STM32CubeMx开发之路—10使用IIC读写24C02附件源码仓库: 码云仓库运行环境Windows10STM32CubeMXVersion 5.2.0Keil5(MDK5)Version 5.28.0.0简介本例程主要讲解如何使用硬件IIC读写24C02STM32CubeMx基本配置基础配置过程请参考STM32CubeMx(Keil5)开发之路—配置第一个项目CubeMX配置IIC配置根据原理图可知需要的配置的是IIC2调试打印配置代码修改添加代码(讲解写在代码里面)/* Private user code ---------------------------------------------------------*/ /* USER CODE BEGIN 0 */ #define EE_TYPE 255 //类型 #define ADDR_24LCxx_Write 0xA0 //写指令IIC地址 #define ADDR_24LCxx_Read 0xA1 //读指令IIC地址 #define BufferSize 10 //读写大小(注意不要设置太大) uint8_t WriteBuffer[BufferSize] {0,1,2,3,4,5,6,7,8,9}; //需要写的数据在WriteBuffer当中 uint8_t ReadBuffer[BufferSize]; //读出来的数据放进ReadBuffer当中 int i 0; /* 调试打印 */ int fputc(int ch, FILE *f) { HAL_UART_Transmit(huart1, (uint8_t *)ch,1, 0xFFFF); return ch; } /* USER CODE END 0 */main函数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(); /* USER CODE BEGIN SysInit */ /* USER CODE END SysInit */ /* Initialize all configured peripherals */ MX_GPIO_Init(); MX_USART1_UART_Init(); MX_I2C2_Init(); /* USER CODE BEGIN 2 */ /* 写数据 */ HAL_Delay(5); if(HAL_I2C_Mem_Write(hi2c2, ADDR_24LCxx_Write, 0, I2C_MEMADD_SIZE_8BIT,WriteBuffer,BufferSize, 0x10) ! HAL_OK) { printf(Write fail!\n); } /* 读数据 */ HAL_Delay(5); if(HAL_I2C_Mem_Read(hi2c2, ADDR_24LCxx_Read, 0, I2C_MEMADD_SIZE_8BIT,ReadBuffer,BufferSize, 0x10) ! HAL_OK) { printf(Read fail!\n); } /* 测试输出 */ for(i0; iBufferSize; i) { printf(0x%02X ,ReadBuffer[i]); } /* USER CODE END 2 */ /* Infinite loop */ /* USER CODE BEGIN WHILE */ while (1) { /* USER CODE END WHILE */ /* USER CODE BEGIN 3 */ } /* USER CODE END 3 */ }运行结果烧录进去,用串口调试助手发现输出的就是我们存进的数据,说明测试成功小结IIC在实际应用过程非常广泛,是嵌入式需了解的协议之一,所以一定要好好理解!
