Mbed OS 文档翻译 之 参考（API（驱动（I2CSlave）））

I2CSlave

使用 I2C Slave 与 I2C Master 通信。

同步级别：不受保护。

I2CSlave 类参考

mbed::I2CSlave 类参考

公共类型
enum	RxStatus { NoData = 0, ReadAddressed = 1, WriteGeneral = 2, WriteAddressed = 3 }

公共成员函数
	I2CSlave (PinName sda, PinName scl)
void	frequency (int hz)
int	receive (void)
int	read (char *data, int length)
int	read (void)
int	write (const char *data, int length)
int	write (int data)
void	address (int address)
void	stop (void)

受保护的属性
i2c_t	_i2c

I2CSlave 示例

尝试此示例以查看 I2C 响应器的工作原理。

#include 

I2CSlave slave(p9, p10);

int main() {
   char buf[10];
   char msg[] = "Slave!";

   slave.address(0xA0);
   while (1) {
       int i = slave.receive();
       switch (i) {
           case I2CSlave::ReadAddressed:
               slave.write(msg, strlen(msg) + 1); // Includes null char
               break;
           case I2CSlave::WriteGeneral:
               slave.read(buf, 10);
               printf("Read G: %s\n", buf);
               break;
           case I2CSlave::WriteAddressed:
               slave.read(buf, 10);
               printf("Read A: %s\n", buf);
               break;
       }
       for(int i = 0; i < 10; i++) buf[i] = 0;    // Clear buffer
   }
}