自行车码表
实验环境windows。
其实只是想起我的博客还一点都没写，就想把实验过程写下来，可以给写报告的我回忆。毕竟我只是一条金鱼。
配环境
安装STM32CubeMX，改安装地址，下一步下一步，over. 改软件安装地址的话最好是英文路径，软件装多了的觉悟┗|｀O′|┛
打开软件，长这样。新建工程。
选芯片
新建的Project是不能立即用的，还差一些依赖。在目睹了室友用自带的安装软件崩盘了不知道多少次，我决定本地安装。
点击Help->Install new libraries -> 左下角 From Local... 把下载的包和补丁导入即可。
本地真的炒鸡方便的，流下了开心的泪水。
点击Project -> Setting，填项目名称、位置和工具。选MDK-ARM V5，这个就是要装Keil了。装Keil比较方便，按步骤就好。
然后，点击代码生成按钮。
生成着生成着就会跳出
那就open project吧 跳转keil的界面。 在你看到项目的基础文件之前 会要你安装个依赖包。还是在线安装，很慢还会跳出奇奇怪怪的提示。反正可以下完，下完之后就会出现一系列基础文件，可以修改这些文件来做我们的实验。
为了下载，需要改几个设置。 在keil上点击Flash ->Configuration Flash Tools, 把Use Debug Driver前面的勾去掉。
再看 lab3旁边的魔法棒，点击进入，根据fm给的教程走，可以看到下面这张图。
记住F7模块编译，F8下载到板子。
然后就开始做实验吧
实验步骤
连接图按Lab3指导的来。还是有点不一样的，用了两个usb，有改动的连接是看了李明哲的博客。所以经常翻翻同学的博客还是很有用的，特别是几个会提前做作业的大神们。万分感激。
连线图如下：
其中，ST-LINK四根线3.3V GND SWDIO SWCLK分别对应STM32上3.3V GND DIO DCLK. PA9 PA10分别连另一个USB的RXD TXD. 然后STM32的GND和面包板相连。
具体实验步骤参考：
http://www.jianshu.com/p/c43f0bc2709c
最终版的main.c如下
******************************************************************************
* File Name : main.c
* Description : Main program body
******************************************************************************
/* Includes ------------------------------------------------------------------*/
#include "stm32f1xx_hal.h"
/* USER CODE BEGIN Includes */
/* USER CODE END Includes */
/* Private variables ---------------------------------------------------------*/
UART_HandleTypeDef huart1;
/* USER CODE BEGIN PV */
/* Private variables ---------------------------------------------------------*/
/* USER CODE END PV */
/* Private function prototypes -----------------------------------------------*/
void SystemClock_Config(void);
static void MX_GPIO_Init(void);
static void MX_USART1_UART_Init(void);
/* USER CODE BEGIN PFP */
/* Private function prototypes -----------------------------------------------*/
/* USER CODE END PFP */
/* USER CODE BEGIN 0 */
UART_HandleTypeDef UartHandle;
void UART0_Init(UART_HandleTypeDef* UartHandle){
UartHandle->Instance = USART1;
UartHandle->Init.BaudRate = 9600;
UartHandle->Init.WordLength = UART_WORDLENGTH_8B;
UartHandle->Init.StopBits = UART_STOPBITS_1;
UartHandle->Init.Parity = UART_PARITY_NONE;
UartHandle->Init.HwFlowCtl = UART_HWCONTROL_NONE;
UartHandle->Init.Mode = UART_MODE_TX_RX;
HAL_UART_Init(UartHandle);
}
#define MAX_BITCOUNT 0xff
#define CHECK_DELAY 10
#define PERIMETER 2
void anti_jitter(int *bitcount, int state){
*bitcount <<= 1;
*bitcount &= MAX_BITCOUNT;
*bitcount += state & 1;
}
int PAcount=0, PAflag=0,mode = 0;
void HAL_GPIO_EXTI_Callback(uint16_t GPIO_Pin){
switch (GPIO_Pin){
case GPIO_PIN_11:
HAL_UART_Transmit(&UartHandle, (uint8_t*)"PA11 invokes\r\n", 14, 100);
mode=1-mode;
break;
case GPIO_PIN_12:
PAcount++;
break;
}
}
//Timer Initialization
TIM_HandleTypeDef TIM_Handle;
TIM_ClockConfigTypeDef sClockSourceConfig;
TIM_MasterConfigTypeDef sMasterConfig;
int TIMflag = 0, TIMcount = 0;
void TIM_Init(){
TIM_Handle.Instance = TIM3;
TIM_Handle.Init.Prescaler = 8000;
TIM_Handle.Init.CounterMode = TIM_COUNTERMODE_UP;
TIM_Handle.Init.Period = 199;
TIM_Handle.Init.ClockDivision = TIM_CLOCKDIVISION_DIV1;
HAL_TIM_Base_Init(&TIM_Handle);
sClockSourceConfig.ClockSource = TIM_CLOCKSOURCE_INTERNAL;
HAL_TIM_ConfigClockSource(&TIM_Handle, &sClockSourceConfig);
sMasterConfig.MasterOutputTrigger = TIM_TRGO_RESET;
sMasterConfig.MasterSlaveMode = TIM_MASTERSLAVEMODE_DISABLE;
HAL_TIMEx_MasterConfigSynchronization(&TIM_Handle, &sMasterConfig);
}
void TIM3_IRQHandler(void){
HAL_TIM_IRQHandler(&TIM_Handle);
}
int Route[5];
void HAL_TIM_PeriodElapsedCallback(TIM_HandleTypeDef *htim){
TIMcount++;
int cnt = 0;
char sentence[64];
int current = (TIMcount - 1) % 5;
int previous = (current + 1) % 5;
int distance = PAcount * PERIMETER;
Route[current] = distance;
if(mode == 0){
cnt = sprintf(sentence, "Distance: %d\r\n", distance);
}
else{
float speed = Route[current] - Route[previous];
