给我解释一下以下这些代码的作用:/* USER CODE BEGIN Header */ /***************************************************************************** Îļþ: main.c ×÷Õß: Zhengyu https://gzwelink.taobao.com °æ±¾: V1.0.0 ʱ¼ä: 20200401 ƽ̨:MINI-STM32F103C8T6 *******************************************************************************/ /* USER CODE END Header */ /* Includes ------------------------------------------------------------------*/ #include "main.h" #include "gpio.h" #include "oled.h" /* Private includes ----------------------------------------------------------*/ /* USER CODE BEGIN Includes */ /* USER CODE END Includes */ /* Private typedef -----------------------------------------------------------*/ /* USER CODE BEGIN PTD */ /* USER CODE END PTD */ /* Private define ------------------------------------------------------------*/ /* USER CODE BEGIN PD */ /* USER CODE END PD */ /* Private macro -------------------------------------------------------------*/ /* USER CODE BEGIN PM */ /* USER CODE END PM */ /* Private variables ---------------------------------------------------------*/ /* USER CODE BEGIN PV */ /* USER CODE END PV */ /* Private function prototypes -----------------------------------------------*/ void SystemClock_Config(void); /* USER CODE BEGIN PFP */ /* USER CODE END PFP */ /* Private user code ---------------------------------------------------------*/ /* USER CODE BEGIN 0 */ /* USER CODE END 0 */ /** * @brief The application entry point. * @retval int */ 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(); /* USER CODE BEGIN Init */ /* USER CODE END Init */ /* Configure the system clock */ SystemClock_Config();//8MÍⲿ¾§Õñ£¬72MϵͳÖ÷Ƶ /* USER CODE BEGIN SysInit */ /* USER CODE END SysInit */ /* Initialize all configured peripherals */ MX_GPIO_Init();//OLEDÒº¾§¿ØÖÆÒý½Å³õʼ»¯ /* USER CODE BEGIN 2 */ OLED_Init();//OLED³õʼ»¯ OLED_Clear();//ÇåÆÁ /* USER CODE END 2 */ /* Infinite loop */ /* USER CODE BEGIN WHILE */ while (1) { /* USER CODE END WHILE */ /* USER CODE BEGIN 3 */ OLED_Clear();//ÇåÆÁ OLED_ShowCHinese(18,0,0);//¹â OLED_ShowCHinese(36,0,1);//×Ó OLED_ShowCHinese(54,0,2);//Îï OLED_ShowCHinese(72,0,3);//Áª OLED_ShowCHinese(90,0,4);//Íø OLED_ShowString(6,3,"0.96' OLED TEST");//ÏÔʾ×Ö·û´® OLED_ShowString(0,6,"ASCII:"); OLED_ShowString(63,6,"CODE:"); HAL_Delay(5000);//µÈ´ý5000ms } /* USER CODE END 3 */ } /** * @brief System Clock Configuration * @retval None */ void SystemClock_Config(void) { RCC_OscInitTypeDef RCC_OscInitStruct = {0}; RCC_ClkInitTypeDef RCC_ClkInitStruct = {0}; /** Initializes the RCC Oscillators according to the specified parameters * in the RCC_OscInitTypeDef structure. */ RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE; RCC_OscInitStruct.HSEState = RCC_HSE_ON; RCC_OscInitStruct.HSEPredivValue = RCC_HSE_PREDIV_DIV1; RCC_OscInitStruct.HSIState = RCC_HSI_ON; RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON; RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE; RCC_OscInitStruct.PLL.PLLMUL = RCC_PLL_MUL9; if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK) { Error_Handler(); } /** Initializes the CPU, AHB and APB buses clocks */ 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_DIV2; RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1; if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_2) != HAL_OK) { Error_Handler(); } } /* USER CODE BEGIN 4 */ /* USER CODE END 4 */ /** * @brief This function is executed in case of error occurrence. * @retval None */ void Error_Handler(void) { /* USER CODE BEGIN Error_Handler_Debug */ /* User can add his own implementation to report the HAL error return state */ /* USER CODE END Error_Handler_Debug */ } #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, tex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */ /* USER CODE END 6 */ } #endif /* USE_FULL_ASSERT */ /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
