蓝桥杯物联网竞赛-OLED显示实验（HAL库）

• 1.进入STM32CubeMX选择相应的开发板
• 2.将用于控制OLED的引脚设置为推免输出
• 3.时钟配置选择
• 4.设置名称、选择路径及编程软件、生成代码
• 5.程序配置
• 6.程序补充代码
• 7.实验现象

1.进入STM32CubeMX选择相应的开发板

2.将用于控制OLED的引脚设置为推免输出

PA8和PB4分别为OLED的SCL引脚和SDL引脚，PB5控制OLED的开启与关闭

3.时钟配置选择

4.设置名称、选择路径及编程软件、生成代码

5.程序配置

（1）添加底层驱动文件 （在程序路径下对应的Inc和Src文件夹下） 大赛会提供

（2）在MDK5中添加这些驱动程序

6.程序补充代码

补充的代码主要是图下两个函数

// main.c 补充的函数

#include "main.h"
#include "i2c.h"
#include "oled.h"
#include "stdio.h"
#include "stm32l0xx_hal.h"
#include "string.h"





void Task_BrdInit(void);
void Task_Main(void);






















void SystemClock_Config(void);
static void MX_GPIO_Init(void);










int main(void)
{ 
  

  
  

  

  
  HAL_Init();

  

  

  
  SystemClock_Config();

  

  

  
  MX_GPIO_Init();
  

  
Task_BrdInit();
  
  
  while (1)
  { 
    
Task_Main();
    
  }
  
}

void Task_BrdInit(void)
{ 
    
    OLED_PowerControl(ENABLE);

    HAL_Delay(200);
    OLED_Init();
    OLED_Clear();

    OLED_ShowString(0, 0, (unsigned char *)" ", 16);
    OLED_ShowString(0, 2, (unsigned char *)" ", 16);

}

void Task_Main(void)
{ 
    char lcdLine_1st_line[16];
    char lcdLine_2st_line[16];

    sprintf(lcdLine_1st_line, "GXCT IOT ");
    sprintf(lcdLine_2st_line, "OLED Test ");

    OLED_ShowString(0, 0, (unsigned char *)lcdLine_1st_line, 16);
    OLED_ShowString(0, 2, (unsigned char *)lcdLine_2st_line, 16);

}



void SystemClock_Config(void)
{ 
  RCC_OscInitTypeDef RCC_OscInitStruct = { 0};
  RCC_ClkInitTypeDef RCC_ClkInitStruct = { 0};

  
  __HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE1);
  
  RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSI;
  RCC_OscInitStruct.HSIState = RCC_HSI_ON;
  RCC_OscInitStruct.HSICalibrationValue = RCC_HSICALIBRATION_DEFAULT;
  RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
  RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSI;
  RCC_OscInitStruct.PLL.PLLMUL = RCC_PLLMUL_3;
  RCC_OscInitStruct.PLL.PLLDIV = RCC_PLLDIV_2;
  if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
  { 
    Error_Handler();
  }
  
  RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK|RCC_CLOCKTYPE_SYSCLK
                              |RCC_CLOCKTYPE_PCLK1|RCC_CLOCKTYPE_PCLK2;
  RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;
  RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
  RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV1;
  RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1;

  if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_1) != HAL_OK)
  { 
    Error_Handler();
  }
}


static void MX_GPIO_Init(void)
{ 
  GPIO_InitTypeDef GPIO_InitStruct = { 0};

  
  __HAL_RCC_GPIOA_CLK_ENABLE();
  __HAL_RCC_GPIOB_CLK_ENABLE();

  

  
  HAL_GPIO_WritePin(GPIOA, GPIO_PIN_8, GPIO_PIN_RESET);

  
  HAL_GPIO_WritePin(GPIOB, GPIO_PIN_4|GPIO_PIN_5, GPIO_PIN_RESET);

  
  GPIO_InitStruct.Pin = GPIO_PIN_8;
  GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
  GPIO_InitStruct.Pull = GPIO_NOPULL;
  GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
  HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);

  
  GPIO_InitStruct.Pin = GPIO_PIN_4|GPIO_PIN_5;
  GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
  GPIO_InitStruct.Pull = GPIO_NOPULL;
  GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
  HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);

 
}






void Error_Handler(void)
{ 
  
  

  
}

#ifdef USE_FULL_ASSERT

void assert_failed(uint8_t *file, uint32_t line)
{  
  
  
  
}
#endif 

7.实验现象