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[教程] 35..STM32F469I--- 外围接口测试---GPIO 和 USART

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    [LV.9]以坛为家II

    发表于 2018-1-12 21:03:09 |显示全部楼层
    【STM32F469I试用】+ 外围接口测试---GPIO 和 USART【转】

    由于测试串口是从扩展接口引出,且电平为TTL电平。因此我打算使用USB-TTL线缆,FTDI公司产品:TTL-232R-3V3。
    线缆实物图如下:

    1.jpg


    GPIO 测试,我打算针对4个用户指示LED灯来做测试,低电平点亮LED灯,高电平熄灭。

    2.jpg



    串口连接图:

    3.jpg


    利用扩展接口上的USART6进行串口测试,发送OK字符。检验串口功能。
    串口接收图:

    4.jpg


    功能比较简单,相信大部分用户都可以理解和应用。

    例程参考
    /**
      ******************************************************************************
      * @file    GPIO/GPIO_EXTI/Src/main.c
      * @author  MCD Application Team
      * @version V1.0.0
      * @date    14-August-2015
      * @brief   This example describes how to configure and use GPIOs through
      *          the STM32F4xx HAL API.
      ******************************************************************************
      * @attention
      *
      * <h2><center>© COPYRIGHT(c) 2015 STMicroelectronics</center></h2>
      *
      * Redistribution and use in source and binary forms, with or without modification,
      * are permitted provided that the following conditions are met:
      *   1. Redistributions of source code must retain the above copyright notice,
      *      this list of conditions and the following disclaimer.
      *   2. Redistributions in binary form must reproduce the above copyright notice,
      *      this list of conditions and the following disclaimer in the documentation
      *      and/or other materials provided with the distribution.
      *   3. Neither the name of STMicroelectronics nor the names of its contributors
      *      may be used to endorse or promote products derived from this software
      *      without specific prior written permission.
      *
      * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
      * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
      * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
      * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
      * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
      * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
      * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
      * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
      * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
      * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
      *
      ******************************************************************************
      */

    /* Includes ------------------------------------------------------------------*/
    #include "main.h"

    /** @addtogroup STM32F4xx_HAL_Examples
      * @{
      */

    /** @addtogroup GPIO_EXTI
      * @{
      */

    /* Private typedef -----------------------------------------------------------*/
    /* Private define ------------------------------------------------------------*/
    /* Private macro -------------------------------------------------------------*/
    /* Private variables ---------------------------------------------------------*/
    /* Private function prototypes -----------------------------------------------*/
    static void SystemClock_Config(void);
    static void EXTI0_IRQHandler_Config(void);
    /* Private functions ---------------------------------------------------------*/

    /**
      * @brief  Main program
      * @param  None
      * @retval None
      */
    int main(void)
    {
      /* STM32F4xx HAL library initialization:
           - Configure the Flash prefetch, instruction and Data caches
           - Systick timer is configured by default as source of time base, but user
             can eventually implement his proper time base source (a general purpose
             timer for example or other time source), keeping in mind that Time base
             duration should be kept 1ms since PPP_TIMEOUT_VALUEs are defined and
             handled in milliseconds basis.
           - Set NVIC Group Priority to 4
           - Low Level Initialization: global MSP (MCU Support Package) initialization
         */
      HAL_Init();

      /* Configure the system clock to 180 MHz */
      SystemClock_Config();

      /* -1- Initialize LEDs mounted on STM32469I-DISCOVERY board */
      BSP_LED_Init(LED1);

      /* -2- Configure EXTI0 (connected to PA.00 pin) in interrupt mode */
      EXTI0_IRQHandler_Config();

