用stm32f407实现从lcd屏幕输入账户名和密码后进入显示页面并进行电压采集
时间: 2023-06-26 12:06:33 浏览: 72
这个任务可以分为以下几个步骤实现:
1. 连接LCD屏幕和STM32F407开发板。
2. 在STM32F407开发板上配置串口或者键盘输入。
3. 编写代码实现在LCD屏幕上显示账户名和密码的输入界面,并且能够接受用户的输入。
4. 当用户输入正确的账户名和密码后,进入电压采集页面。
5. 在电压采集页面上,通过ADC模块采集电压信号,并且将采集的电压值显示在LCD屏幕上。
下面是一个简单的示例代码,可以帮助你入门:
```c
#include "stm32f4xx.h"
#include "stm32f4xx_gpio.h"
#include "stm32f4xx_rcc.h"
#include "stm32f4xx_adc.h"
#include "stm32f4xx_tim.h"
#include "stm32f4xx_usart.h"
#include "stdio.h"
#define ADC1_DR_ADDRESS ((uint32_t)0x4001204C)
void GPIO_Configuration(void);
void ADC_Configuration(void);
void USART_Configuration(void);
void TIM_Configuration(void);
uint16_t ADC1ConvertedValue = 0;
char buffer[20];
int main(void)
{
GPIO_Configuration();
ADC_Configuration();
USART_Configuration();
TIM_Configuration();
while (1)
{
// 读取 ADC1 转换结果寄存器
ADC1ConvertedValue = *(uint16_t*)ADC1_DR_ADDRESS;
// 将 ADC 转换结果转换为电压值
float voltage = (float)ADC1ConvertedValue / 4096.0f * 3.3f;
// 将电压值转换为字符串
sprintf(buffer, "Voltage: %.2fV\r\n", voltage);
// 通过 USART 发送电压值字符串
for (int i = 0; i < strlen(buffer); i++)
{
while (USART_GetFlagStatus(USART1, USART_FLAG_TXE) == RESET);
USART_SendData(USART1, buffer[i]);
}
// 等待 1 秒钟
TIM_Cmd(TIM2, ENABLE);
while (TIM_GetFlagStatus(TIM2, TIM_FLAG_Update) == RESET);
TIM_Cmd(TIM2, DISABLE);
TIM_ClearFlag(TIM2, TIM_FLAG_Update);
}
}
void GPIO_Configuration(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
// 使能 GPIOA 时钟
RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOA, ENABLE);
// 配置 PA1 为模拟输入
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_1;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AN;
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;
GPIO_Init(GPIOA, &GPIO_InitStructure);
}
void ADC_Configuration(void)
{
ADC_InitTypeDef ADC_InitStructure;
ADC_CommonInitTypeDef ADC_CommonInitStructure;
// 使能 ADC1 时钟
RCC_APB2PeriphClockCmd(RCC_APB2Periph_ADC1, ENABLE);
// ADC1 配置
ADC_InitStructure.ADC_Resolution = ADC_Resolution_12b;
ADC_InitStructure.ADC_ScanConvMode = DISABLE;
ADC_InitStructure.ADC_ContinuousConvMode = ENABLE;
ADC_InitStructure.ADC_ExternalTrigConvEdge = ADC_ExternalTrigConvEdge_None;
ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right;
ADC_InitStructure.ADC_NbrOfConversion = 1;
ADC_Init(ADC1, &ADC_InitStructure);
// ADC1 通用配置
ADC_CommonInitStructure.ADC_Mode = ADC_Mode_Independent;
ADC_CommonInitStructure.ADC_Prescaler = ADC_Prescaler_Div2;
ADC_CommonInitStructure.ADC_DMAAccessMode = ADC_DMAAccessMode_Disabled;
ADC_CommonInitStructure.ADC_TwoSamplingDelay = ADC_TwoSamplingDelay_5Cycles;
ADC_CommonInit(&ADC_CommonInitStructure);
// 配置 ADC1 通道 1
ADC_RegularChannelConfig(ADC1, ADC_Channel_1, 1, ADC_SampleTime_15Cycles);
// 开启 ADC1
ADC_Cmd(ADC1, ENABLE);
// 等待 ADC1 启动
ADC_SoftwareStartConv(ADC1);
}
void USART_Configuration(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
USART_InitTypeDef USART_InitStructure;
// 使能 GPIOA 和 USART1 时钟
RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOA, ENABLE);
RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1, ENABLE);
// 配置 PA9 为 USART1_TX
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;
GPIO_Init(GPIOA, &GPIO_InitStructure);
// 配置 USART1
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_InitStructure.USART_Mode = USART_Mode_Tx;
USART_Init(USART1, &USART_InitStructure);
// 使能 USART1
USART_Cmd(USART1, ENABLE);
}
void TIM_Configuration(void)
{
TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
// 使能 TIM2 时钟
RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2, ENABLE);
// TIM2 配置
TIM_TimeBaseStructure.TIM_Period = 4999;
TIM_TimeBaseStructure.TIM_Prescaler = 8399;
TIM_TimeBaseStructure.TIM_ClockDivision = TIM_CKD_DIV1;
TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
TIM_TimeBaseInit(TIM2, &TIM_TimeBaseStructure);
// 启动 TIM2
TIM_Cmd(TIM2, ENABLE);
}
```
注意:以上代码只是一个示例,不能直接复制到你的项目中。你需要根据自己的需求进行修改和完善。