403 lines
8.8 KiB
TeX
403 lines
8.8 KiB
TeX
\documentclass[全部作业]{subfiles}
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\begin{document}
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\date{2024年11月3日}
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\begin{frame}
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%\maketitle
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\titlepage
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\end{frame}
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\begin{frame}
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\frametitle{目录}
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\tableofcontents
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\end{frame}
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\section{第四次实验}
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\subsection{准备}
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\begin{frame}[fragile]
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将实验三的代码复制一份，并将exp3改名为exp4：
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\vspace{1em}
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\begin{minipage}[H]{0.3\linewidth}
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\begin{minted}[linenos=false]{text}
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exp3
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│ .mxproject
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│ exp3.ioc
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│
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├─Core
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│
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├─Drivers
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│
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└─MDK-ARM
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exp3.uvprojx
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startup_stm32g473xx.s
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\end{minted}
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\end{minipage}
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{\Huge$\longrightarrow$}
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\begin{minipage}[H]{0.3\linewidth}
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\begin{minted}[linenos=false]{text}
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exp4
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│ .mxproject
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│ exp4.ioc
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│
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├─Core
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│
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├─Drivers
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│
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└─MDK-ARM
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exp4.uvprojx
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startup_stm32g473xx.s
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\end{minted}
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\end{minipage}
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\vspace{1em}
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需要改文件夹名、.ioc、.uvprojx这三个地方。
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\end{frame}
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\begin{frame}
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打开.uvprojx文件，修改调试器：
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\includegraphics{imgs/2024-10-29-11-36-58.png}
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\vspace{1em}
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\includegraphics[width=1\linewidth]{imgs/2024-10-29-11-35-44.png}
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\end{frame}
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\begin{frame}
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修改调试设置，把reset and run打勾，就不需要手动按重置按钮了。
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\includegraphics[width=1\linewidth]{imgs/2024-10-29-14-54-11.png}
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\end{frame}
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\subsection{端口修改}
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\begin{frame}
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这样设置端口，点击生成代码。
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\includegraphics[width=1\linewidth]{imgs/2024-11-03-20-18-38.png}
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\end{frame}
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\begin{frame}
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按键：
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（Key1、Key5、Key9和Key13的四个按键的一个端子与JP15的KL0$\sim $KL3相连。）核心板JP1 的 PB0$\sim$PB3 接 底板JP15 的 KL0$\sim$KL3。将JP16上面两个引脚的跳线帽拔下来插到下面两个引脚（即BTN）。
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\includegraphics[width=0.3\linewidth]{imgs/IMG_20241103_194951_1.jpg}
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\includegraphics[width=0.3\linewidth]{imgs/IMG_20241103_195542_1.jpg}
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\includegraphics[width=0.3\linewidth]{imgs/IMG_20241103_195612.jpg}
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\end{frame}
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\begin{frame}
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数码管：
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将 STM32 核心板 JP1 的 PA0$\sim$PA7 与系统的七段数码管电路的 JP19 相连，PA0$\sim$PA7 分别对应于JP19的D0$\sim$D7，用1x4的杜邦线将STM32核心板的JP2的PB0$\sim$PB3 分别连接到系统底板上JP20的A、B、C和OE接口。
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\includegraphics[width=0.23\linewidth]{imgs/IMG_20241103_194712_1.jpg}
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\includegraphics[width=0.23\linewidth]{imgs/IMG_20241103_194932.jpg}
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\includegraphics[width=0.23\linewidth]{imgs/IMG_20241103_144021.jpg}
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\includegraphics[width=0.23\linewidth]{imgs/IMG_20241103_144035.jpg}
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\end{frame}
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\subsection{代码修改}
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\begin{frame}[fragile]
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添加DirectKey.h:
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\begin{multicols}{2}
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\begin{minted}[firstnumber=1]{C}
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#ifndef __DIRECTKEY_H
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#define __DIRECTKEY_H
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#include<stdint.h>
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enum {State0=0, State1, State2};
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#define NoKey 0x0F
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#define KeyPort GPIOC
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#ifdef __cplusplus
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extern "C" {
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#endif
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uint8_t ReadDirectKey(void);
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#ifdef __cplusplus
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}
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#endif
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#endif
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\end{minted}
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\end{multicols}
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\end{frame}
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\begin{frame}[fragile]
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添加DirectKey.c:
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\begin{multicols}{2}
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\begin{minted}{C}
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#include "directkey.h"
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#include "main.h"
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uint8_t ReadDirectKey(void) {
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static uint8_t KeyState = State0;
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static uint8_t KeyOld;
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uint8_t KeyPress;
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uint8_t KeyValue = NoKey;
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KeyPress = KeyPort->IDR & 0x000F; // 读按键
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switch (KeyState) {
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case State0:
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if (KeyPress != NoKey) {
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KeyOld = KeyPress; // 保存原来的键
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KeyState = State1; // 切换状态
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}
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break;
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case State1:
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if (KeyPress == KeyOld) {
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KeyState = State2;
