学到东西 还是要把你的问题具体说出来 大家才好帮你解决的啊
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