你作为一名嵌入式工程师,现在需要使用STM32F103C8T6型号的芯片,和低频RFID读卡器做一个基于RFID的低频学生考勤系统,软件编程为利用c语言写一个在每次刷低频卡时用于读取串口数据后利用窗口显示不同数据的代码
时间: 2023-06-25 12:02:13 浏览: 198
好的,下面是基于STM32F103C8T6芯片和低频RFID读卡器的低频学生考勤系统的C语言代码:
```
#include <stm32f10x.h>
#include <stdio.h>
#define USART_RX_BUF_SIZE 128
uint8_t usart_rx_buf[USART_RX_BUF_SIZE] = {0};
uint8_t usart_rx_index = 0;
void USART1_Config(void)
{
RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1 | RCC_APB2Periph_GPIOA, ENABLE);
GPIO_InitTypeDef GPIO_InitStructure;
USART_InitTypeDef USART_InitStructure;
NVIC_InitTypeDef NVIC_InitStructure;
// Configure USART1 Rx (PA10) as input floating
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
GPIO_Init(GPIOA, &GPIO_InitStructure);
// Configure USART1 Tx (PA9) as alternate function push-pull
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
GPIO_Init(GPIOA, &GPIO_InitStructure);
// Configure USART1
USART_InitStructure.USART_BaudRate = 9600;
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(USART1, &USART_InitStructure);
// Enable USART1 RX interrupt
USART_ITConfig(USART1, USART_IT_RXNE, ENABLE);
// Configure and enable the USART1 interrupt
NVIC_InitStructure.NVIC_IRQChannel = USART1_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
// Enable USART1
USART_Cmd(USART1, ENABLE);
}
void USART1_IRQHandler(void)
{
if (USART_GetITStatus(USART1, USART_IT_RXNE) != RESET)
{
usart_rx_buf[usart_rx_index] = USART_ReceiveData(USART1);
usart_rx_index++;
if (usart_rx_index >= USART_RX_BUF_SIZE)
{
usart_rx_index = 0;
}
}
}
int main(void)
{
USART1_Config();
while (1)
{
if (usart_rx_index > 0)
{
// Read RFID data from USART buffer
uint8_t rfid_data[16];
uint8_t rfid_data_index = 0;
uint8_t i;
for (i = 0; i < usart_rx_index; i++)
{
if (usart_rx_buf[i] == 0x02)
{
rfid_data_index = 0;
}
else if (usart_rx_buf[i] == 0x03)
{
// Display RFID data on screen
printf("RFID data: ");
for (i = 0; i < rfid_data_index; i++)
{
printf("%02X ", rfid_data[i]);
}
printf("\n");
rfid_data_index = 0;
}
else
{
rfid_data[rfid_data_index] = usart_rx_buf[i];
rfid_data_index++;
}
}
usart_rx_index = 0;
}
}
}
```
这段代码主要完成了以下几个功能:
1. 初始化USART1配置,设置波特率为9600,使能USART1 RX中断。
2. 在USART1 RX中断中读取串口数据,并将数据存储到usart_rx_buf数组中。
3. 在主循环中,读取usart_rx_buf数组中的数据,并根据读卡器的协议解析出RFID数据。解析出来的RFID数据通过窗口显示在屏幕上。
需要注意的是,这里并没有具体实现窗口显示的代码,需要根据实际情况进行相应的修改。另外,如果需要使用其他型号的低频RFID读卡器,可能需要对代码进行一定的修改。
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