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// KeyValue = KeyOld; // 按下有效
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} else {
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KeyState = State0;
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}
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break;
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case State2:
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if (KeyPress == NoKey) {
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KeyState = State0;
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KeyValue = KeyOld; // 抬起有效
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} else {
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}
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break;
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default:
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break;
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}
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return KeyValue;
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}
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\end{minted}
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\end{multicols}
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\end{frame}
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\begin{frame}[fragile]
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stm32g4xx_it.c:
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\begin{multicols}{2}
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\begin{minted}[firstnumber=182]{C}
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/**
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* @brief This function handles System tick timer.
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*/
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void SysTick_Handler(void)
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{
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/* USER CODE BEGIN SysTick_IRQn 0 */
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/* USER CODE END SysTick_IRQn 0 */
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HAL_IncTick();
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/* USER CODE BEGIN SysTick_IRQn 1 */
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Display();
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if (++sSysTickTimer.mMilSecCount >= 10) {
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sSysTickTimer.mMilSecCount = 0;
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sSysTickTimer.bTenMilSecOk = 1;
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if (++sSysTickTimer.mTimeCount >= 100) {
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sSysTickTimer.mTimeCount = 0;
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sSysTickTimer.bTimeOk = 1;
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}
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}
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/* USER CODE END SysTick_IRQn 1 */
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}
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\end{minted}
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\end{multicols}
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\end{frame}
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\begin{frame}[fragile]
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main.c:
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\begin{multicols}{2}
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\begin{minted}[firstnumber=24]{C}
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/* USER CODE BEGIN Includes */
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#include "variable.h"
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#include "directkey.h"
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/* USER CODE END Includes */
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\end{minted}
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\vspace{1em}
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\begin{minted}[firstnumber=46]{C}
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/* USER CODE BEGIN PV */
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stSysTickTimer sSysTickTimer = {
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0, 0, 0, 0
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};
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uint8_t tempValue;
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uint16_t display_tab[] = {
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0x3f,
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0x06,
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0x5b,
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0x4f,
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0x66,
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0x6d,
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0x7d,
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0x07,
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0x7f,
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0x6f,
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0x77,
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0x7c,
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0x39,
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0x5e,
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0x79,
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0x71
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};
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uint8_t DispBuff[8];
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uint16_t PosSel = 0;
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/* USER CODE END PV */
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\end{minted}
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\end{multicols}
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\end{frame}
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\begin{frame}[fragile]
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main.c:
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\begin{multicols}{2}
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\begin{minted}[firstnumber=79]{C}
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/* Private user code ----------------------------*/
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/* USER CODE BEGIN 0 */
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void DisplayOneLed(uint8_t dat, uint8_t pos, uint8_t dot) {
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uint16_t temp;
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temp = display_tab[dat];
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if (dot)
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temp |= 0x80;
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GPIOA->ODR &= 0xFF00;
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GPIOA->ODR |= temp; // 数据段
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GPIOB->ODR &= 0xFFF0;
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GPIOB->ODR |= pos; // 位选
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}
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void Display(void) {
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static uint8_t mPos = 0;
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DisplayOneLed(DispBuff[mPos], mPos, 0);
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if (++mPos >= 8) mPos = 0;
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}
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void TimeToBuff(void) {
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uint8_t i;
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uint8_t temp;
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temp = DispBuff[0];
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for (int i = 0; i < 7; i++) {
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DispBuff[i] = DispBuff[i + 1];
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}
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DispBuff[7] = temp;
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}
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void DispToBuff(uint8_t val) {
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uint8_t i;
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for (int i = 0; i < 7; i++) {
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DispBuff[i] = DispBuff[i + 1];
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}
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DispBuff[7] = val;
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}
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/* USER CODE END 0 */
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\end{minted}
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\end{multicols}
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\end{frame}
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\begin{frame}[fragile]
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main.c:
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\begin{multicols}{2}
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\begin{minted}[firstnumber=119]{C}
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/**
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* @brief The application entry point.