cnt = sprintf(sentence, "Speed: %f\r\n", speed / 1.0);
}
HAL_UART_Transmit(&UartHandle, (uint8_t*)sentence, cnt, 100);
}
/* USER CODE END 0 */
int main(void)
{
/* USER CODE BEGIN 1 */
/* USER CODE END 1 */
/* MCU Configuration----------------------------------------------------------*/
/* Reset of all peripherals, Initializes the Flash interface and the Systick. */
HAL_Init();
/* Configure the system clock */
SystemClock_Config();
/* Initialize all configured peripherals */
MX_GPIO_Init();
MX_USART1_UART_Init();
/* USER CODE BEGIN 2 */
UART0_Init(&UartHandle);
//HAL_UART_Transmit(&UartHandle, (uint8_t*)"Hello", 5, 100);
TIM_Init();
HAL_TIM_Base_Start_IT(&TIM_Handle);
GPIO_InitTypeDef GPIO_InitStruct;
__GPIOA_CLK_ENABLE();
GPIO_InitStruct.Pin = GPIO_PIN_11;
GPIO_InitStruct.Mode = GPIO_MODE_IT_FALLING;
GPIO_InitStruct.Pull = GPIO_PULLUP;
GPIO_InitStruct.Speed = GPIO_SPEED_LOW;
HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
GPIO_InitStruct.Pin = GPIO_PIN_12;
GPIO_InitStruct.Mode = GPIO_MODE_IT_FALLING;
GPIO_InitStruct.Pull = GPIO_PULLUP;
GPIO_InitStruct.Speed = GPIO_SPEED_LOW;
HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
HAL_NVIC_SetPriority(EXTI15_10_IRQn,0,0);
HAL_NVIC_EnableIRQ(EXTI15_10_IRQn);
/* USER CODE END 2 */
/* Infinite loop */
/* USER CODE BEGIN WHILE */
HAL_SuspendTick();
HAL_PWR_EnterSLEEPMode(PWR_MAINREGULATOR_ON, PWR_SLEEPENTRY_WFI);
HAL_PWR_EnableSleepOnExit();
while (1)
{
}
/* USER CODE END 3 */
}
/** System Clock Configuration
*/
void SystemClock_Config(void)
{
RCC_OscInitTypeDef RCC_OscInitStruct;
RCC_ClkInitTypeDef RCC_ClkInitStruct;
RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSI;
RCC_OscInitStruct.HSIState = RCC_HSI_ON;
RCC_OscInitStruct.HSICalibrationValue = 16;
RCC_OscInitStruct.PLL.PLLState = RCC_PLL_NONE;
HAL_RCC_OscConfig(&RCC_OscInitStruct);
RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK|RCC_CLOCKTYPE_SYSCLK
|RCC_CLOCKTYPE_PCLK1|RCC_CLOCKTYPE_PCLK2;
RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_HSI;
RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV1;
RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1;
HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_0);
HAL_SYSTICK_Config(HAL_RCC_GetHCLKFreq()/1000);
HAL_SYSTICK_CLKSourceConfig(SYSTICK_CLKSOURCE_HCLK);
/* SysTick_IRQn interrupt configuration */
HAL_NVIC_SetPriority(SysTick_IRQn, 0, 0);
}
/* USART1 init function */
void MX_USART1_UART_Init(void)
{
huart1.Instance = USART1;
huart1.Init.BaudRate = 115200;
huart1.Init.WordLength = UART_WORDLENGTH_8B;
huart1.Init.StopBits = UART_STOPBITS_1;
huart1.Init.Parity = UART_PARITY_NONE;
huart1.Init.Mode = UART_MODE_TX_RX;
huart1.Init.HwFlowCtl = UART_HWCONTROL_NONE;
huart1.Init.OverSampling = UART_OVERSAMPLING_16;
HAL_HalfDuplex_Init(&huart1);
}
/** Configure pins as
* Analog
* Input
* Output
* EVENT_OUT
* EXTI
*/
void MX_GPIO_Init(void)
{
GPIO_InitTypeDef GPIO_InitStruct;
/* GPIO Ports Clock Enable */
__HAL_RCC_GPIOA_CLK_ENABLE();
/*Configure GPIO pins : PA11 PA12 */
GPIO_InitStruct.Pin = GPIO_PIN_11|GPIO_PIN_12;
GPIO_InitStruct.Mode = GPIO_MODE_INPUT;
GPIO_InitStruct.Pull = GPIO_NOPULL;
HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
}
/* USER CODE BEGIN 4 */
/* USER CODE END 4 */
#ifdef USE_FULL_ASSERT
/**
* @brief Reports the name of the source file and the source line number
* where the assert_param error has occurred.
* @param file: pointer to the source file name
* @param line: assert_param error line source number
* @retval None
*/
void assert_failed(uint8_t* file, uint32_t line)
{
/* USER CODE BEGIN 6 */
/* User can add his own implementation to report the file name and line number,
ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */
/* USER CODE END 6 */
}
#endif
/**
* @}
*/
/**
* @}
*/
/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
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