请编写寄存器版本的STM32F103使用硬件i2c作为从机模式的代码
时间: 2023-05-31 09:01:52 浏览: 71
以下是使用硬件I2C作为STM32F103从机模式的寄存器版本代码:
```c
#include "stm32f10x.h"
void I2C1_EV_IRQHandler(void);
void I2C1_ER_IRQHandler(void);
int main(void) {
// 使能时钟
RCC_APB1PeriphClockCmd(RCC_APB1Periph_I2C1, ENABLE);
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB, ENABLE);
// 配置GPIO引脚
GPIO_InitTypeDef GPIO_InitStruct;
GPIO_InitStruct.GPIO_Pin = GPIO_Pin_6 | GPIO_Pin_7; // SCL和SDA引脚
GPIO_InitStruct.GPIO_Mode = GPIO_Mode_AF_OD; // 开漏输出
GPIO_InitStruct.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOB, &GPIO_InitStruct);
// 配置I2C从机模式
I2C_InitTypeDef I2C_InitStruct;
I2C_InitStruct.I2C_Mode = I2C_Mode_I2C;
I2C_InitStruct.I2C_DutyCycle = I2C_DutyCycle_2;
I2C_InitStruct.I2C_OwnAddress1 = 0xA0; // 设置从机地址
I2C_InitStruct.I2C_Ack = I2C_Ack_Enable;
I2C_InitStruct.I2C_AcknowledgedAddress = I2C_AcknowledgedAddress_7bit;
I2C_InitStruct.I2C_ClockSpeed = 100000; // 设置频率为100kHz
I2C_Init(I2C1, &I2C_InitStruct);
// 使能I2C从机模式
I2C_Cmd(I2C1, ENABLE);
// 配置I2C中断
NVIC_InitTypeDef NVIC_InitStructure;
NVIC_InitStructure.NVIC_IRQChannel = I2C1_EV_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
NVIC_InitStructure.NVIC_IRQChannel = I2C1_ER_IRQn;
NVIC_Init(&NVIC_InitStructure);
// 使能I2C中断
I2C_ITConfig(I2C1, I2C_IT_EVT, ENABLE);
I2C_ITConfig(I2C1, I2C_IT_ERR, ENABLE);
while (1) {
// 主循环
}
}
void I2C1_EV_IRQHandler(void) {
// 处理I2C事件中断
if (I2C_GetITStatus(I2C1, I2C_IT_EVT) != RESET) {
// TODO: 处理事件
I2C_ClearITPendingBit(I2C1, I2C_IT_EVT);
}
}
void I2C1_ER_IRQHandler(void) {
// 处理I2C错误中断
if (I2C_GetITStatus(I2C1, I2C_IT_ERR) != RESET) {
// TODO: 处理错误
I2C_ClearITPendingBit(I2C1, I2C_IT_ERR);
}
}
```