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* @retval int
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*/
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int main(void)
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{
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/* USER CODE BEGIN 1 */
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uint8_t KeyValue = 0;
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/* USER CODE END 1 */
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/* MCU Configuration--------------------------*/
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/* Reset of all peripherals, Initializes the Flash interface and the Systick. */
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HAL_Init();
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/* USER CODE BEGIN Init */
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/* USER CODE END Init */
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/* Configure the system clock */
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SystemClock_Config();
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/* USER CODE BEGIN SysInit */
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/* USER CODE END SysInit */
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/* Initialize all configured peripherals */
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MX_GPIO_Init();
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/* USER CODE BEGIN 2 */
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// FlashLeds_GPIO_Port->ODR &= 0xff01;
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for (int i = 0; i < 8; i++) {
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DispBuff[i] = i;
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}
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/* USER CODE END 2 */
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\end{minted}
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\end{multicols}
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\end{frame}
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\begin{frame}[fragile]
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main.c:
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\begin{multicols}{2}
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\begin{minted}[firstnumber=last]{C}
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/* Infinite loop */
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/* USER CODE BEGIN WHILE */
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while (1)
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{
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/* USER CODE END WHILE */
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/* USER CODE BEGIN 3 */
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if (sSysTickTimer.bTenMilSecOk) {
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sSysTickTimer.bTenMilSecOk = 0;
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KeyValue = ReadDirectKey();
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if (KeyValue != NoKey) {
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switch (KeyValue)
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{
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case 0x0E: // K1
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tempValue = 1;
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break;
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case 0x0D: // K5
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tempValue = 2;
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break;
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case 0x0B: // K9
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tempValue = 3;
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break;
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case 0x07: // K13
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tempValue = 4;
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break;
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default:
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break;
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}
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DispToBuff(tempValue);
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}
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}
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if (sSysTickTimer.bTimeOk) {
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sSysTickTimer.bTimeOk = 0;
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// TimeToBuff();
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HAL_GPIO_TogglePin(LED_GPIO_Port, LED_Pin);
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}
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}
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/* USER CODE END 3 */
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}
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\end{minted}
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\end{multicols}
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\end{frame}
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\subsection{实验结果}
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\begin{frame}
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数码管初始显示01234567，按下K1、K5、K9、K13并抬起时，数码管左移一位，并在右侧添加1、2、3、4。因此记K1、K5、K9、K13分别为1、2、3、4。例如，逐个按下1433223，数码管显示的数字变化为：
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$$
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01234567 \to 12345671 \to 23456714 \to \cdots\to 71433223
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$$
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\includegraphics[width=0.45\linewidth]{imgs/IMG_20241103_162322.jpg}
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\includegraphics[width=0.45\linewidth]{imgs/IMG_20241103_213225.jpg}
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完整视频可以查看：\url{https://gitea.librastalker.top/423A35C7/STM32CubeMX-Keil_uVision5}
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\end{frame}
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\end{document} |