      /* Infinite loop */
      while (1)
      {
      }
    }

    /**
      * @brief  System Clock Configuration
      *         The system Clock is configured as follow :
      *            System Clock source            = PLL (HSE)
      *            SYSCLK(Hz)                     = 180000000
      *            HCLK(Hz)                       = 180000000
      *            AHB Prescaler                  = 1
      *            APB1 Prescaler                 = 4
      *            APB2 Prescaler                 = 2
      *            HSE Frequency(Hz)              = 8000000
      *            PLL_M                          = 8
      *            PLL_N                          = 360
      *            PLL_P                          = 2
      *            PLL_Q                          = 7
      *            PLL_R                          = 6
      *            VDD(V)                         = 3.3
      *            Main regulator output voltage  = Scale1 mode
      *            Flash Latency(WS)              = 5
      * @param  None
      * @retval None
      */
    static void SystemClock_Config(void)
    {
      RCC_ClkInitTypeDef RCC_ClkInitStruct;
      RCC_OscInitTypeDef RCC_OscInitStruct;
      HAL_StatusTypeDef ret = HAL_OK;

      /* Enable Power Control clock */
      __HAL_RCC_PWR_CLK_ENABLE();

      /* The voltage scaling allows optimizing the power consumption when the device is
         clocked below the maximum system frequency, to update the voltage scaling value
         regarding system frequency refer to product datasheet.  */
      __HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE1);

      /* Enable HSE Oscillator and activate PLL with HSE as source */
      RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE;
      RCC_OscInitStruct.HSEState = RCC_HSE_ON;
      RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
      RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE;
    #if defined(USE_STM32469I_DISCO_REVA)
      RCC_OscInitStruct.PLL.PLLM = 25;
    #else
      RCC_OscInitStruct.PLL.PLLM = 8;
    #endif /* USE_STM32469I_DISCO_REVA */
      RCC_OscInitStruct.PLL.PLLN = 360;
      RCC_OscInitStruct.PLL.PLLP = RCC_PLLP_DIV2;
      RCC_OscInitStruct.PLL.PLLQ = 7;
      RCC_OscInitStruct.PLL.PLLR = 6;

      ret = HAL_RCC_OscConfig(&RCC_OscInitStruct);
      if(ret != HAL_OK)
      {
        while(1) { ; }
      }

      /* Activate the OverDrive to reach the 180 MHz Frequency */  
      ret = HAL_PWREx_EnableOverDrive();
      if(ret != HAL_OK)
      {
        while(1) { ; }
      }

      /* Select PLL as system clock source and configure the HCLK, PCLK1 and PCLK2 clocks dividers */
      RCC_ClkInitStruct.ClockType = (RCC_CLOCKTYPE_SYSCLK | RCC_CLOCKTYPE_HCLK | RCC_CLOCKTYPE_PCLK1 | RCC_CLOCKTYPE_PCLK2);
      RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;
      RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
      RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV4;  
      RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV2;  

      ret = HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_5);
      if(ret != HAL_OK)
      {
        while(1) { ; }
      }
    }

    /**
      * @brief  Configures EXTI line 0 (connected to PA.00 pin) in interrupt mode
      * @param  None
      * @retval None
      */
    static void EXTI0_IRQHandler_Config(void)
    {
      GPIO_InitTypeDef   GPIO_InitStructure;

      /* Enable GPIOA clock */
      __HAL_RCC_GPIOA_CLK_ENABLE();

      /* Configure PA.00 pin as input floating */
      GPIO_InitStructure.Mode = GPIO_MODE_IT_RISING;
      GPIO_InitStructure.Pull = GPIO_NOPULL;
      GPIO_InitStructure.Pin = GPIO_PIN_0;
      HAL_GPIO_Init(GPIOA, &GPIO_InitStructure);

      /* Enable and set EXTI line 0 Interrupt to the lowest priority */
      HAL_NVIC_SetPriority(EXTI0_IRQn, 2, 0);
      HAL_NVIC_EnableIRQ(EXTI0_IRQn);
    }

    /**
      * @brief EXTI line detection callbacks
      * @param GPIO_Pin: Specifies the pins connected EXTI line
      * @retval None
      */
    void HAL_GPIO_EXTI_Callback(uint16_t GPIO_Pin)
    {
      if (GPIO_Pin == GPIO_PIN_0)
      {
        /* Toggle LED1 */
        BSP_LED_Toggle(LED1);
      }
    }

    #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 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) */

      /* Infinite loop */
      while (1)
      {
      }
    }
    #endif

    /**
      * @}
      */

    /**
      * @}
      */

    /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/

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