STM32HAL库iic接口
时间: 2023-08-10 15:13:18 浏览: 91
在使用STM32HAL库的I2C接口时,需要先初始化I2C相关的GPIO和I2C外设,并配置I2C的时钟速率、地址等参数。下面是一个简单的示例代码:
```c
#include "stm32f1xx_hal.h"
I2C_HandleTypeDef hi2c1;
void MX_I2C1_Init(void)
{
hi2c1.Instance = I2C1;
hi2c1.Init.ClockSpeed = 100000;
hi2c1.Init.DutyCycle = I2C_DUTYCYCLE_2;
hi2c1.Init.OwnAddress1 = 0;
hi2c1.Init.AddressingMode = I2C_ADDRESSINGMODE_7BIT;
hi2c1.Init.DualAddressMode = I2C_DUALADDRESS_DISABLE;
hi2c1.Init.OwnAddress2 = 0;
hi2c1.Init.GeneralCallMode = I2C_GENERALCALL_DISABLE;
hi2c1.Init.NoStretchMode = I2C_NOSTRETCH_DISABLE;
if (HAL_I2C_Init(&hi2c1) != HAL_OK)
{
Error_Handler();
}
}
void HAL_I2C_MspInit(I2C_HandleTypeDef* i2cHandle)
{
GPIO_InitTypeDef GPIO_InitStruct = {0};
if(i2cHandle->Instance==I2C1)
{
/* Configure GPIO pins */
__HAL_RCC_GPIOB_CLK_ENABLE();
GPIO_InitStruct.Pin = GPIO_PIN_6|GPIO_PIN_7;
GPIO_InitStruct.Mode = GPIO_MODE_AF_OD;
GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_HIGH;
HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);
/* Configure I2C */
__HAL_RCC_I2C1_CLK_ENABLE();
HAL_NVIC_SetPriority(I2C1_IRQn, 0, 1);
HAL_NVIC_EnableIRQ(I2C1_IRQn);
}
}
void HAL_I2C_MspDeInit(I2C_HandleTypeDef* i2cHandle)
{
if(i2cHandle->Instance==I2C1)
{
/* Deconfigure GPIO pins */
HAL_GPIO_DeInit(GPIOB, GPIO_PIN_6|GPIO_PIN_7);
/* Deconfigure I2C */
__HAL_RCC_I2C1_CLK_DISABLE();
HAL_NVIC_DisableIRQ(I2C1_IRQn);
}
}
```
另外,还需要使用相关的HAL库函数来实现I2C的读写操作。例如,使用`HAL_I2C_Master_Transmit()`函数发送数据,使用`HAL_I2C_Master_Receive()`函数接收数据。具体使用方法可以参考ST官方提供的HAL库文档。
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