STM32F407配置HC-SR04代码,要求用串口通信输出测量结果
时间: 2024-05-19 18:14:57 浏览: 27
你好!感谢你的提问。以下是关于STM32F407配置HC-SR04代码的建议:
为了使用STM32F407与HC-SR04测距模块,您需要完成以下步骤:
1. 首先,需要将STM32F407开发板与HC-SR04模块连接起来,具体连接方式可以查看HC-SR04模块的数据手册。
2. 接着,您需要在STM32F407开发板上配置USART串口通信模块,用于与电脑进行通信。具体配置方法可以参考该开发板的相关手册。
3. 在代码中,您需要使用外部中断和定时器计数器两种方式来实现测距功能。其中,外部中断用于接收HC-SR04模块发送的超声波信号,定时器计数器用于计算信号的时长。
4. 最后,您可以通过串口通信将测量结果输出到电脑上。需要注意的是,由于串口通信涉及到一些参数配置,您需要仔细阅读STM32F407开发板的手册,并根据实际需要进行相关设置。
希望以上建议能对您有所帮助。如果您还有其他问题,欢迎随时向我提问。谢谢!
相关问题
写出STM32F407配置HC-SR04代码,要求用串口通信输出测量结果
好的,以下是代码实现:
#include "stm32f4xx.h"
#include "stdio.h"
#define TRIG_Pin GPIO_Pin_13
#define TRIG_Port GPIOE
#define ECHO_Pin GPIO_Pin_14
#define ECHO_Port GPIOE
uint32_t time;
void Delay_us(uint32_t us)
{
uint32_t ticks;
ticks = us * (SystemCoreClock / 1000000U);
while (ticks--);
}
void TIM5_Configuration(void)
{
TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM5, ENABLE);
TIM_TimeBaseStructure.TIM_Prescaler = (SystemCoreClock / 1000000U) - 1;
TIM_TimeBaseStructure.TIM_Period = 0xFFFFFFFF;
TIM_TimeBaseStructure.TIM_ClockDivision = TIM_CKD_DIV1;
TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
TIM_TimeBaseInit(TIM5, &TIM_TimeBaseStructure);
}
void HC_SR04_Configuration(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOE, ENABLE);
GPIO_InitStructure.GPIO_Pin = TRIG_Pin;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_OUT;
GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_100MHz;
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;
GPIO_Init(TRIG_Port, &GPIO_InitStructure);
GPIO_InitStructure.GPIO_Pin = ECHO_Pin;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN;
GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_100MHz;
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;
GPIO_Init(ECHO_Port, &GPIO_InitStructure);
}
float HC_SR04_Measure(void)
{
float distance;
uint32_t start_time = 0, stop_time = 0, measure_time = 0, over_time = 0;
TRIG_Port -> BSRRH = TRIG_Pin;
Delay_us(2);
TRIG_Port -> BSRRL = TRIG_Pin;
while ((ECHO_Port -> IDR & ECHO_Pin) == RESET);
start_time = TIM5 -> CNT;
while ((ECHO_Port -> IDR & ECHO_Pin) != RESET);
stop_time = TIM5 -> CNT;
measure_time = stop_time - start_time;
if (measure_time >= 58000)
{
over_time = 1;
}
distance = (float)measure_time / 58.0;
if (over_time)
{
distance = -1.0;
}
return distance;
}
int main(void)
{
char buff[32] = {0};
float distance = 0.0;
USART1_Configuration();
TIM5_Configuration();
HC_SR04_Configuration();
while(1)
{
distance = HC_SR04_Measure();
if (distance < 0.0)
{
sprintf(buff, "Measurement timeout!\r\n");
}
else
{
sprintf(buff, "Distance: %.2fcm\r\n", distance);
}
USART_puts(USART1, buff);
Delay_us(500000);
}
}
STM32配置HC-SR04的代码,要求用串口输出结果。
您好!感谢您的提问。以下是包含HC-SR04的STM32的基本代码,其中使用串口输出结果:
#include "stm32f10x.h"
#include <stdio.h>
#define TRIG_PIN GPIO_Pin_0
#define ECHO_PIN GPIO_Pin_1
#define TRIG_PORT GPIOA
#define ECHO_PORT GPIOA
void delay_us(uint32_t us) {
us *= 100;
while (us--) {
__NOP();
}
}
float measure_distance() {
float distance;
uint32_t pulse_width;
GPIO_ResetBits(TRIG_PORT, TRIG_PIN);
delay_us(2);
GPIO_SetBits(TRIG_PORT, TRIG_PIN);
delay_us(10);
GPIO_ResetBits(TRIG_PORT, TRIG_PIN);
while (GPIO_ReadInputDataBit(ECHO_PORT, ECHO_PIN) != SET)
;
uint32_t start_time = TIM_GetCounter(TIM2);
while (GPIO_ReadInputDataBit(ECHO_PORT, ECHO_PIN) != RESET)
;
pulse_width = TIM_GetCounter(TIM2) - start_time;
distance = pulse_width * 0.017;
return distance;
}
int main() {
// Initialize system
SystemInit();
// Enable clocks
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA | RCC_APB2Periph_AFIO, ENABLE);
RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2, ENABLE);
RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1, ENABLE);
// Initialize GPIOs
GPIO_InitTypeDef GPIO_InitStructure;
GPIO_StructInit(&GPIO_InitStructure);
GPIO_InitStructure.GPIO_Pin = TRIG_PIN;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(TRIG_PORT, &GPIO_InitStructure);
GPIO_InitStructure.GPIO_Pin = ECHO_PIN;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(ECHO_PORT, &GPIO_InitStructure);
// Initialize timer
TIM_TimeBaseInitTypeDef TIM_InitStructure;
TIM_StructInit(&TIM_InitStructure);
TIM_InitStructure.TIM_Prescaler = SystemCoreClock / 1000000;
TIM_InitStructure.TIM_Period = 0xFFFFFFFF;
TIM_TimeBaseInit(TIM2, &TIM_InitStructure);
// Initialize USART
USART_InitTypeDef USART_InitStructure;
USART_StructInit(&USART_InitStructure);
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_Init(USART1, &USART_InitStructure);
// Enable USART
USART_Cmd(USART1, ENABLE);
while (1) {
float distance = measure_distance();
char buffer[50];
sprintf(buffer, "Distance: %f cm\n", distance);
printf(buffer);
}
}
希望这可以帮助到您!