PRi——lab3部分代碼

自行車碼錶代碼清單

包括main.c和stm32f1xx_hal_msp.c

1、main.c

#define MAX_BITCOUNT 0xff
#define CHECK_DELAY 10
#define PERIMETER 3.14

UART_HandleTypeDef UartHandle;
TIM_HandleTypeDef TIM_Handle;
int cnt;
int total, bitcount, dispMode = 0;
int PA12count = 0, PA12flag = 0;
int TIMflag = 0, TIMcount = 0;
float RouteTick[10];
char str[64];
int send = 0;

void UART0_Init(){
    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);
}

void NVIC_Init(){
    HAL_NVIC_SetPriority(EXTI15_10_IRQn,0,0);
    HAL_NVIC_EnableIRQ(EXTI15_10_IRQn);
    HAL_NVIC_SetPriority(TIM3_IRQn, 0, 0);
    HAL_NVIC_EnableIRQ(TIM3_IRQn);
}

void anti_jitter(int *bitcount, int state){
    *bitcount <<= 1;
    *bitcount &= MAX_BITCOUNT;
    *bitcount += state & 1;
}

void HAL_GPIO_EXTI_Callback(uint16_t GPIO_Pin){
    if (GPIO_Pin == GPIO_PIN_12){
        PA12flag = 1;
        PA12count ++;
    }else{
        UNUSED(GPIO_Pin);
    }
}

void EXTI15_10_IRQHandler(void){
    HAL_GPIO_EXTI_IRQHandler(GPIO_PIN_12);
}

void TIM3_IRQHandler(void){
    HAL_TIM_IRQHandler(&TIM_Handle);
}

void TIM_Init(){
    TIM_Handle.Instance = TIM3;
    TIM_Handle.Init.Prescaler = 8000;
    TIM_Handle.Init.CounterMode = TIM_COUNTERMODE_UP;
    TIM_Handle.Init.Period = 199;
    HAL_TIM_Base_Init(&TIM_Handle);
    HAL_TIM_Base_Start_IT(&TIM_Handle);
}

void HAL_TIM_PeriodElapsedCallback(TIM_HandleTypeDef *htim){
    TIMflag = 1;
    TIMcount++;
}

int main(void)
{
  HAL_Init();
  SystemClock_Config();
  MX_GPIO_Init();
    UART0_Init();
    NVIC_Init();
    TIM_Init();
    total = 0; bitcount = MAX_BITCOUNT;
    dispMode = 0;
    while (1) {
        int cnt;
        GPIO_PinState state;
        HAL_Delay(CHECK_DELAY);
        state = HAL_GPIO_ReadPin(GPIOA, GPIO_PIN_11);
        anti_jitter(&bitcount, state);    
        if (bitcount == 0){
            send = 1;
        }else{
            if (send == 2){
                send = 0;
            }
        }
        if (send == 1){
            send = 2;
            dispMode = 1 - dispMode;
        }
        if (TIMflag == 1){
            int head = (TIMcount - 1) % 8;
            int nexHead = (head + 1) % 8;
            float route = PA12count * PERIMETER;
            RouteTick[head] = route;
            TIMflag = 0;
            if (dispMode == 0){
                cnt = sprintf(str, "You traveled %.2f m\r\n", route);
            }else{
                float inThisTime = RouteTick[head] - RouteTick[nexHead];
                cnt = sprintf(str, "You traveled in %.2f m/s\r\n", inThisTime / 1.6);
            }
            HAL_UART_Transmit(&UartHandle, (uint8_t*)str, cnt, 500);
        }
    }
}

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_InitStruct.Mode = GPIO_MODE_INPUT;
  GPIO_InitStruct.Pull = GPIO_NOPULL;
  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_NOPULL;
  GPIO_InitStruct.Speed = GPIO_SPEED_LOW;
  HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);

}

2、stm32f1xx_hal_msp.c

void HAL_MspInit(void)
{
  __HAL_RCC_AFIO_CLK_ENABLE();

  HAL_NVIC_SetPriorityGrouping(NVIC_PRIORITYGROUP_4);

  /* System interrupt init*/
  /* MemoryManagement_IRQn interrupt configuration */
  HAL_NVIC_SetPriority(MemoryManagement_IRQn, 0, 0);
  /* BusFault_IRQn interrupt configuration */
  HAL_NVIC_SetPriority(BusFault_IRQn, 0, 0);
  /* UsageFault_IRQn interrupt configuration */
  HAL_NVIC_SetPriority(UsageFault_IRQn, 0, 0);
  /* DebugMonitor_IRQn interrupt configuration */
  HAL_NVIC_SetPriority(DebugMonitor_IRQn, 0, 0);
  /* SysTick_IRQn interrupt configuration */
  HAL_NVIC_SetPriority(SysTick_IRQn, 0, 0);
}

void HAL_TIM_Base_MspInit(TIM_HandleTypeDef* htim){
    __TIM3_CLK_ENABLE();
}

void HAL_TIM_Base_MspDeInit(TIM_HandleTypeDef* htim){
    __TIM3_CLK_DISABLE();
}

void HAL_UART_MspInit(UART_HandleTypeDef* huart)
{

  GPIO_InitTypeDef GPIO_InitStruct;
  if(huart->Instance==USART1)
  {
    __HAL_RCC_USART1_CLK_ENABLE();
__HAL_RCC_GPIOA_CLK_ENABLE();
__HAL_RCC_USART1_CLK_ENABLE();

    GPIO_InitStruct.Pin = GPIO_PIN_9;
    GPIO_InitStruct.Mode = GPIO_MODE_AF_OD;
    GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_HIGH;
    HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);

    GPIO_InitStruct.Pin = GPIO_PIN_10;
    GPIO_InitStruct.Mode = GPIO_MODE_INPUT;
    GPIO_InitStruct.Pull = GPIO_NOPULL;
    HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
  }

}

void HAL_UART_MspDeInit(UART_HandleTypeDef* huart)
{

  if(huart->Instance==USART1)
  {
    __HAL_RCC_USART1_CLK_DISABLE();
    __HAL_RCC_USART1_FORCE_RESET();
    __HAL_RCC_USART1_RELEASE_RESET();
    HAL_GPIO_DeInit(GPIOA, GPIO_PIN_9|GPIO_PIN_10);
  }
}