我用的板子是STM3210X-128K-EVAL .IAR 4.41A. 看了TIM的例子6,想用这个例子和USART的例子1综合起来,通过串口发送接收到的PWM到PC上面显示出来.可是显示出来的脉冲是乱码 想请教一下看看是不是那里有问题,或是串口的程序应该怎么样写.麻烦了.我在stm32f10x_it.c里面的void TIM2_IRQHandler(void)
{
/* Clear TIM2 Capture compare interrupt pending bit */
TIM_ClearITPendingBit(TIM2, TIM_IT_CC2);
/* Get the Input Capture value */
IC2_Value = TIM_GetCapture2(TIM2);
if(IC2_Value != 0)
{
/* Duty cycle computation */
Duty_Cycle = (TIM_GetCapture1(TIM2) * 100) / IC2_Value;
/* Frequency computation */
Frequency = 72000000 / IC2_Value;
}
else
{
Duty_Cycle = 0;
Frequency = 0;
}
USART_SendData(USART2, Frequency);
while(USART_GetFlagStatus(USART2, USART_FLAG_TXE) == RESET)
{
}
}
填加了发送函数,然后PC上面接收到的脉冲显示的是乱码.
程序如下:
/* Includes ------------------------------------------------------------------*/
#include "stm32f10x_lib.h"
/* Private typedef -----------------------------------------------------------*/
/* Private define ------------------------------------------------------------*/
#define TxBufferSize (countof(TxBuffer) - 1)
#define RxBufferSize 0xFF
/* Private macro -------------------------------------------------------------*/
#define countof(a) (sizeof(a) / sizeof(*(a)))
/* Private variables ---------------------------------------------------------*/
TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
TIM_ICInitTypeDef TIM_ICInitStructure;
ErrorStatus HSEStartUpStatus;
USART_InitTypeDef USART_InitStructure;
u8 TxBuffer[] ="AAAAAAAAAAAAA\r" ;//"\n\rUSART Example 1: USART - Hyperterminal ardware flow control\n\r";
u8 RxBuffer[RxBufferSize];
u8 NbrOfDataToTransfer = TxBufferSize;
u8 TxCounter = 0;
u8 RxCounter = 0;
ErrorStatus HSEStartUpStatus;
/* Private function prototypes -----------------------------------------------*/
void RCC_Configuration(void);
void GPIO_Configuration(void);
void NVIC_Configuration(void);
/* Private functions ---------------------------------------------------------*/
/*******************************************************************************
* Function Name : main
* Description : Main program
* Input : None
* Output : None
* Return : None
*******************************************************************************/
int main(void)
{
#ifdef DEBUG
debug();
#endif
/* System Clocks Configuration */
RCC_Configuration();
/* NVIC configuration */
NVIC_Configuration();
/* Configure the GPIO ports */
GPIO_Configuration();
TIM_ICInitStructure.TIM_ICMode = TIM_ICMode_PWMI; /*TIM使用输入PWM模式*/
TIM_ICInitStructure.TIM_Channel = TIM_Channel_2; /*使用TIM2通道*/
TIM_ICInitStructure.TIM_ICPolarity = TIM_ICPolarity_Rising; /*TIM输入捕获上升沿*/
TIM_ICInitStructure.TIM_ICSelection = TIM_ICSelection_DirectTI; /*TIM输入2，3或4选择对应地与IC1或IC2或IC3或IC4相连*/
TIM_ICInitStructure.TIM_ICPrescaler = TIM_ICPSC_DIV1; /*TIM捕获在捕获输入上每探测到一个边沿执行一次*/
TIM_ICInitStructure.TIM_ICFilter = 0x0; /*选择输入比较滤波器 ，取值在0x0到0xF之间*/
TIM_ICInit(TIM2, &TIM_ICInitStructure);
/* 选择TIM1输入触发源 TIM经滤波定时器输入2 */
TIM_SelectInputTrigger(TIM2, TIM_TS_TI2FP2);
/* Select the slave Mode: Reset Mode */
TIM_SelectSlaveMode(TIM2, TIM_SlaveMode_Reset);
/* TIM主/从模式使能 */
TIM_SelectMasterSlaveMode(TIM2, TIM_MasterSlaveMode_Enable);
/* TIM enable counter */
TIM_Cmd(TIM2, ENABLE);
/* 使能TIM捕获/比较2中断源 */
TIM_ITConfig(TIM2, TIM_IT_CC2, ENABLE);
USART_InitStructure.USART_BaudRate = 115200;
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_HardwareFlowControl_RTS_CTS;
USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;
USART_InitStructure.USART_Clock = USART_Clock_Disable;
USART_InitStructure.USART_CPOL = USART_CPOL_Low;
USART_InitStructure.USART_CPHA = USART_CPHA_2Edge;
USART_InitStructure.USART_LastBit = USART_LastBit_Disable;
USART_Init(USART2, &USART_InitStructure);
/* Enable the USART2 */
USART_Cmd(USART2, ENABLE);
/* Communication hyperterminal-USART2 using hardware flow control -------------*/
/* Send a buffer from USART to hyperterminal */
while(NbrOfDataToTransfer--)
{
USART_SendData(USART2, TxBuffer[TxCounter++]);
while(USART_GetFlagStatus(USART2, USART_FLAG_TXE) == RESET)
{
}
}
/* Receive a string (Max RxBufferSize bytes) from the Hyperterminal ended by '\r' (Enter key) */
do
{
if((USART_GetFlagStatus(USART2, USART_FLAG_RXNE) != RESET)&&(RxCounter < RxBufferSize))
{
RxBuffer[RxCounter] = USART_ReceiveData(USART2);
USART_SendData(USART2, RxBuffer[RxCounter++]);
}
}while((RxBuffer[RxCounter - 1] != '\r')&&(RxCounter != RxBufferSize));
while (1)
{
}
}
/*******************************************************************************
* Function Name : RCC_Configuration
* Description : Configures the different system clocks.