时间: 2025-05-28 19:45:47 浏览: 27
### STM32F103C8T6 使用 OLED 显示屏的代码解释
#### 初始化部分
在使用 OLED 显示屏之前,需要对其进行初始化操作。以下是 `OLED_Init()` 函数的主要作用:
- 配置 IIC 或 SPI 接口(取决于硬件连接方式)。如果使用 IIC,则需配置 SDA 和 SCL 引脚;如果是 SPI,则需配置 MOSI、MISO、SCLK 和 CS 引脚。
- 设置显示屏的基础参数,例如对比度、显示方向等。
- 清除屏幕内容以确保初始状态为空白。
具体实现如下所示:
```c
void OLED_Init(void) {
// 初始化 GPIO 和时钟
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB | RCC_APB2Periph_AFIO, ENABLE);
// 配置 IIC/SPI 的 GPIO 引脚模式
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6 | GPIO_Pin_7; // 假设 PB6 为 SDA, PB7 为 SCL
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_OD;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOB, &GPIO_InitStructure);
// 发送初始化指令给 OLED 控制器 (SSD1306)
OLED_Write_Command(0xAE); // 关闭显示
OLED_Write_Command(0x40); // 设置显示地址到 RAM
OLED_Write_Command(0xB0); // 设置页地址
OLED_Write_Command(0xC8); // 设置 COM 输出扫描方向
OLED_Write_Command(0x00); // 设置低列地址
OLED_Write_Command(0x10); // 设置高列地址
OLED_Write_Command(0x81); // 设置对比度控制寄存器
OLED_Write_Command(0xFF); // 对比度值
OLED_Write_Command(0xA1); // 设置段重映射
OLED_Write_Command(0xA6); // 正常/反向显示
OLED_Write_Command(0xA8); // 多路复用比率
OLED_Write_Command(0x3F); // 比率值
OLED_Write_Command(0xD3); // 设置显示偏移量
OLED_Write_Command(0x00); // 不偏移
OLED_Write_Command(0xD5); // 设置振荡频率
OLED_Write_Command(0x80); // 默认值
OLED_Write_Command(0xD9); // 设置预充电周期
OLED_Write_Command(0xF1); // 默认值
OLED_Write_Command(0xDA); // 设置 COM 配置
OLED_Write_Command(0x12); // 默认值
OLED_Write_Command(0xDB); // 设置 VCOMH 寄存器
OLED_Write_Command(0x40); // 默认值
OLED_Write_Command(0x8D); // 开启电荷泵调节器
OLED_Write_Command(0x14); // 启用电荷泵
OLED_Write_Command(0xAF); // 打开显示
}
```
以上代码完成了对 SSD1306 控制器的基本配置[^1]。
---
#### 中断优先级配置
为了提高系统的实时性和稳定性,在多任务环境中通常会涉及中断优先级的设置。以下是对 NVIC 的简单配置示例:
```c
void NVIC_Configuration(void) {
NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2); // 设置抢占优先级和子优先级比例为 2:2
NVIC_InitTypeDef NVIC_InitStruct;
NVIC_InitStruct.NVIC_IRQChannel = EXTI0_IRQn; // 配置外部中断通道
NVIC_InitStruct.NVIC_IRQChannelPreemptionPriority = 1; // 抢占优先级
NVIC_InitStruct.NVIC_IRQChannelSubPriority = 1; // 子优先级
NVIC_InitStruct.NVIC_IRQChannelCmd = ENABLE; // 使能中断
NVIC_Init(&NVIC_InitStruct);
}
```
此部分主要用于管理外设中断请求,确保不会因多个设备竞争而导致数据丢失或延迟增加[^3]。
---
#### 中文显示功能
对于中文字符的支持,一般通过调用专门设计好的字体库来完成。这里展示如何利用自定义函数绘制汉字至屏幕上:
```c
// 定义一个用于显示汉字的方法
void GUI_ShowChinese(uint8_t x, uint8_t y, uint8_t size, const char *str, uint8_t mode) {
while (*str != '\0') {
uint16_t unicode = GBK_to_UNICODE(*str++); // 将 ASCII 编码转换成 Unicode
if (!unicode || !Is_Chinese_Char(unicode)) continue;
uint8_t width = Get_CJK_Width(unicode), height = Get_CJK_Height(unicode);
Draw_Bitmap(x, y, width, height, Get_CJK_Bitmap(unicode)); // 绘制位图
x += width; // 更新下一个字符位置
}
}
int main(void) {
delay_init();
NVIC_Configuration();
OLED_Init();
OLED_Clear(0); // 清屏
// 测试显示一段文字
GUI_ShowChinese(0, 35, 16, "你好世界", 1);
while (1) {}
}
```
上述方法中包含了几个重要环节:GBK 到 Unicode 的编码转化、判断是否属于有效范围内的汉字以及获取对应字形图案并渲染出来。
---
#### 总结说明
整个流程涵盖了从硬件资源分配到最后呈现图像的过程。其中涉及到的关键技术点包括但不限于 GPIO 引脚设定、通信协议适配、图形处理算法应用等方面的知识[^2]。
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