stm32的irda功能，怎么输不出1200bps,38.4k的红外载波信号（72mhz系统主频）

hpei2003 提问时间：2009-3-28 11:23 /

//下面是部分配置
  USART_InitTypeDef USART_InitStructure;

  USART_InitStructure.USART_BaudRate = 1200;
  USART_InitStructure.USART_WordLength = USART_WordLength_9b;
  USART_InitStructure.USART_StopBits = USART_StopBits_1;
  USART_InitStructure.USART_Parity = USART_Parity_Even ;
  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);

  /* Configure the USART3 IrDA mode */
  USART_IrDAConfig(USART3, USART_IrDAMode_Normal);
  USART_IrDACmd(USART3,ENABLE);//

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3个回答

lf8013 回答时间：2010-10-8 22:26:46

RE:stm32的irda功能，怎么输不出1200bps,38.4k的红外载波信号（72mhz系统主频）

顶一下，我也不会

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ryan_mao 回答时间：2011-8-12 10:13:29

RE:stm32的irda功能，怎么输不出1200bps,38.4k的红外载波信号（72mhz系统主频）

#include "IrDA.h"

void init_irda(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
USART_InitTypeDef USART_InitStructure;
   /* Enable GPIO clock */
RCC_APB2PeriphClockCmd(USARTy_GPIO_CLK | RCC_APB2Periph_AFIO, ENABLE);
   /* Enable USARTy clocks */
RCC_APB1PeriphClockCmd(USARTy_CLK, ENABLE);
  /* Enable the USART2 Pins Software Remapping */
  //GPIO_PinRemapConfig(GPIO_Remap_USART2, ENABLE);

  /* Configure USARTy Tx as alternate function push-pull */
  GPIO_InitStructure.GPIO_Pin = USARTy_TxPin;
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
  GPIO_Init(USARTy_GPIO, &GPIO_InitStructure);
  /* Configure USARTy Rx as input floating */
  GPIO_InitStructure.GPIO_Pin = USARTy_RxPin;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
  GPIO_Init(USARTy_GPIO, &GPIO_InitStructure);

USART_InitStructure.USART_BaudRate = 1200;
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;
/* Configure the USARTy */
USART_Init(USARTy, &USART_InitStructure);
/* Enable the USARTy */
USART_Cmd(USARTy, ENABLE);
/* Set the USARTy prescaler */
USART_SetPrescaler(USARTy, 0x1);
/* Configure the USARTy IrDA mode */
USART_IrDAConfig(USARTy, USART_IrDAMode_Normal);
/* Enable the USARTy IrDA mode */
USART_IrDACmd(USARTy, ENABLE);
}

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nieyinghaha 回答时间：2011-10-9 10:18:34

回复:stm32的irda功能，怎么输不出1200bps,38.4k的红外载波信号（72mhz系统主频）

STM的USART3好像只支持波特率为115200的红外收发

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