* Input : None
* Output : None
* Return : None
*******************************************************************************/
void RCC_Configuration(void)
{
/* RCC system reset(for debug purpose) */
RCC_DeInit();
/* Enable HSE */
RCC_HSEConfig(RCC_HSE_ON);
/* Wait till HSE is ready */
HSEStartUpStatus = RCC_WaitForHSEStartUp();
if(HSEStartUpStatus == SUCCESS)
{
/* Enable Prefetch Buffer */
FLASH_PrefetchBufferCmd(FLASH_PrefetchBuffer_Enable);
/* Flash 2 wait state */
FLASH_SetLatency(FLASH_Latency_2);
/* HCLK = SYSCLK */
RCC_HCLKConfig(RCC_SYSCLK_Div1);
/* PCLK2 = HCLK */
RCC_PCLK2Config(RCC_HCLK_Div1);
/* PCLK1 = HCLK/2 */
RCC_PCLK1Config(RCC_HCLK_Div2);
/* PLLCLK = 8MHz * 9 = 72 MHz */
RCC_PLLConfig(RCC_PLLSource_HSE_Div1, RCC_PLLMul_9);
/* Enable PLL */
RCC_PLLCmd(ENABLE);
/* Wait till PLL is ready */
while(RCC_GetFlagStatus(RCC_FLAG_PLLRDY) == RESET)
{
}
/* Select PLL as system clock source */
RCC_SYSCLKConfig(RCC_SYSCLKSource_PLLCLK);
/* Wait till PLL is used as system clock source */
while(RCC_GetSYSCLKSource() != 0x08)
{
}
}
/* TIM2 clock enable */
RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2 | RCC_APB1Periph_USART2, ENABLE);
/* GPIOA clock enable */
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA | RCC_APB2Periph_GPIOD | RCC_APB2Periph_AFIO, ENABLE);
}
/*******************************************************************************
* Function Name : GPIO_Configuration
* Description : Configure the GPIOD Pins.
* Input : None
* Output : None
* Return : None
*******************************************************************************/
void GPIO_Configuration(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
/* GPIOA Configuration */
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_1;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOA, &GPIO_InitStructure);
/* Enable the USART2 Pins Software Remapping */
GPIO_PinRemapConfig(GPIO_Remap_USART2, ENABLE);
/* Configure USART2 RTS (PD.04) and USART2 Tx (PD.05) as alternate function push-pull */
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_5; //| GPIO_Pin_5;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
GPIO_Init(GPIOD, &GPIO_InitStructure);
/* Configure USART2 CTS (PD.03) and USART2 Rx (PD.06) as input floating */
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6; //| GPIO_Pin_6;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
GPIO_Init(GPIOD, &GPIO_InitStructure);
}
/*******************************************************************************
* Function Name : NVIC_Configuration
* Description : Configure the nested vectored interrupt controller.
* Input : None
* Output : None
* Return : None
*******************************************************************************/
void NVIC_Configuration(void)
{
NVIC_InitTypeDef NVIC_InitStructure;
#ifdef VECT_TAB_RAM
/* Set the Vector Table base location at 0x20000000 */
NVIC_SetVectorTable(NVIC_VectTab_RAM, 0x0);
#else /* VECT_TAB_FLASH */
/* Set the Vector Table base location at 0x08000000 */
NVIC_SetVectorTable(NVIC_VectTab_FLASH, 0x0);
#endif
/* Enable the TIM2 global Interrupt */
NVIC_InitStructure.NVIC_IRQChannel = TIM2_IRQChannel; /*TIM2全局中断*/
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0; /*先占优先级0位*/
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1; /*从优先级1位*/
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
}
#ifdef DEBUG |
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