个io模拟i2c从机的代码
时间: 2023-07-29 20:14:12 浏览: 92
当然!以下是一个简单的示例代码,用于模拟 I2C 从机设备的输入输出通信:
```c
#include <stdio.h>
#include <stdlib.h>
// 定义 I2C 从机地址
#define SLAVE_ADDRESS 0x50
// 模拟从机的数据缓冲区
unsigned char dataBuffer[256] = {
0x11, 0x22, 0x33, 0x44, 0x55, 0x66, 0x77, 0x88,
0x99, 0xAA, 0xBB, 0xCC, 0xDD, 0xEE, 0xFF
};
// 模拟 I2C 从机的写入操作
void i2c_slave_write(unsigned char *buffer, unsigned int length) {
// 解析主机发送的写入命令
unsigned char memoryAddress = buffer[0];
unsigned char *data = buffer + 1;
unsigned int dataLength = length - 1;
// 执行写入操作
for (int i = 0; i < dataLength; i++) {
dataBuffer[memoryAddress + i] = data[i];
}
printf("I2C Slave Write: Address=0x%02X, Data=", memoryAddress);
for (int i = 0; i < dataLength; i++) {
printf("0x%02X ", data[i]);
}
printf("\n");
}
// 模拟 I2C 从机的读取操作
void i2c_slave_read(unsigned char *buffer, unsigned int length) {
// 解析主机发送的读取命令
unsigned char memoryAddress = buffer[0];
unsigned int dataLength = buffer[1];
// 从数据缓冲区中读取数据
unsigned char *data = &dataBuffer[memoryAddress];
printf("I2C Slave Read: Address=0x%02X, Data=", memoryAddress);
for (int i = 0; i < dataLength; i++) {
buffer[i] = data[i];
printf("0x%02X ", buffer[i]);
}
printf("\n");
}
int main() {
// 模拟 I2C 从机接收和发送数据
unsigned char buffer[256];
unsigned int length;
while (1) {
// 模拟从机接收数据
length = read_i2c_data(buffer);
// 判断是写入操作还是读取操作
if (buffer[0] == SLAVE_ADDRESS && length > 1) {
i2c_slave_write(buffer + 1, length - 1);
} else if (buffer[0] == SLAVE_ADDRESS && length == 1) {
i2c_slave_read(buffer, length);
}
}
return 0;
}
```
这是一个简单的从机代码示例,其中包括模拟从机的写入和读取操作。你可以根据需要进行修改和扩展。注意,该示例代码中的 `read_i2c_data()` 函数需要根据你的具体硬件平台和 I2C 接口驱动进行实现。